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5 Device Comparison Table
PRODUCT
ADS8694
ADS8698
6 Pin Configuration and Functions
SDI
1
RST/PD
2
3
DAISY
4
REFSEL
REFIO
5
6
REFGND
7
REFCAP
8
AGND
AVDD
9
AUX_IN
10
AUX_GND
11
NC
12
NC
13
NC
14
NC
15
AIN_0P
16
AIN_0GND
17
AIN_1P
18
AIN_1GND
19
PIN
NAME
NO.
ADS8694
ADS8698
1
SDI
2
RST/PD
3
DAISY
4
REFSEL
5
REFIO
6
REFGND
7
REFCAP
8
AGND
9
AVDD
10
AUX_IN
11
AUX_GND
Copyright © 2015, Texas Instruments Incorporated
RESOLUTION (Bits)
18
18
DBT Package
38-Pin TSSOP
Top View (Not to Scale)
38
CS
37
SCLK
36
SDO
35
ALARM
34
DVDD
33
DGND
32
AGND
31
AGND
30
AVDD
ADS8694
29
AGND
28
AGND
27
NC
NC
26
25
NC
24
NC
23 AIN_3P
22
AIN_3GND
21
AIN_2P
20
AIN2_GND
Pin Functions
I/O
Digital input
Data input for serial communication.
Active low logic input.
Digital input
Dual functionality to reset or power-down the device.
Digital input
Chain the data input during serial communication in daisy-chain mode.
Active low logic input to enable the internal reference.
When low, the internal reference is enabled;
Digital input
REFIO becomes an output that includes the V
When high, the internal reference is disabled;
REFIO becomes an input to apply the external V
Analog input, output Internal reference output and external reference input pin. Decouple with REFGND on pin 6.
Reference GND pin; short to the analog GND plane.
Power supply
Decouple with REFIO on pin 5 and REFCAP on pin 7.
Analog output
ADC reference decoupling capacitor pin. Decouple with REFGND on pin 6.
Power supply
Analog ground pin. Decouple with AVDD on pin 9.
Power supply
Analog supply pin. Decouple with AGND on pin 8.
Analog input
Auxiliary input channel: positive input. Decouple with AUX_GND on pin 11.
Analog input
Auxiliary input channel: negative input. Decouple with AUX_IN on pin 10.
Product Folder Links:
CHANNELS
4, single-ended
8, single-ended
SDI
1
RST/PD
2
3
DAISY
4
REFSEL
REFIO
5
6
REFGND
7
REFCAP
8
AGND
AVDD
9
ADS8698
AUX_IN
10
AUX_GND
11
AIN_6P
12
AIN_6GND
13
AIN_7P
14
AIN_7GND
15
AIN_0P
16
AIN_0GND
17
AIN_1P
18
AIN_1GND
19
DESCRIPTION
voltage.
REF
REF
Submit Documentation Feedback
ADS8694 ADS8698
ADS8694, ADS8698
SBAS686 – JULY 2015
SAMPLE RATE (kSPS)
500
500
38
CS
37
SCLK
36
SDO
35
ALARM
34
DVDD
33
DGND
32
AGND
31
AGND
30
AVDD
29
AGND
28
AGND
27
AIN_5P
AIN_5GND
26
25
AIN_4P
24
AIN_4GND
23 AIN_3P
22
AIN_3GND
21
AIN_2P
20
AIN2_GND
voltage.
3
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