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型号： PGA308AIDGSTG4
厂商： TEXAS INSTRUMENTS INC
元件分类： 模拟信号调理
英文描述： SPECIALTY ANALOG CIRCUIT, PDSO10
封装： GREEN, PLASTIC, MSOP-10
文件页数： 25/29页
文件大小： 962K
代理商： PGA308AIDGSTG4
PGA308
www.ti.com
SBOS440B – JULY 2008 – REVISED DECEMBER 2010
ELECTRICAL CHARACTERISTICS (continued)
Boldface limits apply over the specified temperature range, TA = –40°C to +125°C.
At TA = +25°C, VS = +5V, GND = 0V, DOUT/VCLAMP = +5V, and VREF = +5V, unless otherwise noted.
PGA308
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
Over- and Under-Scale Limits
Over-Scale Thresholds
VLIM = 4V, register-selectable ratio of VLIM
OS0
HL[2:0] (CFG1 register D[5:3]) = 000
0.97
0.9805
0.99
V/V
OS1
HL[2:0] (CFG1 register D[5:3]) = 001
0.9588
0.9688
0.9788
V/V
OS2
HL[2:0] (CFG1 register D[5:3]) = 010
0.9509
0.9609
0.9709
V/V
OS3
HL[2:0] (CFG1 register D[5:3]) = 011
0.9392
0.9492
V/V
OS4
HL[2:0] (CFG1 register D[5:3]) = 100
0.8416
0.8516
0.8616
V/V
OS5
HL[2:0] (CFG1 register D[5:3]) = 101
0.7673
0.7773
0.7873
V/V
OS6
HL[2:0] (CFG1 register D[5:3]) = 110
0.6189
0.6289
0.6389
V/V
OS7
HL[2:0] (CFG1 register D[5:3]) = 111
0.5603
0.5703
0.5803
V/V
Over-Scale Threshold Tempco
±3
ppm/°C
Over-Scale Amplifier Offset
±9
mV
Over-Scale Amplifier Offset Drift
±10
mV/°C
Under-Scale Thresholds
VLIM = 5V, register-selectable ratio of VLIM
US7
LL[2:0] (CFG1 register D[2:0]) = 111
0.0487
0.0547
0.0607
V/V
US6
LL[2:0] (CFG1 register D[2:0]) = 110
0.04478
0.05078
0.05678
V/V
US5
LL[2:0] (CFG1 register D[2:0]) = 101
0.04088
0.04688
0.05288
V/V
US4
LL[2:0] (CFG1 register D[2:0]) = 100
0.03306
0.03906
0.04506
V/V
US3
LL[2:0] (CFG1 register D[2:0]) = 011
0.02916
0.03516
0.04116
V/V
US2
LL[2:0] (CFG1 register D[2:0]) = 010
0.02525
0.03125
0.03725
V/V
US1
LL[2:0] (CFG1 register D[2:0]) = 001
0.01743
0.02343
0.02943
V/V
US0
LL[2:0] (CFG1 register D[2:0]) = 000
0.01353
0.01953
0.02553
V/V
Under-Scale Threshold Tempco
±3
ppm/°C
Under-Scale Amplifier Offset
±9
mV
Under-Scale Amplifier Offset Drift
±10
mV/°C
Output Voltage Clamp
Input Voltage Range
VCLAMP ≤ VS, VS = +5V
1.25
4.95
V
Input Bias Current
±60
nA
VOUT Clamp Point
VCLAMP – 0.05
VCLAMP
VCLAMP + 0.05
V
Fault Monitor Circuit
(External Comparators)
INP_HI Comparator Threshold
Fault Detect Mode Select = 0 (bridge fault); see CFG1
Smaller of (VS – 1.2) or (0.65VFLT)
V
INN_HI Comparator Threshold
register
INP_LO Comparator Threshold
Fault Detect Mode Select = 0 (bridge fault); see CFG1
Larger of (0.1V) or (0.35VFLT)
V
INN_LO Comparator Threshold
register
Fault Monitor Reference
VFLT
Fault Monitor Reference; see CFG1 register, FLT REF bit
VS or VREF
V
sets VFLT
INP_HI Comparator Threshold
Fault Detect Mode Select = 1 (common-mode fault); see
VS – 1.2
V
INN_HI Comparator Threshold
CFG1 register
INP_LO Comparator Threshold
Fault Detect Mode Select = 1 (common-mode fault); see
70
100
130
mV
INN_LO Comparator Threshold
CFG1 register
Comparator Hysteresis
7
mV
Comparator Input Offset Voltage
±10
mV
Fault Monitor Circuit
(Internal Comparators)
A1SAT_LO Comparator Threshold
Threshold is amplifier negative saturation voltage
100
mV
A2SAT_LO Comparator Threshold
A1SAT_HI Comparator Threshold
Threshold is amplifier positive saturation voltage
VS – 0.12
V
A2SAT_HI Comparator Threshold
A3SAT_LO Comparator Threshold
Threshold is amplifier negative saturation voltage
50
mV
VIN1, VIN2 Pull-up Current Sources
Pull-Up Current Source
IPU
Register-selectable
15
30
45
nA
Current Source Matching
±1.5
±7
nA
Current Source Tempco
±5
pA/°C
Copyright 2008–2010, Texas Instruments Incorporated
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