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AD8057ARZ Equivalent & Substitute Parts
Part Overview
The AD8057ARZ is a voltage feedback amplifier manufactured by Analog Devices Inc., designed for high-speed signal conditioning applications. This single-circuit operational amplifier operates across a 3V to 12V supply range with a slew rate of 1150V/µs and -3dB bandwidth of 325 MHz. The device is housed in an 8-SOIC surface mount package and maintains active product status with full RoHS3 compliance.
Substitute parts are necessary when the AD8057ARZ reaches end-of-life status, when alternative packaging formats are required for manufacturing processes, or when design specifications allow for performance variations within acceptable operating parameters.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | Voltage Feedback | — |
| Number of Circuits | 1 | — |
| Slew Rate | 1150 | V/µs |
| -3dB Bandwidth | 325 | MHz |
| Current - Input Bias | 500 | nA |
| Voltage - Input Offset | 1 | mV |
| Current - Supply | 6 | mA |
| Voltage - Supply Span (Min) | 3 | V |
| Voltage - Supply Span (Max) | 12 | V |
| Operating Temperature | -40 to 85 | °C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the AD8057ARZ are grouped based on the following substitution criteria:
Primary Substitution Criteria:
- Amplifier Type: Voltage Feedback
- 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
- Supply Voltage Compatibility: Minimum 3V to 12V maximum
Secondary Performance Parameters:
- Slew Rate: 1150V/µs or higher
- -3dB Bandwidth: 325 MHz or higher
- Input Bias Current: 500 nA or lower
- Input Offset Voltage: 1 mV or lower
- Supply Current: 6 mA or lower
Substitute parts are classified into two categories:
Category A - Direct Voltage Feedback Substitutes: Parts maintaining voltage feedback amplifier topology with single-circuit configuration in 8-SOIC packaging. These include OPA820IDR, OPA820IDG4, OPA830ID, OPA830IDR, and OPA890ID.
Category B - Enhanced Performance Substitutes: Parts with differential output capability or higher performance metrics that operate within the same package and temperature specifications. These include LMH6550MA/NOPB, LMH6550MAX/NOPB, THS4502CD, and THS4502ID.
Parameter Comparison
| Part Number | Manufacturer | Amplifier Type | Slew Rate (V/µs) | -3dB Bandwidth (MHz) | Input Bias (nA) | Input Offset (mV) | Supply Current (mA) | Supply Min (V) | Supply Max (V) | Temp Range (°C) | Package | Product Status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AD8057ARZ | Analog Devices Inc. | Voltage Feedback | 1150 | 325 | 500 | 1 | 6 | 3 | 12 | -40 to 85 | 8-SOIC | Active |
| OPA820IDR | Texas Instruments | Voltage Feedback | 240 | 800 | 9000 | 0.2 | 5.6 | 5 | 12 | -40 to 85 | 8-SOIC | Active |
| OPA820IDG4 | Texas Instruments | Voltage Feedback | 240 | 800 | 9000 | 0.2 | 5.6 | 5 | 12 | -40 to 85 | 8-SOIC | Discontinued at DiGi Electronics |
| OPA830ID | Texas Instruments | Voltage Feedback | 600 | 310 | 5000 | 1.5 | 4.25 | 2.8 | 11 | -40 to 85 | 8-SOIC | Active |
| OPA830IDR | Texas Instruments | Voltage Feedback | 600 | 310 | 5000 | 1.5 | 4.25 | 2.8 | 11 | -40 to 85 | 8-SOIC | Active |
| OPA890ID | Texas Instruments | Voltage Feedback | 500 | 260 | 100 | 1 | 1.1 | 3 | 12 | -40 to 85 | 8-SOIC | Active |
| LMH6550MA/NOPB | National Semiconductor | Voltage Feedback | 3000 | 400 | 8000 | 1 | 20 | 4.5 | 12 | -40 to 85 | 8-SOIC | Active |
| LMH6550MAX/NOPB | Texas Instruments | Voltage Feedback | 3000 | 400 | 8000 | 1 | 20 | 4.5 | 12 | -40 to 85 | 8-SOIC | Active |
| THS4502CD | Texas Instruments | Differential | 2800 | 370 | 4000 | 1 | 23 | 4.5 | 15 | 0 to 70 | 8-SOIC | Active |
| THS4502ID | Texas Instruments | Differential | 2800 | 370 | 4000 | 1 | 23 | 4.5 | 15 | -40 to 85 | 8-SOIC | Active |
Engineering Selection Recommendations
Recommended Direct Substitutes (Voltage Feedback, Single Circuit):
OPA830IDR / OPA830ID – Texas Instruments voltage feedback amplifier with active product status. Operates within the AD8057ARZ supply voltage range (2.8V to 11V) and temperature specification (-40°C to 85°C). Slew rate of 600V/µs and -3dB bandwidth of 310 MHz provide comparable performance. Input bias current of 5 µA and input offset voltage of 1.5 mV remain within acceptable tolerances. RoHS3 compliant with MSL 2 rating. Suitable for applications where lower slew rate is acceptable.
OPA890ID – Texas Instruments voltage feedback amplifier with active product status. Operates across the full AD8057ARZ supply range (3V to 12V) and temperature specification (-40°C to 85°C). Input bias current of 100 nA provides superior performance to the AD8057ARZ. Supply current of 1.1 mA is significantly lower. Slew rate of 500V/µs and -3dB bandwidth of 260 MHz are lower than the main part but suitable for lower-frequency applications. RoHS3 compliant with MSL 2 rating.
OPA820IDR – Texas Instruments voltage feedback amplifier with active product status. Operates within the AD8057ARZ temperature range (-40°C to 85°C). -3dB bandwidth of 800 MHz exceeds the main part specification. Supply voltage range of 5V to 12V requires minimum 5V operation. Input offset voltage of 0.2 mV is superior to the main part. RoHS3 compliant with MSL 2 rating. Suitable for applications requiring higher bandwidth with modified supply requirements.
Alternative Substitutes (Enhanced Performance):
LMH6550MAX/NOPB – Texas Instruments voltage feedback amplifier with differential output capability and active product status. Slew rate of 3000V/µs and -3dB bandwidth of 400 MHz exceed main part specifications. Supply voltage range of 4.5V to 12V requires minimum 4.5V operation. Supply current of 20 mA is higher than the main part. RoHS3 compliant with MSL 1 rating. Suitable for high-speed differential applications.
LMH6550MA/NOPB – National Semiconductor voltage feedback amplifier with differential output capability and active product status. Specifications match LMH6550MAX/NOPB. Suitable for applications requiring differential output topology.
THS4502ID – Texas Instruments differential amplifier with active product status and extended temperature range (-40°C to 85°C). Slew rate of 2800V/µs and -3dB bandwidth of 370 MHz exceed main part specifications. Supply voltage range of 4.5V to 15V requires minimum 4.5V operation. Supply current of 23 mA is higher than the main part. RoHS3 compliant with MSL 1 rating. Suitable for differential signal conditioning applications.
Avoid:
OPA820IDG4 – Discontinued at DiGi Electronics. Not recommended for new designs despite active base product status.
THS4502CD – Operating temperature range limited to 0°C to 70°C, which does not meet the full -40°C to 85°C specification of the AD8057ARZ.
Frequently Asked Questions (FAQ)
Q: Can OPA830IDR directly replace AD8057ARZ in all applications?
A: OPA830IDR operates within compatible supply voltage and temperature ranges. However, the minimum supply voltage is 2.8V versus 3V for the AD8057ARZ, and maximum supply voltage is 11V versus 12V. Verify that your application operates within the 2.8V to 11V range. Slew rate of 600V/µs is lower than the AD8057ARZ specification of 1150V/µs. Applications requiring the full 1150V/µs slew rate performance must use alternative parts.
Q: What is the difference between OPA820IDR and OPA820IDG4?
A: Both parts share identical electrical specifications. OPA820IDR is packaged in Cut Tape (CT) & Digi-Reel format with active product status. OPA820IDG4 is packaged in Tube format but is discontinued at DiGi Electronics. For new designs and ongoing production, OPA820IDR is the recommended variant.
Q: Why do some substitute parts have higher supply current requirements?
A: Supply current varies based on internal circuit topology and performance characteristics. LMH6550MAX/NOPB and THS4502ID require 20 mA and 23 mA respectively, compared to 6 mA for the AD8057ARZ. Higher supply current reflects enhanced performance metrics including higher slew rates and bandwidth. Verify that your power supply design accommodates the increased current draw.
Q: Can differential amplifiers like THS4502ID replace the single-ended AD8057ARZ?
A: THS4502ID is a differential amplifier with differential output topology, whereas AD8057ARZ is a voltage feedback amplifier with single-ended output. Differential amplifiers require different circuit configurations and biasing networks. Direct substitution is not recommended without circuit redesign. THS4502ID is suitable only for applications specifically designed for differential signal processing.
Q: What does MSL 1 (Unlimited) versus MSL 2 (1 Year) mean for component handling?
A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be stored in a non-controlled environment before soldering. MSL 1 (Unlimited) components like AD8057ARZ and LMH6550MAX/NOPB have no time restriction. MSL 2 (1 Year) components like OPA830IDR must be soldered within one year of opening the original packaging. Verify your manufacturing timeline and storage conditions when selecting substitute parts.
Q: Are all substitute parts RoHS3 compliant?
A: All substitute parts listed are RoHS3 compliant. The AD8057ARZ is also RoHS3 compliant. RoHS3 compliance ensures restriction of hazardous substances in accordance with current environmental regulations.
Q: What is the significance of the 8-SOIC package specification?
A: The 8-SOIC (Small Outline Integrated Circuit) package with 0.154" width and 3.90mm width is a standard surface mount package. All substitute parts use the same 8-SOIC package, ensuring mechanical and electrical compatibility with existing PCB layouts and assembly processes. No PCB redesign is required for package compatibility.
Q: Which substitute part offers the lowest power consumption?
A: OPA890ID offers the lowest supply current at 1.1 mA, compared to 6 mA for the AD8057ARZ. This represents an 82% reduction in supply current. OPA890ID is suitable for battery-powered and low-power applications where power consumption is critical.
Q: Can OPA820IDR be used in applications requiring the full 1150V/µs slew rate of AD8057ARZ?
A: No. OPA820IDR has a slew rate of 240V/µs, which is significantly lower than the AD8057ARZ specification of 1150V/µs. Applications requiring high slew rate performance must use OPA890ID (500V/µs), LMH6550MAX/NOPB (3000V/µs), or THS4502ID (2800V/µs).
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