ad773akd Analog Devices, Inc., ad773akd Datasheet

ad773akd

Manufacturer Part Number

ad773akd

Description

10-bit, 20 Msps Monolithic A/d Converter

Manufacturer

Analog Devices, Inc.

Datasheet

1.AD773AKD.pdf (16 pages)

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PRODUCT DESCRIPTION

The AD773A is a monolithic 10-bit, 20 Msps analog-to-digital

converter incorporating an on-board, high performance track-

and-hold amplifier (THA). The AD773A converts video

bandwidth signals without the use of an external THA. The

AD773A implements a multistage differential pipelined

architecture with output error correction logic. The AD773A

offers accurate performance and guarantees no missing codes

over the full operating temperature range.

Output data is presented in binary and twos complement

format. An out of range (OTR) signal indicates the analog input

voltage is beyond the specified input range. OTR can be

decoded with the MSB/MSB pins to signal an underflow or

overflow condition. The high impedance reference input allows

multiple AD773As to be driven in parallel from a single

reference.

The combined dc precision and dynamic performance of the

AD773A is useful in a variety of applications. Typical

applications include: video enhancement, HDTV, ghost

cancellation, ultrasound imaging, radar and high speed data

acquisition.

The AD773A was designed using Analog Devices’ ABCMOS-1

process which utilizes high speed bipolar and 2-micron CMOS

transistors on a single chip. High speed, precision analog

circuits are now combined with high density logic circuits. Laser

trimmed thin film resistors are used to optimize accuracy and

temperature stability.

The AD773A is packaged in a 28-pin ceramic DIP and is

available in commercial (0 C to +70 C) and military (–55 C to

+125 C) grades.

REV. 0

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

FEATURES

Monolithic 10-Bit, 20 MSPS A/D Converter

Low Power Dissipation: 1.0 W

Signal-to-Noise Plus Distortion Ratio

Guaranteed No Missing Codes

On-Chip Track-and-Hold Amplifier

100 MHz Full Power Bandwidth

High Impedance Reference Input

Out of Range Output

Twos Complement and Binary Output Data

Available in Commercial and Military Temperature

Ranges (See Military/Aerospace Reference Manual

for Specifications)

= 1 MHz: 56 dB

= 10 MHz: 54 dB

PRODUCT HIGHLIGHTS

1. On-board THA

2. High Impedance Reference Input

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 617/329-4700

3. Output Data Flexibility

4. Out of Range (OTR)

5. Military Temperature Range

CLOCK

The high impedance differential input THA eliminates the

need for external buffering or sample and hold amplifiers.

The THA offers the choice of differential or single-ended

inputs. Input current is typically 5 A.

The high impedance reference input (200 k ) allows direct

connection with standard +2.5 V references, such as the

AD680, AD580 and REF43.

Output data is available in bipolar offset and bipolar twos

complement binary format.

The OTR output bit indicates when the input signal is

beyond the AD773A’s input range.

INA

INB

REFIN REFGND

THA

AD773A

CONTROL

TIMING

FUNCTIONAL BLOCK DIAGRAM

Monolithic A/D Converter

THA

A/D

DAC

AGND

5, 28

10-Bit, 20 MSPS

THA

CORRECTION LOGIC

OTR MSB

OUTPUT BUFFERS

3, 25

A/D

(MSB)

BIT 1

AD773A

DGND

BIT 10

DAC

(LSB)

Fax: 617/326-8703

DRV

7, 22

A/D

DRGND

8, 21

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