LMH6503MA Wideband Variable Gain Amplifier 1 Circuit ±5V ±75mA SOIC-14 SMD

Description

LMH6503MA Wideband Variable Gain Amplifier 1 Circuit ±5V ±75mA SOIC-14 SMD The LMH6503MA from National Semiconductor is a wideband, DC-coupled, differential-input linear variable gain amplifier (VGA) consisting of a voltage-controlled gain stage followed by a high-speed current feedback op amp that can directly drive low-impedance loads. The device provides a gain adjustment range of more than 70dB for frequencies up to 10MHz (79dB typical). Maximum gain is set by external components — anywhere from 1V/V to 100V/V or higher — and the gain can be reduced all the way to cut-off. Gain control is linear in V/V throughout the adjustment range, using a control voltage from −1V to +1V relative to pin 11 (ground pin). The gain control pin has high input impedance, simplifying its drive requirement. Features −3dB bandwidth: 135MHz Gain control bandwidth: 100MHz Adjustment range (typical over temp): 70dB Gain matching (limit): ±0.7dB Slew rate: 1800V/µs Supply current (no load): 37mA Linear output current: ±75mA Output voltage (RL = 100Ω): ±3.2V Input voltage noise: 6.6nV/√Hz Input current noise: 2.4pA/√Hz THD (20MHz, RL = 100Ω, VO = 2VPP): −57dBc Specifications PRODUCT INFORMATION Part Number LMH6503MA Product Type Wideband, Low Power, Linear Variable Gain Amplifier (VGA) Package 14-Pin SOIC Package Marking LMH6503MA Transport Media 55 Units / Rail OPERATING CONDITIONS Supply Voltage (V+ − V−) 5V to 12V (±5V typical) Operating Temperature Range −40°C to +85°C Storage Temperature Range −65°C to +150°C Power Consumption 370mW Thermal Resistance θJA (SOIC-14) 138°C/W Thermal Resistance θJC (SOIC-14) 45°C/W AC / DYNAMIC PERFORMANCE (VS = ±5V, TA = 25°C, RF = 1kΩ, RG = 174Ω, RL = 100Ω, AV(MAX) = 10; typical values) −3dB Bandwidth (VOUT < 0.5VPP) 135 MHz −3dB Bandwidth (AV(MAX) = 100) 50 MHz Gain Control Bandwidth 100 MHz Gain Flatness (±0.2dB, −1V < VG < +1V) 40 MHz Gain Adjustment Range (f < 10MHz) 79 dB Gain Adjustment Range (f < 30MHz) 68 dB Adjustment Range (typical over temp) 70 dB Attenuation Range (±0.2dB flatness, f < 30MHz) 20 dB Attenuation Range (±0.1dB flatness, f < 30MHz) 6.6 dB Gain Matching (limit, at maximum gain) ±0.7 dB Gain Accuracy (VG = +1V) +0.25 dB (typ.) Linear Phase Deviation (DC to 60MHz) 1.6 deg Group Delay (DC to 130MHz) 2.6 ns Feed-through (VG = −1.2V, 30MHz, output referred) −48 dB Rise and Fall Time (0.5V step) 2.2 ns Overshoot (0.5V step) 10 % Slew Rate (4V step) 1800 V/µs Gain Change Rate (10%–90% of final output) 4.6 dB/ns DISTORTION & NOISE PERFORMANCE 2nd Harmonic Distortion (HD2, 2VPP, 20MHz) −60 dBc 3rd Harmonic Distortion (HD3, 2VPP, 20MHz) −61 dBc Total Harmonic Distortion (THD, 2VPP, 20MHz) −57 dBc Total Equivalent Input Noise (1MHz to 150MHz) 6.6 nV/√Hz Input Noise Current (1MHz to 150MHz) 2.4 pA/√Hz Differential Gain (f = 4.43MHz, RL = 150Ω) 0.15 % Differential Phase (f = 4.43MHz, RL = 150Ω) 0.22 deg DC & INPUT/OUTPUT CHARACTERISTICS Supply Current (no load) 37 mA (typ.), 50 mA (max.) Supply Current (no load, VS = ±2.5V) 12 mA (typ.) Linear Output Current ±75 mA (typ.) Output Voltage Range (RL = 100Ω) ±3.2 V (typ.) Output Voltage Range (RL = open) ±3.95 V (typ.) Output Offset Voltage (−1V < VG < +1V) ±80 mV (typ.), ±350 mV (max.) Output Impedance (DC) 0.1 Ω Input Voltage Range (VCM, pins 3 & 6) ±2.0 V (typ.) Differential Input Voltage (pins 3 & 6) ±0.34 V (typ.) Input Resistance 750 kΩ Input Capacitance 5 pF Input Bias Current 11 µA (typ.), 18 µA (max.) Input Offset Current 0.01 µA (typ.) Gain Control (VG) Input Resistance 70 kΩ Gain Control (VG) Input Capacitance 1.3 pF Gain Control Voltage Range −1V to +1V (relative to pin 11) Maximum Gain Setting (via external components) 1 V/V to 100 V/V or higher Gain Multiplier (K) 1.72 (typ.) +Power Supply Rejection Ratio (+PSRR) −80 dB (typ.) −Power Supply Rejection Ratio (−PSRR) −67 dB (typ.) Common Mode Rejection Ratio (CMRR) −67 dB (typ.) ABSOLUTE MAXIMUM RATINGS Supply Voltage (V+ − V−) 12.6 V Input Current ±10 mA Output Current 120 mA Voltage at Input/Output Pins V+ + 0.8V, V− − 0.8V ESD Tolerance (Human Body Model) 2 kV ESD Tolerance (Machine Model) 200 V Junction Temperature +150°C Soldering Temperature (Infrared/Convection, 20 sec) 235°C Soldering Temperature (Wave, 10 sec) 260°C Applications Variable attenuator AGC (Automatic Gain Control) Voltage-controlled filter Multiplier / four-quadrant multiplier Package Content 1 x LMH6503MA Wideband Variable Gain Amplifier 1 Circuit ±5V ±75mA SOIC-14 SMD DataSheet LMH6503MA

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