參數(shù)資料
型號： PGA309AIPWT
廠商： TEXAS INSTRUMENTS INC
元件分類： 模擬信號調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PDSO16
封裝： GREEN, PLASTIC, TSSOP-16
文件頁數(shù)： 20/24頁
文件大?。?/td> 661K
代理商： PGA309AIPWT
www.ti.com
SBOS292C – DECEMBER 2003 – REVISED JANUARY 2011
ELECTRICAL CHARACTERISTICS (continued)
Boldface limits apply over the specified temperature range, TA = –40°C to +125°C.
At TA = +25°C, VSA= VSD = +5V (VSA = VSUPPLY ANALOG, VSD = VSUPPLY DIGITAL; VSA must equal VSD), GNDD = GNDA = 0, and VREF
= REFIN/REFOUT = +5V, unless otherwise noted.
PGA309
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
Fault Monitor Circuit
INP_HI, INN_HI Comparator Threshold
See
(6)
VSA 1.2 or VEXC 0.1
V
INP_LO, INN_LO Comparator Threshold
40
100
mV
A1SAT_HI, A2SAT_HI Comparator Threshold
VSA 0.12
V
A1SAT_LO, A2SAT_LO Comparator Threshold
VSA 0.12
V
A3_VCM Comparator Threshold
VSA 1.2
V
Comparator Hysteresis
20
mV
Internal Voltage Reference
VREF1
Register 3, bit D9 = 1
2.46
2.5
2.53
V
VREF1 Drift vs Temperature
+10
ppm/°C
VREF2
IPU
Register 3, bit D9 = 0
4.0
4.096
4.14
V
VREF2 Drift vs Temperature
+10
±7
ppm/°C
Input Current REFIN/REFOUT
Internal VREF disabled
100
mA
Output Current REFIN/REFOUT
VSA > 2.7V for VREF = 2.5V
1
mA
VSA > 4.3V for VREF = 4.096V
1
mA
Temperature Sense Circuitry (ADC)
Internal Temperature Measurement
Register 6, bit D9 = 1
xx Accuracy
±2
°C
xx Resolution
12-Bit + sign, twos complement data format
±0.0625
°C
xx Temperature Measurement Range
55
+150
°C
xx Conversion Rate
R1, R0 = ‘11’, 12-bit + sign resolution
24
ms
Temperature ADC
External Temperature Mode
Temp PGA + Temp ADC
1 to 8
V/V
xx Gain Range Steps
GPGA = 1, 2, 4, 8
GND
0.2
VSA +0.2
V
xx Analog Input Voltage Range
Temperature ADC Internal REF (2.048V)
Register 6, bit D8 = 1
xx Full-Scale Input Voltage
(+Input)
(Input)
±2.048/GPGA
V
xx Differential Input Impedance
2.8/GPGA
M
Ω
xx Common-Mode Input Impedance
GPGA = 1
3.5
M
Ω
GPGA = 2
3.5
M
Ω
GPGA = 4
1.8
M
Ω
GPGA = 8
0.9
M
Ω
xx Resolution
R1, R0 = ‘00’, ADC2X = ‘0’, conversion time = 8ms
11
Bits + Sign
R1, R0 = ‘01’, ADC2X = ‘0’, conversion time = 32ms
13
Bits + Sign
R1, R0 = ‘10’, ADC2X = ‘0’, conversion time = 64ms
14
Bits + Sign
R1, R0 = ‘11’, ADC2X = ‘0’, conversion time = 128ms
15
Bits + Sign
xx Integral Nonlinearity
0.004
%
xx Offset Error
GPGA = 1
1.2
mV
GPGA = 2
0.7
mV
GPGA = 4
0.5
mV
GPGA = 8
0.4
mV
xx Offset Drift
GPGA = 1
1.2
mV/°C
GPGA = 2
0.6
mV/°C
GPGA = 4
0.3
mV/°C
GPGA = 8
0.3
mV/°C
(6)
When VEXC is enabled, a minimum reference selector circuit becomes the reference for the comparator threshold. This minimum
reference selector circuit uses VEXC 100mV and VSA 1.2V and compares the VINX pin to the lower of the two references. This
configuration ensures accurate fault monitoring in conditions where VEXC might be higher or lower than the input CMR of the PGA input
amplifier relative to VSA.
Copyright 2003–2011, Texas Instruments Incorporated
5
Product Folder Link(s): PGA309
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