AD7892 datasheet, PDF - EEWORLD Datasheet

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AD7892: Description1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PDSO24; Categorysemiconductor logic; File Size144KB，14 Pages; ManufacturerADI; Websitehttps://www.analog.com

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AD7892 Overview

1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PDSO24

AD7892 Parametric

Parameter Name	Attribute value
Number of functions	1
Number of terminals	24
Maximum operating temperature	85 Cel
Minimum operating temperature	-40 Cel
Rated supply voltage	5 V
Maximum conversion time	1.6 uS
Maximum linear error	0.0366 %
Maximum limit analog input voltage	10 V
Minimum limit analog input voltage	-10 V
Processing package description	SOIC-24
state	ACTIVE
Craftsmanship	CMOS
packaging shape	Rectangle
Package Size	SMALL OUTLINE
surface mount	Yes
Terminal form	GULL WING
Terminal spacing	1.27 mm
terminal coating	tin lead
Terminal location	pair
Packaging Materials	Plastic/Epoxy
Temperature level	INDUSTRIAL
Sampling Rate	0.5000 MHz
Output format	SERIAL, PARALLEL, WORD
Type of converter	continuous approximation
Number of digits	12
Output bit encoding	2S Supplementary Binary
Number of analog channels	1
Sample and hold and track and hold	TRACK

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FEATURES

Fast 12-Bit ADC with 1.47 s Conversion Time

600 kSPS Throughput Rate (AD7892-3)

500 kSPS Throughput Rate (AD7892-1, AD7892-2)

Single Supply Operation

On-Chip Track/Hold Amplifier

Selection of Input Ranges:

10 V or 5 V for AD7892-1

0 V to +2.5 V for AD7892-2

2.5 V for AD7892-3

High Speed Serial and Parallel Interface

Low Power, 60 mW typ

Overvoltage Protection on Analog Inputs (AD7892-1

and AD7892-3)

MOS Single Supply,

12-Bit 600 kSPS ADC

AD7892

FUNCTIONAL BLOCK DIAGRAM

REF OUT/REF IN

+2.5V

REFERENCE

DB0

DB2

DB3/RFS

12-BIT

IN1

IN2

ADC

SIGNAL

SCALING

TRACK/HOLD

CLOCK

CONTROL LOGIC

DB4/SCLK

DB5/SDATA

DB10/LOW

DB11/LOW

AD7892

MODE

EOC CONVST

AGND DGND

STANDBY

GENERAL DESCRIPTION

The AD7892 is a high speed, low power, 12-bit A/D converter

that operates from a single +5 V supply. The part contains a

1.47

µs

successive approximation ADC, an on-chip track/hold

amplifier, an internal +2.5 V reference and on-chip versatile

interface structures that allow both serial and parallel connec-

tion to a microprocessor. The part accepts an analog input range

10 V or

5 V (AD7892-1), 0 V to +2.5 V (AD7892-2) and

2.5 V (AD7892-3). Overvoltage protection on the analog inputs

for the AD7892-1 and AD7892-3 allows the input voltage to go

17 V or

7 V respectively without damaging the ports.

The AD7892 offers a choice of two data output formats: a

single, parallel, 12-bit word or serial data. Fast bus access times

and standard control inputs ensure easy parallel interface to

microprocessors and digital signal processors. A high speed

serial interface allows direct connection to the serial ports of

microcontrollers and digital signal processors.

In addition to the traditional dc accuracy specifications such as

linearity, full-scale and offset errors, the part is also specified for

dynamic performance parameters including harmonic distortion

and signal-to-noise ratio.

The AD7892 is fabricated in Analog Devices’ Linear Compat-

ible CMOS (LC

MOS) process, a mixed technology process

that combines precision bipolar circuits with low power CMOS

logic. It is available in a 24-lead, 0.3" wide, plastic or hermetic

DIP or in a 24-lead SOIC.

PRODUCT HIGHLIGHTS

1. The AD7892-3 features a conversion time of 1.47

µs

and a

track/hold acquisition time of 200 ns. This allows a through-

put rate for the part up to 600 kSPS. The AD7892-1 and

AD7892-2 operate with throughput rates of 500 kSPS.

2. The AD7892 operates from a single +5 V supply and con-

sumes 60 mW typ making it ideal for low power and portable

applications.

3. The part offers a high speed, flexible interface arrangement

with parallel and serial interfaces for easy connection to

microprocessors, microcontrollers and digital signal

processors.

REV. C

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

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

Fax: 781/326-8703

AD7892 Related Products

	AD7892	5962-9684601QJA	AD7892ACHIPS-3	EVAL-AD7892-3CB
Description	1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PDSO24	1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PDSO24	1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PDSO24	1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PDSO24
Number of functions	1	1	1	1
Number of terminals	24	24	24	24
Maximum operating temperature	85 Cel	85 Cel	85 Cel	85 Cel
Minimum operating temperature	-40 Cel	-40 Cel	-40 Cel	-40 Cel
Rated supply voltage	5 V	5 V	5 V	5 V
Maximum conversion time	1.6 uS	1.6 uS	1.6 uS	1.6 uS
Maximum linear error	0.0366 %	0.0366 %	0.0366 %	0.0366 %
Maximum limit analog input voltage	10 V	10 V	10 V	10 V
Minimum limit analog input voltage	-10 V	-10 V	-10 V	-10 V
Processing package description	SOIC-24	SOIC-24	SOIC-24	SOIC-24
state	ACTIVE	ACTIVE	ACTIVE	ACTIVE
Craftsmanship	CMOS	CMOS	CMOS	CMOS
packaging shape	Rectangle	Rectangle	Rectangle	Rectangle
Package Size	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE
surface mount	Yes	Yes	Yes	Yes
Terminal form	GULL WING	GULL WING	GULL WING	GULL WING
Terminal spacing	1.27 mm	1.27 mm	1.27 mm	1.27 mm
terminal coating	tin lead	tin lead	tin lead	tin lead
Terminal location	pair	pair	pair	pair
Packaging Materials	Plastic/Epoxy	Plastic/Epoxy	Plastic/Epoxy	Plastic/Epoxy
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Sampling Rate	0.5000 MHz	0.5000 MHz	0.5000 MHz	0.5000 MHz
Output format	SERIAL, PARALLEL, WORD	SERIAL, PARALLEL, WORD	SERIAL, PARALLEL, WORD	SERIAL, PARALLEL, WORD
Type of converter	continuous approximation	continuous approximation	continuous approximation	continuous approximation
Number of digits	12	12	12	12
Output bit encoding	2S Supplementary Binary	2S Supplementary Binary	2S Supplementary Binary	2S Supplementary Binary
Number of analog channels	1	1	1	1
Sample and hold and track and hold	TRACK	TRACK	TRACK	TRACK

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