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OPA2348AIDCNRG4 Datasheet(PDF) 8 Page - Texas Instruments

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Part # OPA2348AIDCNRG4
Description  1MHz, 45uA, CMOS, Rail-to-Rail OPERATIONAL AMPLIFIERS Value Line
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

OPA2348AIDCNRG4 Datasheet(HTML) 8 Page - Texas Instruments

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-0.5
Common-Mode Voltage (V)
OFFSET VOLTAGE
vs FULL COMMON-MODE VOLTAGE RANGE
0
V-
0.5
1.5
1
2.5
2
3.5
3
4.5
5
4
5.5
2
1.5
1
0.5
0
-0.5
-1
-1.5
-2
V+
5V
0V
G = +1V/V, V = +5V
S
20 s/div
m
Output (Inverted on Scope)
OPA348
OPA2348
OPA4348
SBOS213G – NOVEMBER 2001 – REVISED MARCH 2013
www.ti.com
APPLICATION INFORMATION
COMMON-MODE VOLTAGE RANGE
The OPA348 series op amps are unity-gain stable
and suitable for a wide range of general-purpose
The input common-mode voltage range of the
applications.
OPA348 series extends 200mV beyond the supply
rails. This is achieved with a complementary input
The OPA348 series features wide bandwidth and
stage—an N-channel input differential pair in parallel
unity-gain stability with rail-to-rail input and output for
with a P-channel differential pair. The N-channel pair
increased dynamic range. Figure 19 shows the input
is active for input voltages close to the positive rail,
and output waveforms for the OPA348 in unity-gain
typically (V+) – 1.2V to 300mV above the positive
configuration. Operation is from a single +5V supply
supply, while the P-channel pair is on for inputs from
with a 100k
Ω load connected to VS/2. The input is a
300mV below the negative supply to approximately
5VPP sinusoid. Output voltage is approximately
(V+) – 1.4V. There is a small transition region,
4.98VPP.
typically (V+) – 1.4V to (V+) – 1.2V, in which both
pairs are on. This 200mV transition region, shown in
Power-supply pins should be bypassed with 0.01
μF
Figure 20, can vary ±300mV with process variation.
ceramic capacitors.
Thus, the transition region (both stages on) can range
from (V+) – 1.7V to (V+) – 1.5V on the low end, up to
(V+) – 1.1V to (V+) – 0.9V on the high end. Within the
200mV
transition
region
PSRR,
CMRR,
offset
voltage, offset drift, and THD may be degraded
compared to operation outside this region.
Figure 19. The OPA348 Features Rail-to-Rail
Input/Output
OPERATING VOLTAGE
The OPA348 series op amps are fully specified and
tested from +2.5V to +5.5V. However, supply voltage
may range from +2.1V to +5.5V. Parameters are
tested over the specified supply range—a unique
Figure 20. Behavior of Typical Transition Region
feature of the OPA348 series. In addition, all
at Room Temperature
temperature specifications apply from –40°C to
+125°C. Most behavior remains virtually unchanged
throughout
the
full
operating
voltage
range.
Parameters that vary significantly with operating
voltages or temperature are shown in the Typical
Characteristics.
8
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Copyright © 2001–2013, Texas Instruments Incorporated
Product Folder Links: OPA348 OPA2348 OPA4348


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