Datasheet
Table Of Contents
- FEATURES
- APPLICATIONS
- DESCRIPTION
- ABSOLUTE MAXIMUM RATINGS
- THERMAL INFORMATION
- ELECTRICAL CHARACTERISTICS: ADS7947 (12-Bit)
- ELECTRICAL CHARACTERISTICS: ADS7948 (10-Bit)
- ELECTRICAL CHARACTERISTICS: ADS7949 (8-Bit)
- TIMING DIAGRAM
- TIMING REQUIREMENTS
- PIN CONFIGURATION
- TYPICAL CHARACTERISTICS: ADS7947, ADS7948, ADS7949
- TYPICAL CHARACTERISTICS: ADS7947 (12-Bit)
- OVERVIEW
- DEVICE OPERATION
- APPLICATION INFORMATION
000 001¼
111 111¼
100 000¼
FSR 1LSB-
FSR/2
1LSB
AnalogInput
ADCCode
ADS7947
ADS7948
ADS7949
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SLAS708 –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 – AINxN) and is equal to the reference input voltage to the
ADC (V
REF
). 1LSB is equal to (V
REF
/2
N
) where N is the resolution of the ADC (for example, N = 12 for the
ADS7947).
Figure 42. ADS7947/8/9 Transfer Characteristics
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Product Folder Link(s): ADS7947 ADS7948 ADS7949