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ADS7947SRTER Datasheet(PDF) 10 Page - Texas Instruments

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Part # ADS7947SRTER
Description  12/10/8-Bit, 2MSPS, Dual-Channel, Unipolar, Pseudo-Differential, Ultralow-Power SAR Analog-to-Digital Converters
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

ADS7947SRTER Datasheet(HTML) 10 Page - Texas Instruments

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GND
AVDD
REF
REFGND
PDEN
CHSEL
NC
NC
1
2
3
4
12
11
10
9
ADS7947
ADS7948
ADS7949
SLAS708 – SEPTEMBER 2010
www.ti.com
PIN CONFIGURATION
RTE PACKAGE
QFN-16
(TOP VIEW)
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
Negative analog input, channel 0. Note that the allowable signal swing on this pin is
6
AIN0N
Analog input
±0.2V; this pin can be grounded.
Negative analog input, channel 1. Note that the allowable signal swing on this pin is
7
AIN1N
Analog input
±0.2V; this pin can be grounded.
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, high = channel 1.
11
CH SEL
Digital input
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
10
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Copyright © 2010, Texas Instruments Incorporated
Product Folder Link(s): ADS7947 ADS7948 ADS7949


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