參數(shù)資料
型號(hào)： PGA309AIPWT
廠商： TEXAS INSTRUMENTS INC
元件分類： 模擬信號(hào)調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PDSO16
封裝： GREEN, PLASTIC, TSSOP-16
文件頁(yè)數(shù)： 22/24頁(yè)
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
Linearization Adjust and Excitation Voltage (VEXC)
Range 0
Register 3, bit D11 = 0
xx Linearization DAC Range
With respect to VFB
0.166 to +0.166
V/V
xx Linearization DAC Resolution
±127 steps, 7-bit + sign
1.307
mV/V
xx VEXC Gain
With respect to VREF
0.83
V/V
xx Gain Error Drift
25
ppm/°C
Range 1
Register 3, bit D11 = 1
xx Linearization DAC Range
With respect to VFB
0.124 to +0.124
V/V
xx Linearization DAC Resolution
±127 steps, 7-bit + sign
0.9764
mV/V
xx VEXC Gain
With respect to VREF
0.52
V/V
xx Gain Error Drift
25
ppm/°C
VEXC Range Upper Limit
IEXC = 5mA
VSA 0.5
V
IEXC SHORT
Short-circuit VEXC output current
50
mA
Digital Interface
Two-Wire Compatible
Bus speed
1
400
kHz
One-Wire
Serial speed baud rate
4.8K
38.4K
Bits/s
Maximum Lookup Table Size
(7)
17 x 3 x 16
Bits
Two-Wire Data Rate
PGA309 to EEPROM (SCL frequency)
65
kHz
Logic Levels
Input Levels (SDA, SCL, PRG, TEST)
Low
0.2 VSD
V
Input Levels (SDA, SCL, PRG, TEST)
High
0.7 VSD
V
Input Levels (SDA, SCL)
Hysteresis
0.1 VSD
V
Pull-Up Current Source (SDA, SCL)
55
85
125
mA
Pull-Down Current Source (TEST)
15
25
40
mA
Output LOW Level (SDA, SCL, PRG)
Open drain, ISINK = 5mA
0.4
V
Power Supply
VSA, VSD
2.7
5.5
V
ISA + ISD, Quiescent Current
VSA = VSD = +5V, without bridge load
1.2
1.6
mA
Power-On Reset (POR)
Power-Up Threshold
VS rising
2.2
2.7
V
Power-Down Threshold
VS falling
1.7
V
Temperature Range
Specified Performance Range
–40
+125
°C
Operational-Degraded Performance Range
–55
+150
°C
(7)
Lookup table allows multislope compensation over temperature. Lookup table has access to 17 calibration points consisting of three
adjustment values (Tx, Temperature, ZMx, Zero DAC, GMx, Gain DAC) that are stored in 16-bit data format (17x3x16 = Lookup table
size).
Copyright 2003–2011, Texas Instruments Incorporated
7
Product Folder Link(s): PGA309
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