AD9054

–4–

REV. 0

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily

accumulate on the human body and test equipment and can discharge without detection.

Although the AD9054 features proprietary ESD protection circuitry, permanent damage may

occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD

precautions are recommended to avoid performance degradation or loss of functionality.

ABSOLUTE MAXIMUM RATINGS*

Digital Output Current . . . . . . . . . . . . . . . . . . . . . . . . 20 mA

Operating Temperature . . . . . . . . . . . . . . . . –55

°C to +125°C

Storage Temperature . . . . . . . . . . . . . . . . . . –65

°C to +150°C

Maximum Junction Temperature . . . . . . . . . . . . . . . +175

°C

Maximum Case Temperature . . . . . . . . . . . . . . . . . . +150

°C

*Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. This is a stress rating only; functional operation of the

device at these or any other conditions outside of those indicated in the operation

sections of this specification is not implied. Exposure to absolute maximum ratings

for extended periods may affect device reliability.

Table I. Output Coding

Step

AIN–

AIN

Code

Binary

255

≥0.512 V

255

1111 1111

254

0.508 V

254

1111 1110

253

0.504 V

253

1111 1101

••

•

•

••

•

•

••

•

•

129

0.006 V

129

1000 0001

128

0.002 V

128

1000 0000

127

–0.002 V

127

0111 1111

126

–0.006 V

126

0111 1110

••

•

•

••

•

•

••

•

•

2

–0.504 V

2

0000 0010

1

–0.508 V

1

0000 0001

0

≤–0.512 V

0

0000 0000

ORDERING GUIDE

Temperature

Package

Model

Range

Option*

AD9054BST-200

–40

°C to +85°C

ST-44

AD9054BST-135

–40

°C to +85°C

ST-44

AD9054/PCB

+25

°C

Evaluation Board

*ST = Plastic Thin Quad Flatpack (TQFP).

PIN FUNCTION DESCRIPTIONS

Pin Number

Name

Function

1

ENCODE

Encode Clock for ADC (ADC

Samples on Rising Edge of

ENCODE).

2

ENCODE

Encode Clock Complement

(ADC Samples on Falling Edge

of

ENCODE).

3, 5, 15, 18, 28,

VDD

Power Supply (+5 V).

30, 31, 36, 41

4, 6, 16, 17, 27,

GND

Ground.

29, 32, 35, 37, 40

14–7

Digital Outputs of ADC Channel

19–26

Digital Outputs of ADC Channel

33

VREF OUT

Internal Reference Output

(+2.5 V typical); Bypass with

0.1

µF to Ground.

34

VREF IN

Reference Input for ADC (+2.5 V

typical,

±4%).

38

AIN

Analog Input—Complement.

Connect to input signal midscale

reference.

39

AIN

Analog Input—True.

42

DEMUX

Format Select. LOW = Dual.

Channel Mode, HIGH = Single.

Channel Mode (Channel A Only).

43

DS

Data Sync Complement.

44

DS

Data Sync—Aligns output chan-

nels in Dual-Channel Mode.

PIN CONFIGURATION

WARNING!

ESD SENSITIVE DEVICE

PIN 1

IDENTIFIER

TOP VIEW

(PINS DOWN)

GND

VDD

GND

VDD

DS

DS

DEMUX

VDD

GND

AIN

AIN

GND

VDD

GND

VREF IN

AD9054