AD603
PRODUCTIONLow Noise, 90 MHz Variable Gain Amplifier
- Part Models
- 7
- 1ku List Price
- Starting From $9.35
Part Details
- Linear-in-dB gain control
- Pin-programmable gain ranges
−11 dB to +31 dB with 90 MHz bandwidth
9 dB to 51 dB with 9 MHz bandwidth - Any intermediate range, for example −1 dB to +41 dB with 30 MHz bandwidth
- Bandwidth independent of variable gain
- 1.3 nV/√Hz input noise spectral density
- ±0.5 dB typical gain accuracy
The AD603 is a low noise, voltage-controlled amplifier for use in RF and IF AGC systems. It provides accurate, pin-selectable gains of −11 dB to +31 dB with a bandwidth of 90 MHz or +9 dB to 51+ dB with a bandwidth of 9 MHz. Any intermediate gain range may be arranged using one external resistor. The input referred noise spectral density is only 1.3 nV/√Hz, and power consumption is 125 mW at the recommended ±5 V supplies.
The decibel gain is linear in dB, accurately calibrated, and stable over temperature and supply. The gain is controlled at a high impedance (50 MΩ), low bias (200 nA) differential input; the scaling is 25 mV/dB, requiring a gain control voltage of only 1 V to span the central 40 dB of the gain range. An overrange and underrange of 1 dB is provided whatever the selected range. The gain control response time is less than 1 μs for a 40 dB change.
The differential gain control interface allows the use of either differential or single-ended positive or negative control voltages. Several of these amplifiers may be cascaded and their gain control gains offset to optimize the system SNR.
The AD603 can drive a load impedance as low as 100 Ω with low distortion. For a 500 Ω load in shunt with 5 pF, the total harmonic distortion for a ±1 V sinusoidal output at 10 MHz is typically −60 dBc. The peak specified output is ±2.5 V minimum into a 500 Ω load.
The AD603 uses a patented proprietary circuit topology—the X-AMP®. The X-AMP comprises a variable attenuator of 0 dB to −42.14 dB followed by a fixed-gain amplifier. Because of the attenuator, the amplifier never has to cope with large inputs and can use negative feedback to define its (fixed) gain and dynamic performance. The attenuator has an input resistance of 100 Ω, laser trimmed to ±3%, and comprises a 7-stage R-2R ladder network, resulting in an attenuation between tap points of 6.021 dB. A proprietary interpolation technique provides a continuous gain control function that is linear in dB.
The AD603 is specified for operation from −40°C to +85°C.
Applications
- RF/IF AGC amplifiers
- Video gain controls
- A/D range extensions
- Signal measurements
Documentation
Data Sheet 2
Application Note 1
Frequently Asked Question 1
Product Selection Guide 1
Tutorial 1
Analog Dialogue 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| 5962-9457203MPA | 8-Lead CerDIP | ||
| AD603ACHIPS | none available | ||
| AD603AQ | 8-Lead CerDIP | ||
| AD603ARZ | 8-Lead SOIC | ||
| AD603ARZ-REEL | 8-Lead SOIC | ||
| AD603ARZ-REEL7 | 8-Lead SOIC | ||
| AD603SQ/883B | 8-Lead CerDIP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 9, 2018 - 16_0026 Qualify TeamQuest Technology, Inc. for Burn-in and Life Test of Military and Aerospace Devices |
||
| 5962-9457203MPA | ||
| AD603SQ/883B | ||
|
Nov 7, 2012 - 12_0199 Qualification of New Conductive Silver-Filled Glass Die Attach Adhesive for Cerdip and Ceramic Flatpack (Cerpack) Packages. |
||
| 5962-9457203MPA | ||
| AD603AQ | ||
| AD603SQ/883B | ||
|
Jun 6, 2012 - 12_0066 Add capacity for Burn In of Hermetic, 883 & QMLQ/Class B devices at TSSI Cavite |
||
| 5962-9457203MPA | ||
| AD603AQ | ||
| AD603SQ/883B | ||
|
Nov 9, 2011 - 11_0050 Transfer of ADI Hermetics Assembly location from Paranaque, Manila to General Trias, Cavite Philippines |
||
| 5962-9457203MPA | ||
| AD603AQ | ||
| AD603SQ/883B | ||
|
Nov 9, 2011 - 11_0182 Test Site Transfer from Analog Devices Philippines Inc in Paranaque to Analog Devices General Trias in Cavite, Philippines |
||
| 5962-9457203MPA | ||
| AD603AQ | ||
| AD603SQ/883B | ||
|
Oct 14, 2015 - 15_0200 Addition of a Polyimide Layer for AD603 |
||
| AD603ARZ | PRODUCTION | |
| AD603ARZ-REEL | PRODUCTION | |
| AD603ARZ-REEL7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Tools & Simulations
AD603 SPICE Macro Models 2
- AD603 SPICE Macro Model Rev. A, 12/94
- AD603A SPICE Macro Model Rev. A, 12/94
ADIsimRF
ADIsimRF is an easy-to-use RF signal chain calculator. Cascaded gain, noise, distortion and power consumption can be calculated, plotted and exported for signal chains with up to 50 stages. ADIsimRF also includes an extensive data base of device models for ADI’s RF and mixed signal components.
Open ToolEvaluation Kits
AD603 Evaluation Board