Datasheet

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