300MHz, Low-Power, High-Output-Current, Differential Line Driver

Transcription

1 9-; Rev ; /9 EVALUATION KIT AVAILABLE 3MHz, Low-Power, General Description The differential line driver offers high-speed performance while consuming only mw of power. Its amplifier has fully symmetrical inputs and outputs and uses laser-trimmed, matched, thin-film resistors to deliver 7dB CMR at MHz. Using current-feedback techniques, the achieves a 3MHz bandwidth and a 2V/µs slew rate. Optimized for differential, high-output-current applications such as transformer drivers, the drives ±2.V into a 2.5Ω load (single-ended) or ±5.V into a 53Ω load (differential). This device is preset for a closed-loop gain of 2V/V. Its ultra-low.%/.3 differential gain/phase allow for a variety of video and RF signal-processing applications. For power-sensitive applications, the has a shutdown function that reduces supply current to less than ma. In addition, superior SFDR (-2dBc at khz, RL = 33Ω) makes it ideal as a transformer driver for HDSL applications. For a complete differential transmission link, use the with the MAX line receiver (see the MAX data sheet for more information). Features 2V/V Fixed Gain 3MHz -3dB Bandwidth 2V/µs Slew Rate 2dBc SFDR at khz 7dB CMR at MHz Low Differential Gain/Phase:.%/.3 High Output Drive: ±5.V into 53Ω Low Power: mw Ordering Information PART TEMP. RANGE PPACKAGE ESD - C to +5 C SO Pin Configuration Applications TOP VIEW VDSL, ADSL, HDSL Video Twisted-Pair Driver Differential Pulse Amplifier Differential ADC Driver V EE N.C. SHDN N.C R f R G R f 3 2 V CC SENSE+ SENSE- Typical Application Circuit V CC V EE 7 9 SO SENSE+ SENSE OUT MAX SENSE- R t R t R t R t VDSL TRANSFORMER ISOLATION Maxim Integrated Products For free samples & the latest literature: or phone For small orders, phone ext. 3.

2 ABSOLUTE MAXIMUM RATINGS Supply Voltage (V CC to V EE )...2V Voltage on Any Input to Ground...(V CC +.3V) to (V EE -.3V) Continuous Power Dissipation (T A = +7 C) SO (derate.33mw/ C above +7 C)...7mW Short-Circuit Duration...sec Operating Temperature Range ESD...- C to +5 C Storage Temperature Range...-5 C to + C Lead Temperature (soldering, sec)...+3 C 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. ELECTRICAL CHARACTERISTICS (V CC = +5V, V EE = -5V, T A = T MIN to T MAX, unless otherwise noted. Typical values are at T A = +25 C.) PARAMETER DC SPECIFICATIONS Input Offset Voltage Input Offset Voltage Drift Input Bias Current Input Offset Current Input Voltage Noise Input Current Noise Input Capacitance Differential Input Resistance Differential Input Voltage Range Common-Mode Input Voltage Range Common-Mode Rejection Power-Supply Rejection Quiescent Supply Current Shutdown Supply Current Output Current Drive SHDN High Threshold SHDN Low Threshold V OS TCV OS I B C IN V CM CMR PSR I SY I SHDN I OUT V IH V IL V OUT = V, R L = V OUT = V, R L = V OUT = V, R L =, V IN = -V OS V OUT = V, R L =, V IN = -V OS f = khz R L = V CM = ±2.V V S = ±.5V to ±5.5V V IN =, R L = V IN =, R L = Single-ended, R L = Differential, R L = V OUT = ±2.2V CONDITIONS Gain A V -V V OUT +V, R L = 53Ω 2.5 mv 3 µv/ C 9 2 µa.3 2 µa nv/ Hz µv RMS.7 pa/ Hz 7 na RMS pf MΩ V Gain Error -V V OUT +V, R L = 53Ω.3 % Output Voltage Swing SHDN Input Current SYMBOL I OS e n I n V OUT I SHDN f = khz f = MHz to MHz f = MHz to MHz R L = Single-ended, R L = 2.5Ω Differential, R L = 53Ω MIN TYP MAX UNITS V SHDN.V 75 5 µa V SHDN 2V na V V/V db db ma ma V ma V V 2

3 ELECTRICAL CHARACTERISTICS (continued) (V CC = +5V, V EE = -5V, T A = T MIN to T MAX, unless otherwise noted. Typical values are at T A = +25 C.) -3dB Bandwidth PARAMETER AC SPECIFICATIONS Full-Power Bandwidth.dB Bandwidth Common-Mode Rejection Slew Rate Settling Time Differential Gain Differential Phase Spurious-Free Dynamic Range SYMBOL BW (-3dB) FPBW BW (.db) CMR SR t s DG DP SFDR V OUT.V RMS V OUT = 2Vp-p V OUT.V RMS CONDITIONS MIN TYP MAX f = MHz Differential, -2V V OUT +2V 2 V V OUT +V, R L = 5Ω, to.% A VCL = +2 to.% 3 f = 3.5MHz, R L = 5Ω. f = 3.5MHz, R L = 5Ω.3 f C = khz, V OUT =.Vp-p, R L = 33Ω singleended, R S = 5Ω, Figure f C = 5MHz, V OUT = 2Vp-p, R L = 5Ω differential, Figure UNITS MHz MHz MHz db V/µs ns % degrees dbc 3

4 Typical Operating Characteristics (V CC = +5V, V EE = -5V, R L = 5Ω, T A = +25 C, unless otherwise noted.) GAIN (db) A VCL = +2 SMALL-SIGNAL GAIN k M M M G TOC- GAIN (db) LARGE-SIGNAL GAIN k M M M -2 G CMR (db) COMMON-MODE REJECTION k M M M TOC-2 SMALL-SIGNAL PULSE RESPONSE A VCL = +2 LARGE-SIGNAL PULSE RESPONSE A VCL = +2 IN IN VOLTAGE (2mV/div) OUT VOLTAGE (5mV/div) OUT TIME (ns/div) TIME (ns/div) PSR (db) POWER-SUPPLY REJECTION - OUTPUT IMPEDANCE (Ω), CLOSED-LOOP OUTPUT IMPEDANCE - ISOLATION RESISTANCE (Ω) ISOLATION RESISTANCE vs. CAPACITATIVE LOAD MAX/7-7 k M M M. k M M M CAPACITATIVE LOAD (pf)

5 Typical Operating Characteristics (continued) (V CC = +5V, V EE = -5V, R L = 5Ω, T A = +25 C, unless otherwise noted.) VOLTAGE NOISE (nv/ Hz) VOLTAGE NOISE k k k M - CURRENT NOISE (na/ Hz) CURRENT NOISE k k k M -9 HARMONIC DISTORTION (dbc) MHz HARMONIC DISTORTION vs. LOAD 3RD HARMONIC 2 LOAD (Ω) 2ND HARMONIC MAX/7- HARMONIC DISTORTION (dbc) A VCL = +2V V = 2Vp-p HARMONIC DISTORTION 3RD HARMONIC -9 2ND HARMONIC - k M M M TOC-5 HARMONIC DISTORTION (dbc) MHz HARMONIC DISTORTION vs. OUTPUT SWING 3RD HARMONIC 2 3 OUTPUT SWING (Vp-p) 2ND HARMONIC MAX/7-2 OUTPUT SWING (Vp-p) 2 OUTPUT SWING vs. LOAD RESISTANCE LOAD (Ω) MAX/7-3 2 POWER-SUPPLY CURRENT vs. TEMPERATURE MAX/ INPUT OFFSET VOLTAGE vs. TEMPERATURE MAX/7-5 INPUT BIAS CURRENT vs. TEMPERATURE MAX/7- CURRENT (ma) 9 VOLTAGE (mv)..5 CURRENT (µa) TEMPERATURE ( C) TEMPERATURE ( C) TEMPERATURE ( C) 5

6 Typical Operating Characteristics (continued) (V CC = +5V, V EE = -5V, R L = 5Ω, T A = +25 C, unless otherwise noted.) VOLTAGE (V) DIFFERENTIAL OUTPUT VOLTAGE SWING vs. TEMPERATURE TEMPERATURE ( C) MAX/7-7 GAIN (db) SMALL-SIGNAL GAIN AND CAPACITIVE LOAD C L = 5pF C L = pf C L =5pF - k M M M - PHASE (deg) GAIN (%) DIFFERENTIAL GAIN AND PHASE. A.5 V = +2V/V IRE..3 A V = +2V/V IRE TOC- Pin Description PIN NAME, 7 V EE Negative Power Supply. Connect to -5V. 2 Noninverting Input 3, 5 N.C. No Connect. Not internally connected. SHDN Inverting Input FUNCTION Logic Input for Shutdown Circuitry. A logic low enables the amplifier. A logic high disables the amplifier. The amplifier outputs are high impedance in shutdown mode; thus the impedances seen at and are that of the feedback resistors and the protection circuitry (Figure 3)., V CC Positive Power Supply 9 Inverting Output SENSE- Sense Line for the Inverting Output. Connect to, close to the pin. Ground 2 SENSE+ Sense Line for the Noninverting Output. Connect to, close to the pin. 3 Noninverting Output

7 R G 5Ω R T 5Ω 33Ω V MEASURE R G 5Ω R T 5Ω V MEASURE + 5Ω 33Ω V MEASURE - Figure. Single-Ended Distortion Setup Figure 2. Differential Distortion Setup.k 7 7 Figure 3. Shutdown Equivalent Circuit 7

8 Package Information e D B A A.mm.in. C L - DIM A A B C E e H L MIN INCHES.5 MAX MILLIMETERS MIN MAX E H Narrow SO SMALL-OUTLINE PACKAGE (.5 in.) DIM D D D PINS INCHES MIN MAX MILLIMETERS MIN MAX A 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, 2 San Gabriel Drive, Sunnyvale, CA Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.