ADS-939 MURATA-PS [Murata Power Solutions Inc.], ADS-939 Datasheet

ADS-939

Manufacturer Part Number

ADS-939

Description

16-Bit, 10MHz Sampling A/D Converters

Manufacturer

MURATA-PS [Murata Power Solutions Inc.]

Datasheet

1.ADS-939.pdf (7 pages)

Current page: 1 of 7
Download datasheet (224Kb)

PRELIMINARY DATA

FEATURES

GENERAL DESCRIPTION

The ADS-939 is a 16-bit, 10MHz 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-939 has been

optimized to achieve a signal-to-noise ratio (SNR) of 82dB and a total

harmonic distortion (THD) of –86dB.

Packaged in a 40-pin TDIP, the functionally complete ADS-939 contains a

fast-settling sample-hold ampliﬁer, a subranging (two-pass) A/D converter,

an internal reference, timing/control logic, and error-correction circuitry.

Digital input and output levels are TTL. The ADS-939 only requires the

rising edge of the start convert pulse to operate.

Requiring ±5V supplies and either ±12v or ±15V supplies the ADS-939

dissipates 3.0 Watts. The device is offered with a bipolar (±2.75V) or a

unipolar (0 to –5.5V) analog input range. Models are available for use

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

temperature ranges. A proprietary, auto-calibrating, error-correcting circuit

enables the device to achieve speciﬁed performance over the full military

temperature range. Typical applications include medical imaging, radar,

sonar, communications and instrumentation.

16-bit resolution

10MHz sampling rate

Functionally complete

No missing codes over full military temperature range

Edge-triggered

±5V, ±12V or ±15V supplies, 1.5 Watts

Small, 40-pin, ceramic TDIP

82dB SNR, –86dB THD

Ideal for both time and frequency-domain applications

+5V ANALOG SUPPLY

+5V DIGITAL SUPPLY

–5V SUPPLY

ANALOG GROUND

DIGITAL GROUND

–12/–15V ANALOG SUPPLY

+12/+15V ANALOG SUPPLY

POWER AND GROUNDING

www.murata-ps.com/rohs

For full details go to

4, 36

7, 30

+5V ANALOG SUPPLY

+5V DIGITAL SUPPLY

–5V SUPPLY

ANALOG GROUND

DIGITAL GROUND

NO CONNECTION

POWER AND GROUNDING

www.murata-ps.com

2, 4, 36

39, 40

7, 30

START CONVERT 12

UNIPOLAR 2

OFFSET ADJUST 5

+3.2V REF. OUT 1

ANALOG INPUT 3

GAIN ADJUST 6

COMP. BITS 35

EOC 32

INPUT/OUTPUT CONNECTIONS

Figure 1. ADS-939 Functional Block Diagram

ADJUST

OFFSET

ADJUST

FUNCTION

+3.2V REF. OUT

UNIPOLAR

ANALOG INPUT

ANALOG GROUND

OFFSET ADJUST

GAIN ADJUST

DIGITAL GROUND

START CONVERT

BIT 16 (LSB)

BIT 15

BIT 14

BIT 13

BIT 12

BIT 11

BIT 10

BIT 9

GAIN

CKT.

+3.2V REFERENCE

CONTROL LOGIC

S/H

TIMING AND

PRECISION

16-Bit, 10MHz Sampling A/D Converters

Technical enquiries email: sales@murata-ps.com, tel:

FUNCTION

+12V/+15V

–12V/–15V

+5V ANALOG SUPPLY

–5V SUPPLY

ANALOG GROUND

COMP. BITS

OUTPUT ENABLE

OVERFLOW

EOC

+5V DIGITAL SUPPLY

DIGITAL GROUND

BIT 1 (MSB)

BIT 2

BIT 3

BIT 4

BIT 5

BIT 6

BIT 7

BIT 8

MDA_ADS-939.A01 Page 1 of 7

ADS-939

10 FSTAT1

11 FSTAT2

29 BIT 1 (MSB)

28 BIT 1 (MSB)

27 BIT 2

26 BIT 3

25 BIT 4

24 BIT 5

23 BIT 6

22 BIT 7

21 BIT 8

20 BIT 9

19 BIT 10

18 BIT 11

17 BIT 12

16 BIT 13

15 BIT 14

14 BIT 15

13 BIT 16 (LSB)

34 OUTPUT ENABLE

33 OVERFLOW

8 FIFO/DIR

9 FIFO/READ

+1 508 339 3000

Related parts for ADS-939

ADS-939 Summary of contents

Page 1

... A/D converter, an internal reference, timing/control logic, and error-correction circuitry. Digital input and output levels are TTL. The ADS-939 only requires the rising edge of the start convert pulse to operate. Requiring ±5V supplies and either ±12v or ±15V supplies the ADS-939 dissipates 3.0 Watts. The device is offered with a bipolar (± ...

Page 2

... Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 MDA_ADS-939.A01 Page °C °C °C pF Volts μA μA ns Bits LSB LSB % Bits ...

Page 3

... ANALOG GROUND (pin 4) if not using offset and gain adjust circuits. 3. Pin 35 (COMP. BITS) is used to select the digital output coding format of the ADS-939A. See Tables 2a and 2b. When this pin has a TTL logic "0" applied, it complements all of the ADS-939A’s digital outputs. ...

Page 4

... To avoid interaction, adjust offset before gain. The ranges of adjustment for the circuits in Figure 2 are guaranteed to compensate for the ADS-939’s initial accuracy errors and may not be able to compensate for additional system errors. ...

Page 5

... N+4 N+1 N+2 N+3 5ns typ. 35ns 10ns typ. 40ns 20ns typ. N-7 N-6 N-5 N-4 N-3 Figure 3. ADS-939 Timing Diagram www.murata-ps.com ADS-939 16-Bit, 10MHz Sampling A/D Converters TWO'S COMP. INPUT RANGE LSB MSB LSB ±2.75V 1000 0000 0000 0000 +2.749916 LSB "0" to "1" +2.749874 +FS –1 1/2 LSB 1001 1111 1111 1111 +2 ...

Page 6

... Preliminary Evaluation Board - Modiﬁed ADS-B933 to include ±12V or ±15V Supplies to U6 Figure 4. ADS-939 Evaluation Board Schematic. www.murata-ps.com ADS-939 16-Bit, 10MHz Sampling A/D Converters Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 MDA_ADS-939.A01 Page ...

Page 7

... Lead Finish: 50 microinches (minimum) gold plating over 100 microinches (nominal) nickel plating 0.015/0.009 (0.381/0.229) 0.110/0.090 0.900 ±0.010 (2.794/2.286 (22.86) Evaluation Board (without ADS-939) Heat Sink for all ADS-939 models Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 MDA_ADS-939.A01 Page ...

Related keywords

ADS-939 datasheet
ADS-939 data sheet
ADS-939 pdf datasheet
ADS-939 component
ADS-939 part
ADS-939 distributor
ADS-939 RoHS
ADS-939 datasheet download