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AD795JR Equivalent & Substitute Parts
Part Overview
The AD795JR is a J-FET input operational amplifier manufactured by Analog Devices Inc., housed in an 8-SOIC surface mount package. This device is classified as obsolete, though 3685 units remain in stock as new original inventory. The AD795JR serves applications requiring low input bias current and low input offset voltage characteristics typical of J-FET amplifier designs. Due to its obsolete status, identification of equivalent and substitute parts is necessary for ongoing design support, production continuity, and long-term component availability planning.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | J-FET | — |
| Number of Circuits | 1 | — |
| Slew Rate | 1 | V/µs |
| -3dB Bandwidth | 1.6 | MHz |
| Current - Input Bias | 1 | pA |
| Voltage - Input Offset | 100 | µV |
| Current - Supply | 1.3 | mA |
| Current - Output / Channel | 10 | mA |
| Voltage - Supply Span (Min) | 8 | V |
| Voltage - Supply Span (Max) | 36 | V |
| Operating Temperature | 0 to 70 | °C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the AD795JR is determined by strict alignment of electrical and mechanical parameters within the linear amplifier category. The primary substitution criteria are:
Critical Parameters for Substitution:
- Amplifier Type (J-FET input architecture)
- Number of Circuits (single circuit configuration)
- Package / Case (8-SOIC form factor with 0.154" width, 3.90mm)
- Mounting Type (Surface Mount)
- Supply voltage compatibility (minimum 8V, maximum 36V)
- Operating temperature range (minimum 0°C, maximum 70°C)
Secondary Electrical Parameters:
- Input bias current (1 pA specification)
- Input offset voltage (100 µV specification)
- Slew rate (1 V/µs specification)
- Bandwidth (-3dB at 1.6 MHz)
Substitute parts are grouped into two categories: direct equivalents that maintain identical electrical specifications and packaging, and similar parts that share the same package form factor and general amplifier classification but may exhibit different electrical performance characteristics.
Parameter Comparison
| Part Number | Manufacturer | Amplifier Type | Slew Rate (V/µs) | Bandwidth (MHz) | Input Bias (pA) | Input Offset (µV) | Supply Current (mA) | Output Current (mA) | Supply Min (V) | Supply Max (V) | Temp Range (°C) | Package | Status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AD795JR | Analog Devices Inc. | J-FET | 1 | 1.6 | 1 | 100 | 1.3 | 10 | 8 | 36 | 0 to 70 | 8-SOIC | Obsolete |
| AD795JRZ | Analog Devices Inc. | J-FET | 1 | 1.6 | 1 | 100 | 1.3 | 10 | 8 | 36 | 0 to 70 | 8-SOIC | Active |
| OPA131U | Texas Instruments | General Purpose | 10 | 4 | 5 | 200 | 1.5 | 25 | 9 | 36 | -40 to 85 | 8-SOIC | Active |
| OPA131UA | Texas Instruments | General Purpose | 10 | 4 | 5 | 200 | 1.5 | 25 | 9 | 36 | -40 to 85 | 8-SOIC | Active |
| OPA131UA/2K5 | Texas Instruments | General Purpose | 10 | 4 | 5 | 200 | 1.5 | 25 | 9 | 36 | -40 to 85 | 8-SOIC | Active |
| OPA131UJ | Burr Brown | J-FET | 10 | 4 | 5 | 200 | 1.5 | 25 | 9 | 36 | -40 to 85 | 8-SOIC | Active |
| OPA131UJ/2K5 | Texas Instruments | J-FET | 10 | 4 | 5 | 200 | 1.5 | 25 | 9 | 36 | -40 to 85 | 8-SOIC | Active |
| OPA237UA | Texas Instruments | General Purpose | 0.5 | 1.5 | 8.5 nA | 350 | 0.2 | 8 | 2.7 | 36 | -40 to 85 | 8-SOIC | Active |
| OPA237UA/2K5 | Texas Instruments | General Purpose | 0.5 | 1.5 | 8.5 nA | 350 | 0.2 | 8 | 2.7 | 36 | -40 to 85 | 8-SOIC | Active |
| THS4601IDDA | Texas Instruments | General Purpose | 100 | 440 | 30 | 1000 | 10 | 80 | 10 | 30 | -40 to 85 | 8-PowerSOIC | Active |
| TLE2021CD | Texas Instruments | General Purpose | 0.65 | 2 | 25 nA | 150 | 0.24 | 20 | 4 | 40 | 0 to 70 | 8-SOIC | Last Time Buy |
Engineering Selection Recommendations
Direct Equivalent:
The AD795JRZ is the direct equivalent to the AD795JR. Both devices are manufactured by Analog Devices Inc. and share identical electrical specifications, including J-FET amplifier type, 1 V/µs slew rate, 1.6 MHz bandwidth, 1 pA input bias current, and 100 µV input offset voltage. The AD795JRZ is currently in active product status with 8959 units in stock, compared to the obsolete AD795JR. The AD795JRZ is packaged in tube format and carries ROHS3 compliance certification. This part is the recommended direct replacement for the AD795JR.
J-FET Amplifier Alternatives:
The OPA131UJ and OPA131UJ/2K5 are J-FET input amplifiers from Texas Instruments and Burr Brown that maintain the same 8-SOIC package form factor. These devices operate across an extended temperature range of -40°C to 85°C and feature higher slew rate (10 V/µs) and bandwidth (4 MHz) compared to the AD795JR. Both parts are in active product status. The OPA131UJ/2K5 is supplied in tape and reel packaging with 5551 units available.
General Purpose Amplifier Alternatives:
The OPA131U and OPA131UA series from Texas Instruments are general purpose amplifiers in 8-SOIC packages with active product status. These devices provide higher output current capability (25 mA versus 10 mA) and extended operating temperature range (-40°C to 85°C). The OPA237UA and OPA237UA/2K5 are low-power alternatives with reduced supply current (200 µA versus 1.3 mA) and extended lower supply voltage limit (2.7 V minimum). The TLE2021CD from Texas Instruments is in last time buy status and operates across the same temperature range as the AD795JR (0°C to 70°C).
High-Performance Alternative:
The THS4601IDDA is a high-speed general purpose amplifier with significantly enhanced performance characteristics, including 100 V/µs slew rate and 440 MHz bandwidth. This device is housed in an 8-PowerSOIC package and is suitable for applications requiring substantially higher bandwidth and slew rate performance than the AD795JR.
Frequently Asked Questions (FAQ)
Q: Can the AD795JRZ be used as a direct replacement for the AD795JR?
A: Yes. The AD795JRZ is electrically and mechanically identical to the AD795JR. Both devices feature J-FET input architecture, 1 V/µs slew rate, 1.6 MHz bandwidth, 1 pA input bias current, and 100 µV input offset voltage. The AD795JRZ is in active product status and is the recommended direct replacement.
Q: What is the primary difference between the AD795JR and the OPA131UJ?
A: Both are J-FET input amplifiers in 8-SOIC packages. The OPA131UJ provides higher slew rate (10 V/µs versus 1 V/µs), higher bandwidth (4 MHz versus 1.6 MHz), and extended operating temperature range (-40°C to 85°C versus 0°C to 70°C). The OPA131UJ is suitable for applications requiring faster signal response and wider temperature operation.
Q: Are the OPA131U and OPA131UA interchangeable?
A: Yes. The OPA131U and OPA131UA are functionally equivalent general purpose amplifiers with identical electrical specifications. Both are supplied in 8-SOIC packages and are in active product status. The OPA131UA/2K5 variant is supplied in tape and reel packaging.
Q: What packaging options are available for substitute parts?
A: Substitute parts are available in multiple packaging formats: tube packaging (standard for OPA131U, OPA131UA, OPA237UA, THS4601IDDA, TLE2021CD), tape and reel (OPA131UA/2K5, OPA237UA/2K5, OPA131UJ/2K5), and bulk (OPA131UJ). The AD795JRZ is supplied in tube format.
Q: Can the OPA237UA be used in place of the AD795JR?
A: The OPA237UA shares the same 8-SOIC package form factor and operates across an overlapping supply voltage range (2.7 V to 36 V). However, the OPA237UA features significantly lower supply current (200 µA versus 1.3 mA) and lower slew rate (0.5 V/µs versus 1 V/µs). Substitution is application-dependent and requires verification of bandwidth and slew rate requirements.
Q: What is the significance of the MSL rating on these parts?
A: Moisture Sensitivity Level (MSL) indicates the component's sensitivity to moisture absorption during storage and handling. The AD795JR and AD795JRZ carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Most substitute parts carry MSL 1 or MSL 3 (168 Hours), which specifies moisture exposure limits during assembly processes.
Q: Is the THS4601IDDA suitable as a substitute for the AD795JR?
A: The THS4601IDDA is a high-performance amplifier with substantially different electrical characteristics. It features 100 V/µs slew rate, 440 MHz bandwidth, and 80 mA output current capability, compared to the AD795JR's 1 V/µs, 1.6 MHz, and 10 mA specifications. The THS4601IDDA is housed in an 8-PowerSOIC package rather than standard 8-SOIC. Substitution is suitable only for applications requiring significantly higher performance.
Q: What compliance certifications should be considered when selecting a substitute?
A: The AD795JR carries ROHS3 compliance and REACH unaffected status. Most active substitute parts (AD795JRZ, OPA131 series, OPA237 series, THS4601IDDA, TLE2021CD) are ROHS3 compliant and REACH unaffected. The TLE2021CD is in last time buy status, indicating discontinued production. Compliance certifications should be verified against specific application and regulatory requirements.
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