OPA177GP Equivalent & Substitute Parts Reference

Part Overview

The OPA177GP 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 (3933 pcs). The OPA177GP serves applications requiring low-noise, precision amplification across industrial and instrumentation systems with supply voltages ranging from 6V to 36V and operating temperatures from -40°C to 85°C.

Substitute parts are necessary due to the Last Time Buy status of the OPA177GP. Alternative components with equivalent electrical characteristics and compatible packaging enable design continuity and long-term supply chain reliability.

Key Parameters

Parameter	OPA177GP	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Slew Rate	0.3	V/µs
Gain Bandwidth Product	600	kHz
Current - Input Bias	500	pA
Voltage - Input Offset	20	µV
Current - Supply	1.3	mA
Voltage - Supply Span (Min)	6	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)	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the OPA177GP is determined by the following critical parameters:

Primary Substitution Criteria:

Amplifier Type: General Purpose
Number of Circuits: 1
Slew Rate: 0.3 V/µs (±tolerance acceptable)
Gain Bandwidth Product: 600 kHz (±tolerance acceptable)
Voltage Supply Range: Minimum 6V, Maximum 36V
Operating Temperature Range: -40°C to 85°C (or compatible subset)
Package / Case: 8-DIP through-hole configuration
RoHS Compliance: ROHS3 Compliant

Secondary Compatibility Parameters:

Current - Input Bias: 500 pA (±tolerance acceptable)
Voltage - Input Offset: 20 µV (±tolerance acceptable)
Current - Supply: 1.3 mA (±tolerance acceptable)

Substitute parts are grouped into two categories:

Category 1: Direct Package & Electrical Equivalents (8-DIP Through-Hole) Parts maintaining identical package form factor, mounting type, and core electrical specifications within acceptable tolerance ranges.

Category 2: Functional Equivalents with Modified Specifications Parts with 8-DIP through-hole packaging and general-purpose amplifier classification but with electrical parameters outside the primary tolerance band. These require application-level verification of compatibility.

Parameter Comparison

Part Number	Manufacturer	Slew Rate (V/µs)	GBW (kHz)	Input Bias (pA)	Input Offset (µV)	Supply Current (mA)	Temp Range (°C)	Package	Status
OPA177GP	Texas Instruments	0.3	600	500	20	1.3	-40 to 85	8-DIP	Last Time Buy
OPA177GS/2K5	Texas Instruments	0.3	600	500	20	1.3	-40 to 85	8-SOIC	Active
OP177GPZ	Analog Devices Inc.	0.3	600	1.2	20	1.6	-40 to 85	8-DIP	Active
OP177FPZ	Analog Devices Inc.	0.3	600	1.2	10	1.6	-40 to 85	8-DIP	Active
OP07DP	Analog Devices Inc.	0.3	600	12	150	—	0 to 70	8-DIP	Obsolete
OP07CN8#PBF	Analog Devices Inc.	0.25	600	1.8	60	—	0 to 70	8-DIP	Active
LT1001ACN8#PBF	Analog Devices Inc.	0.25	800	500	10	—	0 to 125	8-DIP	Active
LT1001CN8#PBF	Analog Devices Inc.	0.25	800	700	18	—	0 to 125	8-DIP	Active
LT1007ACN8#PBF	Analog Devices Inc.	2.5	8000	10	10	—	0 to 70	8-DIP	Active
LT1007CN8#PBF	Analog Devices Inc.	2.5	8000	15	20	—	0 to 70	8-DIP	Active
LT1360CN8#PBF	Analog Devices Inc.	800	50000	300	300	4	0 to 70	8-DIP	Active

Engineering Selection Recommendations

Tier 1: Recommended Direct Substitutes (Highest Compatibility)

OP177GPZ (Analog Devices Inc.) — Active product status with 8-DIP through-hole packaging. Electrical specifications align with OPA177GP across slew rate (0.3 V/µs), gain bandwidth product (600 kHz), and supply voltage range (6V to 36V). Operating temperature range (-40°C to 85°C) matches the original specification. Input bias current (1.2 nA) and input offset voltage (20 µV) remain within acceptable tolerance. ROHS3 compliant with MSL 1 rating ensures long-term reliability.

OP177FPZ (Analog Devices Inc.) — Active product status with identical package and core electrical characteristics. Slew rate and gain bandwidth product match OPA177GP specifications. Input offset voltage (10 µV) represents improved performance. Operating temperature range (-40°C to 85°C) and supply voltage span (6V to 36V) are equivalent. ROHS3 compliant. Suitable for applications where lower input offset voltage provides design margin.

Tier 2: Functional Substitutes with Parameter Variations (Conditional Compatibility)

OP07CN8#PBF (Analog Devices Inc.) — Active product with 8-DIP through-hole packaging and 600 kHz gain bandwidth product. Slew rate (0.25 V/µs) is slightly reduced compared to OPA177GP. Operating temperature range (0°C to 70°C) is narrower, limiting use in extended temperature applications. Input offset voltage (60 µV) is elevated. Suitable for room-temperature industrial applications where reduced slew rate is acceptable.

LT1001ACN8#PBF and LT1001CN8#PBF (Analog Devices Inc.) — Active products with 8-DIP through-hole packaging. Gain bandwidth product (800 kHz) exceeds OPA177GP specification. Slew rate (0.25 V/µs) is reduced. Operating temperature range (0°C to 125°C) extends beyond OPA177GP. Supply voltage range (6V to 36V) is compatible. Suitable for applications requiring extended temperature operation where higher bandwidth is beneficial.

Tier 3: Not Recommended for Direct Substitution

OPA177GS/2K5 (Texas Instruments) — Although electrically equivalent to OPA177GP, this part uses 8-SOIC surface-mount packaging rather than 8-DIP through-hole. Suitable only for new designs with surface-mount PCB layouts.

LT1007ACN8#PBF and LT1007CN8#PBF (Analog Devices Inc.) — Voltage feedback amplifiers with significantly elevated slew rate (2.5 V/µs) and gain bandwidth product (8 MHz). These specifications represent a different amplifier class unsuitable for direct OPA177GP replacement in precision, low-speed applications.

LT1360CN8#PBF (Analog Devices Inc.) — Voltage feedback amplifier with extreme performance parameters (800 V/µs slew rate, 50 MHz bandwidth). Fundamentally different amplifier topology and performance class. Not suitable for OPA177GP substitution.

OP07DP (Analog Devices Inc.) — Obsolete product status with narrower operating temperature range (0°C to 70°C) and significantly elevated input offset voltage (150 µV). RoHS non-compliant. Not recommended for new designs or long-term supply assurance.

Frequently Asked Questions (FAQ)

Q1: Can OPA177GS/2K5 replace OPA177GP in existing designs?

A: No. OPA177GS/2K5 uses 8-SOIC surface-mount packaging, while OPA177GP requires 8-DIP through-hole mounting. PCB layout and assembly process compatibility are not maintained. OPA177GS/2K5 is suitable only for new designs with surface-mount capability.

Q2: What is the primary difference between OP177GPZ and OP177FPZ?

A: Both parts are Analog Devices equivalents with identical package and core electrical specifications. OP177FPZ offers lower input offset voltage (10 µV vs. 20 µV), providing improved precision in applications sensitive to DC offset errors. Both maintain -40°C to 85°C operating temperature range and 8-DIP through-hole packaging.

Q3: Why is LT1007 not recommended as a substitute?

A: LT1007 series amplifiers (LT1007ACN8#PBF, LT1007CN8#PBF) represent a different amplifier class with slew rate of 2.5 V/µs and gain bandwidth product of 8 MHz. These specifications are 8 to 13 times higher than OPA177GP. This fundamental performance difference makes LT1007 unsuitable for precision, low-speed applications where OPA177GP is specified.

Q4: Can I use OP07CN8#PBF in applications requiring -40°C operation?

A: No. OP07CN8#PBF operating temperature range is 0°C to 70°C, which does not include -40°C. OPA177GP and recommended substitutes (OP177GPZ, OP177FPZ) maintain -40°C to 85°C range. Use OP07CN8#PBF only in applications with minimum operating temperature of 0°C or higher.

Q5: Are all recommended substitutes RoHS3 compliant?

A: Yes. OP177GPZ, OP177FPZ, OP07CN8#PBF, LT1001ACN8#PBF, LT1001CN8#PBF, LT1007ACN8#PBF, LT1007CN8#PBF, and LT1360CN8#PBF are all ROHS3 compliant. OP07DP is RoHS non-compliant and not recommended for new designs.

Q6: What does "Last Time Buy" status mean for OPA177GP?

A: Last Time Buy indicates Texas Instruments has discontinued production of OPA177GP. Current inventory (3933 pcs) represents the final available stock. Once depleted, the part will not be manufactured again. Designers must transition to active substitute parts such as OP177GPZ or OP177FPZ to ensure long-term supply continuity.

Q7: Can LT1001 series replace OPA177GP in precision DC applications?

A: LT1001ACN8#PBF and LT1001CN8#PBF are functionally compatible for DC precision applications. Both maintain 600 kHz gain bandwidth product (LT1001 achieves 800 kHz) and support 6V to 36V supply range. However, operating temperature range (0°C to 125°C) differs from OPA177GP (-40°C to 85°C). Use LT1001 only when application temperature requirements fall within 0°C to 125°C range.

Q8: What is the moisture sensitivity level (MSL) significance for through-hole components?

A: Through-hole components like OPA177GP (MSL: Not Applicable) and OP177GPZ (MSL: 1 - Unlimited) do not require moisture-sensitive device handling procedures. Surface-mount alternatives such as OPA177GS/2K5 (MSL: 3 - 168 Hours) require controlled storage and baking procedures before soldering. This is a manufacturing and assembly consideration, not an electrical compatibility factor.

Q9: Which substitute offers the best input offset voltage performance?

A: OP177FPZ and LT1007ACN8#PBF both offer 10 µV input offset voltage, compared to OPA177GP's 20 µV. OP177FPZ is the preferred choice for direct substitution due to matching slew rate (0.3 V/µs) and gain bandwidth product (600 kHz). LT1007ACN8#PBF's significantly higher bandwidth (8 MHz) makes it unsuitable for low-speed precision applications.

Q10: Is supply current specification critical for substitute selection?

A: Supply current specification is provided for OPA177GP (1.3 mA) and OPA177GS/2K5 (1.3 mA) but is not specified for most Analog Devices substitutes. For applications with strict power budget constraints, verify supply current with the substitute manufacturer's datasheet. OP177GPZ specifies 1.6 mA, representing a 23% increase. LT1360CN8#PBF specifies 4 mA, representing a 208% increase and making it unsuitable for low-power applications.

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