參數(shù)資料
型號(hào): AD7942BCPZRL
廠商: Analog Devices Inc
文件頁(yè)數(shù): 24/24頁(yè)
文件大?。?/td> 0K
描述: IC ADC 14BIT SAR 250KSPS 10LFCSP
標(biāo)準(zhǔn)包裝: 5,000
系列: PulSAR®
位數(shù): 14
采樣率(每秒): 250k
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): 1.25mW
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: 10-WFDFN 裸露焊盤,CSP
供應(yīng)商設(shè)備封裝: 10-LFCSP-WD(3x3)
包裝: 帶卷 (TR)
輸入數(shù)目和類型: 1 個(gè)偽差分,單極
配用: EVAL-AD7942CB-ND - BOARD EVALUATION FOR AD7942
AD7942
Rev. B | Page 9 of
24
TYPICAL PERFORMANCE CHARACTERISTICS
POSITIVE INL = +0.22LSB
NEGATIVE INL = –0.34LSB
1.00
0.75
0.50
0.25
0
–0.50
–0.75
–1.00
–0.25
IN
L
(
L
S
B
)
0
4096
8192
12,288
16,384
CODE
04
65
7-
00
5
Figure 5. Integral Nonlinearity vs. Code
129,941
150,000
100,000
50,000
0
CO
UN
T
S
0
915
216
0
1FFD
1FFE
1FFF
2000
2001
2002
2003
CODE IN HEX
VDD = VREF = 2.5V
04
65
7-
00
6
Figure 6. Histogram of a DC Input at the Code Center
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
AM
P
L
IT
UDE
(
d
B
o
fF
u
ll
S
cal
e)
0
25
50
75
100
125
FREQUENCY (kHz)
16,384 POINT FFT
VDD = VREF = 5V
fS = 250kSPS
fIN = 20.43kHz
SNR = 85.1dB
THD = –105dB
SFDR = –105.9dB
04
65
7-
0
07
Figure 7. FFT Plot
POSITIVE DNL = +0.24LSB
NEGATIVE DNL = –0.12LSB
1.00
0.75
0.50
0.25
0
–0.50
–0.75
–1.00
–0.25
DN
L
(
L
S
B
)
0
4096
8192
12,288
16,384
CODE
04
65
7-
00
8
Figure 8. Differential Nonlinearity vs. Code
150,000
100,000
50,000
0
CO
UNT
S
00
0
1FFD
1FFE
1FFF
2000
2001
2002
2003
CODE IN HEX
VDD = VREF = 5V
131,072
04
65
7-
00
9
Figure 9. Histogram of a DC Input at the Code Center
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
AM
P
L
IT
UDE
(
d
B
o
fF
u
ll
S
cal
e)
0
25
50
75
100
125
FREQUENCY (kHz)
16,384 POINT FFT
VDD = VREF = 2.5V
fS = 250kSPS
fIN = 20.43kHz
SNR = 84.2dB
THD = –101.7dB
SFDR = –104.3dB
04
65
7-
0
10
Figure 10. FFT Plot
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