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| ADS7947_14 Datasheet, PDF (21/39 Pages) Texas Instruments – 12/10/8-Bit, 2MSPS, Dual-Channel, Unipolar, Pseudo-Differential, Ultralow-Power SAR Analog-to-Digital Converters | |||
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ADS7947
ADS7948
ADS7949
SLAS708 â SEPTEMBER 2010
ADC TRANSFER FUNCTION
The ADS7947 (12-bit), ADS7948 (10-bit), and ADS7949 (8-bit) devices are unipolar, pseudo-differential input.
The ADC output is in straight binary format. Figure 42 shows ideal characteristics for this family of devices. Here,
FSR is the full-scale range for the ADC input (AINxP â AINxN) and is equal to the reference input voltage to the
ADC (VREF). 1LSB is equal to (VREF/2N) where N is the resolution of the ADC (for example, N = 12 for the
ADS7947).
111¼111
100¼000
000¼001
1LSB
FSR/2
Analog Input
FSR - 1LSB
Figure 42. ADS7947/8/9 Transfer Characteristics
Copyright © 2010, Texas Instruments Incorporated
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Product Folder Link(s): ADS7947 ADS7948 ADS7949
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