AD557

更新时间： 2024-11-05 22:49:59

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
4页	241K
描述
DACPORT, Low-Cost Complete mP-Compatible 8-Bit DAC

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AD557 数据手册

DACPORT, Low-Cost Complete

␮P-Compatible 8-Bit DAC

AD557

FUNCTIONAL BLOCK DIAGRAM

FEATURES

Complete 8-Bit DAC

Voltage Output—0 V to 2.56 V

Internal Precision Band-Gap Reference

Single-Supply Operation: +5 V (؎10%)

Full Microprocessor Interface

Fast: 1 ␮s Voltage Settling to ؎1/2 LSB

Low Power: 75 mW

No User Trims Required

Guaranteed Monotonic Over Temperature

All Errors Specified T_MINto T_MAX

Small 16-Pin DIP or 20-Pin PLCC Package

Low Cost

GENERAL DESCRIPTION

PRODUCT HIGHLIGHTS

The AD557 DACPORT® is a complete voltage-output 8-bit

digital-to-analog converter, including output amplifier, full

microprocessor interface and precision voltage reference on a

single monolithic chip. No external components or trims are

required to interface, with full accuracy, an 8-bit data bus to an

analog system.

1. The 8-bit I²L input register and fully microprocessor-

compatible control logic allow the AD557 to be directly con-

nected to 8- or 16-bit data buses and operated with standard

control signals. The latch may be disabled for direct DAC

interfacing.

2. The laser-trimmed on-chip SiCr thin-film resistors are cali-

brated for absolute accuracy and linearity at the factory.

Therefore, no user trims are necessary for full rated accuracy

over the operating temperature range.

The low cost and versatility of the AD557 DACPORT are the re-

sult of continued development in monolithic bipolar technologies.

The complete microprocessor interface and control logic is

implemented with integrated injection logic (I²L), an extremely

dense and low-power logic structure that is process-compatible

with linear bipolar fabrication. The internal precision voltage

reference is the patented low-voltage band-gap circuit which

permits full-accuracy performance on a single +5 V power sup-

ply. Thin-film silicon-chromium resistors provide the stability

required for guaranteed monotonic operation over the entire

operating temperature range, while laser-wafer trimming of

these thin-film resistors permits absolute calibration at the fac-

tory to within ±2.5 LSB; thus, no user-trims for gain or offset

are required. A new circuit design provides voltage settling to

±1/2 LSB for a full-scale step in 800 ns.

3. The inclusion of a precision low-voltage band-gap reference

eliminates the need to specify and apply a separate reference

source.

4. The AD557 is designed and specified to operate from a single

+4.5 V to +5.5 V power supply.

5. Low digital input currents, 100 µA max, minimize bus loading.

Input thresholds are TTL/low voltage CMOS compatible.

6. The single-chip, low power I²L design of the AD557 is inher-

ently more reliable than hybrid multichip or conventional

single-chip bipolar designs.

The AD557 is available in two package configurations. The

AD557JN is packaged in a 16-pin plastic, 0.3"-wide DIP. For

surface mount applications, the AD557JP is packaged in a

20-pin JEDEC standard PLCC. Both versions are specified over

the operating temperature range of 0°C to +70°C.

DACPORT is a registered trademark of Analog Devices, Inc.

Covered by U.S. Patent Nos. 3,887,863; 3,685,045; 4,323,795; other

patents pending.

REV. A

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: 617/329-4700

Fax: 617/326-8703

12 3 4

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与AD557相关器件

型号	品牌	获取价格	描述	数据表
AD557_01	ADI	获取价格	a DACPORT Low Cost, Complete uP-Compatible 8-Bit DAC
AD5570	ADI	获取价格	True Accuracy, 16-Bit 12 V/15 V, Serial Input Voltage Output DAC
AD5570ARS	ADI	获取价格	True Accuracy, 16-Bit 12 V/15 V, Serial Input Voltage Output DAC
AD5570ARS-REEL	ADI	获取价格	True Accuracy, 16-Bit 12 V/15 V, Serial Input Voltage Output DAC
AD5570ARS-REEL7	ADI	获取价格	True Accuracy, 16-Bit 12 V/15 V, Serial Input Voltage Output DAC
AD5570BRS	ADI	获取价格	True Accuracy, 16-Bit 12 V/15 V, Serial Input Voltage Output DAC
AD5570BRS-REEL	ADI	获取价格	True Accuracy, 16-Bit 12 V/15 V, Serial Input Voltage Output DAC
AD5570BRS-REEL7	ADI	获取价格	True Accuracy, 16-Bit 12 V/15 V, Serial Input Voltage Output DAC
AD5570BRSZ-REEL	ADI	获取价格	SERIAL INPUT LOADING, 12us SETTLING TIME, 16-BIT DAC, PDSO16, ROHS COMPLIANT, PLASTIC, MO-
AD5570BRSZ-REEL7	ADI	获取价格	True Accuracy, 16-Bit ±12 V/±15 V, Serial Inp

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