AD557JNZ Analog Devices Inc, AD557JNZ Datasheet

AD557JNZ

Manufacturer Part Number

AD557JNZ

Description

DAC 1-CH R-2R 8-Bit 16-Pin PDIP

Manufacturer

Analog Devices Inc

Series

DACPORT®r

Datasheets

1.AD557JNZ.pdf (6 pages)

2.AD557JNZ.pdf (6 pages)

Specifications of AD557JNZ

Package

16PDIP

Resolution

8 Bit

Conversion Rate

1.25 MSPS

Architecture

R-2R

Digital Interface Type

Parallel

Number Of Outputs Per Chip

Output Type

Voltage

Integral Nonlinearity Error

1 LSB

Maximum Settling Time

1.5 us

Settling Time

800ns

Number Of Bits

Data Interface

Parallel

Number Of Converters

Voltage Supply Source

Single Supply

Power Dissipation (max)

125mW

Operating Temperature

0°C ~ 70°C

Mounting Type

Through Hole

Package / Case

16-DIP (0.300", 7.62mm)

Resolution (bits)

8bit

Sampling Rate

1.25MSPS

Input Channel Type

Serial

Supply Voltage Range - Analog

4.5V To 5.5V

Supply Current

15mA

Digital Ic Case Style

DIP

No. Of Pins

Rohs Compliant

Yes

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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PRODUCT DESCRIPTION

The AD557 DACPORT

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.

The low cost and versatility of the AD557 DACPORT are the

result of continued development in monolithic bipolar technologies.

The complete microprocessor interface and control logic is

implemented with integrated injection logic (I

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 supply.

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 factory 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.

The AD557 is available in two package configurations. The

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

surface mount applications, the AD557JP is packaged in a

20-lead 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.

is a complete voltage-output 8-bit

L), an extremely

PRODUCT HIGHLIGHTS

1. The 8-bit I

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

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

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

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

6. The single-chip, low power I

GND

compatible control logic allow the AD557 to be directly

connected to 8- or 16-bit data buses and operated with stan-

dard control signals. The latch may be disabled for direct

DAC interfacing.

calibrated for absolute accuracy and linearity at the factory.

Therefore, no user trims are necessary for full rated accuracy

over the operating temperature range.

eliminates the need to specify and apply a separate reference

source.

single 4.5 V to 5.5 V power supply.

Input thresholds are TTL/low voltage CMOS compatible.

ently more reliable than hybrid multichip or conventional

single-chip bipolar designs.

DACPORT Low Cost, Complete

CONTROL

INPUTS

AD557

CS CE

LOGIC

CONTROL

AMP

FUNCTIONAL BLOCK DIAGRAM

LSB

L input register and fully microprocessor-

P-Compatible 8-Bit DAC

(MSB)

BIT1

DIGITAL INPUT DATA (BUS)

8-BIT VOLTAGE-SWITCHING

D-TO-A CONVERTER

REFERENCE

L LATCHES

BAND-GAP

L design of the AD557 is inher-

(LSB)

BIT8

MSB

AD557

OUTPUT

+ V

AMP

GND

OUT

SENSE A

SENSE B

Related parts for AD557JNZ

AD557JNZ Summary of contents

Page 1

PRODUCT DESCRIPTION ® 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 ...

Page 2

AD557–SPECIFICATIONS Model Min RESOLUTION RELATIVE ACCURACY 0°C to 70°C OUTPUT Ranges Current Source 5 Sink 3 OUTPUT SETTLING TIME 4 FULL-SCALE ACCURACY @ 25° MIN MAX ZERO ERROR @ 25° MIN MAX 5 MONOTONICITY ...

Page 3

CIRCUIT DESCRIPTION The AD557 consists of four major functional blocks fabricated on a single monolithic chip (see Figure 1). The main D/A con- verter section uses eight equally weighted laser-trimmed current sources switched into a silicon-chromium thin-film R/2R resistor ladder ...

Page 4

AD557 APPLICATIONS Grounding and Bypassing All precision converter products require careful application of good grounding practices to maintain full rated performance. Because the AD557 is intended for application in microcom- puter systems where digital noise is prevalent, special care must ...

Page 5

OUTLINE DIMENSIONS Dimensions shown in inches and (mm). N-16 (Plastic) Package 0.87 (22.1) MAX 0.25 0.31 (6.35) (7.87) 0.035 (0.59) 0.18 0.125 (4.57) (3.18) MIN 0.018 0.1 0.033 (0.46) (2.54) (0.84) P-20A (PLCC) Package 0.173 (4.385 0.390 0.005 SQ (9.906 ...

Page 6

AD557–Revision History Location Data sheet changed from REV REV. B. Changes to MONOTONICITY section of spec. page . . . . . . . . . 2 Page ...

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