ADS7864
www.ti.com
SBAS141A – SEPTEMBER 2000 – REVISED MARCH 2005
PIN DESCRIPTIONS
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
NAME
+V
A
AGND
DB15
DB14
DB13
DB12
DB11
DB10
DB9
DB8
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
BUSY
DGND
+V
D
CLOCK
RD
CS
HOLDC
HOLDB
HOLDA
BYTE
A2
A1
A0
RESET
REFOUT
REFIN
AGND
+V
A
CH A1+
CH A1–
CH B1+
CH B1–
CH C1+
CH C1–
CH C0–
CH C0+
CH B0–
CH B0+
CH A0–
CH A0+
DESCRIPTION
Analog Power Supply. Normally +5V.
Analog Ground
Data Valid Output: ‘1’ for data valid; ‘0’ for invalid data.
Channel Address Output Pin (see
Channel Address Output Pin (see
Channel Address Output Pin (see
Data Bit 11 - MSB
Data Bit 10
Data Bit 9
Data Bit 8
Data Bit 7
Data Bit 6
Data Bit 5
Data Bit 4
Data Bit 3
Data Bit 2
Data Bit 1
Data Bit 0 - LSB
Low when a conversion is in progress.
Digital Ground
Digital Power Supply, +5VDC
An external clock must be applied to the CLOCK input.
RD Input. Enables the parallel output when used in conjunction with chip select.
Chip Select
Places Channels C0 and C1 in hold mode.
Places Channels B0 and B1 in hold mode.
Places Channels A0 and A1 in hold mode.
2 × 8 Output Capability. Active high.
A2 Address/Mode Select Pin (see
A1 Address/Mode Select Pin (see
A0 Address/Mode Select Pin (see
Reset Pin
Reference Out
Reference In
Analog Ground
Analog Power Supply. Normally +5V.
Noninverting Input Channel A1
Inverting Input Channel A1
Noninverting Input Channel B1
Inverting Input Channel B1
Noninverting Input Channel C1
Inverting Input Channel C1
Inverting Input Channel C0
Noninverting Input Channel C0
Inverting Input Channel B0
Noninverting Input Channel B0
Inverting Input Channel A0
Noninverting Input Channel A0
6
TI [ TEXAS INSTRUMENTS ]
