AD558K AD [Analog Devices], AD558K Datasheet

AD558K

Manufacturer Part Number

AD558K

Description

DACPORT Low Cost, Complete uP-Compatible 8-Bit DAC

Manufacturer

AD [Analog Devices]

Datasheet

1.AD558K.pdf (8 pages)

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Download datasheet (337Kb)

PRODUCT DESCRIPTION

The AD558 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.

The performance and versatility of the DACPORT is a result of

several recently-developed monolithic bipolar technologies. The

complete microprocessor interface and control logic is imple-

mented with integrated injection logic (I

and low power logic structure that is process-compatible with

linear bipolar fabrication. The internal precision voltage reference

is the patented low voltage bandgap circuit which permits full-

accuracy performance on a single +5 V to +15 V power supply.

Thin-film silicon-chromium resistors provide the stability re-

quired for guaranteed monotonic operation over the entire oper-

ating temperature range (all grades), while recent advances in

laser-wafer-trimming of these thin-film resistors permit absolute

calibration at the factory to within 1 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 AD558 is available in four performance grades. The AD558J

and K are specified for use over the 0 C to +70 C temperature

range, while the AD558S and T grades are specified for –55 C

to +125 C operation. The “J” and “K” grades are available

either in 16-pin plastic (N) or hermetic ceramic (D) DIPS.

They are also available in 20-pin JEDEC standard PLCC pack-

ages. The “S” and “T” grades are available in the 16-pin her-

metic ceramic DIP package.

*Protected by U.S. Patent Nos. 3,887,863; 3,685,045; 4,323,795; Patents

DACPORT is a registered trademark of Analog Devices, Inc.

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.

Pending.

FEATURES

Complete 8-Bit DAC

Voltage Output–2 Calibrated Ranges

Internal Precision Bandgap Reference

Single-Supply Operation: +5 V to +15 V

Full Microprocessor Interface

Fast: 1 s Voltage Settling to

Low Power: 75 mW

No User Trims

Guaranteed Monotonic Over Temperature

All Errors Specified T

Small 16-Pin DIP and 20-Pin PLCC Packages

Single Laser-Wafer-Trimmed Chip for Hybrids

Low Cost

MIL-STD-883 Compliant Versions Available

MIN

to T

MAX

1/2 LSB

L), an extremely dense

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 bandgap reference

4. The voltage switching structure of the AD558 DAC section

5. The AD558 is designed and specified to operate from a

6. Low digital input currents, 100 A max, minimize bus load-

7. All AD558 grades are available in chip form with guaranteed

8. The AD558 is available in versions compliant with MIL-

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

Tel: 617/329-4700

GND

compatible control logic allow the AD558 to be directly

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

standard 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 refer-

ence source.

along with a high speed output amplifier and laser trimmed

resistors give the user a choice of 0 V to +2.56 V or 0 V to

+10 V output ranges, selectable by pin-strapping. Circuitry is

internally compensated for minimum settling time on both

ranges; typically settling to 1/2 LSB for a full-scale 2.55 volt

step in 800 ns.

single +4.5 V to +16.5 V power supply.

ing. Input thresholds are TTL/low voltage CMOS compat-

ible over the entire operating V

specifications from +25 C to T

visual inspection is standard on Analog Devices bipolar

chips. Contact the factory for additional chip information.

STD-883. Refer to Analog Devices Military Products Data-

book or current AD558/883B data sheet for detailed

specifications.

DACPORT Low Cost, Complete

CONTROL

CS CE LSB

INPUTS

LOGIC

CONTROL

AD558

AMP

FUNCTIONAL BLOCK DIAGRAM

LSB

L input register and fully microprocessor-

P-Compatible 8-Bit DAC

8-BIT VOLTAGE-SWITCHING

DIGITAL INPUT DATA (BUS)

D-TO-A CONVERTER

REFERENCE

BAND -

L LATCHES

GAP

MAX

range.

MSB

. MIL-STD-883, Class B

MSB

OUTPUT

AD558*

AMP

Fax: 617/326-8703

GND

OUT

SENSE A

SELECT

Related parts for AD558K

AD558K Summary of contents

Page 1

FEATURES Complete 8-Bit DAC Voltage Output–2 Calibrated Ranges Internal Precision Bandgap Reference Single-Supply Operation +15 V Full Microprocessor Interface Fast Voltage Settling to Low Power User Trims Guaranteed Monotonic Over Temperature ...

Page 2

... A monotonic converter has a maximum differential linearity error of 1 LSB. 8 See Figure 7. Specifications shown in boldface are tested on all production units at final electrical test. Specifications subject to change without notice + +15 V unless otherwise noted AD558J AD558K Typ Max Min Typ Max 8 8 1/2 1 +2.56 ...

Page 3

... C to +70 C AD558JP +70 C AD558JD +70 C AD558KN +70 C AD558KP +70 C AD558KD +70 C AD558SD – +125 C AD558TD – +125 C NOTES 1 For details on grade and package offerings screened in accordance with MIL-STD-883, refer to the Analog Devices Military Products Databook or current AD558/883B data sheet. ...

Page 4

AD558 CIRCUIT DESCRIPTION The AD558 consists of four major functional blocks, fabricated on a single monolithic chip (see Figure 2). The main D-to-A converter section uses eight equally-weighted laser-trimmed current sources switched into a silicon-chromium thin-film R/2R resistor ladder network ...

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AD558K AD [Analog Devices], AD558K Datasheet

AD558K

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AD558K Summary of contents

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