AD876
PIN FUNCTION DESCRIPTIONS
Symbol
D0 (LSB)
D1–D4
D5–D8
D9 (MSB)
THREE-
STATE
STBY
CLK
CML
REFTF
REFBF
REFTS
REFBS
AIN
AV
DD
AV
SS
DV
DD
DV
SS
DRV
DD
DRV
SS
SOIC
Pin No.
3
4–7
8–11
12
16
TQFP
Pin No.
1
2–5
8–11
12
23
Type
DO
DO
DO
DI
Name and Function
Least Significant Bit.
Data Bits 1 through 4.
Data Bits 5 through 8.
Most Significant Bit.
THREE-STATE = LOW
THREE-STATE = HIGH
or N/C
Normal Operating Mode
High Impedance Outputs
STBY = LOW or N/C
STBY = HIGH
Normal Operating Mode
Standby Mode
Clock Input.
Bypass Pin for an Internal Bias Point.
Reference Top Force.
Reference Bottom Force.
Reference Top Sense.
Reference Bottom Sense.
Analog Input.
+5 V Analog Supply.
Analog Ground.
+5 V Digital Supply.
Digital Ground.
+3.3 V/+5 V Digital Supply. Supply for digital
input and output buffers.
+3.3 V/+5 V Digital Ground. Ground for digital
input and output buffers.
17
15
26
22
24
21
25
27
28
1
18
14, 19, 20
2
13
24
22
38
30
34
29
35
39
42
44
26
17, 27, 28
45
16
DI
DI
AO
AI
AI
AI
AI
AI
P
P
P
P
P
P
Type: AI = Analog Input; AO = Analog Output; DI = Digital Input; DO = Digital Output; P = Power.
PIN CONFIGURATIONS
SOIC/SSOP
DRV
DD
AV
SS
TQFP
AV
DD
CML
AIN
AV
SS
DRV
DD
1
2
3
4
5
6
7
8
9
28 AV
DD
27 AIN
26 CML
25 REFBS
24 REFBF
D0 1
D1 2
D2 3
D3 4
D4 5
6
7
D5 8
D6 9
D7 10
D8 11
D9 12
48 47 46 45 44 43 42
41 40 39 38 37
36
35 REFBS
34 REFBF
33
32
*
D0
*
D1
D2
D3
D4
D5
D6
AD876
TOP VIEW
(Not to Scale)
23 NC
22 REFTF
21 REFTS
20 DV
SS
19 DV
SS
18 DV
DD
17 STBY
16 THREE-STATE
15 CLK
AD876
TOP VIEW
(Not to Scale)
31
30 REFTF
29 REFTS
28 DV
SS
27 DV
SS
26 DV
DD
25
D7 10
D8 11
D9 12
DRV
SS
13
DV
SS
14
*
PINS D0 AND D1 ARE LEFT OPEN
FOR THE AD876JR-8
NC = NO CONNECT
13 14 15 16 17 18 19 20 21 22 23 24
THREE-STATE
DRV
SS
DV
SS
STBY
CLK
–4–
REV. B
AD [ ANALOG DEVICES ]
