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参数资料
| 型号： | TC7129CPL |
| 元件分类： | ADC |
| 英文描述： | 1-CH DUAL-SLOPE ADC, ACCESS, PDIP40 |
| 封装： | PLASTIC, DIP-40 |
| 文件页数： | 3/17页 |
| 文件大小： | 185K |
| 代理商： | TC7129CPL |
11
TC7129
4-1/2 DIGIT ANALOG-TO-DIGITAL
CONVERTER WITH ON-CHIP LCD DRIVERS
INTEGRATE
DEINTEGRATE
TIME
CLOCK PULSES
OVERSHOOT DUE TO ZERO CROSSING
BETWEEN CLOCK PULSES
INTEGRATOR RESIDUE VOLTAGE
OVERSHOOT CAUSED BY
COMPARATOR DELAY OF
1 CLOCK PULSE
Figure 10.
Accuracy Errors in Dual-Slope Conversion
Figure 11. Integrator Waveform
INT1
INTEGRATE
DE1
DEINTEGRATE
REST X10
ZERO
INTEGRATE
AND LATCH
DE2 REST X10
DE3
ZERO INTEGRATE
INTEGRATOR
RESIDUAL VOLTAGE
TC7129
NOTE: Shaded area greatly expanded
in time and amplitude.
Inside the TC7129
Figure 12 shows a simplified block diagram of the
TC7129.
Integrator Section
The integrator section includes the integrator, compara-
tor, input buffer amplifier, and analog switches used to
change the circuit configuration during the separate mea-
surement phases described earlier.
Digital Auto-Zeroing
To eliminate the effect of amplifier offset errors, the
TC7129 uses a digital auto-zeroing technique. After the
input voltage is measured as described above, the mea-
surement is repeated with the inputs shorted internally. The
reading with inputs shorted is a measurement of the internal
errors and is subtracted from the previous reading to obtain
a corrected measurement. Digital auto-zeroing eliminates
the need for an external auto-zeroing capacitor used in other
ADCs.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC7129CPL713 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:4-1/2 Digit Analog-to-Digital Converters with On-Chip LCD Drivers |
| TC7129IJL713 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:4-1/2 Digit Analog-to-Digital Converters with On-Chip LCD Drivers |
| TC7129IKW713 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:4-1/2 Digit Analog-to-Digital Converters with On-Chip LCD Drivers |
| TC7129ILW713 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:4-1/2 Digit Analog-to-Digital Converters with On-Chip LCD Drivers |
| TC7129IPL713 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:4-1/2 Digit Analog-to-Digital Converters with On-Chip LCD Drivers |
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