AD603AQ
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Analog Devices Inc. AD603AQ

Manufacturer No:
AD603AQ
Manufacturer:
Analog Devices Inc.
Package:
Bulk
Description:
IC VARIABLE GAIN 1 CIRC 8CERDIP
Delivery:
Payment:
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Product Introduction

Overview

The AD603AQ, produced by Analog Devices Inc., is a low noise, voltage-controlled amplifier designed for use in RF and IF AGC (Automatic Gain Control) systems. This amplifier provides accurate, pin-selectable gains ranging from −11 dB to +31 dB with a bandwidth of 90 MHz, or from +9 dB to +51 dB with a bandwidth of 9 MHz. The AD603AQ features a patented proprietary circuit topology known as the X-AMP®, which includes a variable attenuator followed by a fixed-gain amplifier. This design ensures stable and linear gain control over temperature and supply variations.

Key Specifications

ParameterMinTypMaxUnit
Input Resistance97100103Ω
Input Capacitance2pF
Input Noise Spectral Density1.3nV/√Hz
Noise Figure (f = 10 MHz, gain = maximum, RS = 10 Ω)8.8dB
1 dB Compression Point (f = 10 MHz, gain = maximum, RS = 10 Ω)−11dBm
Peak Input Voltage±1.4±2V
−3 dB Bandwidth (VOUT = 100 mV rms)90MHz
Power Consumption (VS = ±5 V)125mW
Operating Temperature Range−40+85°C

Key Features

  • Linear-in-dB gain control with a scaling factor of 25 mV/dB.
  • Pin-selectable gains from −11 dB to +31 dB with a bandwidth of 90 MHz or +9 dB to +51 dB with a bandwidth of 9 MHz.
  • Low input noise spectral density of 1.3 nV/√Hz.
  • High impedance (50 MΩ) and low bias (200 nA) differential input.
  • Differential gain control interface supporting single-ended or differential control voltages.
  • Ability to drive load impedances as low as 100 Ω with low distortion.
  • Total harmonic distortion of −60 dBc for a ±1 V sinusoidal output at 10 MHz into a 500 Ω load.
  • Peak specified output of ±2.5 V minimum into a 500 Ω load.

Applications

  • RF/IF AGC amplifiers.
  • Video gain controls.
  • A/D range extensions.
  • Signal measurements.

Q & A

  1. What is the gain range of the AD603AQ? The AD603AQ provides gains from −11 dB to +31 dB with a bandwidth of 90 MHz, or from +9 dB to +51 dB with a bandwidth of 9 MHz.
  2. What is the input noise spectral density of the AD603AQ? The input noise spectral density is 1.3 nV/√Hz.
  3. How is the gain controlled in the AD603AQ? The gain is controlled through a high impedance (50 MΩ) differential input with a scaling factor of 25 mV/dB.
  4. What is the power consumption of the AD603AQ? The power consumption is 125 mW at the recommended ±5 V supplies.
  5. What is the operating temperature range of the AD603AQ? The operating temperature range is from −40°C to +85°C.
  6. Can the AD603AQ drive low impedance loads? Yes, the AD603AQ can drive load impedances as low as 100 Ω with low distortion.
  7. What is the total harmonic distortion of the AD603AQ? The total harmonic distortion is typically −60 dBc for a ±1 V sinusoidal output at 10 MHz into a 500 Ω load.
  8. What is the peak specified output of the AD603AQ? The peak specified output is ±2.5 V minimum into a 500 Ω load.
  9. Can multiple AD603AQ amplifiers be cascaded? Yes, several AD603AQ amplifiers can be cascaded and their gain control gains offset to optimize the system SNR.
  10. What is the proprietary circuit topology used in the AD603AQ? The AD603AQ uses the patented X-AMP® topology, which includes a variable attenuator followed by a fixed-gain amplifier.

Product Attributes

Amplifier Type:Variable Gain
Number of Circuits:1
Output Type:- 
Slew Rate:275V/µs
Gain Bandwidth Product:- 
-3db Bandwidth:90 MHz
Current - Input Bias:200 nA
Voltage - Input Offset:- 
Current - Supply:12.5mA
Current - Output / Channel:50 mA
Voltage - Supply Span (Min):9.5 V
Voltage - Supply Span (Max):12.6 V
Operating Temperature:-40°C ~ 85°C
Mounting Type:Through Hole
Package / Case:8-CDIP (0.300", 7.62mm)
Supplier Device Package:8-CERDIP
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Similar Products

Part Number AD603AQ AD603AR AD600AQ
Manufacturer Analog Devices Inc. Analog Devices Inc. Analog Devices Inc.
Product Status Active Obsolete Obsolete
Amplifier Type Variable Gain Variable Gain Variable Gain
Number of Circuits 1 1 2
Output Type - - -
Slew Rate 275V/µs 275V/µs 275V/µs
Gain Bandwidth Product - - -
-3db Bandwidth 90 MHz 90 MHz 35 MHz
Current - Input Bias 200 nA 200 nA 350 nA
Voltage - Input Offset - - -
Current - Supply 12.5mA 12.5mA 11mA (x2 Channels)
Current - Output / Channel 50 mA 50 mA 50 mA
Voltage - Supply Span (Min) 9.5 V 9.5 V 9.5 V
Voltage - Supply Span (Max) 12.6 V 12.6 V 10.5 V
Operating Temperature -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C
Mounting Type Through Hole Surface Mount Through Hole
Package / Case 8-CDIP (0.300", 7.62mm) 8-SOIC (0.154", 3.90mm Width) 16-CDIP (0.300", 7.62mm)
Supplier Device Package 8-CERDIP 8-SOIC 16-CERDIP

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