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參數(shù)資料
| 型號： | AD7940BRMZ-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 20/20頁 |
| 文件大小： | 0K |
| 描述： | IC ADC 14BIT 100KSPS 8MSOP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 位數(shù)： | 14 |
| 采樣率（每秒）： | 100k |
| 數(shù)據(jù)接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 26.4mW |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-MSOP |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 輸入數(shù)目和類型： | 1 個單端，單極 |
| 其它名稱： | AD7940BRMZ-REEL7DKR |
AD7940
Rev. A | Page 9 of 20
TYPICAL PERFORMANCE CHARACTERISTICS
Figure 5 shows a typical FFT plot for the AD7940 at 100 kSPS
sample rate and 10 kHz input frequency. Figure 6 shows the
signal-to-(noise + distortion) ratio performance versus the
input frequency for various supply voltages while sampling at
100 kSPS with an SCLK of 2.5 MHz.
Figure 7 shows a graph of the total harmonic distortion versus
the analog input frequency for various supply voltages, while
Figure 8 shows a graph of the total harmonic distortion versus
the analog input frequency for various source impedances (see
the Analog Input section). Figure 9 and Figure 10 show the
typical INL and DNL plots for the AD7940.
03305-0-019
(dB)
–140
–120
–100
–80
–60
–40
–20
–160
0
10k
20k
30k
40k
FREQUENCY (kHz)
50k
0
VDD = 4.75V
FSAMPLE = 100kSPS
FIN = 10kHz
SNR = 84.48dB
SINAD = 84.35dB
THD = –98.97dB
SFDR = –100.84dB
Figure 5. AD7940 Dynamic Performance at 100 kSPS
03305-0-020
SINAD
(dB)
80
85
75
10
INPUT FREQUENCY (kHz)
100
90
FSAMPLE = 100kSPS
TA = 25°C
VDD = 5.25V
VDD = 4.75V
VDD = 2.5V
VDD = 4.3V
VDD = 3.6V
VDD = 3V
VDD = 2.7V
Figure 6. AD7940 SINAD vs. Analog Input Frequency
for Various Supply Voltages at 100 kSPS
03305-0-021
THD
(dB)
90
100
80
10
INPUT FREQUENCY (kHz)
100
110
85
95
105
FSAMPLE = 100kSPS
TA = 25°C
VDD = 3V
VDD = 2.7V
VDD = 4.3V
VDD = 2.5V
VDD = 5.25V
VDD = 4.75V
VDD = 3.6V
Figure 7. AD7940 THD vs. Analog Input Frequency
for Various Supply Voltages at 100 kSPS
03305-0-022
THD
(dB)
90
100
70
75
10
INPUT FREQUENCY (kHz)
100
110
85
80
95
105
FSAMPLE = 100kSPS
TA = 25°C
VDD = 4.75V
RIN = 10
RIN = 50
RIN = 100
RIN = 1000
Figure 8. AD7940 THD vs. Analog Input Frequency
for Various Source Impedances
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