OPA2333-HT Datasheet, PDF (13/23 Pages) Texas Instruments – 1.8-V MICROPOWER CMOS OPERATIONAL AMPLIFIER ZERO-DRIFT SERIES

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OPA2333-HT
SBOS483F – JULY 2009 – REVISED AUGUST 2012
+5V
+
0.1mF
R E F 3140
D1
−−
4.096V
R₁
6.04kΩ
R₅
31.6kΩ
R₂
2.94kΩ
R₂
549Ω
R₉
150kΩ
+5V
0. 1mF
++
K −T ype
R₆
200Ω
O PA2333
V_O
T hermocouple
R₄
R₃
Zero Adj.
40.7mV/°C
6.04kΩ 60.4Ω
A. REF3140 has not been characterized or tested at 210°C.
Figure 4. Temperature Measurement
Figure 5 shows the basic configuration for a bridge amplifier.
V_EX
RR
RR
R₁
+5V
OPA2333
V_OUT
R₁
V_REF
Figure 5. Single Op-Amp Bridge Amplifier
A low-side current shunt monitor is shown in Figure 6. R_N are operational resistors used to isolate the ADS1100
from the noise of the digital I²C bus. Since the ADS1100 is a 16-bit converter, a precise reference is essential for
maximum accuracy. If absolute accuracy is not required, and the 5-V power supply is sufficiently stable, the
REF3130 may be omitted.
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