VCA820 Series

150MHz BW with linear in dB gain control variable gain amplifier

Catalog

150MHz BW with linear in dB gain control variable gain amplifier

Part	Current - Supply	Voltage - Supply Span (Min) [Min]	Voltage - Supply Span (Max) [Max]	Package / Case [x]	Package / Case [y]	Package / Case	Mounting Type	Number of Circuits	Slew Rate	-3db Bandwidth	Voltage - Input Offset	Operating Temperature [Max]	Operating Temperature [Min]	Current - Input Bias	Current - Output / Channel [custom]	Supplier Device Package	Package / Case [x]	Package / Case [x]
Texas Instruments VCA820ID	34 mA	7 V	12 V	0.154 in	3.9 mm	14-SOIC	Surface Mount	1	1700 V/µs	168 MHz	4 mV	85 °C	-40 °C	19 µA	160 mA
Texas Instruments VCA820IDGSR	34 mA	7 V	12 V			10-MSOP 10-TFSOP	Surface Mount	1	1700 V/µs	168 MHz	4 mV	85 °C	-40 °C	19 µA	160 mA	10-VSSOP	3 mm	0.118 in
Texas Instruments VCA820IDGST	34 mA	7 V	12 V			10-MSOP 10-TFSOP	Surface Mount	1	1700 V/µs	168 MHz	4 mV	85 °C	-40 °C	19 µA	160 mA	10-VSSOP	3 mm	0.118 in

Catalog

150MHz BW with linear in dB gain control variable gain amplifier

Key Features

• 150-MHz Small-Signal Bandwidth137-MHz, 5-VPPBandwidth (G = +10 V/V)0.1-dB Gain Flatness to 28 MHz1700-V/µs Slew Rate> 40-dB Gain Adjust RangeHigh Gain Accuracy: 20 dB ±0.4dBHigh Output Current: 160 mAAPPLICATIONSAGC Receivers With RSSIDifferential Line ReceiversPulse Amplitude CompensationVariable AttenuatorsAll other trademarks are the property of their respective owners150-MHz Small-Signal Bandwidth137-MHz, 5-VPPBandwidth (G = +10 V/V)0.1-dB Gain Flatness to 28 MHz1700-V/µs Slew Rate> 40-dB Gain Adjust RangeHigh Gain Accuracy: 20 dB ±0.4dBHigh Output Current: 160 mAAPPLICATIONSAGC Receivers With RSSIDifferential Line ReceiversPulse Amplitude CompensationVariable AttenuatorsAll other trademarks are the property of their respective owners

Description

The VCA820 is a dc-coupled, wideband, linear in dB, continuously variable, voltage-controlled gain amplifier. The VCA820 provides a differential input to single-ended conversion with a high-impedance gain control input, used to vary the gain down 40 dB from the nominal maximum gain set by the gain resistor (RG) and feedback resistor (RF). The VCA820 internal architecture consists of two input buffers and an output current feedback amplifier stage, integrated with a multiplier core to provide a complete variable gain amplifier (VGA) system that does not require external buffering. The maximum gain is set externally with two resistors, providing flexibility in designs. The maximum gain is intended to be set between +2 V/V and +100 V/V. Operating from ±5-V supplies, the gain control voltage for the VCA820 adjusts the gain linearly in dB as the control voltage varies from 0 V to +2 V. For example, set for a maximum gain of +10 V/V, the VCA820 provides 20 dB, at +2-V input, to –20 dB at 0-V input of gain control range. The VCA820 offers excellent gain linearity. For a 20-dB maximum gain, and a gain-control input voltage varying between 1 V and 2 V, the gain does not deviate by more than ±0.4dB (maximum at +25°C). The VCA820 is a dc-coupled, wideband, linear in dB, continuously variable, voltage-controlled gain amplifier. The VCA820 provides a differential input to single-ended conversion with a high-impedance gain control input, used to vary the gain down 40 dB from the nominal maximum gain set by the gain resistor (RG) and feedback resistor (RF). The VCA820 internal architecture consists of two input buffers and an output current feedback amplifier stage, integrated with a multiplier core to provide a complete variable gain amplifier (VGA) system that does not require external buffering. The maximum gain is set externally with two resistors, providing flexibility in designs. The maximum gain is intended to be set between +2 V/V and +100 V/V. Operating from ±5-V supplies, the gain control voltage for the VCA820 adjusts the gain linearly in dB as the control voltage varies from 0 V to +2 V. For example, set for a maximum gain of +10 V/V, the VCA820 provides 20 dB, at +2-V input, to –20 dB at 0-V input of gain control range. The VCA820 offers excellent gain linearity. For a 20-dB maximum gain, and a gain-control input voltage varying between 1 V and 2 V, the gain does not deviate by more than ±0.4dB (maximum at +25°C).