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參數(shù)資料
| 型號： | ADS1271IPWR |
| 元件分類： | ADC |
| 英文描述： | 24 BIT WIDE BANDWIDTH ANALOG TO DIGITAL CONVERTER |
| 中文描述： | 24位寬帶模數(shù)轉(zhuǎn)換器 |
| 文件頁數(shù)： | 4/29頁 |
| 文件大?。?/td> | 381K |
| 代理商： | ADS1271IPWR |
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SBAS306A NOVEMBER 2004 REVISED DECEMBER 2004
www.ti.com
4
ELECTRICAL CHARACTERISTICS (continued)
All specifications at TA = 40
°
C to +105
°
C, AVDD = +5V, DVDD = +1.8V, fCLK = 27MHz, and VREF = +2.5V, unless otherwise noted.
UNITS
ADS1271
PARAMETER
MAX
TYP
MIN
TEST CONDITIONS
Voltage Reference Inputs
Reference input Voltage (VREF)
Negative reference input (VREFN)
VREF = VREFP – VREFN
0.5
2.5
2.65
V
AGND 0.1
VREFP 0.5
V
Positive reference input (VREFP)
VREFN + 0.5
AVDD + 0.1
V
k
k
k
Reference Input
impedance
High-Speed mode
4.2
High-Resolution mode
4.2
Low-Power mode
8.4
Digital Input/Output
VIH
VIL
VOH
VOL
Input leakage(4)
0.7 DVDD
DVDD
V
DGND
0.3 DVDD
V
IOH = 5mA
IOL = 5mA
0 < VIN DIGITAL < DVDD
0.8 DVDD
DVDD
V
DGND
0.2 DVDD
V
μ
A
MHz
±
10
27
Master clock rate (fCLK)
1
SPI format
24 fDATA
64 fDATA
128 fDATA
64 fDATA
fCLK
MHz
(fSCLK)(5)
High-Speed mode
64 fDATA
128 fDATA
64 fDATA
MHz
Serial clock rate
Frame-Sync format
High-Resolution mode
MHz
Low-Power mode
MHz
Power Supply
AVDD
4.75
5
5.25
V
DVDD
1.65
3.6
V
High-Speed mode
17
25
mA
High-Resolution mode
17
25
mA
AVDD current
Low-Power mode
6.3
9.5
mA
μ
A
μ
A
mA
Power-Down mode
T
≤
105
°
C
T
≤
85
°
C
1
70
1
10
High-Speed mode
3.5
6
High-Resolution mode
2.5
5
mA
DVDD current
Low-Power mode
1.8
3.5
mA
μ
A
μ
A
mW
Power-Down mode
T
≤
105
°
C, DVDD = 3.3V
T
≤
85
°
C, DVDD = 3.3V
1
70
1
20
High-Speed mode
92
136
Power dissipation
High-Resolution mode
90
134
mW
Low-Power mode
35
54
mW
Temperature Range
Specified
40
+105
C
Operating
40
+105
C
Storage
60
+150
C
(1)FSR = full-scale range = 2VREF.
(2)Minimum SNR is ensured by the limit of the
DC noise
specification.
(3)THD includes the first nine harmonics of the input signals.
(4)MODE and FORMAT pins excluded.
(5)See the text for more details on SCLK.
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