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OP747ARU Equivalent & Substitute Parts
Part Overview
The OP747ARU is a general-purpose operational amplifier manufactured by Analog Devices Inc., configured as a 4-circuit rail-to-rail amplifier in a 14-TSSOP surface mount package. This device is classified as obsolete, which necessitates identification of active equivalent and substitute components for ongoing design requirements and production continuity.
The OP747ARU operates across a wide supply voltage range of 2.7 V to 30 V with low input bias current and moderate slew rate characteristics suitable for general-purpose signal conditioning applications. Due to its obsolete status, alternative components with compatible electrical and mechanical specifications are required for new designs and component replenishment.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 4 | — |
| Output Type | Rail-to-Rail | — |
| Package / Case | 14-TSSOP (0.173", 4.40mm Width) | — |
| Mounting Type | Surface Mount | — |
| Slew Rate | 0.2 | V/µs |
| Gain Bandwidth Product | 700 | kHz |
| Current - Input Bias | 5 | nA |
| Voltage - Input Offset | 30 | µV |
| Current - Supply (x4 Channels) | 320 | µA |
| Current - Output / Channel | 30 | mA |
| Voltage - Supply Span (Min) | 2.7 | V |
| Voltage - Supply Span (Max) | 30 | V |
| Operating Temperature | -40 to 85 | °C |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the OP747ARU is determined by strict adherence to the following critical parameters:
Mandatory Compatibility Parameters:
- Package / Case: 14-TSSOP (0.173", 4.40mm Width)
- Mounting Type: Surface Mount
- Number of Circuits: 4
- Output Type: Rail-to-Rail
- Operating Temperature Range: Minimum -40°C, Maximum ≥85°C
Electrical Performance Parameters:
- Voltage - Supply Span (Min): ≤2.7 V
- Voltage - Supply Span (Max): ≥30 V
- Current - Output / Channel: ≥30 mA
- Slew Rate: ≥0.2 V/µs
- Gain Bandwidth Product: ≥700 kHz
Substitute parts are grouped into two categories:
Direct Equivalent: OP747ARUZ maintains identical electrical specifications and base product number (OP747) with active product status and improved packaging options.
Functional Equivalents: Texas Instruments OPA series amplifiers (OPA1644AIPW, OPA1654AIPW, OPA4140AIPW, OPA4141AIPW, OPA4180IPW) meet or exceed all mandatory compatibility and electrical performance parameters while offering enhanced performance characteristics in specific application domains (audio, J-FET input, zero-drift).
Parameter Comparison
| Parameter | OP747ARU | OP747ARUZ | OPA1644AIPW | OPA1654AIPW | OPA4140AIPW | OPA4180IPW |
|---|---|---|---|---|---|---|
| Manufacturer | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Status | Obsolete | Active | Active | Active | Active | Active |
| Amplifier Type | General Purpose | General Purpose | Audio | Audio | J-FET | Zero-Drift |
| Number of Circuits | 4 | 4 | 4 | 4 | 4 | 4 |
| Output Type | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail |
| Package / Case | 14-TSSOP | 14-TSSOP | 14-TSSOP | 14-TSSOP | 14-TSSOP | 14-TSSOP |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Slew Rate (V/µs) | 0.2 | 0.2 | 20 | 10 | 20 | 0.8 |
| Gain Bandwidth Product (kHz) | 700 | 700 | 11000 | 18000 | 11000 | 2000 |
| Current - Input Bias (pA/nA) | 5 nA | 5 nA | 2 pA | 10 pA | 0.5 pA | 250 pA |
| Voltage - Input Offset (µV) | 30 | 30 | 1000 | 500 | 30 | 15 |
| Current - Supply (µA x4 Channels) | 320 | 320 | 1800 | 2000 | 1800 | 450 |
| Current - Output / Channel (mA) | 30 | 30 | 36 | 50 | 36 | 18 |
| Voltage - Supply Span (Min - V) | 2.7 | 2.7 | 4.5 | 4.5 | 4.5 | 4.5 |
| Voltage - Supply Span (Max - V) | 30 | 30 | 36 | 36 | 36 | 36 |
| Operating Temperature (°C) | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 125 | -40 to 105 |
| Moisture Sensitivity Level (MSL) | 1 | 1 | 2 | 2 | 2 | 2 |
| RoHS Status | — | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
OP747ARUZ (Direct Equivalent)
OP747ARUZ is the primary substitute for OP747ARU. Both components share identical electrical specifications, base product number (OP747), and 14-TSSOP package configuration. OP747ARUZ maintains active product status with ROHS3 compliance and REACH unaffected certification. This component is available in tube packaging with significantly higher inventory levels (19,110 units) compared to the obsolete OP747ARU (2,300 units). Direct substitution is applicable for all applications currently utilizing OP747ARU without circuit modification.
OPA1644AIPW and OPA1644AIPWR (Audio Amplifier Equivalents)
OPA1644AIPW and OPA1644AIPWR are Texas Instruments audio amplifiers meeting all mandatory compatibility parameters. These components provide enhanced slew rate (20 V/µs versus 0.2 V/µs) and gain bandwidth product (11 MHz versus 700 kHz), with superior input bias current performance (2 pA versus 5 nA). Supply voltage minimum requirement increases to 4.5 V, restricting use in applications requiring 2.7 V minimum supply. ROHS3 compliance and REACH unaffected status are confirmed. Selection is appropriate for audio signal processing applications where enhanced bandwidth and slew rate provide performance benefits.
OPA1654AIPW and OPA1654AIPWR (High-Performance Audio Amplifier Equivalents)
OPA1654AIPW and OPA1654AIPWR offer the highest gain bandwidth product (18 MHz) and slew rate (10 V/µs) among substitute options, with maximum output current of 50 mA per channel. Input offset voltage is 500 µV. Supply voltage minimum is 4.5 V. ROHS3 compliance and REACH unaffected status are confirmed. Selection is appropriate for high-fidelity audio and precision signal conditioning applications where extended bandwidth is required.
OPA4140AIPW and OPA4140AIPWR (J-FET Input Amplifier Equivalents)
OPA4140AIPW and OPA4140AIPWR feature J-FET input stages with extremely low input bias current (0.5 pA) and extended operating temperature range (-40°C to 125°C). Slew rate is 20 V/µs with 11 MHz gain bandwidth product. Input offset voltage matches OP747ARU at 30 µV. Supply voltage minimum is 4.5 V. ROHS3 compliance and REACH unaffected status are confirmed. Selection is appropriate for high-impedance signal sources and applications requiring extended temperature operation.
OPA4141AIPW and OPA4141AIPWR (J-FET Input Amplifier Equivalents)
OPA4141AIPW and OPA4141AIPWR provide J-FET input configuration with 2 pA input bias current and 10 MHz gain bandwidth product. Slew rate is 20 V/µs. Operating temperature range extends to 125°C. Input offset voltage is 1 mV. Supply voltage minimum is 4.5 V. ROHS3 compliance and REACH unaffected status are confirmed. Selection is appropriate for high-impedance applications with extended temperature requirements.
OPA4180IPW (Zero-Drift Amplifier Equivalent)
OPA4180IPW is a zero-drift amplifier with exceptionally low input offset voltage (15 µV) and extended operating temperature range (-40°C to 105°C). Input bias current is 250 pA. Slew rate is 0.8 V/µs with 2 MHz gain bandwidth product. Supply voltage minimum is 4.5 V. Output current per channel is 18 mA. ROHS3 compliance and REACH unaffected status are confirmed. Selection is appropriate for precision DC measurement and low-frequency signal conditioning applications where offset voltage stability is critical.
Frequently Asked Questions (FAQ)
Q: Can OP747ARUZ be used as a direct replacement for OP747ARU in existing designs?
A: Yes. OP747ARUZ maintains identical electrical specifications and 14-TSSOP package configuration as OP747ARU. Both components share the same base product number (OP747). Direct substitution is applicable without circuit modification. OP747ARUZ is available in active product status with ROHS3 compliance.
Q: What is the primary difference between OP747ARUZ and the Texas Instruments OPA series substitutes?
A: OP747ARUZ is a direct equivalent with identical electrical performance. Texas Instruments OPA series components (OPA1644, OPA1654, OPA4140, OPA4141, OPA4180) are functional equivalents that meet or exceed mandatory compatibility parameters but offer enhanced performance characteristics in specific domains such as audio amplification, J-FET input stages, or zero-drift operation. OPA series components require minimum supply voltage of 4.5 V, whereas OP747ARUZ operates at 2.7 V minimum.
Q: Are all substitute parts available in the same packaging options as OP747ARU?
A: All substitute parts are available in 14-TSSOP surface mount package. Packaging format options vary by part number. OP747ARUZ is available in tube packaging. OPA1644AIPW and OPA1654AIPW are available in tube packaging. OPA1644AIPWR and OPA1654AIPWR are available in tape and reel format. OPA4140AIPW and OPA4141AIPW are available in tube packaging. OPA4140AIPWR and OPA4141AIPWR are available in cut tape and Digi-Reel format. OPA4180IPW is available in tube packaging.
Q: What are the key electrical parameters that determine substitution compatibility?
A: Mandatory compatibility parameters include 14-TSSOP package configuration, surface mount mounting type, 4-circuit configuration, rail-to-rail output type, and operating temperature range minimum of -40°C with maximum ≥85°C. Electrical performance parameters include supply voltage span minimum ≤2.7 V and maximum ≥30 V, output current ≥30 mA per channel, slew rate ≥0.2 V/µs, and gain bandwidth product ≥700 kHz.
Q: Which substitute part is recommended for applications requiring minimum supply voltage of 2.7 V?
A: OP747ARUZ is the only substitute that maintains the 2.7 V minimum supply voltage specification. All Texas Instruments OPA series equivalents require minimum supply voltage of 4.5 V. Applications requiring 2.7 V operation must use OP747ARUZ.
Q: What compliance certifications are provided for substitute parts?
A: OP747ARUZ and all Texas Instruments OPA series substitutes are ROHS3 compliant and REACH unaffected. OP747ARUZ has moisture sensitivity level (MSL) of 1 (unlimited). Texas Instruments OPA series components have MSL of 2 (1 year).
Q: Are there performance trade-offs when selecting OPA4180IPW as a substitute?
A: OPA4180IPW provides superior input offset voltage performance (15 µV versus 30 µV) and extended operating temperature range (-40°C to 105°C). However, output current per channel is reduced to 18 mA (versus 30 mA), slew rate is 0.8 V/µs (versus 0.2 V/µs), and gain bandwidth product is 2 MHz (versus 700 kHz). Supply voltage minimum is 4.5 V. Selection is appropriate for precision DC applications where offset voltage stability is prioritized over bandwidth and output current.
Q: Which substitute provides the highest slew rate and gain bandwidth product?
A: OPA1654AIPW and OPA1654AIPWR provide the highest slew rate (10 V/µs) and gain bandwidth product (18 MHz) among all substitutes. These components are suitable for high-fidelity audio and precision signal conditioning applications requiring extended bandwidth. Supply voltage minimum is 4.5 V.
Q: Can J-FET input amplifiers (OPA4140, OPA4141) be used in applications currently using OP747ARU?
A: J-FET input amplifiers can be used in applications where high input impedance and extremely low input bias current are beneficial. OPA4140AIPW and OPA4140AIPWR provide 0.5 pA input bias current with extended operating temperature range (-40°C to 125°C). OPA4141AIPW and OPA4141AIPWR provide 2 pA input bias current. Both maintain 30 µV input offset voltage matching OP747ARU. Supply voltage minimum is 4.5 V. Circuit compatibility must be verified for applications with specific impedance or temperature requirements.
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