VCA810IDG4 ,High-Gain Adjustable Range, Wideband, Voltage-Controlled Amplifier 8-SOIC -40 to 85Block Diagram+5V61 VCA810V+8V-GainAdjust+ VX1OUT523VC0® -2V7-40dB® +40dB Gain-5V1An IMPORTANT NOTIC ..
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VCA810-VCA810AID-VCA810AIDG4-VCA810AIDR-VCA810ID-VCA810IDG4-VCA810IDR
High-Gain Adjustable Range, Wideband, Voltage-Controlled Amplifier 8-SOIC -40 to 85
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VCA810SBOS275G –JUNE 2003–REVISED DECEMBER 2015
VCA810 High Gain Adjust Range, Wideband and Variable Gain AmplifierOperating from ±5-V supplies, the device gain control
1 Featuresvoltage adjusts the gain from –40 dBata 0-V inputto High Gain Adjust Range: ±40 dB 40 dBata –2-V input. Increasing the control voltage• DifferentialIn, Single-Ended Out above ground attenuates the signal pathto greater
than 80 dB. Signal bandwidth and slew rate remain• Low Input Noise Voltage: 2.4 nV/√Hz
constant over the entire gain adjust range. This 40-• Constant Bandwidthvs Gain:35 MHz dB/V gain controlis accurate within ±1.5 dB (±0.9 dB• High dB/V Gain Linearity: ±0.3 dB for high grade), allowing the gain control voltageinan
AGC applicationto be used asa received signal• Gain Control Bandwidth:25 MHz
strength indicator (RSSI) with ±1.5-dB accuracy.• Low Output DC Error:< ±40 mV
Excellent common-mode rejection and common-• High Output Current: ±60 mA
mode input rangeat the two high-impedance inputs• Low Supply Current: 24.8 mA allow the device to providea differential receiver(Maximum for –40°Cto 85°C Temperature Range) operation with gain adjust. The output signal is
referencedto ground. Zero differential input voltage
2 Applications givesa 0-V output witha small DC offset error. Low
input noise voltage ensures good output SNRat the• Optical Receiver Time Gain Control
highest gain settings.• Sonar Systems applications where pulse edge information is• Voltage-Tunable Active Filters
critical, and the deviceis being used to equalize• Log Amplifiers varying channel loss, minimal changein group delay• Pulse Amplitude Compensation over gain setting retains excellent pulse edge
information.• AGC receivers With RSSI Improved Replacement for VCA610 An improved output stage provides adequate output
currentto drive the most demanding loads. Although
3 Description principally intended to drive analog-to-digital
converters (ADCs) or second-stage amplifiers, theThe VCA810 is a DC-coupled, wideband,
±60-mA output current easily drives doubly-continuously variable, voltage-controlled gain
terminated 50-Ω linesora passive post-filter stageamplifier. The device providesa differential inputto
over the ±1.7-V output voltage range.single-ended output conversion with a high-
impedance gain control input usedto vary the gain
Device Informationovera –40-dBto 40-dB range linearin dB/V.
Functional Block Diagram
