OPA177FPG4 Equivalent & Substitute Parts

Part Overview

The OPA177FPG4 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 limited future availability. The OPA177FPG4 operates across a wide supply voltage range of 6V to 36V with an operating temperature range of -40°C to 85°C, making it suitable for precision analog signal conditioning applications. Due to its Last Time Buy status, identifying functionally equivalent substitute parts is necessary for design continuity and long-term component sourcing.

Key Parameters

Parameter	Value	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	10	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 of the OPA177FPG4 is determined by the following critical parameters:

Primary Substitution Criteria:

Amplifier Type: General Purpose
Number of Circuits: 1
Slew Rate: 0.3 V/µs (minimum acceptable)
Gain Bandwidth Product: 600 kHz (minimum acceptable)
Voltage Supply Range: 6V to 36V (minimum acceptable)
Operating Temperature Range: -40°C to 85°C (minimum acceptable)
Package Type: 8-DIP through-hole configuration

Substitution Logic: Parts are grouped into two categories based on packaging compatibility:

Category 1: Direct Pin-Compatible Substitutes (8-DIP Through-Hole) These parts maintain identical physical footprint and pinout, allowing direct board-level replacement without layout modification. All parts in this category meet or exceed the OPA177FPG4 electrical specifications.

Category 2: Functional Equivalent with Different Packaging (8-SOIC Surface Mount) The OPA177GS/2K5 provides electrical equivalence but requires different PCB layout and assembly process due to surface-mount packaging. This part is suitable only for new designs or boards with surface-mount capability.

Parts that do not meet the minimum supply voltage range, operating temperature range, or slew rate specifications are excluded from direct substitution.

Parameter Comparison

Parameter	OPA177FPG4	OPA177FP	OPA177GS/2K5	OP177FPZ	OP177GPZ	OP07CN8#PBF	OP97EN8#PBF
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Analog Devices	Analog Devices	Analog Devices	Analog Devices
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	1	1	1	1	1	1	1
Slew Rate (V/µs)	0.3	0.3	0.3	0.3	0.3	0.25	0.2
Gain Bandwidth Product (kHz)	600	600	600	600	600	600	900
Current - Input Bias (pA/nA)	500 pA	500 pA	500 pA	1.2 nA	1.2 nA	1.8 nA	30 pA
Voltage - Input Offset (µV)	10	10	20	10	20	60	10
Current - Supply (mA)	1.3	1.3	1.3	1.6	1.6	—	0.38
Voltage - Supply Span Min (V)	6	6	6	6	6	6	4
Voltage - Supply Span Max (V)	36	36	36	36	36	36	40
Operating Temperature (°C)	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	0 to 70	-40 to 85
Mounting Type	Through Hole	Through Hole	Surface Mount	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	8-DIP	8-DIP	8-SOIC	8-DIP	8-DIP	8-DIP	8-DIP
Product Status	Last Time Buy	Last Time Buy	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Tier 1: Direct Substitutes (Recommended for Existing Designs)

OPA177FP (Texas Instruments, 8-DIP Through-Hole)

Identical electrical specifications to OPA177FPG4
Same package footprint and pinout
Last Time Buy status; use for near-term production only
Suitable for direct board replacement without design modification

OP177GPZ (Analog Devices, 8-DIP Through-Hole)

Meets all electrical requirements with Active product status
Highest inventory availability (41,541 pcs)
Identical package and pinout to OPA177FPG4
Recommended for long-term design continuity

OP177FPZ (Analog Devices, 8-DIP Through-Hole)

Meets all electrical requirements with Active product status
Identical package and pinout to OPA177FPG4
Suitable for direct replacement

Tier 2: Functional Equivalents with Constraints

OP07CN8#PBF (Analog Devices, 8-DIP Through-Hole)

Meets electrical specifications except operating temperature range (0°C to 70°C vs. -40°C to 85°C)
Use only in applications where operating temperature does not exceed 70°C
Identical package and pinout

OP97EN8#PBF (Analog Devices, 8-DIP Through-Hole)

Slew rate of 0.2 V/µs is below OPA177FPG4 specification (0.3 V/µs)
Use only in applications where slew rate requirement is less stringent
Offers superior input bias current (30 pA) and lower supply current (380 µA)
Identical package and pinout

Tier 3: Alternative Packaging

OPA177GS/2K5 (Texas Instruments, 8-SOIC Surface Mount)

Electrically equivalent with Active product status
Requires PCB redesign and surface-mount assembly capability
Suitable only for new designs or boards with surface-mount infrastructure

Parts Not Recommended for Direct Substitution

LT1360CN8#PBF (Analog Devices)

Voltage Feedback amplifier type, not General Purpose
Significantly different electrical characteristics (50 MHz bandwidth vs. 600 kHz)
Higher supply current and input offset voltage
Not suitable for OPA177FPG4 replacement

Frequently Asked Questions (FAQ)

Q1: Can I use OP177GPZ as a direct replacement for OPA177FPG4 on my existing PCB?

A: Yes. OP177GPZ is pin-compatible with OPA177FPG4 in 8-DIP through-hole packaging. Both devices have identical pinout and footprint. OP177GPZ meets or exceeds all electrical specifications of OPA177FPG4 and carries Active product status, making it suitable for direct board-level replacement without design modification.

Q2: What is the difference between OPA177FP and OP177GPZ?

A: Both are electrically equivalent to OPA177FPG4 with identical 8-DIP packaging. The primary difference is manufacturer: OPA177FP is from Texas Instruments (Last Time Buy status), while OP177GPZ is from Analog Devices (Active status). OP177GPZ has significantly higher inventory availability (41,541 pcs vs. 2,300 pcs) and Active product status, making it the preferred choice for long-term designs.

Q3: Why is OP07CN8#PBF not recommended as a substitute?

A: OP07CN8#PBF has an operating temperature range of 0°C to 70°C, which is narrower than the OPA177FPG4 specification of -40°C to 85°C. This part is suitable only for applications that do not require operation below 0°C or above 70°C. If your application requires the full -40°C to 85°C temperature range, OP07CN8#PBF is not appropriate.

Q4: Can I use OP97EN8#PBF instead of OPA177FPG4?

A: OP97EN8#PBF has a slew rate of 0.2 V/µs, which is lower than the OPA177FPG4 specification of 0.3 V/µs. Use OP97EN8#PBF only if your application does not require the higher slew rate. OP97EN8#PBF offers advantages in input bias current (30 pA) and supply current (380 µA), making it suitable for low-power, low-bias-current applications where slew rate is not critical.

Q5: What is the difference between 8-DIP and 8-SOIC packaging?

A: 8-DIP (Dual In-line Package) is through-hole technology with leads inserted into PCB holes. 8-SOIC (Small Outline Integrated Circuit) is surface-mount technology with leads soldered directly to PCB pads. These packages are not mechanically compatible. OPA177GS/2K5 in 8-SOIC requires PCB redesign and surface-mount assembly capability. Use 8-SOIC only for new designs with surface-mount infrastructure.

Q6: Which substitute part should I choose for a new design?

A: For new designs, select OP177GPZ (Analog Devices, 8-DIP). This part has Active product status, highest inventory availability, and meets all electrical specifications. It ensures long-term component availability and design continuity. If surface-mount technology is available, OPA177GS/2K5 is an alternative with Active status.

Q7: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this document carry ROHS3 Compliant certification, matching the compliance status of OPA177FPG4. All parts are also REACH Unaffected and classified as EAR99 for export control purposes.

Q8: What does "Last Time Buy" status mean for OPA177FPG4?

A: Last Time Buy indicates that the manufacturer will discontinue this part after current inventory is depleted. No new production runs are planned. For designs currently using OPA177FPG4, transition to an Active-status substitute part (such as OP177GPZ) to ensure long-term component availability and avoid future supply disruptions.

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