Differential Input, Dual, Simultaneous
Sampling, 4.2 MSPS, 14-Bit, SAR ADC
Data Sheet
AD7357
FEATURES
FUNCTIONAL BLOCK DIAGRAM
V
V
DRIVE
DD
Dual 14-bit SAR ADC
Simultaneous sampling
AD7357
V
V
INA+
Throughput rate: 4.2 MSPS per channel
Specified for a VDD of 2.5 V
14-BIT
SUCCESSIVE
APPROXIMATION
ADC
T/H
SDATA
INA–
A
REF
A
Power dissipation: 36 mW at 4.2 MSPS
On-chip reference: 2.048 V 0.25%, 6 ppm/°C
Dual conversion with read
BUF
SCLK
CS
CONTROL
LOGIC
REF
High speed serial interface
BUF
SPI-/QSPI-/MICROWIRE-/DSP-compatible
−40°C to +125°C Y grade operation, −40°C to +85°C B grade
operation
16-lead TSSOP and 18-lead LFCSP packages
Qualified for automotive applications
REF
V
B
14-BIT
SUCCESSIVE
APPROXIMATION
ADC
SDATA
B
INB+
INB–
T/H
V
AGND
AGND
REFGND
DGND
APPLICATIONS
Figure 1.
Automotive radar
Data acquisition systems
Motion control
I and Q demodulation
RFID readers
GENERAL DESCRIPTION
PRODUCT HIGHLIGHTS
The AD73571 is a dual, 14-bit, high speed, low power, successive
approximation analog-to-digital converter (ADC) that operates
from a single 2.5 V power supply and features throughput rates
up to 4.2 MSPS. The device contains two ADCs, each preceded
by a low noise, wide bandwidth track-and-hold circuit that can
handle input frequencies in excess of 110 MHz.
The conversion process and data acquisition use standard control
inputs allowing for easy interfacing to microprocessors or
digital signal processors (DSPs). The input signal is sampled on
1. Two Complete ADC Functions.
These functions allow simultaneous sampling and conversion
of two channels. The conversion result of both channels
is simultaneously available on separate data lines or in
succession on one data line if only one serial port is available.
2. High Throughput with Low Power Consumption.
The AD7357 offers a 4.2 MSPS throughput rate with 36 mW
power consumption.
3. Simultaneous Sampling.
The device features two standard successive approximation
ADCs with accurate control of the sampling instant via a
input and once off conversion control.
CS
the falling edge of ; a conversion is also initiated at this point.
CS
The conversion time is determined by the SCLK frequency.
The AD7357 uses advanced design techniques to achieve very
low power dissipation at high throughput rates. With a 2.5 V
supply and a 4.2 MSPS throughput rate, the device consumes
14 mA typically. The device also offers flexible power and
throughput rate management options.
Table 1. Related Devices
Generic Resolution Throughput Analog Input
AD7356
AD7352
AD7266
12-bit
12-bit
12-bit
5 MSPS
3 MSPS
2 MSPS
Differential
Differential
The analog input range for the device is the differential common
Differential/single-
ended
mode
VREF/2. The AD7357 has an on-chip 2.048 V reference
that can be overdriven when an external reference is preferred.
AD7866
AD7366
AD7367
12-bit
12-bit
14-bit
1 MSPS
1 MSPS
1 MSPS
Single-ended
Single-ended bipolar
Single-ended bipolar
The AD7357 is available in a 16-lead thin shrink small outline
package (TSSOP) and an 18-lead lead frame chip scale package
(LFCSP).
1 Protected by U.S. Patent No. 6,681,332.
Rev. E
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
rightsof third parties that may result fromits 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 andregisteredtrademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2009–2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
5秒后页面跳转
全球首块英伟达H200交付 黄仁勋“送货上门”
常用8脚开关电源芯片型号大全
74HC04芯片引脚图及功能、应用电路图讲解
CR6842芯片参数、引脚配置、应用电路图详解
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
