ADAR7251 - ADI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

ADAR7251
Manufacturer

ADI
ChipWorker Part#

CW1205244185
Description

4Channel, 16Bit, Continuous Time Data Acquisition ADC
Documentation

Datasheet

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ADAR7251 Specifications

Attribute	Attribute Value

Part Number	ADAR7251
Manufacturer	ADI
ChipWorker Part#	CW1205244185
Documentation	Datasheet
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Product Lifecycle Status	Active

Product Description

Product Details
The ADAR7251 is a 16-bit, 4-channel, simultaneous sampling analog-to-digital converter (ADC) designed especially for applications such as automotive LSR-FMCW or FSK-FMCW radar systems. Each of the four channels contains a low noise amplifier (LNA), a programmable gain amplifier (PGA), an equalizer, a multibit Σ-Δ ADC, and a decimation filter.
The front-end circuitry is designed to allow direct connection to an MMIC output with few external passive components. The ADAR7251 eliminates the need for a high order antialiasing filter, driver op amps, and external bipolar supplies. The ADAR7251 also offers precise channel-to-channel drift matching.
The ADAR7251 features an on-chip phase-locked loop (PLL) that allows a range of clock frequencies for flexibility in the system. The CONV_START input and DATA_READY output signals synchronize the ADC with an external ramp for applications such as FSK-FMCW radar.
The ADAR7251 supports serial and parallel interfaces at programmable sample rates from 300 kSPS to 1.8 MSPS, as well as easy connections to digital signal processors (DSPs) and microcontroller units (MCUs) in the system.
Applications
Automotive LSR systems
Data acquisition systems
### Features and Benefits
Low noise: 2.4 nV/√Hz input referred voltage noise at maximum gain setting
Wide input signal bandwidth: 500 kHz at 1.2 MSPS sample rate, 16-bit resolution
Additional sample rates supported: 300 kSPS, 450 kSPS, 600 kSPS, 900 kSPS, and 1.8 MSPS
4 differential simultaneous sampling channels
No active antialiasing filter required
LNA and PGA with 45 dB gain range in 6 dB steps
Selectable equalizer
Flexible data port supports serial or parallel mode
Supports FSK mode for FMCW radar systems
On-chip 1.5 V reference
Internal oscillator/PLL input: 16 MHz to 54 MHz High speed serial data interface
See datasheet for additional features

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