AD7812YN

更新时间： 2024-11-18 22:53:31

品牌	Logo	应用领域
亚德诺 - ADI		转换器光电二极管
页数	文件大小	规格书
19页	211K
描述
+2.7 V to +5.5 V, 350 kSPS, 10-Bit 4-/8-Channel Sampling ADCs

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数据手册
替代型号

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AD7812YN 数据手册

2.7 V to 5.5 V, 350 kSPS, 10-Bit

4-/8-Channel Sampling ADCs

AD7811/AD7812

The control registers of the AD7811 and AD7812 allow the

input channels to be configured as single-ended or pseudo

differential. The control register also features a software convert

start and a software power-down. Two of these devices can

share the same serial bus and may be individually addressed in

a multipackage application by hardwiring the device address pin.

The AD7811 is available in a small, 16-lead 0.3" wide, plastic

dual-in-line package (mini-DIP), in a 16-lead 0.15" wide, Small

Outline IC (SOIC) and in a 16-lead, Thin Shrink Small Out-

line Package (TSSOP). The AD7812 is available in a small,

20-lead 0.3" wide, plastic dual-in-line package (mini-DIP), in a

20-lead, Small Outline IC (SOIC) and in a 20-lead, Thin Shrink

Small Outline Package (TSSOP).

FEATURES

10-Bit ADC with 2.3 ␮s Conversion Time

The AD7811 has Four Single-Ended Inputs that

Can Be Configured as Three Pseudo Differential

Inputs with Respect to a Common, or as Two Inde-

pendent Pseudo Differential Channels

The AD7812 has Eight Single-Ended Inputs that Can

Be Configured as Seven Pseudo Differential Inputs

with Respect to a Common, or as Four Independent

Pseudo Differential Channels

Onboard Track and Hold

Onboard Reference 2.5 V ؎ 2.5%

Operating Supply Range: 2.7 V to 5.5 V

Specifications at 2.7 V–3.6 V and 5 V ؎ 10%

DSP-/Microcontroller-Compatible Serial Interface

High Speed Sampling and Automatic Power-Down Modes

Package Address Pin on the AD7811 and AD7812 Allows

Sharing of the Serial Bus in Multipackage Applications

Input Signal Range: 0 V to V_REF

PRODUCT HIGHLIGHTS

1. Low Power, Single Supply Operation

Both the AD7811 and AD7812 operate from a single 2.7 V

to 5.5 V supply and typically consume only 10 mW of power.

The power dissipation can be significantly reduced at

lower throughput rates by using the automatic power-

down mode e.g., 315 µW @ 10 kSPS, V_DD= 3 V—see

Power vs. Throughput.

Reference Input Range: 1.2 V to V_DD

GENERAL DESCRIPTION

The AD7811 and AD7812 are high speed, low power, 10-bit

A/D converters that operate from a single 2.7 V to 5.5 V supply.

The devices contain a 2.3 µs successive approximation A/D

converter, an on-chip track/hold amplifier, a 2.5 V on-chip refer-

ence and a high speed serial interface that is compatible with the

serial interfaces of most DSPs (Digital Signal Processors) and

microcontrollers. The user also has the option of using an exter-

nal reference by connecting it to the V_REFpin and setting the

EXTREF bit in the control register. The V_REFpin may be tied

to V_DD. At slower throughput rates the power-down mode may

be used to automatically power down between conversions.

2. 4-/8-Channel, 10-Bit ADC

The AD7811 and AD7812 have four and eight single-ended

input channels respectively. These inputs can be configured

as pseudo differential inputs by using the Control Register.

3. On-chip 2.5 V ( 2.5%) reference circuit that is powered

down when using an external reference.

4. Hardware and Software Control

The AD7811 and AD7812 provide for both hardware and

software control of Convert Start and Power-Down.

FUNCTIONAL BLOCK DIAGRAMS

REF

AGND

DGND

REF

AGND

DGND

REF

1.23V

REF

1.23V

REF

AD7812

AD7811

CLOCK

OSC

CLOCK

OSC

BUF

DOUT

DIN

DOUT

DIN

IN1

IN2

IN3

IN4

IN5

IN6

IN7

IN8

CHARGE

SERIAL

PORT

SERIAL

PORT

RFS

REDISTRIBUTION

DAC

REDISTRIBUTION

DAC

RFS

TFS

SCLK

MUX

IN1

IN2

IN3

IN4

MUX

CONTROL

LOGIC

CONTROL

LOGIC

COMP

CONVST

A0 CONVST

REV. B

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

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

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

Tel: 781/329-4700

Fax: 781/326-8703

World Wide Web Site: http://www.analog.com

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AD7812YN 替代型号

型号	品牌	替代类型	描述	数据表
AD7812YRUZ-REEL	ADI	完全替代	10-Bit, 8-Channel, 350 kSPS, Serial A/D Converter
AD7812YNZ	ADI	完全替代	10-Bit, 8-Channel, 350 kSPS, Serial A/D Converter
AD7812YRUZ	ADI	完全替代	2.7 V to 5.5 V, 350 kSPS, 10-Bit 4-/8-Channel Sampling ADCs

与AD7812YN相关器件

型号	品牌	获取价格	描述	数据表
AD7812YNZ	ADI	获取价格	10-Bit, 8-Channel, 350 kSPS, Serial A/D Converter
AD7812YR	ADI	获取价格	+2.7 V to +5.5 V, 350 kSPS, 10-Bit 4-/8-Channel Sampling ADCs
AD7812YR	ROCHESTER	获取价格	8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20, SOIC-20
AD7812YR-REEL	ADI	获取价格	IC 8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20, SOIC-20, Analog to Dig
AD7812YR-REEL7	ADI	获取价格	IC 8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20, SOIC-20, Analog to Dig
AD7812YRU	ADI	获取价格	+2.7 V to +5.5 V, 350 kSPS, 10-Bit 4-/8-Channel Sampling ADCs
AD7812YRU-REEL	ADI	获取价格	IC 8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20, TSSOP-20, Analog to Di
AD7812YRU-REEL	ROCHESTER	获取价格	8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20, TSSOP-20
AD7812YRU-REEL7	ADI	获取价格	10-Bit, 8-Channel, 350 kSPS, Serial A/D Converter
AD7812YRUZ	ROCHESTER	获取价格	8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20, TSSOP-20

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