ADS-944MC Murata Power Solutions Inc, ADS-944MC Datasheet

ADS-944MC

Manufacturer Part Number

ADS-944MC

Description

Analog To Digital Converter

Manufacturer

Murata Power Solutions Inc

Datasheets

1.ADS-944MC.pdf (8 pages)

2.ADS-944MC.pdf (9 pages)

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DATEL, Inc., 11 Cabot Boulevard, Mansfield, MA 02048-1151 (U.S.A.)

FEATURES

GENERAL DESCRIPTION

The low-cost ADS-944 is a high-performance, 14-bit, 5MHz

sampling A/D converter. This device accurately samples full-

scale input signals up to Nyquist frequencies with no missing

codes. The dynamic performance of the ADS-944 has been

optimized to achieve a THD of –77dB and a SNR of 76dB.

Packaged in a small, 32-pin TDIP, the functionally complete

ADS-944 contains a fast-settling sample-hold amplifier, a

subranging (two-pass) A/D converter, an internal reference,

timing and control logic, three-state outputs, and error-

correction circuitry. Digital input and output levels are TTL.

Requiring ±15V, +5V and –5.2V supplies, the ADS-944

typically dissipates 2.95 Watts. The unit is offered with a

bipolar input range of ±1.25V. Models are available for use in

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

operating temperature ranges. Typical applications include

radar signal analysis, medical/graphic imaging, and

FFT spectrum analysis.

14-bit resolution

5MHz minimum sampling rate

No missing codes over full military temperature range

Edge-triggered, no pipeline delay

Low power, 2.95 Watts

Small, 32-pin, ceramic TDIP package

SMT package available

Excellent dynamic performance

MIL-STD-883 screening or DESC SMD available

START CONVERT 32

OFFSET ADJUST 5

ANALOG INPUT 3

GAIN ADJUST 7

EOC 16

ANALOG

SUPPLY

+5V

CIRCUIT

OFFSET

GAIN

CONTROL LOGIC

–

SUPPLY

DIGITAL

S/H

TIMING AND

–5.2V

Figure 1. ADS-944 Functional Block Diagram

GROUND

ANALOG

4, 6, 11

AMP

BUFFER

REF

DIGITAL

SUPPLY

Tel: (508) 339-3000 Fax: (508) 339-6356

+5V

FLASH

ADC

DAC

SUPPLY

+15V

FUNCTION

+5V ANALOG SUPPLY

–5.2V DIGITAL SUPPLY

ANALOG INPUT

ANALOG GROUND

OFFSET ADJUST

ANALOG GROUND

GAIN ADJUST

COMP. BITS

OUTPUT ENABLE

+5V DIGITAL SUPPLY

ANALOG GROUND

+15V SUPPLY

–15V SUPPLY

–5.2V ANALOG SUPPLY

DIGITAL GROUND

EOC

ANALOG

SUPPLY

–5.2V

INPUT/OUTPUT CONNECTIONS

Sampling A/D Converters

GROUND

DIGITAL

For immediate assistance: (800) 233-2765

COMP.

BITS

31 BIT 1 (MSB)

30 BIT 1 (MSB)

29 BIT 2

28 BIT 3

27 BIT 4

26 BIT 5

25 BIT 6

24 BIT 7

23 BIT 8

22 BIT 9

21 BIT 10

20 BIT 11

19 BIT 12

18 BIT 13

17 BIT 14 (LSB)

14-Bit, 5MHz

9 OUTPUT ENABLE

ADS-944

START CONVERT

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

BIT 13

BIT 14 (LSB)

FUNCTION

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