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Product Detailed Parameters
- Description：IC IMAGE SGNL PROC 12BIT 48-LQFP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Type：Image Sensor
- Input Type：Logic
- Output Type：Logic
- Current - Supply：-
- Operating Temperature：-20°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：48-LQFP
- Supplier Device Package：48-LQFP (7x7)
- Grade：-
- Qualification：-
Download product information
Overview
The AD9821KST is a complete analog signal processor for imaging applications, featuring a single-channel architecture designed to sample and condition outputs from CMOS imagers and CCD arrays with on-chip Correlated Double Sampling. It integrates a differential input sample-and-hold amplifier, a digitally controlled variable gain amplifier (VGA) offering 0 dB to 36 dB range, an optical black clamp circuit, and a 12-bit ADC operating at up to 40 MSPS. The device operates from a single 3 V supply, dissipating 150 mW in normal operation, and is housed in a 48-lead LQFP package.
Feature Summary
- Integrates a differential input sample-and-hold amplifier, programmable VGA, optical black clamp, and 12-bit ADC.
- Features a 3-wire serial digital interface for internal register programming including gain and power-down modes.
- Includes low noise optical black clamp circuitry and analog preblanking function.
Applications
- Digital still cameras using CMOS imagers
- Industrial/Scientific imaging systems
Procurement Notes
Verify the specific suffix KST corresponds to the –20 °C to +85 °C temperature range and thin plastic ST-48 quad flatpack package. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors before procurement.
Selection Notes
Select this component for imaging applications requiring a complete analog front end without external Correlated Double Sampling. Ensure the sensor output fits within the 0 V to 1.8 V common-mode range and 1 V p-p amplitude limits. Verify compatibility with the 3 V single-supply requirement and 40 MHz maximum clock rate.
Part Context
The AD9821KST belongs to the AD9821 family of imaging signal processors manufactured by Analog Devices Inc. This series provides integrated solutions for conditioning image sensor data prior to digital processing.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation.
FAQ
What is the maximum clock rate for the AD9821?
The maximum clock rate is 40 MHz.
How is the VGA gain adjusted?
The VGA gain is adjusted via a 10-bit resolution setting through the 3-wire serial digital interface, providing a range from 0 dB to 36 dB.
What is the power consumption in standby mode?
The power consumption in standby mode is 5 mW.
