Datasheet

TPS2480
TPS2481
SLUS939B –APRIL 2010–REVISED DECEMBER 2010 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
over operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Input
PGA = x 1 0 ±40
PGA = x 2 0 ±80
Full-scale current sense
mV
(input) voltage range
PGA = x 4 0 ±160
PGA = x 8 0 ±320
BRNG = 1 0 32
Bus voltage (input voltage)
V
range
BRNG = 0 0 16
Common-mode rejection
VIN+ = 0 V to 26 V 100 120 dB
CMRR
PGA = x 1 ±10 ±100
PGA = x 2 ±20 ±125
Input offset mV
PGA = x 4 ±30 ±150
V
OS
PGA = x 8 ±40 ±200
Temp stability 0.1 mV/°C
PSRR VS = 3 V to 5.5 V 10 mV/V
CSA gain error ±0.04%
Gain
CSA
Temp stability 10 ppm
I
VNP
20 mA
Input bias current Active mode
I
VINM
20 || 320 mA || kΩ
I
LEAKAGE
I
VNP
, I
VINM
Power down mode, leakage input current 0.1 ±0.5 mA
A/D Converter
Shunt voltage 10 mV
Step Size 1 LSB
Bus voltage 4 mV
Current
Current measurement Error ±0.2% ±0.5%
Accuracy
Temp drift Over full range ±1.0%
Voltage
Bus voltage measurement Error ±0.2% ±0.5%
Accuracy
Temp drift ( -25°C to 85°C ) Over full range ±1.0%
12 Bit 532 586
11 Bit 276 304
T
CONV
Conversion time
10 Bit 148 163 ms
9 Bit 84 92
T
LOWCONV
Conversion time Minimum A/D conversion time 4
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