Datasheet

OFFSET VOLTAGE vs COMMON MODE VOLTAGE
V
OS
(
µ
V)
200
150
100
50
0
−
50
−
150
−
100
−
200
−
2
−
3
Common Mode Voltage (V)
3
−
1 0 1 2
V =
S
±
2.75V
OPA365
Competitors
Regulated
Charge Pump
V
OU T
= V
C C
+1.8V
Patent Pending
Very Low Ripple
Topology
I
B IA S
V
C C
+ 1. 8 V
I
BI A S
I
BI A S
I
B IA S
V
S
I
B IA S
V
OU T
V
IN
− V
I N
+
OPA365-EP
SLOS735 –AUGUST 2011 www.ti.com
Rail-to-Rail Input
The OPA365 features true rail-to-rail input operation, with supply voltages as low as ±1.1 V (2.2 V). A unique
zero-crossover input topology eliminates the input offset transition region typical of many rail-to-rail,
complementary stage operational amplifiers. This topology also allows the OPA365 to provide superior
common-mode performance over the entire input range, which extends 100 mV beyond both power-supply rails,
as shown in Figure 5. When driving ADCs, the highly linear VCM range of the OPA365 assures that the op
amp/ADC system linearity performance is not compromised.
Figure 5. OPA365 has Linear Offset Over the Entire Common-Mode Range
A simplified schematic illustrating the rail-to-rail input circuitry is shown in Figure 6.
Figure 6. Simplified Schematic
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Product Folder Link(s): OPA365-EP