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The OP-221 is a monolithic dual operational amplifier ..
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OP221
Dual Low Power Operational Amplifier, Single or Dual Supply
REV. C
Dual Low Power Operational Amplifier,
Single or Dual Supply
FEATURES
Excellent TCVOS Match, 2 �V/�C Max
Low Input Offset Voltage, 150 �V Max
Low Supply Current, 550 �A Max
Single Supply Operation, 5 V to 30 V
Low Input Offset Voltage Drift, 0.75 �V/�C
High Open-Loop Gain, 1500 V/mV Min
High PSRR, 3 �V/V
Wide Common-Mode Voltage
Range, V– to within 1.5 V of V+
Pin Compatible with 1458, LM158, LM2904
Available in Die Form
GENERAL DESCRIPTIONThe OP221 is a monolithic dual operational amplifier that can
be used either in single or dual supply operation. The wide
supply voltage range, wide input voltage range, and low supply
current drain of the OP221 make it well-suited for operation
from batteries or unregulated power supplies.
The excellent specifications of the individual amplifiers combined
with the tight matching and temperature tracking between channels
SIMPLIFIED SCHEMATIC
8-Lead SOIC
(S-Suffix)
PIN CONNECTIONSprovide high performance in instrumentation amplifier designs.
The individual amplifiers feature very low input offset voltage,
low offset voltage drift, low noise voltage, and low bias current.
They are fully compensated and protected.
Matching between channels is provided on all critical parameters
including input offset voltage, tracking of offset voltage vs. tem-
perature, non-inverting bias currents, and common-mode rejection.
OP221–SPECIFICATIONS
OP221G
(Electrical Characteristics at Vs = �2.5 V to �15 V, TA = 25�C, unless otherwise noted.)
OP221
SPECIFICATIONS(Electrical Characteristics at VS = �2.5 V to �15 V, –40�C £ TA £ +85�C, unless otherwise noted.)
OP221GNOTESSample tested.Guaranteed by CMRR test limits.
OP221GNOTESDCMRR is 20 log10 VCM/DCME, where VCM is the voltage applied to both noninverting inputs and DCME is the difference in common-mode input-referred error.DPSRR is: Input-Referred Differential ErrorDVS
Matching Characteristics at Vs = �15 V, TA = 25�C, unless otherwise noted.
OP221–SPECIFICATIONS
OP221GNOTESDCMRR is 20 log10 VCM/DCME, where VCM is the voltage applied to both noninverting inputs and DCME is the difference in common-mode input-referred error.DPSRR is: Input-Referred Differential ErrorDVS
(Matching Characteristics at Vs = �15 V, –40�C £ TA £ +85�C for OP221G, unless other-
wise noted. G is sample tested.)
CAUTIONESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000V readily
accumulate on the human body and test equipment and can discharge without detection. Although
the OP221 features proprietary ESD protection circuitry, permanent damage may occur on devices
subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions are
recommended to avoid performance degradation or loss of functionality.
ABSOLUTE MAXIMUM RATINGS (Note 1)Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±18 V
Differential Input Voltage . . . . . . . . . .30 V or Supply Voltage
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . .Supply Voltage
Output Short-Circuit Duration . . . . . . . . . . . . . . . .Indefinite
Storage Temperature Range . . . . . . . . . . . .–65∞C to +150∞C
Operating Temperature Range
OP221G . . . . . . . . . . . . . . . . . . . . . . . . . . . .–40∞C to +85∞C
Lead Temperature (Soldering 60 sec) . . . . . . . . . . . . . .300∞C
Junction Temperature (TJ) . . . . . . . . . . . . .–65∞C to +150∞C
Figure 1. Dice Characteristics
NOTESAbsolute maximum ratings apply to both DICE and packaged parts, unless
otherwise noted.�JA is specified for device soldered to printed circuit board for SOIC package.
ORDERING GUIDE
OP221–Typical Perfomance CharacteristicsTPC 1.Open-Loop Gain at ±15 V vs.
Temperature
TPC 4.Open-Loop Gain at ±15 V vs.
Frequency
TEMPERATURE – �C
PHASE MARGIN –
Degrees
850k
800k
750k
700k
650k
GAIN B
AND
WIDTH – Hz
SLEW RA
TE –
secTPC 7.Phase Margin, Gain Bandwidth,
and Slew Rate vs. Temperature
TPC 2.Open-Loop Gain at ± 5 V vs.
Temperature
TPC 5.Closed-Loop Gain vs.
Frequency
TPC 8.PSRR vs. Frequency
TPC 3.Open-Loop Gain at vs.
Supply Voltage
TPC 6.Gain and Phase Shift vs.
Frequency
CMRR – Hz
FREQUENCY – Hz
1001001k10k100kTPC 9.CMRR vs. Frequency
