Datasheet

Data Sheet AD7193
Rev. D | Page 13 of 56
08367-065
NOTES
1. NC = NO CONNECT.
2. CONNECT EXPOSED PAD TO AGND.
24
DV
DD
23 AV
DD
22
DGND
21
AGND
20
BPDSW
19
NC
18
REFIN1(–)
17 REFIN1(+)
1
2
3
4
5
6
7
8
P3
P2
P1/REFIN2(+)
P0/REFIN2(–)
NC
NC
NC
AINCOM
9
10
11
12 13 14 15 16
AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 AIN8
32 31 30 29 28 27 26 25
CS SCLK MCLK2 MCLK1 DIN DOUT/RDY NC SYNC
TOP VIEW
(Not to Scale)
AD7193
Figure 6. 32-Lead LFCSP Pin Configuration
Table 6. 32-Lead LFCSP Pin Function Descriptions
Pin No. Mnemonic Description
1 P3
Digital Output Pin. This pin can function as a general-purpose output bit referenced between AV
DD
and
AGND.
2 P2
Digital Output Pin. This pin can function as a general-purpose output bit referenced between AV
DD
and
AGND.
3 P1/REFIN2(+)
Digital Output Pin/Positive Reference Input. This pin functions as a general-purpose output bit referenced
between AV
DD
and AGND. When the REFSEL bit in the configuration register = 1, this pin functions as
REFIN2(+). An external reference can be applied between REFIN2(+) and REFIN2(−). REFIN2(+) can lie
anywhere between AV
DD
and AGND + 1 V. The nominal reference voltage, (REFIN2(+) − REFIN2(−)), is AV
DD
, but
the part functions with a reference from 1 V to AV
DD
.
4 P0/REFIN2(−)
Digital Output Pin/Negative Reference Input. This pin functions as a general-purpose output bit referenced
between AV
DD
and AGND. When the REFSEL bit in the configuration register = 1, this pin functions as
REFIN2(−). This reference input can lie anywhere between AGND and AV
DD
− 1 V.
5, 6, 7, 19,
26
NC No Connect. Tie these pins to AGND.
8 AINCOM
Analog Input AIN1 to Analog Input AIN8 are referenced to this input when configured for pseudo differential
operation.
9 AIN1
Analog Input. This pin can be configured as the positive input of a fully differential input pair when used with
AIN2 or as a pseudo differential input when used with AINCOM.
10 AIN2
Analog Input. This pin can be configured as the negative input of a fully differential input pair when used
with AIN1 or as a pseudo differential input when used with AINCOM.
11 AIN3
Analog Input. This pin can be configured as the positive input of a fully differential input pair when used with
AIN4 or as a pseudo differential input when used with AINCOM.
12 AIN4
Analog Input. This pin can be configured as the negative input of a fully differential input pair when used
with AIN3 or as a pseudo differential input when used with AINCOM.
13 AIN5
Analog Input. This pin can be configured as the positive input of a fully differential input pair when used with
AIN6 or as a pseudo differential input when used with AINCOM.
14 AIN6
Analog Input. This pin can be configured as the negative input of a fully differential input pair when used
with AIN5 or as a pseudo differential input when used with AINCOM.
15 AIN7
Analog Input. This pin can be configured as the positive input of a fully differential input pair when used with
AIN8 or as a pseudo differential input when used with AINCOM.
16 AIN8
Analog Input. This pin can be configured as the negative input of a fully differential input pair when used
with AIN7 or as a pseudo differential input when used with AINCOM.
17 REFIN1(+)
Positive Reference Input. An external reference can be applied between REFIN1(+) and REFIN1(−). REFIN1(+)
can lie anywhere between AV
DD
and AGND + 1 V. The nominal reference voltage, (REFIN1(+) − REFIN1(−)), is
AV
DD
, but the part functions with a reference from 1 V to AV
DD
.
18 REFIN1(−) Negative Reference Input. This reference input can lie anywhere between AGND and AV
DD
− 1 V.
20 BPDSW Bridge Power-Down Switch to AGND.