ADS7882 Datasheet, PDF (6/29 Pages) Texas Instruments – 12-BIT, 3-MSPS LOW POWER SAR ANALOG-TO-DIGITAL CONVERTER

ADS7882
SLAS630 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com
PIN ASSIGNMENTS
48 47 46 45 44 43 42 41 40 39 38 37
REFIN 1
REFOUT 2
NC ₃
+VA 4
AGND 5
+IN 6
−IN 7
AGND 8
+VA 9
+VA 10
AGND 11
AGND 12
36 BUSY
35 BDGND
34 +VBD
33 NC
32 NC
31 NC
30 _NC
29 DB0
28 DB1
27 _DB2
26 _DB3
25 _BDGND
13 14 15 16 17 18 19 20 21 22 23 24
NC − No connection
NAME
PIN
NO. PFB
DATA BUS
DB11
16
DB10
17
DB9
18
DB8
19
DB7
20
DB6
21
DB5
22
DB4
23
DB3
26
DB2
27
DB1
28
DB0
29
CONTROL PINS
CS
42
CONVST
40
RD
41
A_PWD
37
PIN FUNCTIONS
I/O
DESCRIPTION
8-BIT BUS
16-BIT BUS
BYTE = 0
BYTE = 1
BYTE = 0
O
D11 (MSB)
D3
D11 (MSB)
O
D10
D2
D10
O
D9
D1
D9
O
D8
D0 (LSB)
D8
O
D7
0
D7
O
D6
0
D6
O
D5
0
D5
O
D4
0
D4
O
D3
0
D3
O
D2
0
D2
O
D1
0
D1
O
D0 (LSB)
0
D0 (LSB)
I
Chip select. Active low signal enables chip operation like acquisition start, conversion start, bus
release from 3-state. Refer to the timing diagrams for more details.
I
Conversion start. The rising edge starts the acquisition. The falling edge of this input ends the
acquisition and starts the conversion. Refer to the timing diagrams for more details.
I
Active low synchronization pulse for the parallel output. When CS is low, this serves as the
output enable and puts the previous conversion results on the bus.
I Nap mode enable, active low
6
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