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OP177GS Equivalent & Substitute Parts
Part Overview
The OP177GS is a general-purpose operational amplifier manufactured by Analog Devices Inc., housed in an 8-SOIC surface-mount package. This device is classified as obsolete, indicating that direct procurement of the OP177GS may face supply constraints. The OP177GS delivers a 600 kHz gain-bandwidth product with a slew rate of 0.3 V/µs, making it suitable for general-purpose amplification applications requiring moderate bandwidth and low input bias current specifications. Identification of equivalent and substitute parts is necessary to ensure design continuity and maintain component availability for production and maintenance applications.
Substiute Parts
Key Parameters
| Parameter | OP177GS Value | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 1 | — |
| Slew Rate | 0.3 | V/µs |
| Gain Bandwidth Product | 600 | kHz |
| Current - Input Bias | 1.2 | nA |
| Voltage - Input Offset | 20 | µV |
| Current - Supply | 1.6 | mA |
| Voltage - Supply Span (Min) | 6 | V |
| Voltage - Supply Span (Max) | 36 | V |
| Operating Temperature | -40 to 85 | °C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| Product Status | Obsolete | — |
Substitute Part Grouping Explanation
Substitution of the OP177GS is determined by electrical and mechanical compatibility across the following critical parameters:
Electrical Compatibility Criteria:
- Slew Rate: 0.3 V/µs (exact match required for timing-sensitive applications)
- Gain Bandwidth Product: 600 kHz (exact match required for frequency response)
- Voltage Supply Range: 6 V to 36 V (must encompass or match the original specification)
- Operating Temperature Range: Must support -40°C to 85°C minimum
- Input Bias Current: 1.2 nA nominal (lower values acceptable; higher values require application review)
- Input Offset Voltage: 20 µV nominal (lower values acceptable; higher values require application review)
Mechanical Compatibility Criteria:
- Package Type: 8-SOIC surface-mount package with 0.154" (3.90mm) width
- Mounting Type: Surface Mount
- Number of Circuits: 1 (single amplifier per package)
Substitute parts are classified into two categories:
Direct Substitutes: Parts meeting all electrical and mechanical parameters with identical or superior performance characteristics and active product status.
Similar Substitutes: Parts meeting core electrical parameters but with variations in supply current, input bias current, input offset voltage, or operating temperature range. These require application-level verification of compatibility.
Parameter Comparison
| Parameter | OP177GS | OP177GSZ | OPA177GS | OPA177GS/2K5 | OP07CDR | OP07DD |
|---|---|---|---|---|---|---|
| Manufacturer | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Status | Obsolete | Active | Active | Active | Active | Active |
| Slew Rate (V/µs) | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
| Gain Bandwidth Product (kHz) | 600 | 600 | 600 | 600 | 600 | 600 |
| Current - Input Bias (nA) | 1.2 | 1.2 | 0.5 | 0.5 | 1.8 | 2.0 |
| Voltage - Input Offset (µV) | 20 | 20 | 20 | 20 | 60 | 60 |
| Current - Supply (mA) | 1.6 | 1.6 | 1.3 | 1.3 | — | — |
| Voltage - Supply Span Min (V) | 6 | 6 | 6 | 6 | 6 | 6 |
| Voltage - Supply Span Max (V) | 36 | 36 | 36 | 36 | 36 | 36 |
| Operating Temperature (°C) | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | 0 to 70 | 0 to 70 |
| Package / Case | 8-SOIC (3.90mm) | 8-SOIC (3.90mm) | 8-SOIC (3.90mm) | 8-SOIC (3.90mm) | 8-SOIC (3.90mm) | 8-SOIC (3.90mm) |
| RoHS Status | — | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) | 3 (168 Hours) | 3 (168 Hours) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
Primary Substitute: OP177GSZ
The OP177GSZ is the recommended direct substitute for the OP177GS. Both devices are manufactured by Analog Devices Inc. and share identical electrical specifications across all critical parameters: 0.3 V/µs slew rate, 600 kHz gain-bandwidth product, 1.2 nA input bias current, 20 µV input offset voltage, and 1.6 mA supply current. The OP177GSZ maintains the same -40°C to 85°C operating temperature range and 8-SOIC (3.90mm) package configuration. The OP177GSZ carries Active product status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), ensuring long-term availability and regulatory compliance. Inventory availability of 17,423 units supports production requirements.
Secondary Substitutes: OPA177GS and OPA177GS/2K5
The OPA177GS and OPA177GS/2K5, both manufactured by Texas Instruments, provide functional equivalence with minor electrical variations. These devices maintain the 0.3 V/µs slew rate, 600 kHz gain-bandwidth product, 20 µV input offset voltage, and full 6 V to 36 V supply range. The input bias current is reduced to 0.5 nA (lower than the OP177GS specification of 1.2 nA), and supply current is reduced to 1.3 mA (lower than 1.6 mA). Both maintain the -40°C to 85°C operating temperature range and 8-SOIC (3.90mm) package. Both carry Active product status with ROHS3 compliance. The OPA177GS is supplied in Tube packaging with 30,100 units in stock; the OPA177GS/2K5 is supplied in Cut Tape & Digi-Reel packaging with 10,200 units in stock. The reduced input bias current and supply current represent performance improvements suitable for applications where lower power consumption or reduced input current is beneficial.
Tertiary Substitutes: OP07CDR and OP07DD
The OP07CDR and OP07DD, manufactured by Texas Instruments, provide electrical compatibility with the OP177GS across core parameters: 0.3 V/µs slew rate, 600 kHz gain-bandwidth product, and 6 V to 36 V supply range. Both devices are housed in 8-SOIC (3.90mm) packages. However, these devices operate over a reduced temperature range of 0°C to 70°C, which does not encompass the OP177GS specification of -40°C to 85°C. The OP07CDR and OP07DD exhibit higher input offset voltage (60 µV versus 20 µV) and higher input bias current (1.8 nA and 2.0 nA respectively, versus 1.2 nA). The OP07CDR carries Active product status with 220,100 units in stock and Cut Tape & Digi-Reel packaging. The OP07DD carries Active product status with 1,121 units in stock and Tube packaging. These substitutes are suitable only for applications operating within the 0°C to 70°C temperature range and tolerant of the higher input offset voltage and bias current specifications.
Frequently Asked Questions (FAQ)
Q: Can the OP177GSZ be used as a direct replacement for the OP177GS?
A: Yes. The OP177GSZ is a direct substitute for the OP177GS. Both devices are manufactured by Analog Devices Inc. and share identical electrical specifications: 0.3 V/µs slew rate, 600 kHz gain-bandwidth product, 1.2 nA input bias current, 20 µV input offset voltage, 1.6 mA supply current, -40°C to 85°C operating temperature, and 8-SOIC (3.90mm) package. The OP177GSZ carries Active product status, ensuring continued availability.
Q: What are the key differences between the OP177GS and the OPA177GS?
A: The OP177GS and OPA177GS share identical slew rate (0.3 V/µs), gain-bandwidth product (600 kHz), input offset voltage (20 µV), supply voltage range (6 V to 36 V), operating temperature range (-40°C to 85°C), and package type (8-SOIC, 3.90mm). The OPA177GS exhibits lower input bias current (0.5 nA versus 1.2 nA) and lower supply current (1.3 mA versus 1.6 mA). The OPA177GS is manufactured by Texas Instruments and carries Active product status. These differences represent performance improvements and do not preclude substitution in applications designed for the OP177GS.
Q: Can the OP07CDR be used in applications requiring the full -40°C to 85°C temperature range?
A: No. The OP07CDR operates over a temperature range of 0°C to 70°C, which does not encompass the OP177GS specification of -40°C to 85°C. The OP07CDR is suitable only for applications operating within the 0°C to 70°C range. For applications requiring the full -40°C to 85°C temperature range, use the OP177GSZ, OPA177GS, or OPA177GS/2K5.
Q: What is the significance of the input bias current difference between the OP177GS (1.2 nA) and the OPA177GS (0.5 nA)?
A: The input bias current represents the DC current flowing into the amplifier input terminals. The OPA177GS exhibits a lower input bias current (0.5 nA) compared to the OP177GS (1.2 nA). In applications where input bias current contributes to offset errors or where high-impedance input sources are used, the lower input bias current of the OPA177GS provides improved performance. In applications where input bias current is not a limiting factor, both devices are functionally equivalent.
Q: Are the OP177GSZ and OPA177GS/2K5 suitable for high-temperature applications?
A: Yes. Both the OP177GSZ and OPA177GS/2K5 operate over the -40°C to 85°C temperature range, matching the OP177GS specification. Both devices are suitable for applications requiring operation across this full temperature range. The OP07CDR and OP07DD, by contrast, operate only over 0°C to 70°C and are not suitable for high-temperature applications exceeding 70°C.
Q: What packaging options are available for substitute parts?
A: The OP177GSZ is supplied in Tube packaging. The OPA177GS is supplied in Tube packaging. The OPA177GS/2K5 is supplied in Cut Tape & Digi-Reel packaging. The OP07CDR is supplied in Cut Tape & Digi-Reel packaging. The OP07DD is supplied in Tube packaging. All devices are housed in 8-SOIC (0.154", 3.90mm width) surface-mount packages. Selection of packaging type depends on production requirements and handling procedures.
Q: Is the OP177GSZ RoHS compliant?
A: Yes. The OP177GSZ carries ROHS3 compliance certification, meeting regulatory requirements for hazardous substance restrictions. The OP177GS does not specify RoHS status. For applications requiring RoHS compliance, the OP177GSZ, OPA177GS, OPA177GS/2K5, OP07CDR, and OP07DD all carry ROHS3 compliance.
Q: What is the moisture sensitivity level (MSL) of the substitute parts?
A: The OP177GSZ, OP07CDR, and OP07DD carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. The OPA177GS and OPA177GS/2K5 carry MSL 3 (168 Hours), indicating that these devices must be stored in controlled humidity environments and used within 168 hours of package opening. For applications with extended storage or high-humidity environments, the OP177GSZ, OP07CDR, or OP07DD are preferred.
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