TAT8858AH Applications CATV Line Amplifiers CATV System Amplifiers Distribution Nodes Green Applications SOIC-6 Wide Package Product Features Functional Block Diagram 75 Ω, 50-000 MHz Bandwidth GaAs phemt & MESFET Technology User configurable gain: 7 db Integrated linearization Choice of output device to optimize cost/performance Flexible bias voltage and current for optimum efficiency SOIC-6 Wide Package Out A Lin Adj A In A Bias A Bias B In B Lin Adj B Pin Reference Mark 6 Bias A 5 In A Out A Gate A 5 6 7 Gate B Out B 0 In B Out B 8 9 Bias B Backside Paddle - RF/DC GND General Description The TAT8858AH is a cost effective 75 Ω RFIC Amplifier designed for use in high gain V or V CATV applications up to 000 MHz. It works with readily available SMT baluns and transformers to provide a highly flexible low cost replacement for traditional hybrids. Gain of the TAT8858AH may be easily adjusted by varying external components, allowing for a family of push-pull hybrid solutions to be developed from a single RFIC. The TAT8858AH provides integrated linearization to improve the rd order distortion performance. The TAT8858AH may be protected against ESD and transient surges with the TQP0000 and an output filter network. Consult TriQuint for discussion. The TAT8858AH supports traditional V and V supply voltages. Bias current may be adjusted to suit particular requirements with standard or active biasing approaches. Consult TriQuint for further discussion. Pin Configuration Pin No. Label Pin No. Label OUT A 0 IN B LIN ADJ A OUT B IN A GATE B BIAS A GATE A 5 BIAS B OUT A 6 IN B 5 IN A 7 LIN ADJ B 6 BIAS A 8 OUT B Backside 9 BIAS B Paddle RF/DC GND Ordering Information Part No. Description TAT8858AH RFIC TAT8858AH-PCB V 50-000 MHz Eval Board TAT8858AH-PCB V 50-000 MHz Eval Board Standard T/R size = 000 pieces on a 7" reel Data Sheet: Rev C 0// - of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
TAT8858AH Absolute Maximum Ratings Parameter Rating Storage Temperature 65 to 50 C Operation of this device outside the parameter ranges given above may cause permanent damage. Recommended Operating Conditions Parameter Min Typ Max Units Supply Voltage (V CC ) V I CC 70 ma T CASE 0 +0 C T J (for >0 6 hours MTTF) +50 C Electrical performance is measured and guaranteed under conditions noted in the electrical specifications table. Specifications are not guaranteed over all recommended operating conditions. Electrical Specifications Test conditions unless otherwise noted: V CC =+V, Temp= +5 C, 75 Ω system. Parameter Conditions Min Typ Max Units Operational Frequency Range 50 000 MHz Gain db Input Return Loss 50-000 MHz 8 db Output Return Loss 6 db Gain db Input Return Loss 50-00 MHz db Output Return Loss db Output PdB f=500 MHz 8 dbm Output IP f=5 MHz, f=5 MHz, Pout= + dbm/tone dbm Composite Triple Beat () -69 dbc Composite Second Order () -68 dbc Composite Intermodulation Noise () -70 db XMOD () -6 dbc Noise Figure 50-000 MHz.0 db V bias V () I DD 70 ma Thermal Resistance, θ jc Module (junction to case).0 C/W Notes:. 79ch. NTSC + QAM (-6dB offset) to 00.5 MHz flat input, dbmv/ch Vout at channel.. Active biasing in easily implemented with traditional dual-pnp approaches. Biasing at V is also possible. Data Sheet: Rev C 0// - of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
TAT8858AH TAT8858AH-PCB V Schematic +V J L0 R7 L9 C9 GND C C5 R8 Vgate L5 C7 C Ra R9 R R R9 C L R0 C5 6 J RF Input C Cin C C R0 R C0 R5 L7 L8 5 6 7 U TAT8857F 5 0 R R L L L9 R R Vgate L7 L8 T C L0 C RF Output R6 8 9 R R R0 C L R Rb C6 L6 C8 L0 C0 C R8 TAT8858AH-PCB V Evaluation Board Layout C9 L9 R7 C C R L5 R C7 R5 C R9 L C R0 C5 L R Ra L7 L0 C T R0 R L7 L8 U R R L9 T C0 R R L8 C C C0 L0 R8 L6 C8 R R6 C R0 L L C6 R C Rb R9 R8 C5 L0 C Data Sheet: Rev C 0// - of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
Bill of Material TAT8858AH-PCB V TAT8858AH Reference Des. Value Description Manuf. Part Number n/a n/a Printed Circuit Board TriQuint U n/a SOIC6W IC TriQuint TAT8858 T n/a TX Line Transformer, rd winding, : Macom MABA-0088-CT760 T n/a TX Line Transformer, Special, : Macom Mini-Circuits MABA-00768-CT00 TRS-T-+ C0, C. pf CAP 00, ± 0.pF, 50V, NPO/COG TDK C005C0GHRB C5, C6.7pF CAP 00, ± 0.pF, 50V, NPO/COG Murata GRM555CHR7BZ0D C, C, C7, C8, C, C, C 0.0 uf CAP 00, 0%, 50V, X7R various C, C 0 pf CAP 00, 0%, 50V, X7R Panasonic ECJ-0EBHK C9, C0, C 70 pf CAP 00, 5%, 50V, NPO/COG TDK CGABC0GH7J C, C5 0.0 uf CAP 060, 0%, 50V, X7R AVX 0605C0KATA Cin 0. pf CAP 00, ± 0.05pF, 5V AVX 00J0RABWTR L, L 70 nh IND 00, 5% CoilCraft 00AF-7XJLU L9, L0 nh IND 00, 5% CoilCraft 00CS-NXJLW L5, L6 6 nh IND 00, 5% CoilCraft 00CS-8NXJLW L0.0 nh IND 00, 5% CoilCraft 00CS-N0XJLW L7, L8. nh IND 00, 5% CoilCraft 00CS-NXJLW L0 900 nh IND 008, 0% CoilCraft 008AF-90XKLC L, L nh IND 00, 5% CoilCraft 00CS-NXJLW L7, L8, L9 600 Ω RES 00, 00mA bead Murata BLM5AG60SN R7, R8 6.0 Ω RES 00, %, 50V, /0W various R, R 0.0 kω RES 00, %, 50V, /0W various R, R 60 Ω RES 00, %, 50V, /0W various R8.70 kω RES 060, %, 75V, /0W various R9.00 kω RES 060, %, 75V, /0W various R5 8.06 kω RES 00, %, 50V, /0W various R6 8. kω RES 00, %, 50V, /0W various R9, R0 00 Ω RES 00, %, 50V, /6W various Ra, Rb 5.0 Ω RES 00, %, 50V, /0W various R, R.0 kω RES 00, %, 50V, /0W various R, R.0 Ω RES 00, %, 50V, /6W various R0, R.0 Ω RES 00, %, 50V, /6W various R0, R.0 Ω RES 06, %, 00V, /W various Data Sheet: Rev C 0// - of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
Performance Plots TAT8858AH-PCB V Test conditions unless otherwise noted: V CC=+ V, I DD = 70 ma, T CASE = +5 C, 75 Ω system TAT8858AH 7 Gain vs. Frequency -5 Input Return Loss vs. Frequency 0 Output Return Loss vs. Frequency Gain (db) 5 +85 C +5 C 0 C S (db) -0-5 -0-5 +85 C +5 C 0 C S (db) -5-0 -5-0 +85 C +5 C 0 C 9-0 -5 7-5 -0 5 0 00 00 600 800 000 00 Frequency (MHz) -0 0 00 00 600 800 000 00 Frequency (MHz) -5 0 00 00 600 800 000 00 Frequency (MHz) PdB vs. Frequency 5 Noise Figure vs. Frequency 85 CIN vs. Frequency PdB (dbm) 0 8 6 +85 C +5 C 0 C NF (db) +85 C +5 C 0 C CIN (db) 80 75 70 65 +85 C +5 C 0 C 60 0 0 00 00 600 800 000 00 Frequency (MHz) 0 0 00 00 600 800 000 00 Frequency (MHz) 55 0 00 00 00 00 500 600 Frequency (MHz) -60 CTB vs. Frequency -60 CSO vs. Frequency -50 XMOD vs. Frequency CTB (dbc) -65-70 -75-80 +85 C +5 C 0 C CSO (dbc) -65-70 -75-80 +85 C +5 C 0 C XMOD (dbc) -55-60 -65-70 -75 +85 C +5 C 0 C -85-85 -80-90 0 00 00 00 00 500 600 Frequency (MHz) -90 0 00 00 00 00 500 600 Frequency (MHz) -85 0 00 00 00 00 500 600 Frequency (MHz) Data Sheet: Rev C 0// - 5 of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
TAT8858AH TAT8858AH-PCB V Schematic L5 R7 L9 C9 C L C Ra +V GND J C L0 C5 R8 L9 Vgate R C7 R L R9 R0 C5 R9 6 R5 5 L R L7 RF Input C C R0 R R C C0 L8 5 6 7 U TAT8857F 0 R R L Vgate Cgate R R5 R6 T C L0 C RF Output R6 8 9 L8 R R L R0 R C6 C8 C L6 R8 L0 C0 L Rb C TAT8858AH-PCB V Evaluation Board Layout T C9 L9 R7 C C R0 R R C0 L7 L8 R L5 R R C7 R5 U Ra R9 L C R0 C5 L R R R R L9 Rd L8 L7 T L0 C C C C0 L0 R8 L6 C8 R R6 Rb R0 L L C6 R C Re R9 R8 C5 L0 C Data Sheet: Rev C 0// - 6 of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
Bill of Material TAT8858AH-PCB V TAT8858AH Reference Des. Value Description Manuf. Part Number n/a n/a Printed Circuit Board TriQuint U n/a SOIC6W IC TriQuint TAT8858 T n/a TX Line Transformer, rd winding, : Macom MABA-0088-CT760 T n/a TX Line Transformer, Special, : Macom Mini-Circuits MABA-00768-CT00 TRS-T-+ C0, C. pf CAP 00, ± 0.pF, 50V, NPO/COG TDK C005C0GHRB C5, C6.7pF CAP 00, ± 0.pF, 50V, NPO/COG Murata GRM555CHR7BZ0D C, C, C7, C8, C, C, C 0.0 uf CAP 00, 0%, 50V, X7R various C, C 0 pf CAP 00, 0%, 50V, X7R Panasonic ECJ-0EBHK C9, C0, C 70 pf CAP 00, 5%, 50V, NPO/COG TDK CGABC0GH7J C, C5 0.0 uf CAP 060, 0%, 50V, X7R AVX 0605C0KATA Cgate 00 pf CAP 00, 0%, 50V, X7R various L, L 880 nh IND 0805, ±5% GOWANDA CC0805-880J- L9, L0 nh IND 00, 5% CoilCraft 00CS-NXJLW L5, L6 6 nh IND 00, 5% CoilCraft 00CS-6NXJLW L0.0 nh IND 00, 5% CoilCraft 00CS-N0XJLW L7, L8. nh IND 00, 5% CoilCraft 00CS-NXJLW L0 900 nh IND 008, 0% CoilCraft 008AF-90XKLC L, L nh IND 00, 5% CoilCraft 00CS-NXJLW L8, L9, L, L 600 Ω RES 00, 00mA bead Murata BLM5AG60SN R7, R8 6.0 Ω RES 00, %, 50V, /0W various R, R.00 kω RES 00, %, 50V, /0W various R, R 60 Ω RES 00, %, 50V, /0W various R8.70 kω RES 060, %, 75V, /0W various R9 85 Ω RES 060, %, 75V, /0W various R5 5.0 kω RES 00, %, 50V, /0W various R6 9.0 kω RES 00, %, 50V, /0W various R9, R0 0.0 Ω RES 00, %, 50V, /6W various Ra, Rb 5.0 Ω RES 00, %, 50V, /0W various R5, R6.0 Ω RES 00, 5%, 50V, /0W various R, R.0 kω RES 00, %, 50V, /0W various R, R.0 Ω RES 00, %, 50V, /6W various R0, R.0 Ω RES 00, %, 50V, /6W various R0, R, R 9.0 ohm RES 06, %, 00V, /W various Data Sheet: Rev C 0// - 7 of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
Performance Plots TAT8858AH-PCB V Test conditions unless otherwise noted: V CC=+ V, I DD = 60 ma, T CASE = +5 C, 75 Ω system TAT8858AH 0-5 Gain (db) 0 8 S S S -0-5 Return Loss (db) 6-0 0 00 00 600 800 000 00 00 Freq (MHz) -5-55 TAT8858 V CTB 80 ch NTSC FLAT; v, 60mA -55 TAT8858 V CSO 80 ch NTSC FLAT; v, 60mA Vout/ch Distortion (dbc) -60-65 -70-75 9 8 7 6 5 Distortion (dbc) -60-65 -70-75 9 8 7 6 5-80 0 00 00 00 00 500 600-80 0 00 00 00 00 500 600 Freq (MHz) Freq (MHz) Data Sheet: Rev C 0// - 8 of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
TAT8858AH 8 db Gain Reference Design TAT8858AH +V J L0 GND C C5 R8 R7 L9 C9 C7 Vgate R C7 C C5 R9 R5 C7 R R9 C L R0 R5 6 L C C C R R0 C0 R5 L7 L8 5 6 7 U TAT8857F 5 0 C6 R R L9 L7 L8 Vgate T C L0 C RF Output RF Input R6 8 9 R6 C8 R R0 C L R R6 R C8 L0 C0 C C8 C6 R8 TAT8858AH 8 db Gain Reference Design Layout L C9 L9 R7 C C R R5 R C7 C7 R5 R9 C L C R0 C5 L R C7 R5 L7 L0 C T R R0 L7 L8 U C6 R R L9 T C0 R R L8 C C C0 L0 R8 R6 C8 R R6 R0 C L L C6 R C R6 C8 R9 R8 C5 L0 C C8 Data Sheet: Rev C 0// - 9 of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
TAT8858AH Bill of Material TAT8858AH 8 8 db Gain Reference Design Reference Des. Value Description Manuf. Part Number n/a n/a Printed Circuit Board TriQuint U n/a SOIC6W IC TriQuint TAT8858 T n/a TX Line Transformer, : MA-COM MABA-0088-CT760 T n/a TX Line Transformer, Special, : MA-COM Mini-Circuits MABA-00768-CT00 TRS-T-+ C 70 pf CAP 00, 5%, 50V, NPO/COG TDK CGABC0GH7J C5, C6 5.6 pf CAP 00, ± 0.pF, 50V, NPO/COG Murata GRM555CH5R6BZ0D C, C, C7, C8, C, C, C 0.0 uf CAP 00, 0%, 50V, X7R various C, C 70 pf CAP 00, 0%, 50V, X7R Panasonic ECJ-0EBH7K C9, C0 560 pf CAP 00, 5%, 50V, NPO/COG TDK CGABC0GH56J C, C5 0.0 uf CAP 060, 0%, 50V, X7R AVX 0605C0KATA C7, C8, C6, C7, C8 0.5 pf CAP 00, ± 0.pF, 5V, NPO/COG AVX 00J0R5BBSTR C0, C.5 pf CAP 00, ± 0.pF, 50V, NPO/COG TDK C005C0GHR5B L, L 80 nh IND 00, 5% CoilCraft 00AF-8XJLU L9, L0, L7, L8.9 nh IND 00, 5% CoilCraft 00CS-N9XJLW R5, R6 70 Ω RES 00, %, /6W various L0, L.0 nh IND 00, 5% CoilCraft 00CS-N0XJLW L0 900 nh IND 008, 0% CoilCraft 008AF-90XKLC R5, R6 5.0 Ω RES 00, %, /0W various L7, L8, L9 600 Ω RES 00, 00mA ferrite bead Murata BLM5AG60SN0 R7, R8 8.0 Ω RES 00, %, /0W various R, R 0.0 kω RES 00, %, /0W various R, R 0.0 Ω RES 00, /0W various R8.70 kω RES 060, %, /0W various R9.00 kω RES 060, %, /0W various R5 0.0 kω RES 00, %, /0W various R6 8. kω RES 00, %, /0W various R9, R0 00 Ω RES 00, %, /6W various R, R.0 Ω RES 00, %, /6W various R0, R 5.0 Ω RES 00, %, /6W various R0, R.0 ohm RES 06, %, /W various Data Sheet: Rev C 0// - 0 of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
Performance Plots 8 db Gain Reference Design Test conditions unless otherwise noted: V CC=+ V, I DD = 70 ma, T CASE = +5 C, 75 Ω system TAT8858AH CSO, CTB, XMOD (dbc) -60-6 -6-66 -68-70 -7-7 -76-78 -80 70 68 66 6 6 60 58 56 5 5 50 0 00 00 00 00 500 600 Freq CCN (db) NF (db) 5.5.5.5.5 0.5 Noise Figure TAT8858 8 db Configuration 0 0 00 00 600 800 000 00 Freq (MHz) NF (db) 5.5.5.5.5 0.5 Low End Noise Figure TAT8858 8 db Configuration 0 0 0 60 80 00 Freq (MHz) Data Sheet: Rev C 0// - of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
TAT8858AH 00 MHz Reference Design TAT8858AH +V J L0 R7 L9 C9 GND C C5 R8 Vgate L5 C7 C Ra R9 R R R9 C L R0 C5 6 J RF Input C Cin C C R0 R C0 R5 L7 L8 5 6 7 U TAT8857F 5 0 R R L L L9 R R Vgate L7 L8 T C L0 C RF Output Cout R6 8 9 R0 C0 R L6 R C8 L0 R0 C0 C L C R Rb C6 R8 TAT8858AH 00 MHz Reference Design Layout Cin C0 C0 C9 L9 R7 C C R L5 R C7 R5 C R9 L C R0 C5 L R Ra L7 L0 C T R0 R L7 L8 U R R L9 T C0 R R L8 C C C0 L0 R8 L6 C8 R R6 C R0 L L C6 R C Rb R9 R8 C5 L0 C Cout Data Sheet: Rev C 0// - of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
Bill of Material TAT8858AH 00 MHz Reference Design TAT8858AH Reference Des. Value Description Manuf. Part Number n/a n/a Printed Circuit Board TriQuint U n/a SOIC6W IC TriQuint TAT8858 T n/a TX Line Transformer, rd winding, : Macom MABA-0088-CT760 T n/a TX Line Transformer, Special, : Macom Mini-Circuits MABA-00768-CT00 TRS-T-+ C0, C. pf CAP 00, ± 0.pF, 50V, NPO/COG TDK C005C0GHRB C5, C6.7pF CAP 00, ± 0.pF, 50V, NPO/COG Murata GRM555CHR7BZ0D C, C, C7, C8, C, C, C 0.0 uf CAP 00, 0%, 50V, X7R various C, C 0 pf CAP 00, 0%, 50V, X7R Panasonic ECJ-0EBHK C9, C0, C 70 pf CAP 00, 5%, 50V, NPO/COG TDK CGABC0GH7J C, C5 0.0 uf CAP 060, 0%, 50V, X7R AVX 0605C0KATA C0 pf CAP 00, 5%, 50V, NPO/COG Murata GRM555CH0JA0D Cin 0. pf CAP 00, ± 0.05pF, 5V AVX 00J0RABWTR Cout 0.5 pf CAP 00, ± 0.pF, 5V AVX 00J0R5BBSTR L, L 70 nh IND 00, 5% CoilCraft 00AF-7XJLU L9, L0 nh IND 00, 5% CoilCraft 00CS-NXJLW L5, L6 6 nh IND 00, 5% CoilCraft 00CS-8NXJLW L0.7 nh IND 00, 5% CoilCraft 00CS-N7XJLW L7, L8. nh IND 00, 5% CoilCraft 00CS-NXJLW L0 900 nh IND 008, 0% CoilCraft 008AF-90XKLC L, L nh IND 00, 5% CoilCraft 00CS-NXJLW L7, L8, L9 600 Ω RES 00, 00mA bead Murata BLM5AG60SN R7, R8 6.0 Ω RES 00, %, 50V, /0W various R, R 0.0 kω RES 00, %, 50V, /0W various R, R 60 Ω RES 00, %, 50V, /0W various R8.70 kω RES 060, %, 75V, /0W various R9.00 kω RES 060, %, 75V, /0W various R5 8.06 kω RES 00, %, 50V, /0W various R6 8. kω RES 00, %, 50V, /0W various R9, R0 00 Ω RES 00, %, 50V, /6W various Ra, Rb 5.0 Ω RES 00, %, 50V, /0W various R, R.0 kω RES 00, %, 50V, /0W various R, R.0 Ω RES 00, %, 50V, /6W various R0, R.0 Ω RES 00, %, 50V, /6W various R0, R.0 Ω RES 06, %, 00V, /W various R0.0 kω RES 00, %, 50V, /0W various Data Sheet: Rev C 0// - of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
TAT8858AH Performance Plots TAT8858AH 00 MHz Reference Design Test conditions unless otherwise noted: V CC=+ V, I DD = 70 ma, T CASE = +5 C, 75 Ω system Gain (db) 8 6 0 Gain vs. Frequency Temp.=+5 C S, S (db) 0-5 -0-5 -0-5 -0 Return Loss vs Frequency Temp.=+5 S S 8-5 6 0 00 00 600 800 000 00 Frequency (MHz) -0 0 00 00 600 800 000 00 Frequency (MHz) Data Sheet: Rev C 0// - of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
TAT8858AH Detailed Device Description The TAT8858AH is a -stage balanced amplifier using phemt & MESFET Technology. Each stage utilizes cascode topology to provide wide bandwidth and efficient linear amplification. The TAT8858 allows flexibility to set the gain and bias to meet the requirements of different applications without additional active devices. Bias options allow the designer to select either V bias for lower power dissipation green designs, or V for existing power supply systems. The TAT8858AH push-pull amplifier can be configured to split a V supply (and share the same current) or both amplifiers can be biased from a V supply and draw current independently. DC Operation In V application output stage A is in series with input stage A, shown as in simplified DC diagram below. Output stage B is in series with input stage B. The DC current I (A+B) flows from V to ground through stage A & B in the direction shown below. C 0.0 uf C 0.0 uf Pin Pin6 R0 A B Pin I A Pin5 Pin Pin8 C 0 pf L 70 nh C 0 pf Pin5 Pin0 A B Pin6 Pin9 Pin Pin L7. nh I A I B L8. nh T to BALUN OUT IN SEC PRI OUT GND MABA-00768 -CT00 L0.0nH C.0uF C 70 pf I (A+B) V RF OUT R I B L 70 nh Data Sheet: Rev C 0// - 5 of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
TAT8858AH Detailed Device Description Bias Current Adjustment R7 6 L9 nh C9 70pF Bias current is determined by settings:. Size of DC feedback resistors - decreasing R & R will increase the bias current IDD.. Tail resistors - decreasing R0, R will increase IDD, but lead to wider variations. Active biasing schemes are possible but not necessary for most applications. R0 C.pF L5 6nH R 60 L7 600 C7.0uF R 0k R5 8.06k 5 R9 00 C 0.0u BIAS A LIN ADJ A A A U BIAS A GATE A 8857D TAT8858 BIAS B GATE B 6 5 C L 70 R Best performance is with IDD = 70mA R C0.pF L8 600 R6 8.k 6 7 B LIN ADJ B 0 R B 8 9 BIAS B R 60 R 0k R0 00 C 0.0u L 70 L6 6nH C8.0uF C R8 6 L0 nh C0 70pF Biasing of Output FET:. Voltage split ratio is left to the customer and is set by Vgate.. In V application no cap should be put on Vgate. This prevents a turn-on over-voltage condition from damaging the output FET.. Voltage divider should be done with same or lower resistor values to prevent gate leakage current in the output FET from affecting Vgate. No capacitance on Vgate. Data Sheet: Rev C 0// - 6 of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
TAT8858AH Detailed Device Description RF Operation Gain Setting There are two primary ways to adjust the low frequency gain.. Adjust shunt feedback resistors around input and output stages.. Adjust resistors in inter stage equalizer. R7 6 L9 nh C9 70pF.0u L5 6nH C7.0uF C 0pF Ra 5 R 60 R 0k R9 00 C 0.0u BIAS A 6 L 70nH R0 C5.7 pf L7 600 L8 600 R5 8.06k LIN ADJ A A A BIAS A U TAT8858 8857D 5 BIAS B GATE B 5 GATE A R R L R nh.k L. L9 600 Vgate L Tilt Adjustment. Adding inductors in series with the shunt feedback resistors will peak the gain. Data Sheet: Rev C 0// - 7 of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
TAT8858AH Detailed Device Description Inter stage Equalizer Use inter stage network for gain and tilt adjustment. Two inter stage RLC networks shape the gain and return loss without affecting the noise figure and output performance.. Increasing inductor L9 will provide up-tilt. C9 affects very low frequency response.. Ra and C5 will affect up-tilt shape. Stage A Stage A Pin R0 Pin5 R7 6 C 0 pf Ra 5 C5.7 pf L9 nh C9 70 pf Inter stage equalizer Data Sheet: Rev C 0// - 8 of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
TAT8858AH Detailed Device Description Return Loss Adjustment. Low frequency return loss should be considered at the same time with gain using the feedback and equalizer resistor values.. High frequency return loss can be adjusted with changes to the capacitor and inductor values near the input balun and output transformer. R 0k R9 00 R 60 CTB Linearization. R5, R6 determines linearizer bias current. Increasing R5, R6 decreases linearizer bias current. Decreasing R5, R6 increases linearizer bias current.. R5, R6 value in the reference design has been empirically optimized for the best CTB. R5, R6 settings have some impact on CSO. C uf C uf R0 C.pF R C0.pF R5 8.06k L7 600 5 L8 600 R6 8.k 6 7 8 LIN ADJ A A U BIAS A 8857D TAT885 BIAS B B LIN ADJ B R 60 R 0k R0 00 Data Sheet: Rev C 0// - 9 of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
TAT8858AH Detailed Device Description CSO Optimization CSO is strongly dependent on circuit balance. Requires attention to:. Good input balun balance.. Good output transformer balance.. Maintaining symmetrical gain and phase response between circuit halves. MABA-088-CT760 RF IN Cin 0.pF C.0uF T C.0uF C. R0 Input balun R C. Ma, Oa Mb, Ob Ma, Oa Output transformer Mb, Ob T to BALUN OUT IN SEC OUT PRI GND MABA-00768 -CT00 L0.0nH C.0uF Circuit Balance. Pre-amp stage (stage A & stage B) is done with a differential pair topology.. A high impedance from Pin & 5 to ground helps the pre-amp keep balance when the input balun is not perfect.. Ferrite beads can achieve high impedance at low cost. Two beads can be used to increase the current handling capability. Data Sheet: Rev C 0// - 0 of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
TAT8858AH Detailed Device Description Stability. Significant stabilization circuits have been placed on the RFICs. However, external circuitry can affect stability.. These components are helpful to reduce out of band gain and improve stability. Data Sheet: Rev C 0// - of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
TAT8858AH Detailed Device Description DC Operation - V Supply Application DC wise in V application output stage A is in parallel with input stage A, shown as in simplified DC diagram below. Similarly stage B is in parallel with input stage B. The DC current I (A+B), I A, I B flow from V to ground through stage A & B in the direction shown below. C 0.0 uf C 0.0 uf Pin R0//R//R Pin6 R0//R//R A B Pin Pin5 I A Pin Pin8 C 0 pf L 880 nh V C 0 pf L 880 nh V Pin5 Pin0 A R9 0 R0 0 B Pin6 Pin9 Pin Pin L7. nh L8. nh T to BALUN OUT SEC OUT IN PRI GND MABA-00768 -CT00 L0.0nH V C.0uF C 70 pf I RF OUT I B RF Operation RF analysis for V supply application circuit is very similar to V. Please refer to the earlier part of Detailed Device Description for details. Evaluation Board PCB Information TriQuint PCB 50-077-0 Material and Stack-up.000" oz. Cu top layer 0.0 ± 0.005 Finished Board Thickness FR0 ε r =. typ..000" oz. Cu bottom layer Data Sheet: Rev C 0// - of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
TAT8858AH Pin Configuration and Description Pin Reference Mark Out A Lin Adj A In A Bias A Bias B In B Lin Adj B 5 6 7 6 Bias A 5 In A Out A Gate A Gate B Out B 0 In B Out B 8 9 Bias B Pin No. Symbol Description Backside Paddle - RF/DC GND OUT A Stage A cascode amplifier drain output. Connect to stage A cascode amplifier input Pin 6 using DC blocking cap C, buffer and gain equalizer network (R0, Ra, C5), as shown in schematic page. LIN ADJ A Linearization adjustment A. Connect to ground using R5 to set linearizer bias. IN A Stage A cascode amplifier gate input. Connect to a balun output using blocking cap C. Connect to stage A output Pin using feedback network (R, L5, R, C7) to set gain and DC bias current. Connect to R0, R virtual ground using C5 to improve S. BIAS A Stage A cascode amplifier source. Connect to ground using L7, R0. Pin and Pin 5 are connected on chip. 5 BIAS B Stage B cascode amplifier source. Connect to ground using L8, R. Pin and Pin 5 are connected on chip. 6 IN B Stage B cascode amplifier gate input. Connect to a balun output using blocking cap C. Connect to stage B output Pin 8 using feedback network (R, L6, R, C8) to set gain and DC bias current. Connect to R0, R virtual ground using C6 to improve S. 7 LIN ADJ B Linearization adjustment B. Connect to ground using R6 to set linearizer bias. 8 OUT B Stage B cascode amplifier drain output. Connect to stage B cascode amplifier input Pin 0 using DC blocking cap C, buffer and gain equalizer network (R, Rb, C6). 9 BIAS B Stage B cascode amplifier source. Connect to ground using serial RC network in V application. Connect to ground using serial resistor - bead network in V application. See more in detailed device description. BIAS B and BIAS A are connected on chip. 0 IN B Stage B cascode amplifier input. Connect to stage B cascode amplifier drain output as explained in Pin 8 description. OUT B Stage B cascode amplifier drain output. Requires DC bias applied through the output balun, RL feedback network and series matching inductor. GATE B Stage B cascode amplifier output FET gate. Connect to gate bias using a resistor and a bead. GATE A Stage A cascode amplifier output FET gate. Connect to gate bias using a resistor and a bead. OUT A Stage A cascode amplifier drain output. Requires DC bias applied through the output balun, RL feedback network and series matching inductor. 5 IN A Stage A cascode amplifier input. Connect to stage A cascode amplifier drain output as explained in Pin description. 6 BIAS A Stage A cascode amplifier source. Connect to ground using serial RC network in V application. Connect to ground using serial resistor - bead network in V application. See more in detailed device description. BIAS A and BIAS B are connected on chip. Backside Paddle RF/DC GND RF/DC ground. Use recommended via pattern to minimize inductance and thermal resistance; see PCB Mounting Pattern for suggested footprint. Data Sheet: Rev C 0// - of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
TAT8858AH Mechanical Information Package Marking and Dimensions Notes:. All dimensions are in millimeters. Angles are in degrees.. Except where noted, this part outline conforms to JEDEC standard MO-0, Issue E (Variation VGGC) for thermally enhanced plastic very thin fine pitch quad flat no lead package (QFN).. Dimension and tolerance formats conform to ASME Y.M-99.. The terminal # identifier and terminal numbering conform to JESD 95- SPP-0. PCB Mounting Pattern Notes:. All dimensions are in millimeters. Angles are in degrees.. Use oz. copper minimum for top and bottom layer metal.. A heatsink underneath the area of the PCB for the mounted device is strictly required for proper thermal operation. Damage to the device can occur without the use of one.. Vias are required under the backside paddle of this device for proper RF/DC grounding and thermal dissipation. 5. Do not remove or minimize via hole structure in the PCB. Thermal and RF grounding is critical. 6. We recommend a 0.5mm (#80/.05") diameter bit for drilling via holes and a final plated thru diameter of 0.5 mm (0.0 ). 7. Ensure good package backside paddle solder attach for reliable operation and best electrical performance. Data Sheet: Rev C 0// - of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com
TAT8858AH Product Compliance Information ESD Sensitivity Ratings Caution! ESD-Sensitive Device ESD Rating: Class III Value: Passes 500 V Test: Human Body Model (HBM) Standard: JEDEC Standard JESD-A MSL Rating MSL Rating: Level Test: 60 C convection reflow Standard: JEDEC Standard IPC/JEDEC J-STD-00 Solderability Compatible with both lead-free (60 C max. reflow temperature) and tin/lead (5 C max. reflow temperature) soldering processes. Contact plating: Matte Tin RoHs Compliance This part is compliant with EU 00/95/EC RoHS directive (Restrictions on the Use of Certain Hazardous Substances in Electrical and Electronic Equipment). This product also has the following attributes: Halogen Free (Chlorine, Bromine) Antimony Free TBBP-A (C 5 H Br 0 ) Free PFOS Free SVHC Free Contact Information For the latest specifications, additional product information, worldwide sales and distribution locations, and information about TriQuint: Web: www.triquint.com Tel: +.50.65.9000 Email: info-sales@triquint.com Fax: +.50.65.890 For technical questions and application information: Email: sjcapplications.engineering@triquint.com Important Notice The information contained herein is believed to be reliable. TriQuint makes no warranties regarding the information contained herein. TriQuint assumes no responsibility or liability whatsoever for any of the information contained herein. TriQuint assumes no responsibility or liability whatsoever for the use of the information contained herein. The information contained herein is provided "AS IS, WHERE IS" and with all faults, and the entire risk associated with such information is entirely with the user. All information contained herein is subject to change without notice. Customers should obtain and verify the latest relevant information before placing orders for TriQuint products. The information contained herein or any use of such information does not grant, explicitly or implicitly, to any party any patent rights, licenses, or any other intellectual property rights, whether with regard to such information itself or anything described by such information. TriQuint products are not warranted or authorized for use as critical components in medical, life-saving, or lifesustaining applications, or other applications where a failure would reasonably be expected to cause severe personal injury or death. Data Sheet: Rev C 0// - 5 of 5 - Disclaimer: Subject to change without notice 0 TriQuint www.triquint.com