OPA277P Equivalent & Substitute Parts

Part Overview

The OPA277P is a general-purpose operational amplifier manufactured by Texas Instruments in 8-PDIP through-hole packaging. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The OPA277P operates across a wide supply voltage range (4V to 36V) and temperature range (-40°C to 85°C), making it suitable for general analog signal processing applications. Finding equivalent and substitute parts is necessary due to the Last Time Buy status and to support design flexibility across different packaging technologies and performance requirements.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Slew Rate	0.8	V/µs
Gain Bandwidth Product	1	MHz
Current - Input Bias	500	pA
Voltage - Input Offset	10	µV
Current - Supply	790	µA
Current - Output / Channel	35	mA
Voltage - Supply Span (Min)	4	V
Voltage - Supply Span (Max)	36	V
Operating Temperature	-40 to 85	°C
Mounting Type	Through Hole	—
Package / Case	8-DIP (0.300", 7.62mm)	—

Substitute Part Grouping Explanation

Substitution of the OPA277P is determined by the following critical parameters:

Electrical Compatibility Criteria:

Amplifier Type (General Purpose vs. Instrumentation vs. Voltage Feedback)
Slew Rate (0.8V/µs baseline)
Gain Bandwidth Product (1 MHz baseline)
Current - Input Bias (500 pA baseline)
Voltage - Input Offset (10 µV baseline)
Supply voltage range compatibility (4V to 36V minimum requirement)
Operating temperature range (-40°C to 85°C minimum requirement)
Output current capability (35 mA minimum requirement)

Mechanical Compatibility Criteria:

Mounting Type (Through Hole vs. Surface Mount)
Package / Case format (8-DIP vs. 8-SOIC vs. 5-TSOP)

Regulatory & Compliance Criteria:

RoHS3 Compliance
REACH Status

Substitutes are grouped into two categories: Direct Package Equivalents (same 8-DIP through-hole format) and Functional Equivalents (different package types with compatible electrical specifications).

Parameter Comparison

Parameter	OPA277P	OPA277U/2K5	OP07CPZ	OP07EN8#PBF	LT1167CN8#PBF	LT1167IN8#PBF	NCS21911SN2T1G	LT1360CN8#PBF
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices	Analog Devices	Analog Devices	Analog Devices	onsemi	Analog Devices
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	Instrumentation	Instrumentation	Zero-Drift	Voltage Feedback
Slew Rate (V/µs)	0.8	0.8	0.3	0.25	1.2	1.2	1.6	800
Gain Bandwidth Product (MHz)	1	1	1	0.6	1	1	2	50
Current - Input Bias (pA)	500	500	1800	1200	80	80	100	300 nA
Voltage - Input Offset (µV)	10	10	60	30	20	20	1	300
Current - Supply (µA)	790	790	—	—	900	900	475	4000
Current - Output / Channel (mA)	35	35	—	—	—	27	18	34
Voltage - Supply Span Min (V)	4	4	6	6	4.6	4.6	4	5
Voltage - Supply Span Max (V)	36	36	36	36	36	36	36	30
Operating Temperature (°C)	-40 to 85	-40 to 85	-40 to 85	0 to 70	0 to 70	-40 to 85	-40 to 125	0 to 70
Mounting Type	Through Hole	Surface Mount	Through Hole	Through Hole	Through Hole	Through Hole	Surface Mount	Through Hole
Package / Case	8-DIP	8-SOIC	8-DIP	8-DIP	8-DIP	8-DIP	5-TSOP	8-DIP
Product Status	Last Time Buy	Active	Active	Active	Active	Active	Active	Active
RoHS3 Compliant	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes

Engineering Selection Recommendations

Category 1: Direct Package Equivalent (8-DIP Through-Hole, General Purpose)

OPA277U/2K5 is the primary substitute for OPA277P when surface-mount technology is acceptable. Both devices share identical electrical specifications (0.8V/µs slew rate, 1 MHz gain bandwidth product, 500 pA input bias current, 10 µV input offset voltage). The OPA277U/2K5 is packaged in 8-SOIC surface-mount format and maintains Active product status with full supply voltage range compatibility (4V to 36V) and operating temperature range (-40°C to 85°C). This substitute is recommended for new designs or PCB redesigns supporting surface-mount assembly.

OP07CPZ and OP07EN8#PBF are general-purpose amplifiers in 8-DIP through-hole packaging with Active product status. Both maintain the same package footprint as OPA277P. OP07CPZ operates across the full temperature range (-40°C to 85°C) with 0.3V/µs slew rate and 1 MHz gain bandwidth product. OP07EN8#PBF operates within 0°C to 70°C temperature range with reduced slew rate (0.25V/µs) and 600 kHz gain bandwidth product. These devices exhibit higher input bias current (1.8 nA and 1.2 nA respectively) and higher input offset voltage (60 µV and 30 µV respectively) compared to OPA277P. Minimum supply voltage requirement is 6V (versus 4V for OPA277P). Selection between OP07CPZ and OP07EN8#PBF depends on temperature range requirements and acceptable performance degradation in slew rate and bandwidth.

Category 2: Instrumentation Amplifier Substitutes (8-DIP Through-Hole)

LT1167CN8#PBF and LT1167IN8#PBF are instrumentation amplifiers with 1 Circuit configuration in 8-DIP through-hole packaging. Both devices maintain 1 MHz gain bandwidth product and 1.2V/µs slew rate. LT1167CN8#PBF operates within 0°C to 70°C temperature range, while LT1167IN8#PBF extends to -40°C to 85°C. Both exhibit lower input bias current (80 pA) and higher input offset voltage (20 µV) compared to OPA277P. Minimum supply voltage is 4.6V. Output current capability differs: LT1167CN8#PBF specification not provided; LT1167IN8#PBF provides 27 mA. These substitutes are applicable only when instrumentation amplifier functionality (differential input stage with high input impedance) is compatible with circuit requirements.

Category 3: Advanced Performance Substitutes

NCS21911SN2T1G is a zero-drift amplifier in 5-TSOP surface-mount packaging with Active product status. This device provides superior input offset voltage (1 µV versus 10 µV) and extended operating temperature range (-40°C to 125°C). Slew rate is 1.6V/µs and gain bandwidth product is 2 MHz. Input bias current is 100 pA. Supply voltage range is 4V to 36V. Output current is limited to 18 mA. This substitute is suitable for applications requiring reduced offset voltage and extended temperature operation, with acceptance of surface-mount packaging and reduced output current.

LT1360CN8#PBF is a voltage feedback amplifier in 8-DIP through-hole packaging with significantly enhanced performance specifications: 800V/µs slew rate and 50 MHz gain bandwidth product. However, this device exhibits higher input bias current (300 nA), higher input offset voltage (300 µV), and higher supply current (4 mA). Maximum supply voltage is limited to 30V (versus 36V for OPA277P). Operating temperature range is 0°C to 70°C. This substitute is applicable only for high-speed applications where the performance trade-offs are acceptable.

All substitute parts maintain RoHS3 compliance and REACH unaffected status consistent with OPA277P.

Frequently Asked Questions (FAQ)

Q1: Can OPA277U/2K5 replace OPA277P in existing designs?

OPA277U/2K5 provides electrical equivalence with identical specifications. The primary difference is packaging: OPA277U/2K5 uses 8-SOIC surface-mount format while OPA277P uses 8-DIP through-hole format. Direct PCB substitution is not possible without redesign. OPA277U/2K5 is suitable for new designs or boards redesigned for surface-mount assembly.

Q2: What is the difference between general-purpose and instrumentation amplifier substitutes?

General-purpose amplifiers (OPA277P, OP07CPZ, OP07EN8#PBF, OPA277U/2K5) are single-stage amplifiers with moderate input impedance. Instrumentation amplifiers (LT1167CN8#PBF, LT1167IN8#PBF) feature differential input stages with very high input impedance and are optimized for precision measurement applications. Substitution between these categories requires circuit compatibility verification.

Q3: Why do OP07 devices have higher minimum supply voltage (6V) than OPA277P (4V)?

OP07 series devices are specified with 6V minimum supply voltage. OPA277P operates at 4V minimum. Designs operating below 6V supply voltage cannot use OP07 substitutes without circuit modification.

Q4: Is NCS21911SN2T1G suitable for applications requiring 35 mA output current?

No. NCS21911SN2T1G provides maximum 18 mA output current per channel, which is insufficient for applications requiring 35 mA. This substitute is applicable only for applications with output current requirements not exceeding 18 mA.

Q5: Can LT1360CN8#PBF be used in designs requiring 36V supply voltage?

No. LT1360CN8#PBF maximum supply voltage is 30V. Designs requiring 36V supply voltage cannot use this substitute.

Q6: What is the significance of the Last Time Buy status for OPA277P?

Last Time Buy status indicates Texas Instruments has discontinued production. Existing inventory (6030 Pcs) is available but will not be replenished. New designs should transition to active substitute parts such as OPA277U/2K5 (same electrical specifications, active status) or alternative general-purpose amplifiers with compatible specifications.

Q7: Which substitute provides the best input offset voltage performance?

NCS21911SN2T1G provides 1 µV input offset voltage, superior to OPA277P (10 µV). This device is recommended for precision applications where minimized offset voltage is critical, provided surface-mount packaging and 18 mA maximum output current are acceptable.

Q8: Are all substitute parts RoHS3 compliant?

Yes. All substitute parts listed (OPA277U/2K5, OP07CPZ, OP07EN8#PBF, LT1167CN8#PBF, LT1167IN8#PBF, NCS21911SN2T1G, LT1360CN8#PBF) maintain RoHS3 compliance consistent with OPA277P.

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