ADS8028 Datasheet, PDF (7/34 Pages) Texas Instruments – 12-Bit, 1-MSPS, 8-Channel, SAR ADC

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ADS8028
PIN CONFIGURATIONS
RTJ PACKAGE⁽¹⁾
QFN-20
(TOP VIEW)
SBAS549B – MAY 2011 – REVISED MARCH 2012
AIN3 1
AIN4 2
AIN5 3
AIN6 4
AIN7 5
Thermal Pad
15 SCLK
14 DOUT
13 DIN
12 TM_BUSY
11 CS
(1) The exposed thermal pad on the bottom of the package must be soldered to the printed circuit board (PCB) ground for proper
functionality and heat dissipation.
NOTE: NC = no connection.
PIN ASSIGNMENTS
NAME
PIN
FUNCTION
DESCRIPTION
AGND
6
Supply
Analog ground
AIN0
18
Analog input
Analog input channel 0
AIN1
19
Analog input
Analog input channel 1
AIN2
20
Analog input
Analog input channel 2
AIN3
1
Analog input
Analog input channel 3
AIN4
2
Analog input
Analog input channel 4
AIN5
3
Analog input
Analog input channel 5
AIN6
4
Analog input
Analog input channel 6
AIN7
5
Analog input
Analog input channel 7
AVDD
10
Supply
ADC operation supply voltage
CS
11
Digital input
Chip select; active low logic input
DGND
9
Supply
Digital ground
DIN
13
Digital input
SPI data input
DOUT
14
Digital output
SPI data output
DVDD
16
Supply
ADC interface supply voltage
NC
8
—
This pin has no internal connection. Any passive component connected to this
pin does not affect device functionality.
PD/RST
17
Digital input
Dual function pin for power-down and reset operation; active low logic input
REF
7
Analog input/output
ADC internal reference output or ADC external reference input
SCLK
15
Digital input
SPI clock
Thermal pad
—
Thermal pad
Exposed thermal pad; this pin should be soldered to the PCB ground for proper
functionality and heat dissipation
TM_BUSY
12
Digital input
Busy output; this pin transitions high and remains high during conversion for
temperature sensor input
Copyright © 2011–2012, Texas Instruments Incorporated
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