ADS7029-Q1 Datasheet, PDF (15/32 Pages) Texas Instruments – Small-Size, Low-Power, 8-Bit, 2-MSPS, SAR ADC

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ADS7029-Q1
SBAS811 – JANUARY 2017
Feature Description (continued)
8.3.3 ADC Transfer Function
The device output is in straight binary format. The device resolution for a single-ended input can be computed by
Equation 2:
1 LSB = V_REF / 2^N
where:
• V_REF = AVDD and
• N=8
(2)
Figure 32 and Table 1 show the ideal transfer characteristics for the device.
PFSC
MC + 1
MC
NFSC+1
NFSC
1 LSB
VREF
2
VREF _1LSB
2
V_IN
V_REF ± 1 LSB
Single-Ended Analog Input
(AINP ± AINM)
Figure 32. Ideal Transfer Characteristics
Table 1. Transfer Characteristics
INPUT VOLTAGE (AINP – AINM)
≤1 LSB
1 LSB to 2 LSBs
(V_REF / 2) to (V_REF / 2) + 1 LSB
(V_REF / 2) + 1 LSB to (V_REF / 2) + 2 LSBs
≥ V_REF – 1 LSB
CODE
NFSC
NFSC + 1
MC
MC + 1
PFSC
DESCRIPTION
Negative full-scale code
—
Mid code
—
Positive full-scale code
IDEAL OUTPUT CODE (HEX)
00
01
80
81
FF
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