Information

4 | Signal Chain Guide 2013 Texas Instruments
Amplifiers and Comparators
Operational Amplifiers
Get more information: www.ti.com/product/OPA320
Precision, 20 MHz, 0.9 pA, Low-Noise, RRIO, CMOS Operational Amplifiers with Shutdown
OPA320
The OPA320 series is ideal for low-power, single-supply applications. The OPA320
features a linear input stage with zero-crossover distortion that delivers excellent
common-mode rejection ratio (CMRR) of typically 114 dB, low-noise (7 nV/
√
—
Hz and
total harmonic distortion plus noise of 0.0005% typical). High-speed operation also
makes them well-suited for driving sampling analog-to-digital converters (ADCs). Other
applications include signal conditioning and sensor amplification.
Two Op Amp Instrumentation Amplifier with Improved
High-Frequency Common-Mode Rejection
Key Features
• Precisionwithzero-crossoverdistortion:
Low offset voltage: 150 μV (max)
High CMRR: 114 dB
Rail-to-rail I/O
•Lowinputbiascurrent:0.9pA(max)
•Lownoise:7nV/
√
—
Hz at 10 kHz
•Widebandwidth:20MHz
•Slewrate:10V/μsand
•Quiescentcurrent:1.45mA/ch
•Single-supplyvoltagerange:
1.8 V to 5.5 V
•
Unity-gainstable
•Smallpackages:SOT23,MSOP,DFN
Applications
•High-Zsensorsignalconditioning
•Transimpedanceamplifiers
•Testandmeasurementequipment
•Programmablelogiccontrollers(PLCs)
•Motorcontrolloops
•Communications
•Input/outputADC/DACbuffers
•Activefilters
1/2
OPA2320
1/2
OPA2320
R
3
25k
R
2
25k
R
G
R
1
100k
R
4
100k
R
L
10k
V
OUT
50k
200k
R
G
+5V
+5V
REF1004-2.5
4
8
(2.5V)
+5V