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ADS7955 Arkusz danych(PDF) 6 Page - Texas Instruments

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Numer części ADS7955
Szczegółowy opis  12/10/8-Bit, 1 MSPS, 16/12/8/4-Channel, Single-Ended, MicroPower, Serial Interface ADCs
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Producent  TI1 [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI1 - Texas Instruments

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ADS7950, ADS7951, ADS7952, ADS7953
ADS7954, ADS7955, ADS7956, ADS7957
ADS7958, ADS7959, ADS7960, ADS7961
SLAS605A – JUNE 2008 – REVISED JANUARY 2010
www.ti.com
ELECTRICAL CHARACTERISTICS, ADS7950/51/52/53 (continued)
+VA = 2.7 V to 5.25 V, +VBD = 1.7 V to 5.25 V, Vref = 2.5 V ± 0.1 V, TA = -40°C to 125°C, fsample = 1 MHz (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Vref reference voltage at REFP
(6)
2.0
2.5
3.0
V
Reference resistance
100
k
ALARM SETTING
Higher threshold range
0
FFC
Hex
Lower threshold range
0
FFC
Hex
DIGITAL INPUT/OUTPUT
Logic family
CMOS
VIH
0.7*(+VBD)
VIL
+VBD = 5 V
0.8
Logic level
VIL
+VBD = 3 V
0.4
V
VOH
At Isource = 200 mA
Vdd-0.2
VOL
At Isink = 200 mA
0.4
Data format MSB first
MSB First
POWER SUPPLY REQUIREMENTS
+VA supply voltage
2.7
3.3
5.25
V
+VBD supply voltage
1.7
3.3
5.25
V
At +VA = 2.7 to 3.6 V and 1MHz throughput
1.8
mA
At +VA = 2.7 to 3.6 V static state
1.05
mA
Supply current (normal mode)
At +VA = 4.7 to 5.25 V and 1 MHz throughput
2.3
3
mA
At +VA = 4.7 to 5.25 V static state
1.1
1.5
mA
Power-down state supply current
1
mA
+VBD supply current
+VA = 5.25V, fs = 1MHz
1
mA
Power-up time
1
mSec
Invalid conversions after power up or
1 Number
reset
s
TEMPERATURE RANGE
Specified performance
–40
125
°C
(6)
Device is designed to operate over Vref = 2.0 V to 3.0 V. However one can expect lower noise performance at Vref < 2.4 V. This is due to
SNR degradation resulting from lowered signal range.
ELECTRICAL CHARACTERISTICS, ADS7954/55/56/57
+VA = 2.7 V to 5.25 V, +VBD = 1.7 V to 5.25 V, Vref = 2.5 V ± 0.1 V, TA = -40°C to 125°C, fsample = 1 MHz (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ANALOG INPUT
Range 1
0
Vref
Full-scale input span(1)
V
Range 2 while 2Vref
≤ +VA
0
2*Vref
VREF
Range 1
–0.20
+0.20
Absolute input range
V
2*VREF
Range 2 while 2Vref
≤ +VA
–0.20
+0.20
Input capacitance
15
rF
Input leakage current
TA = 125°C
61
nA
SYSTEM PERFORMANCE
Resolution
10
Bits
No missing codes
10
Bits
(1)
Ideal input span; does not include gain or offset error.
6
Submit Documentation Feedback
Copyright © 2008–2010, Texas Instruments Incorporated
Product Folder Link(s): ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958,
ADS7959, ADS7960, ADS7961


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