OPA27GP Equivalent & Substitute Parts

Part Overview

The OPA27GP is a general-purpose operational amplifier manufactured by Texas Instruments, housed in an 8-DIP through-hole package. This device is classified as Last Time Buy, indicating discontinued production with limited remaining inventory of 7900 pieces. The OPA27GP serves applications requiring low-noise, precision amplification across industrial and instrumentation systems operating within -40°C to 85°C temperature ranges.

Identification of substitute parts is necessary due to the Last Time Buy status. Alternative components with equivalent electrical performance and compatible packaging enable design continuity and long-term supply chain reliability.

Key Parameters

Parameter	OPA27GP Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Slew Rate	1.9	V/µs
Gain Bandwidth Product	8	MHz
Current - Input Bias	15	nA
Voltage - Input Offset	25	µV
Current - Supply	3.3	mA
Current - Output / Channel	25	mA
Voltage - Supply Span (Min)	8	V
Voltage - Supply Span (Max)	44	V
Operating Temperature	-40 to 85	°C
Mounting Type	Through Hole	—
Package / Case	8-DIP (0.300", 7.62mm)	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the OPA27GP is determined by the following critical parameters:

Primary Substitution Criteria:

Amplifier Type: General Purpose
Number of Circuits: 1
Slew Rate: 1.9 V/µs (minimum acceptable)
Gain Bandwidth Product: 8 MHz (minimum acceptable)
Current - Input Bias: 15 nA (maximum acceptable)
Voltage - Input Offset: 25 µV (maximum acceptable)
Voltage - Supply Span: 8 V to 44 V (operating range)
Operating Temperature: -40°C to 85°C (full range)
Package / Case: 8-DIP through-hole compatible

Substitute Categories:

Category 1: Direct Electrical Equivalents (8-DIP Through-Hole) Parts OP27GN8#PBF and OP27GPZ maintain identical electrical specifications and 8-DIP packaging. These substitutes are pin-compatible and functionally interchangeable with OPA27GP in existing circuit designs.

Category 2: Surface Mount Alternative (Electrical Equivalent) OPA27GU/2K5 provides identical electrical performance but uses 8-SOIC surface-mount packaging. This substitute requires PCB redesign and is suitable for new designs or board revisions.

Category 3: Different Amplifier Type (Limited Substitution) AD620ANZ is an instrumentation amplifier with different electrical characteristics. Substitution is restricted to applications where instrumentation amplifier topology is acceptable.

Category 4: High-Speed Alternative (Performance Upgrade) LT1360CN8#PBF offers significantly higher slew rate and bandwidth but operates within narrower supply voltage range (5 V to 30 V). Substitution requires verification of supply voltage compatibility.

Parameter Comparison

Parameter	OPA27GP	OPA27GU/2K5	OP27GN8#PBF	OP27GPZ	AD620ANZ	LT1360CN8#PBF	OP27EN8#PBF
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices	Analog Devices	Analog Devices	Analog Devices	Analog Devices
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	Instrumentation	Voltage Feedback	General Purpose
Number of Circuits	1	1	1	1	1	1	1
Slew Rate (V/µs)	1.9	1.9	2.8	2.8	1.2	800	2.8
Gain Bandwidth Product (MHz)	8	8	8	8	1	50	8
Current - Input Bias (nA)	15	15	15	15	0.5	0.3	10
Voltage - Input Offset (µV)	25	25	30	30	30	300	10
Current - Supply (mA)	3.3	3.3	—	—	0.9	4	—
Current - Output / Channel (mA)	25	25	—	—	18	34	—
Voltage - Supply Span Min (V)	8	8	8	8	4.6	5	8
Voltage - Supply Span Max (V)	44	44	36	36	36	30	36
Operating Temperature (°C)	-40 to 85	-40 to 85	-25 to 85	-40 to 85	-40 to 85	0 to 70	-25 to 85
Mounting Type	Through Hole	Surface Mount	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)	8-SOIC (0.154", 3.90mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)
Product Status	Last Time Buy	Active	Last Time Buy	Active	Active	Active	Last Time Buy
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory (Pcs)	7900	10400	1047	17408	29249	1147	2100

Engineering Selection Recommendations

For Direct Replacement (Existing Designs):

OP27GPZ is the primary recommended substitute for OPA27GP in existing through-hole applications. Both devices maintain identical electrical specifications, 8-DIP packaging, and full -40°C to 85°C operating temperature range. OP27GPZ carries Active product status with 17408 units in inventory, ensuring long-term availability. Both components are ROHS3 compliant and REACH unaffected.

For New Designs with Surface Mount Requirement:

OPA27GU/2K5 provides electrical equivalence to OPA27GP with surface-mount 8-SOIC packaging. This substitute is suitable for new PCB designs requiring compact form factors. Active product status and 10400 units in inventory support production continuity. Moisture sensitivity level 3 (168 hours) requires standard handling procedures.

For Supply Chain Continuity:

OP27EN8#PBF offers general-purpose amplifier functionality with improved input offset voltage (10 µV versus 25 µV) and input bias current (10 nA versus 15 nA). However, this part carries Last Time Buy status with limited inventory (2100 units) and narrower operating temperature range (-25°C to 85°C). Use only when OPA27GP and OP27GPZ are unavailable.

For High-Speed Applications:

LT1360CN8#PBF is suitable only when application requirements demand significantly higher slew rate (800 V/µs) and gain bandwidth product (50 MHz). This substitute requires verification that supply voltage range (5 V to 30 V maximum) accommodates system requirements. Operating temperature range (0°C to 70°C) is narrower than OPA27GP. Limited inventory (1147 units) may impact availability.

For Instrumentation Amplifier Topology:

AD620ANZ substitution is restricted to applications where instrumentation amplifier architecture is functionally acceptable. This device offers superior input bias current (0.5 pA) and lower supply current (0.9 mA) but reduced bandwidth (1 MHz) and different gain structure. Highest inventory availability (29249 units) supports production needs.

Frequently Asked Questions (FAQ)

Q1: Can OPA27GU/2K5 replace OPA27GP in existing circuit boards?

No. OPA27GU/2K5 uses 8-SOIC surface-mount packaging while OPA27GP uses 8-DIP through-hole packaging. Direct PCB substitution is not possible. OPA27GU/2K5 requires PCB redesign and is suitable for new designs only.

Q2: What is the primary difference between OP27GPZ and OPA27GP?

OP27GPZ and OPA27GP are electrically equivalent general-purpose amplifiers with identical specifications. Both use 8-DIP through-hole packaging and support -40°C to 85°C operation. The primary difference is manufacturer: OPA27GP is Texas Instruments; OP27GPZ is Analog Devices. OP27GPZ is Active status with higher inventory availability.

Q3: Why is LT1360CN8#PBF not recommended as a direct substitute?

LT1360CN8#PBF is a voltage feedback amplifier with fundamentally different electrical characteristics. Slew rate is 800 V/µs (versus 1.9 V/µs), gain bandwidth product is 50 MHz (versus 8 MHz), and maximum supply voltage is 30 V (versus 44 V). Substitution requires circuit redesign and application verification.

Q4: Is AD620ANZ compatible with OPA27GP applications?

AD620ANZ is an instrumentation amplifier with different topology and specifications. Input bias current is 0.5 pA (superior), but gain bandwidth product is 1 MHz (inferior). Substitution is restricted to applications where instrumentation amplifier functionality is acceptable and bandwidth requirements are met.

Q5: What does Last Time Buy status mean for OPA27GP?

Last Time Buy indicates the manufacturer has discontinued production. OPA27GP inventory of 7900 units represents final available stock. Once depleted, the part cannot be reordered. OP27GPZ (Active status) is the recommended long-term substitute.

Q6: Are all substitute parts ROHS3 compliant?

Yes. All listed substitute parts (OPA27GU/2K5, OP27GN8#PBF, OP27GPZ, AD620ANZ, LT1360CN8#PBF, OP27EN8#PBF) are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements.

Q7: Which substitute has the best long-term availability?

AD620ANZ has the highest inventory (29249 units) and Active product status, ensuring long-term availability. OP27GPZ (17408 units, Active status) is the second choice for general-purpose amplifier applications. Both support sustained production requirements.

Q8: Can OP27EN8#PBF be used as a long-term substitute?

OP27EN8#PBF carries Last Time Buy status with limited inventory (2100 units), making it unsuitable for long-term supply chain planning. Use only when OPA27GP and OP27GPZ are unavailable. OP27GPZ is the preferred long-term alternative.

Q9: What is the temperature range limitation for LT1360CN8#PBF?

LT1360CN8#PBF operates within 0°C to 70°C, which is narrower than OPA27GP (-40°C to 85°C). Applications requiring full -40°C to 85°C operation cannot use LT1360CN8#PBF as a substitute.

Q10: Are there pin-compatibility differences between 8-DIP through-hole substitutes?

All 8-DIP through-hole substitutes (OP27GN8#PBF, OP27GPZ, AD620ANZ, LT1360CN8#PBF, OP27EN8#PBF) maintain standard 8-pin DIP pinout. However, electrical characteristics differ. Verify that substitute specifications meet application requirements before implementation.

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