參數(shù)資料
型號: INA333AIDGKRG4
廠商: Texas Instruments
文件頁數(shù): 6/27頁
文件大?。?/td> 0K
描述: IC INST AMP PREC LOW PWR 8-MSOP
視頻文件: INA333 Zero-Drift Instrumentation Amp
標(biāo)準(zhǔn)包裝: 2,500
放大器類型: 儀表
電路數(shù): 1
輸出類型: 滿擺幅
轉(zhuǎn)換速率: 0.16 V/µs
-3db帶寬: 150kHz
電流 - 輸入偏壓: 70pA
電壓 - 輸入偏移: 10µV
電流 - 電源: 50µA
電流 - 輸出 / 通道: 40mA
電壓 - 電源,單路/雙路(±): 1.8 V ~ 5.5 V,±0.9 V ~ 2.75 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 8-TSSOP,8-MSOP(0.118",3.00mm 寬)
供應(yīng)商設(shè)備封裝: 8-MSOP
包裝: 帶卷 (TR)
GENERAL LAYOUT GUIDELINES
300W
+3V
150W
R
(1)
1
2V
V
- D
2V+ V
D
3V
R
G
INA333
V
O
Ref
1.5V
INPUT PROTECTION
APPLICATION IDEAS
INA333
R /2
G
V
O
LA
RL
RA
10kW
Ref
G=10
2.8kW
1/2
OPA2333
390kW
1/2
OPA2333
SBOS445B – JULY 2008 – REVISED OCTOBER 2008 ..................................................................................................................................................... www.ti.com
Attention
to
good
layout
practices
is
always
recommended.
Keep
traces
short
and,
when
possible, use a printed circuit board (PCB) ground
plane with surface-mount components placed as
close to the device pins as possible. Place a 0.1
F
bypass capacitor closely across the supply pins.
These guidelines should be applied throughout the
analog circuit to improve performance and provide
benefits
such
as
reducing
the
electromagnetic-interference (EMI) susceptibility.
(1) R1 creates proper common-mode voltage, only for low-voltage
Instrumentation amplifiers vary in the susceptibility to
operation—see the Single-Supply Operation section.
radio-frequency interference (RFI). RFI can generally
be identified as a variation in offset voltage or dc
Figure 35. Single-Supply Bridge Amplifier
signal levels with changes in the interfering RF signal.
The INA333 has been specifically designed to
minimize
susceptibility
to
RFI
by
incorporating
passive RC filters with an 8MHz corner frequency at
The input terminals of the INA333 are protected with
the VIN+ and VIN– inputs. As a result, the INA333
internal diodes connected to the power-supply rails.
demonstrates remarkably low sensitivity compared to
These diodes clamp the applied signal to prevent it
previous generation devices. Strong RF fields may
from damaging the input circuitry. If the input signal
continue to cause varying offset levels, however, and
voltage can exceed the power supplies by more than
may require additional shielding.
0.3V, the input signal current should be limited to less
than 10mA to protect the internal clamp diodes. This
current limiting can generally be done with a series
input resistor. Some signal sources are inherently
Additional application ideas are shown in Figure 36 to
current-limited and do not require limiting resistors.
Figure 36. ECG Amplifier With Right-Leg Drive
14
Copyright 2008, Texas Instruments Incorporated
Product Folder Link(s): INA333
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