Datasheet

ADS1194, ADS1196
ADS1198
www.ti.com SBAS471C –APRIL 2010– REVISED NOVEMBER 2011
PAG PIN ASSIGNMENTS (continued)
NAME TERMINAL FUNCTION DESCRIPTION
TESTP_PACE_OUT1 17 Analog input/buffer output Internal test signal/single-ended buffer output based on register settings
TESTN_PACE_OUT2 18 Analog input/output Internal test signal/single-ended buffer output based on register settings
AVDD 19 Supply Analog supply
AVSS 20 Supply Analog ground
AVDD 21 Supply Analog supply
AVDD 22 Supply Analog supply
AVSS 23 Supply Analog ground
VREFP 24 Analog input/output Positive reference voltage
VREFN 25 Analog input Negative reference voltage
VCAP4 26 Analog output Analog bypass capacitor
NC 27 — No connection; leave floating
VCAP1 28 — Analog bypass capacitor
NC 29 — No connection; leave floating
VCAP2 30 — Analog bypass capacitor
RESV1 31 Digital input Reserved for future use; must tie to logic low (DGND)
AVSS 32 Supply Analog ground
DGND 33 Supply Digital ground
DIN 34 Digital input SPI data in
PWDN 35 Digital input Power-down; active low
RESET 36 Digital input System reset; active low
CLK 37 Digital input/output External master clock input or internal clock output
START 38 Digital input Start conversion
CS 39 Digital input SPI chip select; active low
SCLK 40 Digital input SPI clock
DAISY_IN 41 Digital input Daisy-chain input. If not used, short to logic zero (DGND).
GPIO1 42 Digital input/output General-purpose input/output pin
DOUT 43 Digital output SPI data out
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
DRDY 47 Digital output Data ready; active low
DVDD 48 Supply Digital power supply
DGND 49 Supply Digital ground
DVDD 50 Supply Digital power supply
DGND 51 Supply Digital ground
CLKSEL 52 Digital input Master clock select
AVSS1 53 Supply Analog ground
AVDD1 54 Supply Analog supply
VCAP3 55 Analog Analog bypass capacitor, internally generated AVDD + 1.9V
AVDD 56 Supply Analog supply
AVSS 57 Supply Analog ground
AVSS 58 Supply Analog ground for charge pump
AVDD 59 Supply Analog supply for charge pump
RLDREF 60 Analog input Right leg drive noninverting input
RLDINV 61 Analog input/output Right leg drive inverting input
RLDIN 62 Analog input Right leg drive input to MUX
RLDOUT 63 Analog output Right leg drive output
WCT 64 Analog output Wilson Center Terminal output
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