MAX2387/MAX2388/MAX2389

Transcription

1 19-13; Rev 1; /1 EVALUATION KIT AVAILABLE W-CDMA LNA/Mixer ICs General Description The MAX37/MAX3/ low-noise amplifier (LNA), downconverter mixers designed for W-CDMA applications, are ideal for ARIB (Japan) and ETSI- UMTS (Europe) based systems. The MAX37/ MAX3/ feature ultra-low current consumption and exceptionally low noise figures in ultra-small packages. The MAX37/MAX3 include an LNA, a downconverter mixer, and a local-oscillator (LO) buffer. The has an LNA and mixer, but minimizes current consumption by omitting the LO buffer. For all devices, the LNA and downconverter mixers are optimized for the 1MHz to 17MHz band. All devices feature a high-gain mode and a low-gain mode of LNA operation. The MAX37 has a 3 gain step, and the MAX3/ have an 1 gain step. All ICs include a shutdown mode, powering down the IC during the front-end receiver s idle periods. The mixer 3rd-order nonlinearity performance is set using an external biasing resistor. For the MAX37/ MAX3, mixer performance is optimized for a -m typical drive at the LO buffer input port. The mixer performance is optimized for a -m typical drive at the LO input port. The LO port for all versions is configurable for either single-ended or differential operation. These devices operate from a +.7V to +3.3V single supply and are available in ultra-small (3mm 3mm) 1-pin leadless packages (QFN). Applications Japanese 3rd-Generation W-CDMA Cellular Phones Dual-Mode W-CDMA/GSM Cellular Phones Features Ultra-Low Current Consumption:.7mA (MAX37), 9.9mA (MAX3), and 7.9mA () +.7V to +3.3V Single-Supply Operation Mixer NF: 7 SSB Cascaded Noise Figure:.3 LNA Low-Gain Mode: 3 Gain Step (MAX37) or 1 Gain Step (MAX3/) Mixer IIP3: m < 1µA Shutdown Current Ultra-Small (3mm 3mm) 1-Pin QFN Package Ordering Information PART TEMP. RANGE PIN-PACKAGE MAX37EGC - C to + C 1 QFN MAX3EGC - C to + C 1 QFN EGC - C to + C 1 QFN Pin Descriptions/Functional Diagrams MAX37/MAX3/ TOP VIEW 1 GND 11 LNA_IN MAX37/MAX3 1 GND 11 LNA_IN LNA_OUT 1 9 V CC LNA_OUT 1 9 V CC GAIN IF+ GAIN IF+ MIX_IN 3 7 IF- MIX_IN 3 7 IF- SHDN LO+ LO- SHDN LO+ LO- Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1--9-, or visit Maxim s website at

2 MAX37/MAX3/ ABSOLUTE MAXIMUM RATINGS V CC to GND...-.3V to +.3V SHDN, GAIN to GND...-.3V to (V CC +.3V) AC Signals...+1V peak Digital Input Current...±mA Continuous Power Dissipation (T A = +7 C) 1-Pin QFN (derate 11.9mW/ C above T A = +7 C)...9mW Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICS Operating Temperature Range...- C to + C Junction Temperature...+1 C Storage Temperature Range...- C to +1 C Soldering Temperature (s)...+3 C (V CC = +.7V to +3.3V, SHDN = high, R = kω, no input AC signals, T A = - C to + C. Typical values are at V CC = +.7V, T A = + C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Supply Current I CC High-gain mode Low-gain mode MAX MAX MAX MAX Shutdown Supply Current I CC SHDN = low. 1. µa Digital Input Logic High V IH. V Digital Input Logic Low V IL. V ma Input Logic High Current I IH V IN = V IH 1 µa Input Logic Low Current I IL V IN = V IL - µa AC ELECTRICAL CHARACTERISTICS (MAX3_ EV kit, V CC =.7V, SHDN = high, f RF_IN = f LNA_IN = 1MHz, f LO = 33MHz (f IF = 19MHz). Mixer, LNA, and LO input ports are driven with Ω sources. R = kω ±1%, P LO = -m (MAX37/MAX3), P LO = -m (), P RF = -3m. Typical values are at V CC = +.7V, T A = + C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS LNA PERFORMANCE: (GAIN = HIGH) RF Frequency Range (Note 1) f RF 1 17 MHz T A = + C Gain G LNA T A = - C to + C (Note )

3 AC ELECTRICAL CHARACTERISTICS (continued) (MAX3_ EV kit, V CC =.7V, SHDN = high, f RF_IN = f LNA_IN = 1MHz, f LO = 33MHz (f IF = 19MHz). Mixer, LNA, and LO input ports are driven with Ω sources. R = kω ±1%, P LO = -m (MAX37/MAX3), P LO = -m (), P RF = -3m. Typical values are at V CC = +.7V, T A = + C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Noise Figure (Notes 1, 3) NF LNA T A = + C rd-Order Input Intercept Point (Note ) Input -1 Compression Point (Note 1) LNA PERFORMANCE: (GAIN = LOW) IIP3 LNA T A = - C to + C (Note ). m IP m T A = + C Gain G LNA T A = - C to + C (Note ) MAX MAX3/ MAX MAX3/ Noise Figure (Notes 1, 3) NF LNA MAX3/ 3rd-Order Input Intercept Point (Note ) IIP3 LNA. -.7 MAX MAX37 1 MAX3/ Input -1 Compression Point IP -1 MAX3/ MIXER PERFORMANCE (GAIN = HIGH).. 3. MAX RF Frequency Range (Note 1) f RF 1 17 MHz LO Frequency Range (Note 1) f LO MHz IF Frequency Range (Note 1) f IF 1 MHz T A = + C. 11. Power Conversion Gain G MXR T A = - C to + C (Note ) m m MAX37/MAX3/ Noise Figure (SSB) (Note 1) NF MXR T A = + C MAX MAX

4 MAX37/MAX3/ AC ELECTRICAL CHARACTERISTICS (continued) (MAX3_ EV kit, V CC =.7V, SHDN = high, f RF_IN = f LNA_IN = 1MHz, f LO = 33MHz (f IF = 19MHz). Mixer, LNA, and LO input ports are driven with Ω sources. R = kω ±1%, P LO = -m (MAX37/MAX3), P LO = -m (), P RF = -3m. Typical values are at V CC = +.7V, T A = + C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 3rd-Order Input Intercept Point (Notes 1, 3) Input -1 Compression Point (Note 1) MIXER PERFORMANCE (GAIN = LOW) MAX37 IIP3 MXR MAX3 IP - 1,M XR T A = - C to + C MAX MAX T A = + C Power Conversion Gain (Note 1) G MXR T A = - C to + C. 1. Noise Figure (SSB) (Note 1) NF MXR T A = + C 3rd-Order Input Intercept Point (Note ) Input -1 Compression Point (Note 1) IIP3 MXR IP - 1,M XR T A = + C T A = - C to + C Note 1: Guaranteed by design and characterization. Note : MIN guaranteed by production test, MAX guaranteed by design and characterization. Note 3: Includes input matching circuit loss. Note : fin1 = 1MHz, fin = 11MHz, PIN = -3m per tone. Note : fin1 = 1MHz, fin = 11MHz, PIN = -m per tone. MAX37.9. MAX MAX37.7 MAX MAX MAX m m m m

5 (T A = + C, VCC = +.7V, unless otherwise noted.) SUPPLY CURRENT (ma) CONVERSION GAIN () ISOLATION () MAX37 SUPPLY CURRENT vs. TEMPERATURE V CC = +.7V V CC = +.7V V CC = +3.3V V CC = +.3V V CC = +.3V V CC = +3.3V MAX37 MIXER CONVERSION GAIN vs. LO INPUT POWER LO INPUT LEVEL (m) MAX37 MIXER LO-IF AND LO-RF ISOLATION vs. LO FREQUENCY LO-RF: LO-IF: LO-RF: LO-IF: V CC = +.7V LO = -m MAX37//9 toc1 MAX37//9 toc MAX37//9 toc7 GAIN () IIP (m) NOISE FIGURE () MAX37 LNA GAIN vs. TEMPERATURE MAX37 MIXER IIP AND IIP3 vs. TEMPERATURE IIP:, SINGLE- ENDED LO IIP:, DIFFERENTIAL LO IIP3: - IIP3: MAX37 LNA NOISE FIGURE vs. FREQUENCY Typical Operating Characteristics MAX37//9 toc MAX37//9 toc MAX37//9 toc IIP3 (m) -1 COMPRESSION POINT (m) NOISE FIGURE () MAX37 LNA IIP3 vs. TEMPERATURE MAX37 MIXER INPUT -1 COMPRESSION POINT vs. TEMPERATURE MAX37 MIXER NOISE FIGURE vs. LO POWER LO POWER () MAX37//9 toc3 MAX37//9 toc MAX37//9 toc9 MAX37/MAX3/

6 MAX37/MAX3/ Typical Operating Characteristics (continued) (T A = + C, VCC = +.7V, unless otherwise noted.) SUPPLY CURRENT (ma) CONVERSION GAIN () MAX3 SUPPLY CURRENT vs. TEMPERATURE V CC = +.7V V CC = +.7V V CC = +3.3V V CC = +.3V V CC = +.3V V CC = +3.3V MAX3 MIXER CONVERSION GAIN vs. LO INPUT POWER LO INPUT LEVEL (m) MAX37//9 toc MAX37//9 toc13 GAIN () IIP (m) MAX3 LNA GAIN vs. TEMPERATURE MAX3 MIXER IIP AND IIP3 vs. TEMPERATURE IIP:, SINGLE-ENDED LO IIP:, DIFFERENTIAL LO IIP3: - IIP3: MAX37//9 toc11 MAX37//9 toc1 IIP3 (m) -1 COMPRESSION POINT (m) MAX3 LNA IIP3 vs. TEMPERATURE MAX3 MIXER INPUT -1 COMPRESSION POINT vs. TEMPERATURE MAX37//9 toc1 MAX37//9 toc1 3 3 MAX3 MIXER LO-IF AND LO-RF ISOLATION vs. LO FREQUENCY LO-RF: LO-RF: MAX37//9 toc1 MAX3 LNA NOISE FIGURE vs. FREQUENCY MAX37//9 toc17 7 MAX3 MIXER NOISE FIGURE vs. LO POWER MAX37//9 toc1 ISOLATION () 1 LO-IF: NOISE FIGURE () NOISE FIGURE () LO-IF: V CC = +.7V LO = -m LO POWER ()

7 Typical Operating Characteristics (continued) (T A = + C, VCC = +.7V, unless otherwise noted.) SUPPLY CURRENT (ma) CONVERSION GAIN () 1 1 SUPPLY CURRENT vs. TEMPERATURE V CC = +.7V V CC = +3.3V V CC = +.7V V CC = +.3V V CC = +.3V V CC = +3.3V MIXER CONVERSION GAIN vs. LO INPUT POWER LO INPUT LEVEL (m) MAX37//9 toc19 MAX37//9 toc GAIN () IIP (m) LNA GAIN vs. TEMPERATURE MIXER IIP AND IIP3 vs. TEMPERATURE IIP:, SINGLE-ENDED LO IIP:, DIFFERENTIAL LO - IIP3: IIP3: MAX37//9 toc MAX37//9 toc3 IIP3 (m) -1 COMPRESSION POINT (m) LNA IIP3 vs. TEMPERATURE MIXER INPUT -1 COMPRESSION POINT vs. TEMPERATURE MAX37//9 toc1 MAX37//9 toc MAX37/MAX3/ ISOLATION () 3 3 MIXER LO-IF AND LO-RF ISOLATION vs. LO FREQUENCY LO-RF: LO-IF: LO-RF: LO-IF: 1 V CC = +.7V LO = -m MAX37//9 toc NOISE FIGURE () LNA NOISE FIGURE vs. FREQUENCY MAX37//9 toc NOISE FIGURE () 9 7 MIXER NOISE FIGURE vs. LO POWER LO POWER () MAX37//9 toc7 7

8 MAX37/MAX3/ PIN NAME FUNCTION 1 LNA_OUT RF Output Port for LNA. Requires external matching. GAIN LNA/Mixer Gain Control Input 3 MIX_IN RF Input Port for Mixer. Internally matched to Ω. SHDN LO+ LO- Detailed Description The MAX37/MAX3/ include an LNA and downconverter mixer. These devices feature a shutdown mode to power down the IC during the frontend receiver s idle periods. Each IC operates from a +.7V to +3.3V single supply and is housed in a 1-pin ultra-small QFN (3mm 3mm) leadless package. The MAX37/MAX3/ are fabricated using an advanced high-frequency silicon germanium process. The LNA and mixer NF and IIP3 have been optimized to provide excellent RF performance in the 1MHz to 17MHz band, while drawing minimal current. For the MAX37/MAX3, the mixer s performance is optimized for a -m typical drive at the LO buffer input port. The s mixer performance is optimized for a -m typical drive at the LO input port. The LO port for all versions can be driven either singleended or differentially. LNA High/Low-Gain Mode These devices offer two modes of operation for the LNA: high-gain mode and low-gain mode, selectable with a GAIN select pin. The MAX37 has a gain of 1 in high-gain mode and -1. in low-gain mode. The MAX3/ have a gain of 1 in high-gain mode and -. in low-gain mode. Matching LNA in high-gain mode will ensure matching in low-gain mode. Pin Description Shutdown Input. Drive low to enable shutdown mode. Drive high or connect to V CC for normal operation. Noninverting LO Input for LO Buffer (MAX37/MAX3) or Mixer (). Differential input impedance is Ω. AC-couple to GND when the LO is driven single-endedly. Inverting LO Input for LO Buffer (MAX37/MAX3) or Mixer (). Differential input impedance is Ω. 7 IF- Inverting Mixer s IF Open-Collector Output IF+ Noninverting Mixer s IF Open-Collector Output 9 V CC Supply Voltage (+.7V to +3.3V). Capacitively bypass to GND near the IC. LNA_IN RF Input Port for LNA. Requires external matching. 11 GND Ground 1 LNA/Mixer Bias Pin. For nominal bias, connect kω ±1% resistor to GND. Downconverter Mixer The receive mixer is a wideband, single-balanced design with exceptional noise figure and linearity. The LO input frequency range is 33MHz to 3MHz and the RF input frequency range is 1MHz to 17MHz. The mixer is internally matched to Ω, thus eliminating any external matching components. LO Input Buffers The MAX37/MAX3 feature open-collector LO buffers to increase isolation between the LO and the rest of the system. The offers a lower current consumption for applications that do not require an LO buffer. RF Inputs The MIX_IN input is typically connected to the LNA output through an off-chip filter providing image rejection and out-of-band interferers filtering. The LNA input and output require an external matching network to Ω. Note that the mixer input is internally matched to Ω. See Figure 1, Typical Application Circuits for.1ghz. LO Inputs The LO+ and LO- pins are internally terminated with Ω resistors. AC-couple the local-oscillator signal to these pins. If a single-ended LO source is used, connect LO+ to ground using an AC-coupling capacitor.

9 IF Output Port The mixer output appears on the differential IF+ and IFpins. These open-collector outputs require an external inductor to V CC for DC biasing. This port typically requires a matching network for coupling to an external IF filter. Figures 1 and show examples of differential and single-ended IF port connections. Applications Information Layout A properly designed PC board is essential to any RF/microwave circuit. Keep RF signal lines as short as possible to minimize losses and radiation. Always use controlled impedance lines on all high-frequency inputs and outputs and use low-inductance connections to ground on all GND pins. At the mixer outputs, keep the differential lines together and of the same length to ensure signal balance..nh For the best gain and noise performance, use highquality components for the LNA input matching circuit, and solder the slug evenly to the board ground plane. For the power supplies, a star topology works well to isolate between different sections of the device. Each V CC node has its own path to a central V CC. Place decoupling capacitors that provide low impedance at the RF frequency of interest close to all V CC connections. The central V CC should have a large decoupling capacitor as well. (Use MAX37/MAX3/ EV kit as an example.) TRANSISTOR COUNT: Chip Information Typical Application Circuits MAX37/MAX3/ RX kω GND.pF TX.nH.pF nf LNA_OUT kω GAIN _SET LNA_IN 9 V CC 7nH pf IF+ kω 7nH VCC µf 39pF pf IF SAW RX BPF pf V CC Ω MIX_IN 3 MAX37 MAX3 7 IF- 39pF Z L nf kω LO+ LO- SHDN pf pf VCO Figure 1. MAX37/MAX3/ Differential IF Load; Single-Ended VCO 9

10 MAX37/MAX3/ RX BPF.pF RX TX.nH pf V CC Ω nf.pf LNA_OUT kω GAIN.nH MIX_IN nf kω SHDN kω MAX37 MAX3 GND LO+ pf VCO.nH LNA_IN V CC pf 7nH IF+ kω 7nH IF- IF OUT LO- Figure. MAX37/MAX3/ Differential IF Load; Differential VCO pf 9 7 VCC nf 39pF pf 39pF Z L IF SAW

11 Table 1. LNA Input/Output S-Parameters (VCC = +.7V, High-Gain Mode) S-PARAMETERS LNA (S11) LNA (S1) LNA (S1) LNA (S) FREQUENCY (MHZ) MAGNITUDE PHASE MAGNITUDE PHASE MAGNITUDE PHASE MAGNITUDE PHASE MAX37/MAX3/ Package Information For the latest package outline information, go to Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 1 San Gabriel Drive, Sunnyvale, CA Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.