
AD9054
–4–
REV. 0
C AUT ION
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. T herefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
ABSOLUT E MAX IMUM RAT INGS*
V
DD
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +6 V
Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . V
DD
to 0.0 V
Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . V
DD
to 0.0 V
VREF IN, VREF OUT . . . . . . . . . . . . . . . . . . . V
DD
to 0.0 V
Digital Output Current . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
Operating T emperature . . . . . . . . . . . . . . . . –55
°
C to +125
°
C
Storage T emperature . . . . . . . . . . . . . . . . . . –65
°
C to +150
°
C
Maximum Junction T emperature . . . . . . . . . . . . . . . +175
°
C
Maximum Case T emperature . . . . . . . . . . . . . . . . . . +150
°
C
*Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. T his 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.
T able I. Output Coding
Step
AIN–
AIN
Code
Binary
255
254
253
129
128
127
126
2
1
0
≥
0.512 V
0.508 V
0.504 V
0.006 V
0.002 V
–0.002 V
–0.006 V
–0.504 V
–0.508 V
≤
–0.512 V
255
254
253
129
128
127
126
2
1
0
1111 1111
1111 1110
1111 1101
1000 0001
1000 0000
0111 1111
0111 1110
0000 0010
0000 0001
0000 0000
ORDE RING GUIDE
T emperature
Range
–40
°
C to +85
°
C
–40
°
C to +85
°
C
+25
°
C
Package
Option*
Model
AD9054BST -200
AD9054BST -135
AD9054/PCB
ST -44
ST -44
Evaluation Board
*ST = Plastic T hin Quad Flatpack (T QFP).
PIN FUNCT ION DE SCRIPT IONS
Pin Number
Name
Function
1
ENCODE
Encode Clock for ADC (ADC
Samples on Rising Edge of
ENCODE).
Encode Clock Complement
(ADC Samples on Falling Edge
of
ENCODE
).
Power Supply (+5 V).
2
ENCODE
3, 5, 15, 18, 28,
30, 31, 36, 41
4, 6, 16, 17, 27,
29, 32, 35, 37, 40
14–7
VDD
GND
Ground.
DA
0
–DA
7
Digital Outputs of ADC Channel
A. DA
7
is the MSB, DA
0
the LSB.
Digital Outputs of ADC Channel
B. DB
7
is the MSB, DB
0
the LSB.
Internal Reference Output
(+2.5 V typical); Bypass with
0.1
μ
F to Ground.
Reference Input for ADC (+2.5 V
typical,
±
4%).
Analog Input—Complement.
Connect to input signal midscale
reference.
Analog Input—T rue.
Format Select. LOW = Dual.
Channel Mode, HIGH = Single.
Channel Mode (Channel A Only).
Data Sync Complement.
Data Sync—Aligns output chan-
nels in Dual-Channel Mode.
19–26
DB
0
–DB
7
33
VREF OUT
34
VREF IN
38
AIN
39
42
AIN
DEMUX
43
44
DS
DS
PIN CONFIGURAT ION
WARNNG
ESD SENSITIVE DEVICE
PIN 1
TOP VIEW
(PINS DOWN)
DB
1
DB
0
(LSB)
DB
2
DB
3
GND
DA
2
DA
1
DA
0
(LSB)
VDD
GND
VDD
V
G
V
V
G
V
G
E
E
V
G
V
G
D
7
D
6
D
5
D
4
D
3
D
7
(
D
6
D
5
D
4
DS
DS
DEMUX
VDD
GND
AIN
AIN
GND
VDD
GND
VREF IN
AD9054