AD7265

更新时间： 2024-11-08 23:16:15

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
16页	706K
描述
Differential Input, Dual 1 MSPS, 12-Bit, 3-Channel SAR ADC

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AD7265 数据手册

Differential Input, Dual 1 MSPS,

12-Bit, 3-Channel SAR ADC

Preliminary Technical Data

AD7265

FUNCTIONAL BLOCK DIAGRAM

FEATURES

Dual 12-bit, 3-channel ADC

AVdd DVdd

REF SELECT

cap

Fast throughput rate: 1 MSPS

Specified for V_DDof 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

BUF

REF

AD7265

12-BIT

OUTPUT

DRIVERS

SUCCESSIVE

APPROXIMATION

ADC

T/H

OUT

MUX

70 dB SNR at 100 kHz input frequency

On-chip reference: 2.5 V

SCLK

–40°C to +125°C operation

RANGE

CONTROL

LOGIC

DIFF/SE

Flexible power/throughput rate management

Simultaneous conversion/read

No pipeline delays

High speed serial interface SPI®/QSPI™/MICROWIRE™/DSP

compatible

Shutdown mode: 1 µA max

DRIVE

12-BIT

SUCCESSIVE

APPROXIMATION

ADC

OUTPUT

DRIVERS

T/H

OUT

MUX

32-lead LFCSP and TQFP packages

BUF

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 multi-

plexer, and a low noise, wide bandwidth track-and-hold amplifier

that can handle input frequencies in excess of 10 MHz.

AGND AGND AGND

DGND

cap

Figure 1

PRODUCT HIGHLIGHTS

1. The AD7265 features two complete ADC functions that allow

simultaneous sampling and conversion of two channels. Each

ADC has 2 analog inputs, 3 fully differential pairs, or 6 single-

ended channels as programmed. The conversion result of both

channels is available simultaneously on separate data lines, or

in succession on one data line if only one serial port is

available.

The conversion process and data acquisition are controlled using

standard control inputs, allowing easy interfacing to microproces-

sors or DSPs. The input signal is sampled on the falling edge of

conversion is also initiated at this point. The conversion time is

;

determined by the SCLK frequency. There are no pipelined delays

associated with the part.

2. High Throughput with Low Power Consumption

The AD7265 offers a 1 MSPS throughput rate with ? mW

maximum power consumption when operating at 3 V.

The AD7265 uses advanced design techniques to achieve very low

power dissipation at high throughput rates. With 5 V supplies and a

1 MSPS throughput rate, the part consumes ? mA maximum. The

part also offers flexible power/throughput rate management when

operating in sleep mode.

3. Flexible Power/Throughput Rate Management

The conversion rate is determined by the serial clock, allowing

power consumption to be reduced as conversion time is re-

duced through an SCLK frequency increase. Power efficiency

can be maximized at lower throughput rates if the part enters

sleep between conversions.

The analog input range for the part can be selected to be a 0 V to

V_REFrange or a 2V_REFrange with either straight binary or twos

complement output coding. The AD7265 has an on-chip 2.5 V

reference that can be overdriven if an external reference is pre-

ferred. This external reference range is 100 mV to 2.5 V. The

AD7265 is available in 32-lead lead frame chip scale (LFCSP) and

thin flat quad (TQFP) lead package.

4. No Pipeline Delay

The part features two standard successive approximation

ADCs with accurate control of the sampling instant via a

input and once off conversion control.

Rev. PrA

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

registered trademarks 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

Fax: 781.326.8703

www.analog.com

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与AD7265相关器件

型号	品牌	获取价格	描述	数据表
AD7265ACP	ADI	获取价格	Differential Input, Dual 1 MSPS, 12-Bit, 3-Channel SAR ADC
AD7265ASU	ADI	获取价格	Differential Input, Dual 1 MSPS, 12-Bit, 3-Channel SAR ADC
AD7265BCP	ADI	获取价格	Differential Input, Dual 1 MSPS, 12-Bit, 3-Channel SAR ADC
AD7265BCP	ROCHESTER	获取价格	DUAL 3-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, QCC32, LEAD FREE, MO-220-VHH
AD7265BCPZ	ADI	获取价格	Differential/Single-Ended Input, Dual 1 MSPS, 12-Bit, 3-Channel SAR ADC
AD7265BCPZ	ROCHESTER	获取价格	DUAL 3-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, QCC32, LEAD FREE, MO-220-VHH
AD7265BCPZ-REEL	ADI	获取价格	Differential/Single-Ended Input, Dual 1 MSPS, 12-Bit, 3-Channel SAR ADC
AD7265BCPZ-REEL7	ADI	获取价格	Differential/Single-Ended Input, Dual 1 MSPS, 12-Bit, 3-Channel SAR ADC
AD7265BSU	ADI	获取价格	Differential Input, Dual 1 MSPS, 12-Bit, 3-Channel SAR ADC
AD7265BSUZ	ADI	获取价格	Differential/Single-Ended Input, Dual 1 MSPS, 12-Bit, 3-Channel SAR ADC

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