ADS-947MM ETC, ADS-947MM Datasheet

ADS-947MM

Manufacturer Part Number

ADS-947MM

Description

14-Bit/ 10MHz Sampling A/D Converters

Manufacturer

ETC

Datasheet

1.ADS-947MM.pdf (8 pages)

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PRELIMINARY PRODUCT DATA

FEATURES

GENERAL DESCRIPTION

The low-cost ADS-947 is a 14-bit, 10MHz sampling A/D

converter. This device accurately samples full-scale input

signals up to Nyquist frequencies with no missing codes.

Excellent differential nonlinearity error (DNL), signal-to-noise

ratio (SNR), and total harmonic distortion (THD) make the

ADS-947 the ideal choice for both time-domain (CCD/FPA

imaging, scanners, process control) and frequency-domain

(radar, telecommunications, spectrum analysis) applications.

The functionally complete ADS-947 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-947

only requires the rising edge of a start convert pulse to

operate.

Requiring only +5V and –5.2V supplies, the ADS-947 typically

dissipates just 2 Watts. The device is offered with a bipolar

input range of ±2V. Models are available for use in either

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

DATEL, Inc., Mansfield, MA 02048 (USA)

14-bit resolution

10MHz minimum sampling rate

No missing codes over full military temperature range

Ideal for both time and frequency-domain applications

Excellent THD (–81dB) and SNR (76dB)

Edge-triggered

Small, 24-pin, ceramic DDIP or SMT

Requires only +5V and –5.2V supplies

Low-power, 2 Watts

Low cost

+5V ANALOG SUPPLY

+5V DIGITAL SUPPLY

–5.2V SUPPLY

ANALOG GROUND

DIGITAL GROUND

POWER AND GROUNDING

START CONVERT 18

OFFSET ADJUST 23

ANALOG INPUT 21

DATA VALID 17

19, 24

Tel: (508) 339-3000, (800) 233-2765 Fax: (508) 339-6356

CONTROL LOGIC

–

S/H

TIMING AND

Figure 1. ADS-947 Functional Block Diagram

AMP

BUFFER

REF

FLASH

ADC

DAC

ADC

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

correcting circuit allows the device to achieve specified

performance over the full military temperature range.

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

INPUT/OUTPUT CONNECTIONS

Sampling A/D Converters

Email: sales@datel.com

14-Bit, 10MHz

ADS-947

FUNCTION

ANALOG GROUND

OFFSET ADJUST

+5V ANALOG SUPPLY

ANALOG INPUT

–5.2V SUPPLY

ANALOG GROUND

START CONVERT

DATA VALID

BIT 14 (LSB)

BIT 13

DIGITAL GROUND

+5V DIGITAL SUPPLY

Internet: www.datel.com

16 BIT 14 (LSB)

15 BIT 13

12 BIT 12

11 BIT 11

10 BIT 10

BIT 9

BIT 8

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1 (MSB)

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