参数资料
型号: TLC320AC01CPMR
厂商: TEXAS INSTRUMENTS INC
元件分类: 模拟信号调理
英文描述: SPECIALTY ANALOG CIRCUIT, PQFP64
封装: PLASTIC, QFP-64
文件页数: 43/93页
文件大小: 601K
代理商: TLC320AC01CPMR
4–1
4
Parameter Measurement Information
_
+
IN + or AUX IN +
IN – or AUX IN –
To Multiplexer
Rfb
_
+
Rfb = R for DS03 = 0 and DS02 = 1
Rfb = 2R for DS03 = 1 and DS02 = 0
Rfb = 4R for DS03 = 1 and DS02 = 1
R = 100 k
nominal
R
Figure 4 – 1. IN + and IN – Gain-Control Circuitry
Table 4 – 1. Gain Control (Analog Input Signal Required for
Full-Scale Bipolar A /D-Conversion 2s Complement)
INPUT CONFIGURATION
CONTROL REGISTER 4
ANALOG INPUT
A /D CONVERSION
INPUT CONFIGURATION
DS03
DS02
ANALOG INPUT
RESULT
0
All
Squelch
Differential configuration
Analog input = IN +
IN
0
1
VID = ± 3 V
±Full scale
Analog input = IN + – IN –
= AUX IN + – AUX IN –
1
0
VID = ± 1.5 V
±Full scale
AUX IN +
AUX IN
1
VID = ± 0.75 V
±Full scale
§
0
All
Squelch
Single-ended configuration§
Analog input
IN +
V
0
1
VI = ± 1.5 V
±Half scale
Analog input = IN + – VMID
= AUX IN + – VMID
1
0
VI = ± 1.5 V
±Full scale
= AUX IN +
VMID
1
VI = ± 0.75 V
±Full scale
VDD = 5 V
VID = differential input voltage, VI = input voltage referenced to ADC VMID with IN– or AUX IN– connected to
ADC VMID. In order to minimize distortion, it is recommended that the analog input not exceed 0.1 dB below full scale.
§ For single-ended inputs, the analog input voltage should not exceed the supply rails. All single-ended inputs should be
referenced to the internal reference voltage, ADC VMID, for best common-mode performance.
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