dac-hk C&D Technologies., dac-hk Datasheet

dac-hk

Manufacturer Part Number

dac-hk

Description

High-performance, 12-bit Dac?s With Input Registers

Manufacturer

C&D Technologies.

Datasheet

1.DAC-HK.pdf (4 pages)

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FEATURES

GENERAL DESCRIPTION

The DAC-HK Series hybrid D/A converters are high-

performance 12-bit devices with a fast settling voltage output.

They incorporate a level-controlled input storage register and

are specifically designed for systems applications such as data

bus interfacing with computers. When the “load” input is high,

data in the storage register is held, and when the load input is

low, data is transferred through to the DAC. There are two

basic models available by coding option: binary and two’s

complement. The output voltage ranges are externally pin-

programmable and include: 0 to +5V, 0 to +10V, ±2.5V, ±5V

and ±10V.

The DAC-HK Series contains a precision zener reference

circuit. This eliminates code-dependent ground currents by

routing current from the positive supply to the internal ground

node as determined by the R-2R ladder network. The internal

feedback resistors for the on-board amplifier track the ladder

network resistors, enhancing temperature performance. The

excellent tracking of the resistors results in a differential

nonlinearity tempco of ±2ppm/°C maximum. The temperature

coefficient of gain is ±20ppm/°C maximum, and the tempco of

zero is ±5ppm/°C maximum.

12-Bit resolution

Integral nonlinearity error ±1/2LSB, max.

Differential nonlinearity error ±3/4LSB, max.

MIL-STD-883 high-reliability versions available

Input register

3µs fast settling time

Guaranteed monotonicity over full temperature range

INNOVATION and EX C ELL E N C E

LOAD 16

+5V

BITS

MSB

1 2 3 4

74LS75

REF.

OUT

2 3 4

DIGITAL INPUTS

Figure 1. Functional Block Diagram

D/A CONVERTER

5 6 7 8

ADJUST

74LS75

GAIN

9 10 11 12

BIPOLAR

OFFSET

74LS75

LSB

SUPPLY

+15V

FUNCTION

BIT 1 (MSB)

BIT 2

BIT 3

BIT 4

BIT 5

BIT 6

BIT 7

BIT 8

BIT 9

BIT 10

BIT 11

BIT 12 (LSB)

DAC’s with Input Registers

INPUT/OUTPUT CONNECTIONS

SUPPLY

High-Performance, 12-Bit

–15V

DAC-HK Series

SUPPLY

+5V

20V RANGE

10V RANGE

SUMMING

JUNCTION

VOLTAGE

OUTPUT

GROUND

LOAD

VOLTAGE OUTPUT

FUNCTION

REFERENCE OUT

GAIN ADJUST

+15V SUPPLY

GROUND

SUMMING JUNCTION

20V RANGE

10V RANGE

BIPOLAR OFFSET

–15V SUPPLY

+5V SUPPLY

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dac-hk Summary of contents

Page 1

... Guaranteed monotonicity over full temperature range GENERAL DESCRIPTION The DAC-HK Series hybrid D/A converters are high- performance 12-bit devices with a fast settling voltage output. They incorporate a level-controlled input storage register and are specifically designed for systems applications such as data bus interfacing with computers. When the “ ...

Page 2

... GAIN ADJ. potentiometer to give the positive full-scale output voltage shown in Table 2. Hold LOAD Transfer 1 DATA IN 0 REGISTER OUTPUT TO DAC ALL RISE AND FALL TIMES ® t SETUP 50nsec min. t SETUP 50nsec min PHL PLH 60nsec 60nsec 10nsec Figure 2. DAC-HK Timing ® ...

Page 3

... MSB ADJUST +15V APPLICATIONS LOAD 0 DAC-HK12B LOAD N LSB's MSB • • • • • • ADDRESS DECODER ADDRESS • • • • • WRITE STROBE DAC-HK Series LOAD 1µF 1µ 2.2M 100k 20 ZERO ADJUST ADJUST 0.01µ ...

Page 4

... DAC-HK Series STRAIGHT BINARY MSB OFFSET BINARY MSB LSB ...

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