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参数资料
| 型号： | PGA117AIPW |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO20 |
| 封装： | GREEN, PLASTIC, TSSOP-20 |
| 文件页数： | 30/47页 |
| 文件大小： | 1545K |
| 代理商： | PGA117AIPW |
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APPLICATIONS: GENERAL-PURPOSE INPUT
V
OUT
CH1
DV
DD
AV
DD
V
REF
V /2
S
(+2.5V)
V
S
(+5V)
CH0
V
IN0
200mV
PP
MUX
R
A
V
REF_ADC
R
B
R
X
PGA112
PGA113
G=1
0
+100mV
-100mV
+2.5V
+2.6V
+2.4V
+2.5V
+4.5V
+0.5V
V
OUT0
V
IN0
V
CH0
C
A
V
IN1
R
A
R
F
R
I
G=20
+
-
+4.9625V
+37.5mV
V
OUT1
SBOS424B – MARCH 2008 – REVISED SEPTEMBER 2008 ............................................................................................................................................ www.ti.com
Table 12 summarizes the scaling resistor values for
SCALING
RA, RX, and RB for different ADC Ref voltages.
VREF_ADC is the reference voltage used for the ADC
is
an
example
application
that
connected to the PGA112/PGA113 output. It is
demonstrates
the
flexibility
of
the
PGA
for
assumed the ADC input range is 0V to VREF_ADC. The
general-purpose input scaling. VIN0 is a ±100mV input
Bipolar Input to Single-Supply Scaling section gives
that is ac-coupled into CH0. The PGA112/PGA113 is
the
algorithm
to
compute
resistor
values
for
powered from a +5V supply voltage, VS, and
references not listed in Table 12. As a general
configured with the VREF pin connected to VS/2
guideline, RB should be chosen such that the input
(+2.5V). VCH0 is the ±100mV input, level-shifted and
on-channel current multiplied by RB is less than or
centered on VS/2 (+2.5V). A gain of 20 is applied to
equal to the input offset voltage. This value ensures
CH0, and because of the PGA113 configuration, the
that the scaling network contributes no more error
output voltage at VOUT is ±2V centered on VS/2
than the input offset voltage. Individual applications
(+2.5V).
may require other design trade-offs.
CH1 is set to G = 1; through a resistive divider and
scalar network, we can read ±5V or 0V. This setting
provides
bipolar
to
single-ended
input
scaling.
Figure 77. General-Purpose Input Scaling
36
Copyright 2008, Texas Instruments Incorporated
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|---|---|
| PGA117AIPWG4 | 功能描述:特殊用途放大器 Programmable Gain Amp w/Mux RoHS:否 制造商:Texas Instruments 通道数量:Single 共模抑制比（最小值）: 输入补偿电压: 工作电源电压:3 V to 5.5 V 电源电流:5 mA 最大功率耗散: 最大工作温度:+ 70 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-20 封装:Reel |
| PGA117AIPWR | 功能描述:特殊用途放大器 Zero-Drift Program Gain AMP/MUX RoHS:否 制造商:Texas Instruments 通道数量:Single 共模抑制比（最小值）: 输入补偿电压: 工作电源电压:3 V to 5.5 V 电源电流:5 mA 最大功率耗散: 最大工作温度:+ 70 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-20 封装:Reel |
| PGA117AIPWRG4 | 功能描述:特殊用途放大器 Programmable Gain Amp w/Mux RoHS:否 制造商:Texas Instruments 通道数量:Single 共模抑制比（最小值）: 输入补偿电压: 工作电源电压:3 V to 5.5 V 电源电流:5 mA 最大功率耗散: 最大工作温度:+ 70 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-20 封装:Reel |
| PGA-120-AH3-S-TG | 制造商:3M Electronic Products Division 功能描述: |
| PGA120M004B1-1315BLU | 制造商:FCI 功能描述: |
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