OPA227P Equivalent & Substitute Parts Reference

Part Overview

The OPA227P is a general-purpose operational amplifier manufactured by Texas Instruments in 8-DIP through-hole packaging. This device is classified as Last Time Buy, indicating discontinued production with limited remaining inventory (23,305 pcs). The OPA227P serves applications requiring low input bias current (2.5 nA), low input offset voltage (5 µV), and moderate bandwidth (8 MHz) within a wide supply voltage range (5V to 36V). Identification of equivalent and substitute parts is necessary due to the Last Time Buy status and to support design flexibility across packaging technologies and performance tiers.

Key Parameters

Parameter	OPA227P Value	Unit	Substitution Relevance
Amplifier Type	General Purpose	—	Core functional classification
Number of Circuits	1	—	Single-channel requirement
Slew Rate	2.3	V/µs	Signal transient response capability
Gain Bandwidth Product	8	MHz	Frequency response and stability
Current - Input Bias	2.5	nA	Input impedance and offset drift
Voltage - Input Offset	5	µV	DC accuracy and precision
Current - Supply	3.7	mA	Power consumption
Current - Output / Channel	45	mA	Load driving capability
Voltage - Supply Span (Min)	5	V	Minimum operating voltage
Voltage - Supply Span (Max)	36	V	Maximum operating voltage
Operating Temperature	-40°C ~ 85°C	—	Environmental operating range
Mounting Type	Through Hole	—	PCB assembly technology
Package / Case	8-DIP (0.300", 7.62mm)	—	Physical footprint and pinout
RoHS Status	ROHS3 Compliant	—	Environmental compliance

Substitute Part Grouping Explanation

Substitution of the OPA227P is determined by strict alignment of electrical and mechanical parameters. The following criteria establish valid substitute relationships:

Primary Substitution Criteria:

Amplifier Type: General Purpose (functional equivalence)
Number of Circuits: 1 (single-channel requirement)
Gain Bandwidth Product: 8 MHz (frequency response matching)
Voltage Supply Range: Minimum 5V, Maximum 36V (supply compatibility)
Package / Case: 8-DIP through-hole (mechanical and pinout compatibility)
Operating Temperature: Support for -40°C ~ 85°C range (environmental compatibility)

Secondary Compatibility Parameters:

Slew Rate: 2.3 V/µs or higher (transient response)
Input Bias Current: ≤ 2.5 nA (low-drift requirement)
Input Offset Voltage: ≤ 5 µV (precision requirement)
Output Current: ≥ 45 mA (load capability)

Substitutes are grouped into two categories: Direct Equivalents (identical electrical specifications and through-hole 8-DIP packaging) and Functional Equivalents (matching core parameters with alternative packaging or slightly relaxed specifications within acceptable tolerance).

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (nA)	Input Offset (µV)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package	Status
OPA227P	Texas Instruments	General Purpose	2.3	8	2.5	5	5	36	-40 ~ 85	8-DIP	Last Time Buy
OPA227U/2K5	Texas Instruments	General Purpose	2.3	8	2.5	5	5	36	-40 ~ 85	8-SOIC	Active
LT1007ACN8#PBF	Analog Devices	General Purpose	2.5	8	10	10	8	36	0 ~ 70	8-DIP	Active
LT1007IN8#PBF	Analog Devices	General Purpose	2.5	8	15	20	8	36	-40 ~ 85	8-DIP	Active
OP27EN8#PBF	Analog Devices	General Purpose	2.8	8	10	10	8	36	-25 ~ 85	8-DIP	Last Time Buy
OP27EPZ	Analog Devices	General Purpose	2.8	8	10	10	8	36	0 ~ 70	8-DIP	Active
OP27GN8#PBF	Analog Devices	General Purpose	2.8	8	15	30	8	36	-25 ~ 85	8-DIP	Last Time Buy
OP27GPZ	Analog Devices	General Purpose	2.8	8	15	30	8	36	-40 ~ 85	8-DIP	Active
OP07DN8#PBF	Analog Devices	General Purpose	0.25	0.6	2	60	6	36	0 ~ 70	8-DIP	Active
OP07EN8#PBF	Analog Devices	General Purpose	0.25	0.6	1.2	30	6	36	0 ~ 70	8-DIP	Active
LT1360CN8#PBF	Analog Devices	Voltage Feedback	800	50	300	300	5	30	0 ~ 70	8-DIP	Active

Engineering Selection Recommendations

Tier 1: Direct Electrical & Packaging Equivalents

OPA227U/2K5 (Texas Instruments) represents the direct functional equivalent with identical electrical specifications (2.3 V/µs slew rate, 8 MHz GBW, 2.5 nA input bias, 5 µV offset). The primary difference is packaging: surface-mount 8-SOIC versus through-hole 8-DIP. This substitute is suitable for new designs utilizing surface-mount assembly technology. Product status is Active with 2,076 pcs inventory.

Tier 2: Functional Equivalents with Relaxed Input Specifications

LT1007IN8#PBF (Analog Devices) maintains 8 MHz bandwidth and 8-DIP through-hole packaging with Active product status and -40°C ~ 85°C operating range matching the OPA227P. Input bias current (15 nA) and input offset voltage (20 µV) are relaxed compared to OPA227P specifications. Minimum supply voltage increases to 8V. This substitute is applicable where precision requirements are less stringent than OPA227P specifications.

Tier 3: Enhanced Performance Alternatives

OP27GPZ (Analog Devices) provides identical 8 MHz bandwidth in 8-DIP through-hole packaging with Active status and -40°C ~ 85°C temperature range. Slew rate is marginally improved (2.8 V/µs vs. 2.3 V/µs). Input bias current (15 nA) and offset voltage (30 µV) are relaxed. Minimum supply voltage is 8V. This part is suitable for applications where slightly improved transient response is beneficial and precision requirements are less critical.

Tier 4: Precision-Optimized Alternatives

OP07EN8#PBF (Analog Devices) offers superior input bias current (1.2 nA) and low offset voltage (30 µV) in 8-DIP through-hole packaging. However, bandwidth is significantly reduced (600 kHz vs. 8 MHz) and slew rate is substantially lower (0.25 V/µs). This substitute is restricted to low-frequency precision applications where bandwidth is not a limiting factor.

Tier 5: High-Speed Alternative

LT1360CN8#PBF (Analog Devices) provides significantly enhanced slew rate (800 V/µs) and bandwidth (50 MHz) in 8-DIP through-hole packaging with Active status. However, input bias current (300 nA) and offset voltage (300 µV) are substantially degraded. Maximum supply voltage is limited to 30V. This substitute is applicable only to high-speed applications where precision is secondary and supply voltage does not exceed 30V.

Compliance & Availability: All recommended substitutes maintain ROHS3 compliance and REACH unaffected status. Inventory availability ranges from 923 to 17,408 pcs across the substitute options. Selection should prioritize Active status parts (OPA227U/2K5, LT1007IN8#PBF, OP27EPZ, OP27GPZ, OP07EN8#PBF, LT1360CN8#PBF) over Last Time Buy alternatives (OP27EN8#PBF, OP27GN8#PBF) for long-term design sustainability.

Frequently Asked Questions (FAQ)

Q1: Can OPA227U/2K5 replace OPA227P in existing through-hole PCB designs?

A: OPA227U/2K5 is electrically identical to OPA227P but uses 8-SOIC surface-mount packaging instead of 8-DIP through-hole. Direct PCB substitution is not possible without redesigning the board layout and assembly process. OPA227U/2K5 is suitable only for new designs utilizing surface-mount technology.

Q2: What is the minimum supply voltage difference between OPA227P and LT1007IN8#PBF?

A: OPA227P operates at minimum 5V supply voltage. LT1007IN8#PBF requires minimum 8V supply voltage. Designs operating at 5V to 7.9V supply cannot use LT1007IN8#PBF as a substitute. Verify actual circuit supply voltage before selection.

Q3: Are OP27 series parts (OP27EN8#PBF, OP27EPZ, OP27GN8#PBF, OP27GPZ) direct replacements for OPA227P?

A: OP27 series parts share identical 8 MHz bandwidth and 8-DIP through-hole packaging. However, minimum supply voltage is 8V (versus 5V for OPA227P), and input bias current and offset voltage specifications are relaxed. OP27 parts are functionally compatible only in circuits operating at 8V or higher supply voltage with less stringent precision requirements.

Q4: Why is OP07EN8#PBF listed as a substitute despite significantly lower bandwidth?

A: OP07EN8#PBF is included as a substitute option for applications where bandwidth is not a performance-limiting factor. The 600 kHz bandwidth is suitable for low-frequency precision applications (instrumentation, sensor conditioning, audio). Selection requires explicit verification that 600 kHz bandwidth is acceptable for the target application.

Q5: What is the primary limitation of LT1360CN8#PBF as an OPA227P substitute?

A: LT1360CN8#PBF is classified as Voltage Feedback amplifier type (versus General Purpose for OPA227P) with substantially different electrical characteristics: 800 V/µs slew rate, 50 MHz bandwidth, 300 nA input bias, and 300 µV offset voltage. Maximum supply voltage is limited to 30V. This part is suitable only for high-speed applications where precision is secondary and supply voltage does not exceed 30V.

Q6: Which substitute offers the best long-term availability?

A: OP27GPZ (Analog Devices) has the highest inventory (17,408 pcs) and Active product status, indicating sustained manufacturing support. For designs requiring long-term component availability and supply chain stability, OP27GPZ is the recommended choice among through-hole 8-DIP alternatives.

Q7: Can I use OP27EN8#PBF or OP27GN8#PBF despite Last Time Buy status?

A: Both OP27EN8#PBF (2,100 pcs) and OP27GN8#PBF (1,047 pcs) are available in current inventory. However, Last Time Buy status indicates discontinued production with no future replenishment. These parts are suitable only for designs with defined production end-of-life or limited production quantities. New designs should prioritize Active status alternatives.

Q8: What is the temperature range difference between OPA227P and OP27EPZ?

A: OPA227P operates across -40°C ~ 85°C. OP27EPZ is rated for 0°C ~ 70°C, a narrower range. Designs requiring operation below 0°C or above 70°C cannot use OP27EPZ. Verify actual operating temperature requirements before selection.

Q9: Are there any substitutes with identical specifications to OPA227P?

A: OPA227U/2K5 is electrically identical (2.3 V/µs, 8 MHz, 2.5 nA, 5 µV, -40°C ~ 85°C) but uses surface-mount 8-SOIC packaging. No through-hole 8-DIP substitute maintains all OPA227P specifications. All other through-hole alternatives involve trade-offs in precision, bandwidth, or supply voltage range.

Q10: How do I determine which substitute is appropriate for my application?

A: Identify the three most critical parameters for your application: (1) operating supply voltage range, (2) required bandwidth or slew rate, and (3) precision requirements (input bias current and offset voltage). Cross-reference these against the Parameter Comparison table. Prioritize Active status parts for new designs. Consult application-specific datasheets for detailed performance characteristics before final selection.

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