VCA824

활성

광대역 420MHz, >40dB 게인 조정 범위, 선형 입력 V/V 가변 게인 증폭기

지금 주문

데이터 시트

document-pdfAcrobat VCA824 Ultra-Wideband, > 40-dB Gain Adjust Range, Linear in V/V Variable Gain Amplifier datasheet (Rev. E) (영어) PDF | HTML

VCA824

활성

데이터 시트

지금 주문

제품 상세 정보

PGA/VGA

VGA

Number of channels

1

Vs (min) (V)

8

Vs (max) (V)

12

BW at Acl (MHz)

710

Acl, min spec gain (V/V)

2

Features

Analog Gain Set, Differential to Single-ended conversion

Slew rate (typ) (V/µs)

2500

Iq per channel (typ) (mA)

36.5

Gain (max) (dB)

40

Rating

Catalog

Operating temperature range (°C)

-40 to 85

PGA/VGA

VGA

Number of channels

1

Vs (min) (V)

8

Vs (max) (V)

12

BW at Acl (MHz)

710

Acl, min spec gain (V/V)

2

Features

Analog Gain Set, Differential to Single-ended conversion

Slew rate (typ) (V/µs)

2500

Iq per channel (typ) (mA)

36.5

Gain (max) (dB)

40

Rating

Catalog

Operating temperature range (°C)

-40 to 85

SOIC (D)

14

51.9 mm² 8.65 x 6

VSSOP (DGS)

10

14.7 mm² 3 x 4.9

710-MHz Small-Signal Bandwidth (G = 2 V/V)
320 MHz, 4-V_PP Bandwidth (G = 10 V/V)
0.1-dB Gain Flatness to 135 MHz
2500-V/µs Slew Rate
> 40-dB Gain Adjust Range
High Gain Accuracy: 20-dB ±0.3-dB
High Output Current: ±90 mA

710-MHz Small-Signal Bandwidth (G = 2 V/V)
320 MHz, 4-V_PP Bandwidth (G = 10 V/V)
0.1-dB Gain Flatness to 135 MHz
2500-V/µs Slew Rate
> 40-dB Gain Adjust Range
High Gain Accuracy: 20-dB ±0.3-dB
High Output Current: ±90 mA

The VCA824 is a DC-coupled, wideband, linear-in V/V, continuously variable, voltage-controlled gain amplifier. The device 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 (R_G) and feedback resistor (R_F).

The VCA824 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 40 V/V. Operating from ±5-V supplies, the gain control voltage for the VCA824 adjusts the gain linearly in V/V as the control voltage varies from 1 V to –1 V. For example, set for a maximum gain of 10 V/V, the VCA824 provides 10 V/V, at 1-V input, to 0.1 V/V at –1-V input of gain control range. The VCA824 offers excellent gain linearity. For a 20-dB maximum gain, and a gain-control input voltage varying between 0 V and 1 V, the gain does not deviate by more than ±0.3-dB (maximum at 25°C).

The VCA824 is a DC-coupled, wideband, linear-in V/V, continuously variable, voltage-controlled gain amplifier. The device 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 (R_G) and feedback resistor (R_F).

The VCA824 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 40 V/V. Operating from ±5-V supplies, the gain control voltage for the VCA824 adjusts the gain linearly in V/V as the control voltage varies from 1 V to –1 V. For example, set for a maximum gain of 10 V/V, the VCA824 provides 10 V/V, at 1-V input, to 0.1 V/V at –1-V input of gain control range. The VCA824 offers excellent gain linearity. For a 20-dB maximum gain, and a gain-control input voltage varying between 0 V and 1 V, the gain does not deviate by more than ±0.3-dB (maximum at 25°C).

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