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參數(shù)資料
| 型號： | AD7940-DBRD |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 20/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVAL FOR AD7940 STAMP SPI |
| 標(biāo)準(zhǔn)包裝： | 1 |
| ADC 的數(shù)量： | 1 |
| 位數(shù)： | 14 |
| 采樣率（每秒）： | 100k |
| 數(shù)據(jù)接口： | 串行 |
| 輸入范圍： | 0 ~ Vdd |
| 在以下條件下的電源（標(biāo)準(zhǔn)）： | 17mW @ 100kSPS & 5V |
| 工作溫度： | -40°C ~ 85°C |
| 已用 IC / 零件： | AD7940 |
| 已供物品： | 板 |
| 相關(guān)產(chǎn)品： | AD7940BRJZ-REEL7DKR-ND - IC ADC 14BIT 100KSPS SOT-23-6 AD7940BRJZ-REEL7CT-ND - IC ADC 14BIT 100KSPS SOT-23-6 AD7940BRJZ-REEL7TR-ND - IC ADC 14BIT 100KSPS SOT-23-6 AD7940BRM-ND - IC ADC 14BIT UNIPOLAR 8-MSOP AD7940BRM-REEL7TR-ND - IC ADC 14BIT UNIPOLAR 8-MSOP |
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.
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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