- 您现在的位置：买卖IC网 > PDF目录367929 > PGA206U Micropower single-supply CMOS Instrumentation Amplifier PDF资料下载
参数资料
| 型号： | PGA206U |
| 元件分类： | 测量放大器 |
| 英文描述： | Micropower single-supply CMOS Instrumentation Amplifier |
| 中文描述： | 微功耗单电源 CMOS 仪表放大器 |
| 文件页数： | 7/10页 |
| 文件大小： | 246K |
| 代理商： | PGA206U |
7
PGA206/207
FIGURE 1. Basic Connections.
APPLICATIONS INFORMATION
Figure 1 shows the circuit diagram for basic operation of the
PGA206 or PGA207. Applications with noisy or high im-
pedance 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 2
in series with the Ref pin will cause a typical
device to degrade to approximately 80dB CMR (G = 1).
The output sense connection (pin 12) must be connected to
the output terminal (pin 11) for proper operation. This
connection can be made 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 ranging
from the V– power supply to 4V less than V+. Digital
ground is usually equal to analog ground potential and the
two grounds are connected at the power supply. The digital
inputs interface directly to CMOS and TTL logic.
A nearly constant current of approximately 1.2mA flows in
the digital ground pin. It is good practice to return digital
ground through a separate connection path so that analog
ground is not affected by the digital ground current.
A
1
A
2
A
3
12
11
10
10k
10k
10k
10k
7
5
14
16
4
V
IN
V
IN
PGA206
PGA207
V
O
= G (V
IN
– V
IN
)
V
O
–
+
Over-Voltage
Protection
Over-Voltage
Protection
Sense
Digitally Selected
Feedback Network
1
13
V
O1
15
6
9
8
V
O2
V
OS
Adj
+15V
1μF
–15V
1μF
+
–
PGA206
V
IN
V
IN
–
+
V
O
A
1
A
0
Sometimes shown in simplified form:
A
1
A
0
0
0
1
1
PGA207
1
2
5
10
PGA206
1
2
4
8
GAIN
0
1
0
1
Ref
Digital
Ground
The digital inputs, A
0
and A
1
, are not latched. A change in
logic input immediately selects a new gain. Switching time
of the logic is approximately 500ns. The time to respond to
gain change is equal to switching time, plus the time it takes
the amplifier to settle to a new output voltage in the newly
selected gain (see settling time specifications).
Many applications use an external logic latch to acquire gain
control data from a high speed digital bus. Using an external
latch isolates the high speed digital bus from sensitive
analog circuitry. Locate the digital latch as far as practical
from analog circuitry to avoid coupling digital noise into
analog input circuitry.
OFFSET VOLTAGE ADJUSTMENT
The PGA206 and PGA207 are laser trimmed for very low
offset voltage and drift. Many applications require no exter-
nal offset adjustment. Multiplexed data acquisition systems
generally correct offset by grounding the inputs of one
channel to measure offset voltage. Stored offset values for
each gain are then subtracted from subsequent readings of
other channels.
Figure 2 shows optional offset voltage trim circuits. Offset
voltage changes with the selected gain. To adjust for low
offset voltage in all gains, both input and output offsets must
be trimmed.
相关PDF资料 |
PDF描述 |
|---|---|
| PGA207 | Micropower single-supply CMOS Instrumentation Amplifier |
| PGA207P | Micropower single-supply CMOS Instrumentation Amplifier |
| PGA207PA | Micropower single-supply CMOS Instrumentation Amplifier |
| PGA207U | Micropower single-supply CMOS Instrumentation Amplifier |
| PGA2310PAG4 | Stereo Audio Volume Control |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PGA206UA | 功能描述:仪表放大器 High-Speed Prog Gain 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 |
| PGA206UA | 制造商:Texas Instruments 功能描述:IC SM AMP INSTRUMENT PROG GAIN |
| PGA206UA | 制造商:Texas Instruments 功能描述:AMP INSTRUMENT PROG GAIN SOIC16 |
| PGA206UAG4 | 功能描述:仪表放大器 High-Speed Prog Gain 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 |
| PGA207 | 制造商:BB 制造商全称:BB 功能描述:High-Speed Programmable Gain INSTRUMENTATION AMPLIFIER |
发布紧急采购，3分钟左右您将得到回复。