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ADS7945 Datasheet(PDF) 8 Page - Texas Instruments

Part # ADS7945
Description  14-Bit, 2 MSPS, Dual-Channel, Differential/Single-Ended, Ultralow-Power Analog-to-Digital Converters
PDF  51 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

ADS7945 Datasheet(HTML) 8 Page - Texas Instruments

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GND
AVDD
REF
REFGND
PDEN
CHSEL
NC
NC
1
2
3
4
12
11
10
9
ADS7945
ADS7945
ADS7946
SBAS539B
– JUNE 2011 – REVISED SEPTEMBER 2011
www.ti.com
PIN CONFIGURATION ADS7945 (DIFFERENTIAL)
RTE PACKAGE
QFN-16
(TOP VIEW)
Table 2. PIN FUNCTIONS
PIN
NO.
PIN NAME
FUNCTION
DESCRIPTION
1
GND
Analog/digital
Power supply ground; all analog and digital signals are referred with respect to this pin
2
AVDD
Analog
ADC power supply
3
REF
Analog
ADC positive reference input; decouple this pin with REFGND
4
REFGND
Analog
Reference return; short to analog ground plane
5
AIN0P
Analog input
Positive analog input, channel 0
6
AIN0N
Analog input
Negative analog input, channel 0
7
AIN1N
Analog input
Negative analog input, channel 1
8
AIN1P
Analog input
Positive analog input, channel 1
9
NC
—
Not connected internally, it is recommended to externally short this pin to GND
10
NC
—
Not connected internally, it is recommended to externally short this pin to GND
This pin selects the analog input channel.
Low = Channel 0
11
CH SEL
Digital input
High = Channel 1
It is recommended to change the channel within a window of one clock; from half a clock after the CS
falling edge. This change ensures the settling on the multiplexer output before the sample start.
12
PDEN
Digital input
This pin enables a power-down feature if it is high at the CS rising edge
13
CS
Digital input
Chip select signal; active low
14
SCLK
Digital input
Serial SPI clock
15
SDO
Digital output
Serial data out
16
DVDD
Digital
Digital I/O supply
8
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Copyright
© 2011, Texas Instruments Incorporated
Product Folder Link(s): ADS7945 ADS7946



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