Datasheet > ADAR7251WBCSZ

ADAR7251WBCSZ

更新时间： 2024-09-24 14:49:07

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
73页	4174K
描述
4-Channel, 16-Bit, Continuous Time Data Acquisition ADC

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ADAR7251WBCSZ 数据手册

4-Channel, 16-Bit, Continuous Time

Data Acquisition ADC

Data Sheet

ADAR7251

FEATURES

GENERAL DESCRIPTION

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

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.

Internal oscillator/PLL input: 16 MHz to 54 MHz

High speed serial data interface

CONV_START

The

input and DATA_READY output signals

SPI control

synchronize the ADC with an external ramp for applications such

as FSK-FMCW radar.

2 general-purpose inputs/outputs

48-lead LFCSP_SS package

Temperature range: −40°C to +125°C

Single supply operation of 3.3 V

Qualified for automotive applications

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

Rev. 0

Document Feedback

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registeredtrademarks arethe property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Technical Support

www.analog.com

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