參數(shù)資料
型號： TLV2556IPWR
廠商： TEXAS INSTRUMENTS INC
元件分類： ADC
英文描述： 11-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20
封裝： GREEN, PLASTIC, TSSOP-20
文件頁數(shù)： 34/37頁
文件大小： 729K
代理商： TLV2556IPWR
TLV2556
SLAS355A – DECEMBER 2001 – REVISED SEPTEMBER 2002
6
www.ti.com
external reference specifications
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Reference input voltage REF
VCC = 4.5 V to 5.5 V
–0.1
0
0.1
V
Reference input voltage, REF–
VCC = 2.7 V to 3.6 V
–0.1
0
0.1
V
Reference input voltage REF
VCC = 4.5 V to 5.5 V
2
VCC
V
Reference input voltage, REF+
VCC = 2.7 V to 3.6 V
2
VCC
V
External reference input voltage difference,
VCC = 4.5 V to 5.5 V
1.9
VCC
V
External reference in ut voltage difference,
(REF+) – (REF–)
VCC = 2.7 V to 3.6 V
1.9
VCC
V
External reference supply current
CS at0V
VCC = 4.5 V to 5.5 V
1
mA
External reference supply current
CS at 0 V
VCC = 2.7 V to 3.6 V
0.7
mA
V5 V
Static
1
M
Reference input impedance
VCC = 5 V
During sampling/conversion
6
9
k
Reference input impedance
V2 7 V
Static
1
M
VCC = 2.7 V
During sampling/conversion
6
9
k
All typical values are at VCC = 5 V, TA = 25°C.
NOTE: Add a 0.1-
F capacitor between REF+ and REF– pins when external reference is used.
internal reference specifications
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Reference input voltage, REF–
VCC = 2.7 V to 5.5 V, REF– = Analog GND
0
V
It
l
f
dlt
lt
VCC = 5.5 V,
Internal 4.096-Vref selected
3.95
4.065
4.25
Internal reference delta voltage,
(REF+) – (REF–)
VCC = 5.5 V,
Internal 2.048-Vref selected
1.95
2.019
2.1
V
(REF+) – (REF–)
VCC = 2.7 V,
Internal 2.048-Vref selected
1.95
2.019
2.1
V
Internal reference start up time
VCC = 5 V
With 10 F load
20
ms
Internal reference start-up time
VCC = 2.7 V
With 10-
F load
20
ms
Internal reference temperature coefficient
VCC = 2.7 V to 5.5 V
±50
PPM/
°C
All typical values are at VCC = 5 V, TA = 25°C.
NOTE: When an internal reference is used, the following conditions are required:
a) Add 0.1-
F and 10-F capacitors between REF+ and REF– pins.
b) REF– must be connected to analog GND (the ground pin of the ADC).
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