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参数资料
| 型号： | PGA204BU |
| 元件分类： | 测量放大器 |
| 英文描述： | Precision Gain of 5 Instrumentation Amplifier |
| 中文描述： | 5精密增益仪表放大器 |
| 文件页数： | 10/14页 |
| 文件大小： | 261K |
| 代理商： | PGA204BU |
10
PGA204/205
TYPICAL PERFORMANCE CURVES
(CONT)
At T
A
= +25
°
C, and V
S
=
±
15V, unless otherwise noted.
NOISE, 0.1 TO 10Hz, G = 1
1s/Div
0.5
μ
V/Div
0.2
μ
V/Div
1s/Div
INPUT-REFERRED NOISE,
0.1 TO 10Hz, G = 1000
FIGURE 1. Basic Connections.
APPLICATION INFORMATION
Figure 1
shows the basic connections required for operation
of the PGA204/205. Applications with noisy or high imped-
ance power supplies may require decoupling capacitors
close to the device pins as shown.
The output is referred to the output reference (Ref) terminal
which is normally grounded. This must be a low-impedance
connection to assure good common-mode rejection. A resis-
tance of 5
in series with the Ref pin will cause a typical
device to degrade to approximately 80dB CMR (G=1).
The PGA204/205 has an output feedback connection (pin
12). Pin 12 must be connected to the output terminal (pin 11)
for proper operation. The output Feedback connection can
be used to sense the output voltage directly at the load for
best accuracy.
DIGITAL INPUTS
The digital inputs A
0
and A
1
select the gain according to the
logic table in Figure 1. Logic “1” is defined as a voltage
greater than 2V above digital ground potential (pin 14).
Digital ground can be connected to any potential from the
V– power supply to 4V less than V+. Digital ground is
normally connected to ground. The digital inputs interface
directly CMOS and TTL logic components.
Approximately 1
μ
A flows out of the digital input pins when
a logic “0” is applied. Logic input current is nearly zero with
a logic “1” input. A constant current of approximately
A
1
A
2
A
3
12
11
10
25k
25k
25k
25k
7
5
14
16
4
V
IN
V
IN
PGA204
PGA205
V
O
= G (V
IN
– V
IN
)
V
O
–
+
Over-Voltage
Protection
Over-Voltage
Protection
Feedback
Digitally Selected
Feedback Network
1
V
O1
15
6
9
8
V
O2
V
OS
Adj
+15V
1μF
+15V
1μF
+
–
PGA204
V
IN
V
IN
–
+
V
O
A
1
A
0
Sometimes shown in simplified form:
A
1
A
0
0
0
1
1
PGA205
1
2
4
8
PGA204
1
10
100
1000
GAIN
0
1
0
1
Ref
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PGA204BU | 制造商:Texas Instruments 功能描述:IC SM AMP INSTRUMENT PROG GAIN |
| PGA204BU | 制造商:Texas Instruments 功能描述:AMP INSTRUMENT PROG GAIN SOIC16 |
| PGA204BU/1K | 功能描述:仪表放大器 Prgrmmbl Gain Instrum Amp RoHS:否 制造商:Texas Instruments 通道数量: 输入补偿电压:150 V 可用增益调整: 最大输入电阻:10 kOhms 共模抑制比（最小值）:88 dB 工作电源电压:2.7 V to 36 V 电源电流:200 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:MSOP-8 封装:Bulk |
| PGA204BU/1KE4 | 功能描述:仪表放大器 Prgrmmbl Gain Instrum Amp RoHS:否 制造商:Texas Instruments 通道数量: 输入补偿电压:150 V 可用增益调整: 最大输入电阻:10 kOhms 共模抑制比（最小值）:88 dB 工作电源电压:2.7 V to 36 V 电源电流:200 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:MSOP-8 封装:Bulk |
| PGA204BUE4 | 功能描述:仪表放大器 Programmable Gain Instrum Amp RoHS:否 制造商:Texas Instruments 通道数量: 输入补偿电压:150 V 可用增益调整: 最大输入电阻:10 kOhms 共模抑制比（最小值）:88 dB 工作电源电压:2.7 V to 36 V 电源电流:200 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:MSOP-8 封装:Bulk |
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