OPA365-EP Datasheet, PDF (8/19 Pages) Texas Instruments – 50-MHz Low-Distortion High-CMRR Rail-to-Rail I/O, Single-Supply Operational Amplifier

OPA365-EP
SLOS735 – AUGUST 2011
APPLICATION INFORMATION
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Operating Characteristics
The OPA365 amplifier parameters are fully specified from 2.2 V to 5.5 V. Many of the specifications apply from
−55°C to 125°C. Parameters that can exhibit significant variance with regard to operating voltage or temperature
are presented in Typical Characteristics.
General Layout Guidelines
The OPA365 is a wideband amplifier. To realize the full operational performance of the device, good
high-frequency printed circuit board (PCB) layout practices are required. Low-loss 0.1-µF bypass capacitors must
be connected between each supply pin and ground as close to the device as possible. The bypass capacitor
traces should be designed for minimum inductance.
Basic Amplifier Configurations
As with other single-supply op amps, the OPA365 may be operated with either a single supply or dual supplies
(see Figure 2). A typical dual-supply connection is shown in Figure 2, which is accompanied by a single-supply
connection. The OPA365 is configured as a basic inverting amplifier with a gain of −10 V/V. The dual-supply
connection has an output voltage centered on zero, while the single−supply connection has an output centered
on the common-mode voltage V_CM. For the circuit shown, this voltage is 1.5 V, but may be any value within the
common-mode input voltage range. The OPA365 V_CM range extends 100 mV beyond the power-supply rails.
R₂
10kΩ
R₂
10kΩ
R₁
1kΩ
V_IN
+1.5 V
C₁
100nF
V+
OPA365
V−
C₂
100nF
−1.5V
V_OUT
R₁
1kΩ
V_IN
V_CM =1.5V
+3V
C₁
100nF
V+
OPA365
V−
V_OUT
a) Dual Supply Connection
b) Single Supply Connection
Figure 2. Basic Circuit Connections
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