adc-hz-883 C&D Technologies., adc-hz-883 Datasheet

adc-hz-883

Manufacturer Part Number

adc-hz-883

Description

12-bit, 8 And 20?sec Analog-to-digital Converters

Manufacturer

C&D Technologies.

Datasheet

1.ADC-HZ-883.pdf (6 pages)

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ADC-HX, ADC-HZ Series

12-Bit, 8 and 20µsec

Analog-to-Digital Converters

FEATURES

GENERAL DESCRIPTION

The ADC-HX and ADC-HZ Series are self-contained, high-

performance, 12-bit A/D converters manufactured with thick

and thin-film hybrid technology. They use the successive

approximation conversion technique to achieve a 12-bit

conversion in 20 and 8 microseconds, respectively. Five input

voltage ranges are programmable by external pin connection.

An internal buffer amplifier is also provided for applications in

which 50 megohm input impedance is required.

These converters utilize a fast 12-bit monolithic DAC which

includes a precision zener reference source. The circuit also

contains a fast monolithic comparator, a monolithic 12-bit

successive approximation register, a clock and a monolithic

buffer amplifier. Nonlinearity is specified at ±1/2LSB maximum.

Both models have identical operation except for conversion

speed. They can be short-cycled to give faster conversions in

lower-resolution applications. Use of the internal buffer

amplifier increases conversion time by 3 microseconds, the

settling time of the amplifier. Output coding is complementary

binary, complementary offset binary, or complementary two’s

complement. Serial data is also brought out. The package is a

32-pin ceramic TDIP. Models are available for use in either

commercial (0 to +70°C) or military (–55 to +125°C) operating

12-bit resolution

8 or 20 microsecond conversion times

5 input voltage ranges

Internal high Z input buffer

Short-cycle operation

MIL-STD-883 models available

DATEL, Inc., 11 Cabot Boulevard, Mansfield, MA 02048-1194 (U.S.A.) Tel: 508-339-3000 Fax: 508-339-6356 • For immediate assistance 800-233-2765

COMPARATOR

COMMON

BIPOLAR

OUTPUT

BUFFER

OFFSET

ANALOG

INPUT

10V

20V

+15V POWER

CLOCK

RATE

AMPLIFIER

BUFFER

–15V POWER

Figure 1. Functional Block Diagram

COMPARATOR

CLOCK

OUT

START

CONV.

6.3k

LSB.

REF. OUT

temperature ranges. MIL-STD-883 and DESC Standard

Military Drawing models are also available.

PARALLEL DATA OUT

APPROXIMATION

FUNCTION

BIT 12 (LSB)

BIT 11

BIT 10

BIT 9

BIT 8

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1 (MSB)

SHORT CYCLE

DIGITAL COMMON

+5V POWER

12-BIT DAC

SUCCESSIVE

PRECISION

REF (+6.3V)

BIT NO.

INPUT/OUTPUT CONNECTIONS

+5V POWER

MSB

INNOVATION and EX C ELL E N C E

SERIAL

DATA

OUT

SERIAL DATA OUTPUT

+15V POWER

GAIN ADJUST

ANALOG COMMON

BIPOLAR OFFSET

COMPARATOR INPUT

START CONVERT

E.O.C. (STATUS)

CLOCK OUT

FUNCTION

–15V POWER

BUFFER INPUT

BUFFER OUTPUT

20V INPUT RANGE

10V INPUT RANGE

REFERENCE OUT

CLOCK RATE

GAIN

ADJUST

DIGITAL

COMMON

SHORT

CYCLE

E.O.C.

STATUS

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adc-hz-883 Summary of contents

Page 1

... Internal high Z input buffer Short-cycle operation MIL-STD-883 models available GENERAL DESCRIPTION The ADC-HX and ADC-HZ Series are self-contained, high- performance, 12-bit A/D converters manufactured with thick and thin-film hybrid technology. They use the successive approximation conversion technique to achieve a 12-bit conversion in 20 and 8 microseconds, respectively. Five input voltage ranges are programmable by external pin connection ...

Page 2

... Footnotes: Adjustable to zero. FSR is full scale range and is 10V for 0 to +10V or ±5V inputs and 20V for ±10V input, etc. Without buffer amplifier used. ADC-HZ may require external adjustment of clock rate. Short cycled operation. All digital outputs can drive 2 TTL loads. ...

Page 3

... Refer to Technical Note 4 for methods of reducing the ADC-HX or ADC-HZ conversion times. CONNECTIONS 16 17 CLOCK 15 RATE 14 SHORT CYCLE TO SELECTED DATA OUTPUT PIN CLOCK RATE VS ...

Page 4

... ADC-HX, ADC-HZ +5V + 10µF +5V COMMON DATA OUTPUTS +5V + 10µF +5V COMMON DATA OUTPUTS CONNECTIONS AND CALIBRATION INPUT VOLTAGE INPUT RANGE +10V ±2.5V ±5V ±10V DATEL, Inc., 11 Cabot Boulevard, Mansfield, MA 02048-1194 (U.S.A.) Tel: 508-339-3000 Fax: 508-339-6356 • For immediate assistance 800-233-2765 START ...

Page 5

... BIT 12 (LSB) or bipolar gain adjustment (+FS – 1.5LSB). Adjust the gain trimming potentiometer so that the output code flickers equally between 0000 0000 0001 and 0000 0000 0000. UNIPOLAR BIPOLAR TIMING DIAGRAM FOR ADC-HX, ADC-HZ OUTPUT: 101010101010 100ns min. 60ns T1 40ns 100ns ...

Page 6

... ADC-HX, ADC- 0.235 MAX. (5.969) 0.190 MAX. 0.018 ±0.002 (4.826) (0.457) MODEL ADC-HX12BGC ADC-HX12BMC ADC-HX12BMM ADC-HX12BMM-QL ADC-HX/883 ADC-HZ12BGC ADC-HZ12BMC ADC-HZ12BMM ADC-HZ12BMM-QL ADC-HZ/883 MIL-STD-883B units are available under DESC Drawing Number 5962-88508. Contact DATEL for 883 product specification. ...

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