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| 型号： | 5962-9169101MXA |
| 厂商： | CRYSTAL SEMICONDUCTOR CORP |
| 元件分类： | ADC |
| 英文描述： | 2-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, CDIP28 |
| 封装： | CERDIP-28 |
| 文件页数： | 22/48页 |
| 文件大小： | 647K |
| 代理商： | 5962-9169101MXA |
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1/2 the throughput frequency without significant
errors due to aperture jitter.
Power Supply Rejection
The power supply rejection performance of the
CS5101A and CS5102A is enhanced by the on-
chip self-calibration and an "auto-zero" process.
Drifts in power supply voltages at frequencies
less than the calibration rate have negligible ef-
fect on the device’s accuracy. This is because the
CS5101A and CS5102A adjust their offset to
within a small fraction of an LSB during calibra-
tion. Above the calibration frequency the
excellent power supply rejection of the internal
amplifiers is augmented by an auto-zero process.
Any offsets are stored on the capacitor array and
are effectively subtracted once conversion is initi-
ated. Figure 23 shows power supply rejection of
the CS5101A and CS5102A in the bipolar mode
with the analog input grounded and a 300 mV p-
p ripple applied to each supply. Power supply
rejection improves by 6 dB in the unipolar mode.
CS5101A/CS5102A Improvements Over Ear-
lier CS5101/CS5102
The CS5101A/CS5102A are improved versions
of the earlier CS5101/CS5102 devices. Primary
improvements are:
1) Improved DNL at high temperature
(>70
°C)
2) Improved input slew rate, yielding im-
p ro v ed full scale settlin g b etween
conversions.
3) Mo difyin g th e p revio us SSH pin to
SSH/SDL (Simultaneous Sample Hold/Se-
rial Data Latch). The SSH/SDL new
function provides a logic signal which
frames the 16 data bits in SSC and FRN
serial modes. This signal is ideal for easy
interface to serial to parallel shift registers
(74HC595) and to DSP serial ports.
Table 3 summarizes all the improvements.
Power Supply Ripple Frequency
Po
w
e
rS
uppl
y
R
e
je
ct
io
n
(
d
B
)
90
80
70
60
50
40
30
20
1 kHz
10 kHz
100 kHz
1 MHz
Figure 23. Power Supply Rejection
CS5101A CS5102A
DS45F2
29
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相关代理商/技术参数 |
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