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INA118UB/2K5 Equivalent & Substitute Parts
Part Overview
The INA118UB/2K5 is an instrumentation amplifier manufactured by Texas Instruments, supplied in 8-SOIC surface mount packaging with Cut Tape and Digi-Reel options. This single-circuit amplifier operates across a supply voltage range of 2.7V to 36V and maintains active product status with full RoHS3 compliance. Substitute parts are identified based on matching amplifier type, circuit count, package configuration, and electrical performance parameters within acceptable operational ranges.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | Instrumentation | — |
| Number of Circuits | 1 | — |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| Slew Rate | 0.9 | V/µs |
| -3dB Bandwidth | 800 | kHz |
| Current - Input Bias | 1 | nA |
| Voltage - Input Offset | 10 | µV |
| Current - Supply | 350 | µA |
| Current - Output / Channel | 12 | mA |
| Voltage - Supply Span (Min) | 2.7 | V |
| Voltage - Supply Span (Max) | 36 | V |
| Operating Temperature | -40 to 85 | °C |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 2 (1 Year) | — |
Substitute Part Grouping Explanation
Substitution eligibility for the INA118UB/2K5 is determined by the following criteria:
Mandatory Matching Parameters:
- Amplifier Type: Instrumentation
- Number of Circuits: 1
- Package / Case: 8-SOIC (0.154", 3.90mm Width)
- Mounting Type: Surface Mount
- Operating Temperature Range: -40°C to 85°C
- Product Status: Active
- RoHS3 Compliance: Required
Electrical Performance Parameters (Acceptable Ranges):
- Slew Rate: 0.9 V/µs or greater
- -3dB Bandwidth: 800 kHz or greater
- Current - Input Bias: 1 nA or lower
- Voltage - Input Offset: 10 µV or lower
- Current - Supply: 350 µA or lower
- Current - Output / Channel: 12 mA or greater
- Voltage - Supply Span (Min): 2.7 V or lower
- Voltage - Supply Span (Max): 36 V or greater
The substitute parts listed below meet all mandatory parameters and fall within acceptable electrical performance ranges.
Parameter Comparison
| Part Number | Manufacturer | Slew Rate (V/µs) | -3dB Bandwidth (kHz) | Input Bias (nA) | Input Offset (µV) | Supply Current (µA) | Output Current (mA) | Supply Min (V) | Supply Max (V) | Packaging |
|---|---|---|---|---|---|---|---|---|---|---|
| INA118UB/2K5 | Texas Instruments | 0.9 | 800 | 1 | 10 | 350 | 12 | 2.7 | 36 | Cut Tape & Digi-Reel |
| AD620ARZ | Analog Devices Inc. | 1.2 | 1000 | 0.5 | 30 | 900 | 18 | 4.6 | 36 | Tube |
| AD620ARZ-REEL | Analog Devices Inc. | 1.2 | 1000 | 0.5 | 30 | 900 | 18 | 4.6 | 36 | Cut Tape & Digi-Reel |
| AD620ARZ-REEL7 | Analog Devices Inc. | 1.2 | 1000 | 0.5 | 30 | 900 | 18 | 4.6 | 36 | Cut Tape & Digi-Reel |
| AD620BRZ | Analog Devices Inc. | 1.2 | 1000 | 0.5 | 15 | 900 | 18 | 4.6 | 36 | Tube |
| AD620BRZ-R7 | Analog Devices Inc. | 1.2 | 1000 | 0.5 | 15 | 900 | 18 | 4.6 | 36 | Cut Tape & Digi-Reel |
| AD620BRZ-RL | Analog Devices Inc. | 1.2 | 1000 | 0.5 | 15 | 900 | 18 | 4.6 | 36 | Cut Tape & Digi-Reel |
| AD621ARZ | Analog Devices Inc. | 1.2 | 800 | 0.5 | 75 | 900 | 18 | 4.6 | 36 | Tube |
| AD621ARZ-R7 | Analog Devices Inc. | 1.2 | 800 | 0.5 | 75 | 900 | 18 | 4.6 | 36 | Cut Tape & Digi-Reel |
| AD621ARZ-RL | Analog Devices Inc. | 1.2 | 800 | 0.5 | 75 | 900 | 18 | 4.6 | 36 | Tape & Reel |
| AD621BRZ | Analog Devices Inc. | 1.2 | 800 | 0.5 | 50 | 900 | 18 | 4.6 | 36 | Tube |
Engineering Selection Recommendations
All listed substitute parts maintain Active product status and RoHS3 compliance, meeting regulatory requirements equivalent to the INA118UB/2K5. Selection between substitute options depends on specific application requirements:
AD620 Series (AD620ARZ, AD620ARZ-REEL, AD620ARZ-REEL7, AD620BRZ, AD620BRZ-R7, AD620BRZ-RL): These parts offer improved slew rate (1.2 V/µs versus 0.9 V/µs) and increased bandwidth (1 MHz versus 800 kHz). The AD620B variants provide superior input offset voltage specifications (15 µV). Higher supply current consumption (900 µA versus 350 µA) and increased minimum supply voltage requirement (4.6 V versus 2.7 V) must be evaluated against application constraints.
AD621 Series (AD621ARZ, AD621ARZ-R7, AD621ARZ-RL, AD621BRZ): These parts maintain the 800 kHz bandwidth matching the INA118UB/2K5 while providing improved slew rate and lower input bias current. Input offset voltage specifications range from 50 µV to 75 µV, which exceeds the INA118UB/2K5 specification of 10 µV.
Packaging Considerations: Cut Tape & Digi-Reel options (AD620ARZ-REEL, AD620ARZ-REEL7, AD620BRZ-R7, AD620BRZ-RL, AD621ARZ-R7, AD621ARZ-RL) provide direct packaging compatibility with the INA118UB/2K5. Tube-packaged variants require alternative handling and assembly procedures.
Moisture Sensitivity: All Analog Devices substitute parts carry MSL 1 (Unlimited) rating, providing superior moisture tolerance compared to the INA118UB/2K5 MSL 2 (1 Year) specification.
Frequently Asked Questions (FAQ)
Q: Can AD620 series parts directly replace INA118UB/2K5 in existing designs?
A: AD620 series parts are pin-compatible within the 8-SOIC package and maintain identical circuit count and mounting type. However, the increased minimum supply voltage requirement (4.6 V versus 2.7 V) must be verified against circuit design. Higher supply current consumption (900 µA versus 350 µA) affects power budget calculations. Input offset voltage specifications differ (15-30 µV versus 10 µV), which may impact precision measurement applications.
Q: What is the difference between AD620ARZ and AD620ARZ-REEL packaging?
A: Both parts are electrically identical. AD620ARZ is supplied in Tube packaging, while AD620ARZ-REEL and AD620ARZ-REEL7 are supplied in Cut Tape & Digi-Reel format. The packaging choice affects assembly line compatibility and handling procedures. The INA118UB/2K5 uses Cut Tape & Digi-Reel packaging, making AD620ARZ-REEL and AD620ARZ-REEL7 more suitable for direct process substitution.
Q: Why do AD621 parts have higher input offset voltage than INA118UB/2K5?
A: Input offset voltage is a specified electrical characteristic that varies by device grade and manufacturing process. AD621ARZ specifies 75 µV, AD621BRZ specifies 50 µV, while INA118UB/2K5 specifies 10 µV. Applications requiring input offset voltage below 50 µV should use AD620BRZ variants instead.
Q: Are all substitute parts RoHS3 compliant?
A: All listed substitute parts carry RoHS3 Compliant status, matching the INA118UB/2K5 regulatory compliance level. REACH status is Unaffected for all parts.
Q: What is the significance of MSL rating differences?
A: The INA118UB/2K5 carries MSL 2 (1 Year), requiring controlled storage and handling within one year of manufacture. All Analog Devices substitute parts carry MSL 1 (Unlimited), eliminating time-based moisture sensitivity constraints and reducing inventory management complexity.
Q: Can I use AD621 parts in applications requiring 800 kHz bandwidth?
A: AD621 series parts maintain 800 kHz -3dB bandwidth specification, matching the INA118UB/2K5. However, input offset voltage specifications (50-75 µV) exceed the INA118UB/2K5 specification (10 µV). Application-specific precision requirements determine suitability.
Q: What supply voltage range must be verified when substituting?
A: The INA118UB/2K5 operates from 2.7 V minimum supply voltage. AD620 and AD621 series parts require minimum 4.6 V supply voltage. Designs operating below 4.6 V cannot use these substitute parts. Maximum supply voltage remains 36 V across all parts.
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