參數(shù)資料
型號(hào): AD7472
英文描述: AD7470/AD7472: 1.75MSPS. 4mW 10-Bit/12-Bit SAR ADC Data Sheet (Rev. A. 3/00)
中文描述: AD7470/AD7472:1.75MSPS。 4mW變10-Bit/12-Bit SAR型ADC數(shù)據(jù)手冊(cè)(版本A 3 / 00)
文件頁(yè)數(shù): 10/20頁(yè)
文件大小: 729K
代理商: AD7472
REV. A
–10–
AD7476A/AD7477A/AD7478A
FREQUENCY – kHz
5
–55
–115
0
500
50
S
100
150
200
250
300
350
400
450
–15
–35
–75
–95
8192 POINT FFT
V
DD
= 2.7V
f
SAMPLE
= 1MSPS
f
SINAD = 72.05dB
THD = –82.87dB
SFDR = –87.24dB
TPC 1. AD7476A Dynamic Performance at 1 MSPS
FREQUENCY – kHz
–45
–105
S
–5
–25
–65
–85
8192 POINT FFT
V
DD
= 2.35V
f
SAMPLE
= 1MSPS
f
SINAD = 61.67dB
THD = –79.59dB
SFDR = –82.93dB
0
500
50
100
150
200
250
300
350
400
450
TPC 2. AD7477A Dynamic Performance at 1 MSPS
FREQUENCY – kHz
5
–25
–55
S
–5
–15
–35
–45
8192 POINT FFT
V
DD
= 2.35V
f
SAMPLE
= 1MSPS
f
SINAD = 49.77dB
THD = –75.51dB
SFDR = –70.71dB
0
500
50
100
150
200
250
300
350
400
450
–75
–65
–85
–95
TPC 3. AD7478A Dynamic Performance at 1 MSPS
FREQUENCY – kHz
–66
–69
–72
10
1000
S
100
–67
–68
–70
–71
–73
–74
V
DD
= 5.25V
V
DD
= 2.35V
V
DD
= 2.7V
V
DD
= 4.75V
V
DD
= 3.6V
TPC 4. AD7476A SINAD vs. Input Frequency at 1 MSPS
PERFORMANCE CURVES
TPC 1, TPC 2, and TPC 3 each show a typical FFT plot for
the AD7476A, AD7477A, and AD7478A, respectively, at 1
MSPS sample rate and 100 kHz input frequency.
TPC 4 shows the signal-to-(noise + distortion) ratio performance
versus the input frequency for various supply voltages while sampling
at 1 MSPS with an SCLK frequency of 20 MHz for the AD7476A.
TPC 5 and TPC 6 show INL and DNL performance for the
AD7476A.
TPC 7 shows a graph of the total harmonic distortion versus the
analog input frequency for different source impedances when
using a supply voltage of 3.6 V and sampling at a rate of 1 MSPS
(see Analog Input section).
TPC 8 shows a graph of the total harmonic distortion versus the
analog input signal frequency for various supply voltages while
sampling at 1 MSPS with an SCLK frequency of 20 MHz.
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