adc161s626cimmx National Semiconductor Corporation, adc161s626cimmx Datasheet - Page 19

• Manufacturer Part Number: adc161s626cimmx
• Description: 16-bit, 50 To 250 Ksps, Differential Input, Micropower Adc
• Manufacturer: National Semiconductor Corporation

erence voltages in the respective application drawings. The
application in Figure 19 is limited to a V
because of the single-ended configuration of the differential
7.3 Current Sensing Application
Figure 20 shows an example of interfacing a current trans-
ducer to the ADC161S626. The current transducer converts
an input current into a voltage that is converted by the ADC.
Since the output voltage of the current transducer is single-
ended and centered around a common-mode voltage (V
of 2.5V, the ADC161S626 is configured with the output of the
transducer driving the non-inverting input and V
transducer driving the inverting input. The output of the trans-
FIGURE 20. Interfacing the ADC161S626 to a Current Transducer
FIGURE 19. Single-Ended Application for a Bridge Sensor
FIGURE 18. Differential Application for a Bridge Sensor
REF
of 2.5V or less
CM
of the
CM
)
19
ADC161S626,
ADC161S626 and the LM4120's are all powered from the
same +5V voltage source.
ducer has an output range of ±2.5V around V
a result, a series reference voltage of 2.5V is connected to the
ADC161S626. This will allow all of the codes of the
ADC161S626 to be available for the application. This config-
uration of the ADC161S626 is referred to as a single-ended
application of a differential ADC. All of the elements in the
application are conveniently powered by the same +5V power
supply, keeping circuit complexity and cost to a minimum.
as
discussed
30073438
in
30073466
Section
CM
www.national.com
30073488
of 2.5V. As
2.2.
The