Analog Devices AD605
The AD605 is a low noise, accurate, dual channel, linear-in-dB variable gain amplifier, which is optimized for any application requiring high performance, wide bandwidth variable gain control. The high performance linear-in-dB response of the AD605 is achieved with the differential input, single supply, exponential amplifier (DSX-AMP) architecture. Each of the DSX-AMPs comprise a variable attenuator of 0 dB to –48.4 dB followed by a high speed fixed gain amplifier.
| Part No. |
AD605 |
| Datasheet |
AD605
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| Manufacturer |
 Analog Devices |
| Description |
Dual/ Low Noise/ Single-Supply Variable Gain Amplifier |
| Buy |
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FEATURES
Two Independent Linear-in-dB Channels Input Noise at Maximum Gain: 1.8 nV/ √Hz , 2.7 pA/√Hz Bandwidth: 40 MHz (–3 dB) Differential Input Absolute Gain Range Programmable: –14 dB to +34 dB (FBK Shorted to OUT) Through 0 dB to +48 dB (FBK Open) Variable Gain Scaling: 20 dB/V Through 40 dB/V Stable Gain with Temperature and Supply Variations Single-Ended Unipolar Gain Control Output Common-Mode Independently Set Power Shutdown at Lower End of Gain Control Single 5 V Supply Low Power: 90 mW/Channel Drives A/D Converters Directly APPLICATIONS
Ultrasound and Sonar Time-Gain Control High Performance AGC Systems Signal Measurement Dual, Low Noise, Single-Supply Variable Gain Amplifier AD605 FUNCTIONAL BLOCK DIAGRAM FIXED GAIN AMPLIFIER +34.4dB OUT FBK VGN GAIN CONTROL AND SCALING PRECISION PASSIVE INPUT ATTENUATOR VREF VOCM +IN –IN DIFFERENTIAL ATTENUATOR 0 TO –48.4dB AD605 GENERAL DESCRIPTION
m Operating from a single 5 V supply, the AD605 provides differential inputs and unipolar gain control for ease of use.
