VDD = 2.5 V to 5.5 V, VREF
參數(shù)資料
型號(hào): AD7949BCPZRL7
廠商: Analog Devices Inc
文件頁(yè)數(shù): 2/32頁(yè)
文件大?。?/td> 0K
描述: IC ADC 14BIT 250KSPS 8CH 20LFCSP
產(chǎn)品培訓(xùn)模塊: Power Line Monitoring
產(chǎn)品變化通告: Startup Circuitry Design Improvement Change 15/April/2009
標(biāo)準(zhǔn)包裝: 1,500
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): 15.5mW
電壓電源: 單電源
工作溫度: -40°C ~ 85°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 20-VFQFN 裸露焊盤(pán),CSP
供應(yīng)商設(shè)備封裝: 20-LFCSP-VQ
包裝: 帶卷 (TR)
輸入數(shù)目和類(lèi)型: *
AD7949
Data Sheet
Rev. D | Page 10 of 32
TYPICAL PERFORMANCE CHARACTERISTICS
VDD = 2.5 V to 5.5 V, VREF = 2.5 V to 5 V, VIO = 2.3 V to VDD, unless otherwise noted.
1.0
0.5
0
–0.5
–1.0
0
4,096
8,192
12,288
16,384
IN
L
(
L
S
B
)
CODES
07
35
1-
0
05
Figure 5. Integral Nonlinearity vs. Code, VREF = VDD = 5 V
300k
250k
200k
150k
100k
50k
0
1FFC
CO
UN
T
S
CODE IN HEX
1FFD
1FFE
1FFF
2000
2001
2002
2003
00
0
1
0
00
0
VREF = VDD = 5V
261,120
07
35
1-
00
6
Figure 6. Histogram of a DC Input at Code Center
0
–20
–40
–60
–80
–100
–120
–140
–160
050
25
75
100
125
A
M
P
L
IT
U
D
E
(
d
B
o
fF
u
ll-
S
c
a
le
)
FREQUENCY (kHz)
VREF = VDD = 5V
fS= 250kSPS
fIN = 19.9kHz
SNR = 85.3dB
SINAD = 85.2dB
THD = –100dB
SFDR = 103dB
SECOND HARMONIC = –110dB
THIRD HARMONIC = –103dB
07
35
1-
0
07
Figure 7. 20 kHz FFT, VREF = VDD = 5 V
DN
L
(
L
S
B
)
CODES
0
4,096
8,192
12,288
16,384
1.0
0.5
0
–0.5
–1.0
07
35
1-
0
08
Figure 8. Differential Nonlinearity vs. Code, VREF = VDD = 5 V
CO
UN
T
S
CODE IN HEX
259,473
300k
250k
200k
150k
100k
50k
0
1FFC 1FFD 1FFE 1FFF
2000
2001
2002
2003
2004
00
0
955
693
00
0
VREF = VDD = 2.5V
07
35
1-
00
9
Figure 9. Histogram of a DC Input at Code Center
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
050
25
75
100
A
M
P
L
IT
U
D
E
(
d
B
o
fF
u
ll-
S
c
a
le
)
FREQUENCY (kHz)
VREF = VDD = 2.5V
fs= 200kSPS
fIN = 19.9kHz
SNR = 84.2dB
SINAD = 82.4dB
THD = –84dB
SFDR = 85dB
SECOND HARMONIC = –100dB
THIRD HARMONIC = –85dB
07
35
1-
0
10
Figure 10. 20 kHz FFT, VREF = VDD = 2.5 V
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