器件名称: AD7265BSU
功能描述: Differential Input, Dual 1 MSPS, 12-Bit, 3-Channel SAR ADC
文件大小: 706.58KB 共16页
简 介:Preliminary Technical Data
FEATURES
Dual 12-bit, 3-channel ADC Fast throughput rate: 1 MSPS Specified for VDD of 2.7 V to 5.25 V Low power: 7 mW max at 1 MSPS with 3 V supplies 16.5 mW max at 1 MSPS with 5 V supplies Wide input bandwidth 70 dB SNR at 100 kHz input frequency On-chip reference: 2.5 V –40°C to +125°C operation Flexible power/throughput rate management Simultaneous conversion/read No pipeline delays High speed serial interface SPI/QSPI/MICROWIRE/DSP compatible Shutdown mode: 1 A max 32-lead LFCSP and TQFP packages
Differential Input, Dual 1 MSPS, 12-Bit, 3-Channel SAR ADC AD7265
FUNCTIONAL BLOCK DIAGRAM
REF SELECT DcapA AVdd DVdd REF BUF
AD7265
12-BIT SUCCESSIVE APPROXIMATION ADC OUTPUT DRIVERS DOUTA
VA1 VA2 VA3 VA4 VA5 VA6 MUX T/H
SCLK +5 RANGE CONTROL LOGIC DIFF/SE A0 A1 A2 VDRIVE 12-BIT SUCCESSIVE APPROXIMATION ADC
V B1 V B2 V B3 V B4 V B5 V B6 OUTPUT DRIVERS
T/H MUX
DOUTB
GENERAL DESCRIPTION
The AD7265 is a dual, 12-bit, high speed, low power, successive approximation ADC that operates from a single 2.7 V to 5.25 V power supply and features throughput rates up to 1 MSPS. The device contains two ADCs, each preceded by a 3-channel multiplexer, and a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 10 MHz. The conversion process and data acquisition are controlled using standard control inputs, allowing easy interfacing to microprocessors or DSPs. The input signal is sampled on the falling edge of CS; conv……
