AD574AJDZ Analog Devices Inc, AD574AJDZ Datasheet

ADC Single SAR 12-Bit Parallel 28-Pin SBCDIP

AD574AJDZ

Manufacturer Part Number

AD574AJDZ

Description

ADC Single SAR 12-Bit Parallel 28-Pin SBCDIP

Manufacturer

Analog Devices Inc

Datasheets

1.AD574AKNZ.pdf (12 pages)

2.AD574AJDZ.pdf (12 pages)

Specifications of AD574AJDZ

Package

28SBCDIP

Resolution

12 Bit

Architecture

SAR

Number Of Adcs

Number Of Analog Inputs

Digital Interface Type

Parallel

Input Type

Voltage

Polarity Of Input Voltage

Unipolar|Bipolar

Number Of Bits

Sampling Rate (per Second)

28.6k

Data Interface

Parallel

Number Of Converters

Power Dissipation (max)

725mW

Voltage Supply Source

Dual ±

Operating Temperature

0°C ~ 70°C

Mounting Type

Through Hole

Package / Case

28-CDIP (0.600", 15.24mm)

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

BOSTOCK HK LIMITED

Part Number:

AD574AJDZ

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Quantity:

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Company:

BOSTOCK HK LIMITED

Part Number:

AD574AJDZ

Manufacturer:

ADI

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PRODUCT DESCRIPTION

The AD574A is a complete 12-bit successive-approximation

analog-to-digital converter with 3-state output buffer circuitry

for direct interface to an 8- or 16-bit microprocessor bus. A high

precision voltage reference and clock are included on-chip, and

the circuit guarantees full-rated performance without external

circuitry or clock signals.

The AD574A design is implemented using Analog Devices’

Bipolar/I

tions on one chip. Offset, linearity and scaling errors are mini-

mized by active laser-trimming of thin-film resistors at the wafer

stage. The voltage reference uses an implanted buried Zener for

low noise and low drift. On the digital side, I

the successive-approximation register, control circuitry and

3-state output buffers.

The AD574A is available in six different grades. The AD574AJ,

K, and L grades are specified for operation over the 0 C to

+70 C temperature range. The AD574AS, T, and U are speci-

fied for the –55 C to +125 C range. All grades are available in a

28-pin hermetically-sealed ceramic DIP. Also, the J, K, and L

grades are available in a 28-pin plastic DIP and PLCC, and the

J and K grades are available in ceramic LCC.

The S, T, and U grades in ceramic DIP or LCC are available

with optional processing to MIL-STD-883C Class B; the T

and U grades are available as JAN QPL. The Analog Devices’

Military Products Databook should be consulted for details on

/883B testing of the AD574A.

*Protected by U.S. Patent Nos. 3,803,590; 4,213,806; 4,511,413; RE 28,633 .

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.

FEATURES

Complete 12-Bit A/D Converter with Reference

8- and 16-Bit Microprocessor Bus Interface

Guaranteed Linearity Over Temperature

No Missing Codes Over Temperature

35 s Maximum Conversion Time

Buried Zener Reference for Long-Term Stability

Ceramic DIP, Plastic DIP or PLCC Package

Available in Higher Speed, Pinout-Compatible Versions

Available in Versions Compliant with MIL-STD-883 and

and Clock

0 C to +70 C – AD574AJ, K, L

–55 C to +125 C – AD574AS, T, U

and Low Gain T.C. 10 ppm/ C max AD574AL

(15 s AD674B, 80 s AD774B; 10 s (with SHA) AD1674)

JAN QPL

L process, and integrates all analog and digital func-

12.5 ppm/ C max AD574AU

L logic is used for

PRODUCT HIGHLIGHTS

1. The AD574A interfaces to most 8- or 16-bit microproces-

2. The precision, laser-trimmed scaling and bipolar offset resis-

3. The internal buried Zener reference is trimmed to 10.00

4. AD674B (15 s) and AD774B (8 s) provide higher speed,

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

Tel: 617/329-4700

DATA MODE SELECT

REFERENCE INPUT

sors. Multiple-mode three-state output buffers connect di-

rectly to the data bus while the read and convert commands

are taken from the control bus. The 12 bits of output data

can be read either as one 12-bit word or as two 8-bit bytes

(one with 8 data bits, the other with 4 data bits and 4 trailing

zeros).

tors provide four calibrated ranges: 0 volts to +10 volts and 0

volts to +20 volts unipolar, –5 volts to +5 volts and –10 volts

to +10 volts bipolar. Typical bipolar offset and full-scale cali-

bration errors of 0.1% can be trimmed to zero with one ex-

ternal component each.

volts with 0.2% maximum error and 15 ppm/ C typical T.C.

The reference is available externally and can drive up to

1.5 mA beyond the requirements of the reference and bipolar

offset resistors.

pin compatibility; AD1674 (10 s) includes on-chip Sample-

Hold Amplifier (SHA).

ANALOG COMMON

+10V REFERENCE

BIPOLAR OFFSET

+12/+15V SUPPLY

BYTE ADDRESS/

-12/-15V SUPPLY

10V SPAN INPUT

20V SPAN INPUT

READ/CONVERT

SHORT CYCLE

CHIP ENABLE

CHIP SELECT

+5V SUPPLY

REF OUT

BIP OFF

REF IN

10V

20V

LOGIC

12/8

R/C

BLOCK DIAGRAM AND

19.95k

PIN CONFIGURATION

9.95k

10V

REF

12-Bit A/D Converter

CLOCK

AD574A

REF

DAC

CONTROL

4 x N x I

DAC

COMP

DAC

SAR

REF

AD574A*

MSB

LSB

Complete

Fax: 617/326-8703

DB9

STATUS

STS

DB11

MSB

DB10

DB8

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

LSB

DIGITAL COMMON

DIGITAL

DATA

OUTPUTS

Related parts for AD574AJDZ

AD574AJDZ Summary of contents

Page 1

FEATURES Complete 12-Bit A/D Converter with Reference and Clock 8- and 16-Bit Microprocessor Bus Interface Guaranteed Linearity Over Temperature +70 C – AD574AJ – +125 C – AD574AS Missing ...

AD574A–SPECIFICATIONS Model RESOLUTION LINEARITY ERROR @ + MIN MAX DIFFERENTIAL LINEARITY ERROR (Minimum Resolution for Which No Missing Codes are Guaranteed MIN MAX UNIPOLAR OFFSET (Adjustable to Zero) BIPOLAR OFFSET (Adjustable to Zero) ...

Page 3

Model RESOLUTION LINEARITY ERROR @ + MIN MAX DIFFERENTIAL LINEARITY ERROR (Minimum Resolution for Which No Missing Codes are Guaranteed MIN MAX UNIPOLAR OFFSET (Adjustable to Zero) BIPOLAR OFFSET (Adjustable to Zero) FULL-SCALE ...

Page 4

AD574A +5V SUPPLY DATA MODE SELECT CHIP SELECT BYTE ADDRESS/ SHORT CYCLE READ/CONVERT CHIP ENABLE +12/+15V SUPPLY +10V REFERENCE ANALOG COMMON REFERENCE INPUT -12/-15V SUPPLY BIPOLAR OFFSET 10V SPAN INPUT 20V SPAN INPUT ABSOLUTE MAXIMUM RATINGS* (Specifications apply to all ...

Page 5

THE AD574A OFFERS GUARANTEED MAXIMUM LINEARITY ERROR OVER THE FULL OPERATING TEMPERATURE RANGE DEFINITIONS OF SPECIFICATIONS LINEARITY ERROR Linearity error refers to the deviation of each individual code from a line drawn from “zero” through “full scale”. The point used ...

Page 6

AD574A CIRCUIT OPERATION The AD574A is a complete 12-bit A/D converter which requires no external components to provide the complete successive- approximation analog-to-digital conversion function. A block diagram of the AD574A is shown in Figure 1. +5V SUPPLY 1 V ...

Page 7

–V REF S AGND 100 10k 10k GAIN +15V 100pF R4 100k R1 100k A1 OFFSET AD585 R3 –15V 100 ...

Page 8

AD574A The full-scale trim is done by applying a signal 1 1/2 LSB below the nominal full scale (9.9963 for range). Trim R2 to give the last transition (1111 1111 1110 to 1111 1111 1111). BIPOLAR OPERATION ...

Page 9

Figure 7 shows a complete timing diagram for the AD574A con- vert start operation. R/C should be low before both CE and CS are asserted; if R/C is high, a read operation will momentarily occur, possibly resulting in system bus ...

Page 10

AD574A to valid logic levels after the conversion cycle is completed. The STS line goes high 600 ns after R/C goes low and returns low 300 ns after data is valid. If conversion is initiated by a high pulse as ...

Page 11

Figure 15. Z80—AD574A Interface Figure 16. Wait State Generator IBM PC Interface The AD574A appears in Figure 17 interfaced to the 4 MHz 8088 processor of an IBM PC. Since the device resides in I/O space, its address is decoded ...

Page 12

AD574A 28-Pin Ceramic DIP Package (D-28) 0.048 (1.21) 0.042 (1.07) 0.458 (11.63) 0.442 (11.23) 0.075 (1.91) REF 0.075 (1.91) REF OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 28-Terminal PLCC Package (P-28A) 0.180 (4.57) 0.165 (4.19) 0.048 (1.21) 0.056 (1.42) ...

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