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AD817AR Equivalent & Substitute Parts
Part Overview
The AD817AR 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, which necessitates identification of equivalent and substitute components for ongoing design support and procurement. The AD817AR delivers a 50 MHz gain-bandwidth product with a 350 V/µs slew rate, suitable for general-purpose amplification applications across industrial and commercial systems. Due to its obsolete status, active alternatives with compatible electrical and mechanical specifications are required for new designs and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 1 | — |
| Slew Rate | 350 | V/µs |
| Gain Bandwidth Product | 50 | MHz |
| -3dB Bandwidth | 50 | MHz |
| Current - Input Bias | 3.3 | µA |
| Voltage - Input Offset | 500 | µV |
| Current - Supply | 7 | mA |
| Current - Output / Channel | 50 | mA |
| Voltage - Supply Span (Min) | 5 | 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 | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the AD817AR is determined by strict alignment of electrical and mechanical parameters. The primary substitution criteria are:
Critical Matching Parameters:
- Package / Case: 8-SOIC (0.154", 3.90mm Width)
- Mounting Type: Surface Mount
- Number of Circuits: 1
- Amplifier Type: General Purpose
- Gain Bandwidth Product: 50 MHz (primary electrical specification)
- Slew Rate: 350 V/µs (performance specification)
- Voltage - Supply Span: 5 V to 36 V (power supply compatibility)
- Current - Output / Channel: 50 mA (load-driving capability)
Substitution Categories:
Direct Equivalent: AD817ARZ is the active production variant of the AD817 base product, maintaining identical electrical specifications and package configuration. This part differs only in product status (Active vs. Obsolete) and packaging format (Tube vs. unspecified).
Functional Equivalents with Parameter Variations: LT1220CS8, LT1220CS8#PBF, and LT1220CS8#TRPBF maintain the 8-SOIC package and general-purpose amplifier classification but exhibit reduced slew rate (250 V/µs vs. 350 V/µs), lower gain-bandwidth product (45 MHz vs. 50 MHz), and narrower supply voltage range (10 V to 30 V vs. 5 V to 36 V). These parts are suitable only where the reduced performance specifications are acceptable.
Enhanced Performance Alternatives: LT1224CS8#PBF and LT1224CS8#TRPBF provide higher slew rate (400 V/µs) and maintain 50 MHz gain-bandwidth product, though with reduced maximum supply voltage (30 V vs. 36 V). LT1360CS8#PBF and LT1360CS8#TRPBF offer significantly higher slew rate (800 V/µs) and maintain 50 MHz gain-bandwidth product with 5 V to 30 V supply range. LT1363CS8#TR provides the highest performance with 1000 V/µs slew rate and 70 MHz gain-bandwidth product, compatible with 5 V to 36 V supply range.
Alternative Manufacturer: TLE2037CDR (Texas Instruments) maintains identical 50 MHz gain-bandwidth product and 8-SOIC package with superior input bias current (15 nA vs. 3.3 µA) and input offset voltage (20 µV vs. 500 µV), though with significantly reduced slew rate (7.5 V/µs).
Parameter Comparison
| Part Number | Manufacturer | Product Status | Slew Rate (V/µs) | GBW (MHz) | Input Bias (µA) | Supply Min (V) | Supply Max (V) | Output Current (mA) | Operating Temp (°C) | Package |
|---|---|---|---|---|---|---|---|---|---|---|
| AD817AR | Analog Devices | Obsolete | 350 | 50 | 3.3 | 5 | 36 | 50 | -40 to 85 | 8-SOIC |
| AD817ARZ | Analog Devices | Active | 350 | 50 | 3.3 | 5 | 36 | 50 | -45 to 85 | 8-SOIC |
| LT1220CS8 | Linear Technology | Obsolete | 250 | 45 | 0.1 | 10 | 30 | 26 | 0 to 70 | 8-SOIC |
| LT1220CS8#PBF | Analog Devices | Active | 250 | 45 | 0.1 | 10 | 30 | 26 | 0 to 70 | 8-SOIC |
| LT1220CS8#TRPBF | Analog Devices | Active | 250 | 45 | 0.1 | 10 | 30 | 26 | 0 to 70 | 8-SOIC |
| LT1224CS8#PBF | Analog Devices | Active | 400 | 45 | 4 | 5 | 30 | — | 0 to 70 | 8-SOIC |
| LT1224CS8#TRPBF | Analog Devices | Active | 400 | 45 | 4 | 5 | 30 | — | 0 to 70 | 8-SOIC |
| LT1360CS8#PBF | Analog Devices | Active | 800 | 50 | 0.3 | 5 | 30 | 34 | 0 to 70 | 8-SOIC |
| LT1360CS8#TRPBF | Analog Devices | Active | 800 | 50 | 0.3 | 5 | 30 | 34 | 0 to 70 | 8-SOIC |
| LT1363CS8#TR | Analog Devices | Active | 1000 | 70 | 0.6 | 5 | 36 | 60 | 0 to 70 | 8-SOIC |
| TLE2037CDR | Texas Instruments | Active | 7.5 | 50 | 0.015 | 8 | 38 | 50 | 0 to 70 | 8-SOIC |
Engineering Selection Recommendations
Direct Replacement (Recommended for Immediate Substitution):
AD817ARZ is the primary substitute for AD817AR. This part maintains identical electrical specifications (350 V/µs slew rate, 50 MHz gain-bandwidth product, 5 V to 36 V supply range, 50 mA output current) and identical 8-SOIC package configuration. AD817ARZ holds Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment. The extended operating temperature range (-45°C to 85°C vs. -40°C to 85°C) provides additional margin for industrial applications. This substitution requires no circuit redesign or performance verification.
Active Alternatives with Reduced Performance:
LT1220CS8#PBF and LT1220CS8#TRPBF (Analog Devices, Active status, ROHS3 compliant) are suitable where reduced slew rate (250 V/µs) and gain-bandwidth product (45 MHz) are acceptable. These parts require supply voltage minimum of 10 V, restricting use in 5 V systems. Output current capability is reduced to 26 mA. Operating temperature range is limited to 0°C to 70°C. Selection of these parts requires circuit analysis to confirm performance adequacy.
Enhanced Performance Alternatives:
LT1224CS8#PBF and LT1224CS8#TRPBF (Analog Devices, Active status, ROHS3 compliant) provide higher slew rate (400 V/µs) than AD817AR while maintaining 45 MHz gain-bandwidth product. Supply voltage range is 5 V to 30 V, limiting maximum supply to 30 V. Operating temperature is 0°C to 70°C. These parts are suitable for applications requiring faster slew rate within the reduced supply voltage constraint.
LT1360CS8#PBF and LT1360CS8#TRPBF (Analog Devices, Active status, ROHS3 compliant) maintain 50 MHz gain-bandwidth product with significantly higher slew rate (800 V/µs). Supply voltage range is 5 V to 30 V. Output current is 34 mA. Operating temperature is 0°C to 70°C. These parts are suitable for high-speed applications where maximum supply voltage of 30 V is acceptable.
LT1363CS8#TR (Analog Devices, Active status, ROHS3 compliant) provides the highest performance with 1000 V/µs slew rate and 70 MHz gain-bandwidth product. Supply voltage range is 5 V to 36 V, matching AD817AR. Output current is 60 mA. Operating temperature is 0°C to 70°C. This part is suitable for applications requiring enhanced performance within the original supply voltage specification, though operating temperature range is reduced.
Alternative Manufacturer Option:
TLE2037CDR (Texas Instruments, Active status, ROHS3 compliant) maintains 50 MHz gain-bandwidth product and 8-SOIC package with superior input characteristics (15 nA input bias current, 20 µV input offset voltage). However, slew rate is significantly reduced to 7.5 V/µs, making this part unsuitable for applications requiring the original 350 V/µs performance. Supply voltage range is 8 V to 38 V. This part is suitable only for low-speed, precision applications where input offset voltage and bias current are critical parameters.
Frequently Asked Questions (FAQ)
Q: Can AD817ARZ be used as a direct replacement for AD817AR without circuit modification?
A: Yes. AD817ARZ maintains identical electrical specifications (350 V/µs slew rate, 50 MHz gain-bandwidth product, 5 V to 36 V supply range, 50 mA output current) and identical 8-SOIC package. The only differences are product status (Active vs. Obsolete) and packaging format (Tube). No circuit redesign is required.
Q: What is the primary limitation of LT1220CS8 variants as substitutes?
A: LT1220CS8 variants have reduced slew rate (250 V/µs vs. 350 V/µs), lower gain-bandwidth product (45 MHz vs. 50 MHz), and narrower supply voltage range (10 V to 30 V vs. 5 V to 36 V). These parts are unsuitable for 5 V systems and applications requiring the original performance specifications. Operating temperature is also limited to 0°C to 70°C.
Q: Are LT1224CS8 and LT1360CS8 suitable for all AD817AR applications?
A: No. While LT1224CS8 and LT1360CS8 provide higher slew rates (400 V/µs and 800 V/µs respectively), both are limited to 30 V maximum supply voltage, compared to AD817AR's 36 V maximum. Applications requiring operation at supply voltages above 30 V cannot use these parts. Operating temperature range is also reduced to 0°C to 70°C.
Q: Why is TLE2037CDR not recommended as a primary substitute despite maintaining 50 MHz gain-bandwidth product?
A: TLE2037CDR has severely reduced slew rate (7.5 V/µs vs. 350 V/µs), making it unsuitable for applications requiring the original dynamic performance. While input characteristics are superior (15 nA bias current, 20 µV offset voltage), this part is only suitable for low-speed, precision applications. Operating temperature is limited to 0°C to 70°C.
Q: What is the significance of LT1363CS8#TR having 70 MHz gain-bandwidth product?
A: LT1363CS8#TR provides enhanced bandwidth (70 MHz vs. 50 MHz) and higher slew rate (1000 V/µs vs. 350 V/µs), enabling use in higher-frequency applications. However, this part maintains the original 5 V to 36 V supply voltage range and 8-SOIC package. The trade-off is reduced operating temperature range (0°C to 70°C vs. -40°C to 85°C).
Q: Are all substitute parts available in the same packaging options as AD817AR?
A: All substitute parts are available in 8-SOIC surface-mount package, matching AD817AR's mechanical specification. However, packaging formats (Tube, Tape & Reel, Cut Tape) vary by part number. Verify specific packaging availability with your supplier for procurement requirements.
Q: What compliance certifications should be verified when selecting a substitute?
A: All recommended active substitutes (AD817ARZ, LT1220CS8#PBF, LT1220CS8#TRPBF, LT1224CS8#PBF, LT1224CS8#TRPBF, LT1360CS8#PBF, LT1360CS8#TRPBF, LT1363CS8#TR, TLE2037CDR) are ROHS3 compliant and REACH unaffected. Verify compliance status with your specific application requirements and regional regulations.
Q: Can LT1220CS8 variants be used in designs originally specified for 5 V supply operation?
A: No. LT1220CS8 variants require minimum 10 V supply voltage. These parts cannot operate at 5 V and are unsuitable for designs specified with 5 V single-supply operation. AD817ARZ, LT1224CS8 variants, LT1360CS8 variants, or LT1363CS8#TR must be selected for 5 V compatibility.
Q: What is the impact of reduced operating temperature range on substitute part selection?
A: Most substitute parts (LT1220CS8, LT1224CS8, LT1360CS8, LT1363CS8, TLE2037CDR) are limited to 0°C to 70°C operating temperature, compared to AD817AR's -40°C to 85°C. Applications requiring operation below 0°C or above 70°C must use AD817ARZ, which extends the lower limit to -45°C. Verify operating temperature requirements before part selection.
Q: Is input bias current a critical parameter for substitute selection?
A: Input bias current varies significantly among substitutes (0.015 µA for TLE2037CDR to 4 µA for LT1224CS8 variants vs. 3.3 µA for AD817AR). For applications with high-impedance input sources, lower bias current reduces input offset errors. For standard applications, this parameter is not critical. Verify input impedance requirements in your circuit design.
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