Datasheet

ADS131E04
ADS131E06
ADS131E08
SBAS561A –JUNE 2012–REVISED APRIL 2013 www.ti.com
PIN ASSIGNMENTS (continued)
NAME TERMINAL FUNCTION DESCRIPTION
GPIO1 42 Digital input/output General-purpose input/output pin
GPIO2 44 Digital input/output General-purpose input/output pin
GPIO3 45 Digital input/output General-purpose input/output pin
GPIO4 46 Digital input/output General-purpose input/output pin
IN1N
(1)
15 Analog input Differential analog negative input 1
IN1P
(1)
16 Analog input Differential analog positive input 1
IN2N
(1)
13 Analog input Differential analog negative input 2
IN2P
(1)
14 Analog input Differential analog positive input 2
IN3N
(1)
11 Analog input Differential analog negative input 3
IN3P
(1)
12 Analog input Differential analog positive input 3
IN4N
(1)
9 Analog input Differential analog negative input 4
IN4P
(1)
10 Analog input Differential analog positive input 4
Differential analog negative input 5
IN5N
(1)
7 Analog input
(ADS131E06 and ADS131E08 only)
IN5P
(1)
8 Analog input Differential analog positive input 5 (ADS131E06 and ADS131E08 only)
Differential analog negative input 6
IN6N
(1)
5 Analog input
(ADS131E06 and ADS131E08 only)
IN6P
(1)
6 Analog input Differential analog positive input 6 (ADS131E06 and ADS131E08 only)
IN7N
(1)
3 Analog input Differential analog negative input 7 (ADS131E08 only)
IN7P
(1)
4 Analog input Differential analog positive input 7 (ADS131E08 only)
IN8N
(1)
1 Analog input Differential analog negative input 8 (ADS131E08 only)
IN8P
(1)
2 Analog input Differential analog positive input 8 (ADS131E08 only)
NC 27, 29, 62, 64 — No connection, leave floating
OPAMPN 61 Analog Op amp inverting input
OPAMPP 60 — Op amp noninverting input
OPAMPOUT 63 Analog Op amp output
PWDN 35 Digital input Power-down; active low
RESET 36 Digital input System reset; active low
RESV1 31 Digital input Reserved for future use; must tie to logic low (DGND)
SCLK 40 Digital input SPI clock
START 38 Digital input Start conversion
TESTN
(1)
18 Analog input/output Internal test signal, negative signal
TESTP
(1)
17 Analog input/output Internal test signal, positive signal
VCAP1 28 Analog input/output Analog bypass capacitor
VCAP2 30 — Analog bypass capacitor
VCAP3 55 — Analog bypass capacitor
VCAP4 26 Analog output Analog bypass capacitor
VREFN 25 Analog input Negative reference voltage
VREFP 24 Analog input/output Positive reference voltage
(1) Connect unused terminals to AVDD.
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