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AD8091ARTZ-R2 Equivalent & Substitute Parts
Part Overview
The AD8091ARTZ-R2 is a voltage feedback operational amplifier manufactured by Analog Devices Inc., designed for single-circuit rail-to-rail applications in the SOT-23-5 package. This component features a slew rate of 170V/µs and -3dB bandwidth of 110 MHz, suitable for high-speed signal conditioning and amplification tasks.
The AD8091ARTZ-R2 is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives. Substitute parts must maintain compatibility with existing PCB layouts, supply voltage requirements, and performance specifications within the defined operating parameters.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | Voltage Feedback | — |
| Number of Circuits | 1 | — |
| Output Type | Rail-to-Rail | — |
| Package / Case | SC-74A, SOT-753 | — |
| Supplier Device Package | SOT-23-5 | — |
| Mounting Type | Surface Mount | — |
| Slew Rate | 170 | V/µs |
| -3dB Bandwidth | 110 | MHz |
| Current - Input Bias | 1.4 | µA |
| Voltage - Input Offset | 1.8 | mV |
| Current - Supply | 4.8 | mA |
| Current - Output / Channel | 45 | mA |
| Voltage - Supply Span (Min) | 3 | V |
| Voltage - Supply Span (Max) | 12 | V |
| Operating Temperature | -40 to 85 | °C |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the AD8091ARTZ-R2 is determined by the following critical parameters:
Package Compatibility: All substitute parts must use the SOT-23-5 package (SC-74A, SOT-753) to ensure direct PCB footprint compatibility without layout modifications.
Electrical Interface: All candidates must provide single-circuit, rail-to-rail output operation with surface mount mounting type.
Supply Voltage Range: Substitute parts must operate within the minimum 3V to maximum 12V supply span of the original part. Parts with narrower supply ranges may be used only if the application operates entirely within their specified range.
Performance Parameters: The following parameters define acceptable substitution boundaries:
- Slew Rate: 170V/µs (original specification)
- -3dB Bandwidth: 110 MHz (original specification)
- Current - Input Bias: 1.4 µA (original specification)
- Voltage - Input Offset: 1.8 mV (original specification)
- Current - Supply: 4.8 mA (original specification)
- Current - Output / Channel: 45 mA (original specification)
Substitute parts may exceed these performance parameters without functional degradation. Parts with lower performance ratings require application-specific validation to confirm suitability.
Parameter Comparison
| Parameter | AD8091ARTZ-R2 | ADA4891-1ARJZ-RL | OPA725AIDBVR | OPA725AIDBVT | TSH80IYLT |
|---|---|---|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Texas Instruments | Texas Instruments | STMicroelectronics |
| Amplifier Type | Voltage Feedback | General Purpose | General Purpose | General Purpose | General Purpose |
| Number of Circuits | 1 | 1 | 1 | 1 | 1 |
| Output Type | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail |
| Package / Case | SC-74A, SOT-753 | SC-74A, SOT-753 | SC-74A, SOT-753 | SC-74A, SOT-753 | SC-74A, SOT-753 |
| Supplier Device Package | SOT-23-5 | SOT-23-5 | SOT-23-5 | SOT-23-5 | SOT-23-5 |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Slew Rate (V/µs) | 170 | 210 | 30 | 30 | 118 |
| -3dB Bandwidth (MHz) | 110 | 240 | — | — | 100 |
| Current - Input Bias (pA/µA) | 1.4 µA | 2 pA | 30 pA | 30 pA | 6 µA |
| Voltage - Input Offset (mV) | 1.8 | 2.5 | 1.2 | 1.2 | 0.8 |
| Current - Supply (mA) | 4.8 | 4.4 | 4.3 | 4.3 | 9.8 |
| Current - Output / Channel (mA) | 45 | 125 | 40 | 40 | 55 |
| Voltage - Supply Span (Min) | 3 V | 2.7 V | 4 V | 4 V | 4.5 V |
| Voltage - Supply Span (Max) | 12 V | 5.5 V | 12 V | 12 V | 12 V |
| Operating Temperature (°C) | -40 to 85 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 85 |
| Product Status | Discontinued | Active | Active | Active | Active |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 2 (1 Year) | 2 (1 Year) | 1 (Unlimited) |
| RoHS Status | — | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
ADA4891-1ARJZ-RL (Analog Devices Inc.)
The ADA4891-1ARJZ-RL is an active product with ROHS3 compliance and unlimited moisture sensitivity rating. This part exceeds the original AD8091ARTZ-R2 specifications in slew rate (210V/µs vs. 170V/µs) and bandwidth (240 MHz vs. 110 MHz). The ADA4891-1ARJZ-RL operates at a lower minimum supply voltage (2.7V vs. 3V) and maximum supply voltage (5.5V vs. 12V). Applications requiring operation above 5.5V supply voltage cannot use this substitute. The ADA4891-1ARJZ-RL provides superior input bias current performance (2 pA vs. 1.4 µA) and higher output current capability (125 mA vs. 45 mA). Extended operating temperature range (-40°C to 125°C) provides additional margin beyond the original specification.
OPA725AIDBVR and OPA725AIDBVT (Texas Instruments)
Both OPA725 variants are active products with ROHS3 compliance. These parts operate within the full supply voltage range of the original part (4V to 12V minimum and maximum). The OPA725 series exhibits lower slew rate (30V/µs vs. 170V/µs) and reduced bandwidth performance. These parts are suitable for applications where the original slew rate and bandwidth specifications exceed system requirements. The OPA725 series provides lower input offset voltage (1.2 mV vs. 1.8 mV) and comparable supply current consumption. Moisture sensitivity level is rated at 2 (1 Year), requiring controlled storage conditions compared to the unlimited rating of the original part. Extended operating temperature range (-40°C to 125°C) exceeds the original specification.
TSH80IYLT (STMicroelectronics)
The TSH80IYLT is an active product with ROHS3 compliance, unlimited moisture sensitivity rating, and AEC-Q100 automotive qualification. This part operates within the full supply voltage range of the original part (4.5V to 12V minimum and maximum). The TSH80IYLT provides slew rate performance (118V/µs) below the original specification (170V/µs) and -3dB bandwidth (100 MHz) comparable to the original (110 MHz). Input bias current is higher (6 µA vs. 1.4 µA), and supply current consumption is elevated (9.8 mA vs. 4.8 mA). The TSH80IYLT is suitable for automotive applications requiring AEC-Q100 qualification. Operating temperature range matches the original specification (-40°C to 85°C).
Frequently Asked Questions (FAQ)
Q: Can the ADA4891-1ARJZ-RL be used in applications requiring 12V supply voltage?
A: No. The ADA4891-1ARJZ-RL maximum supply voltage is 5.5V. Applications requiring operation at 12V supply voltage must use OPA725AIDBVR, OPA725AIDBVT, or TSH80IYLT.
Q: What is the primary difference between OPA725AIDBVR and OPA725AIDBVT?
A: Both parts are functionally identical with identical electrical specifications. The difference is packaging format: OPA725AIDBVR is supplied in Tape & Reel (TR) format, while OPA725AIDBVT is also supplied in Tape & Reel (TR) format. Inventory levels differ between the two variants.
Q: Is the TSH80IYLT suitable for non-automotive applications?
A: Yes. The TSH80IYLT meets all electrical and package requirements for general-purpose applications. The AEC-Q100 automotive qualification is an additional certification that does not restrict use in non-automotive designs.
Q: What is the impact of using OPA725 parts with lower slew rate in high-speed applications?
A: The OPA725 series slew rate of 30V/µs is significantly lower than the original AD8091ARTZ-R2 specification of 170V/µs. Applications requiring fast transient response or high-frequency signal amplification must validate that the reduced slew rate does not introduce unacceptable distortion or settling time delays.
Q: Are all substitute parts compatible with the original PCB layout?
A: Yes. All substitute parts use the SOT-23-5 package (SC-74A, SOT-753) with identical pin configuration and footprint. Direct component replacement on existing PCBs is possible without layout modifications.
Q: What is the significance of Moisture Sensitivity Level (MSL) rating differences?
A: The AD8091ARTZ-R2, ADA4891-1ARJZ-RL, and TSH80IYLT have MSL rating of 1 (Unlimited), allowing indefinite storage without moisture control. The OPA725 series has MSL rating of 2 (1 Year), requiring controlled storage conditions and baking procedures if storage exceeds one year or if the package is opened.
Q: Can substitute parts be mixed within a single design?
A: Yes. All substitute parts are pin-compatible and functionally equivalent at the circuit level. Mixed usage is permissible if each part's electrical specifications are validated for its specific application context.
Q: Which substitute part provides the best input offset voltage performance?
A: The TSH80IYLT provides the lowest input offset voltage at 0.8 mV, compared to 1.8 mV for the original AD8091ARTZ-R2. The OPA725 series provides 1.2 mV offset voltage. Applications requiring minimal offset voltage drift should prioritize the TSH80IYLT or OPA725 series.
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