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参数资料
| 型号： | PGA112AIDGSRG4 |
| 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： | 24/47页 |
| 文件大小： | 1545K |
| 代理商： | PGA112AIDGSRG4 |
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R
I
R
F
G=1
PGA112
PGA113
V
REF
V /2
S
V
IN0
V
IN1
V
OUT
CH0
CH1
MUX
+
-
V
OUT0 =G
V
AV /2
(G
1)
-
-
IN0
DD
(2)
InputVoltage(V)
InputOffsetV
oltage(
V)
m
50
40
30
20
10
0
10
20
30
-
1
0
6
2
3
4
5
AV
=5V
DD
OP AMP: GENERAL GAIN EQUATIONS
V
=G
(V
+AV /2)
/2
(G
1)
V
=G
V
+
/2,where:
/2<G
V
<+
/2
-
OUT1
IN1
DD
-
-
AV
DD
OUT1
IN1
DD
IN1
DD
R
I
R
F
G=1
V
REF
V
IN
V
OUT
CH1
V
=G
V
OUT
IN
(1)
SBOS424B – MARCH 2008 – REVISED SEPTEMBER 2008 ............................................................................................................................................ www.ti.com
Figure 72. PGA112/PGA113 Configuration for
Positive and Negative Excursions Around
Midsupply Virtual Ground
When: G = 1
Figure 70. VOS versus Input Voltage—Case 2
Then: VOUT0 = G × VIN0
Figure 71 shows the basic configuration for using the
PGA as a gain block. VOUT/VIN is the selected
(3)
noninverting gain, depending on the model selected,
Where:
for either binary or scope gains.
G = 1, 2, 4, 8, 16, 32, 64, and 128 (binary gains)
G = 1, 2, 5, 10, 20, 50, 100, and 200 (scope
gains)
Table 7 details the internal typical values for the op
amp internal feedback resistor (RF) and op amp
internal input resistor (RI) for both binary and scope
gains.
Table 7. Typical RF and RI versus Gain
Binary
Scope
Gain
Figure 71. PGA Used as a Gain Block
(V/V)
RF ()
RI ()
(V/V)
RF ()
RI ()
1
0
3.25k
1
0
3.25k
2
3.25k
2
3.25k
Where:
4
9.75k
3.25k
5
13k
3.25k
G = 1, 2, 4, 8, 16, 32, 64, and 128 (binary gains)
8
22.75k
3.25k
10
29.25k
3.25k
G = 1, 2, 5, 10, 20, 50, 100, and 200 (scope
16
48.75k
3.25k
20
61.75k
3.25k
gains)
32
100.75k
3.25k
50
159.25k
3.25k
Figure 72 shows the PGA configuration and gain
64
204.75k
3.25k
100
321.75k
3.25k
equations for VREF = AVDD/2. VOUT0 is VOUT when
128
412.75k
3.25k
200
646.75k
3.25k
CH0 is selected and VOUT1 is VOUT when CH1 is
selected. Notice the VREF pin has no effect for G = 1
because the internal feedback resistor, RF, is shorted
out.
This
configuration
allows
for
positive
and
negative voltage excursions around a midsupply
virtual ground.
30
Copyright 2008, Texas Instruments Incorporated
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相关代理商/技术参数 |
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|---|---|
| PGA112AIDGST | 功能描述:特殊用途放大器 Sgl-Sply Sgl-Ended Prec Prgrm Gain Amp 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 |
| PGA112AIDGSTG4 | 功能描述:特殊用途放大器 0-Drift Programmable Gain Amp 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 |
| PGA112EVM | 功能描述:放大器 IC 开发工具 PGA112 Eval Mod RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| PGA112EVM-B | 功能描述:放大器 IC 开发工具 PGA112 Eval Mod Rev B RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| PGA113 | 制造商:TI 制造商全称:Texas Instruments 功能描述:Single-Supply, Single-Ended, Precision Programmable Gain Amplifier with MUX |
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