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AD8005ARTZ-R2 Equivalent & Substitute Parts
Part Overview
The AD8005ARTZ-R2 is a current feedback amplifier manufactured by Analog Devices Inc., housed in a SOT-23-5 surface mount package. This single-circuit operational amplifier is designed for high-speed signal processing applications requiring slew rates up to 280V/µs and bandwidth of 270 MHz. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active product lines. Substitute parts must maintain compatibility with existing PCB layouts, supply voltage requirements, and signal processing specifications while accommodating the transition from current feedback to voltage feedback topologies where applicable.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | Current Feedback | — |
| Number of Circuits | 1 | — |
| Slew Rate | 280 | V/µs |
| -3dB Bandwidth | 270 | MHz |
| Current - Input Bias | 5 | µA |
| Voltage - Input Offset | 5 | mV |
| Current - Supply | 400 | µA |
| Current - Output / Channel | 10 | mA |
| Voltage - Supply Span (Min) | 4 | V |
| Voltage - Supply Span (Max) | 12 | V |
| Operating Temperature Range | -40 to 85 | °C |
| Mounting Type | Surface Mount | — |
| Package / Case | SC-74A, SOT-753 | — |
| Supplier Device Package | SOT-23-5 | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
| REACH Status | REACH Unaffected | — |
Substitute Part Grouping Explanation
Substitute parts for the AD8005ARTZ-R2 are grouped into two functional categories based on amplifier topology and electrical performance characteristics:
Category 1: Voltage Feedback Amplifiers (LT1722 and LT1812 Series)
The LT1722 and LT1812 series represent voltage feedback topologies that operate within the supply voltage range of 4V to 12V, overlapping with the original part's 4V to 12V specification. These parts maintain SOT-23-5 package compatibility and surface mount configuration. The LT1722 series operates at -40°C to 85°C (matching the original temperature range in certain variants) with 70V/µs slew rate and 200 MHz gain bandwidth product. The LT1812 series provides higher slew rate performance at 750V/µs with 100 MHz gain bandwidth product and extended supply voltage range (2.5V to 12.6V), accommodating broader application requirements.
Category 2: Buffer Amplifier (BUF602 Series)
The BUF602 series from Texas Instruments operates as a buffer amplifier with significantly higher slew rate (8000V/µs) and gain bandwidth product (1 GHz). This topology maintains SOT-23-5 package compatibility and surface mount configuration with supply voltage range of 2.8V to 12.6V. The BUF602 series extends the operating temperature range to -45°C to 85°C.
Key Parameters Determining Substitution:
- Package compatibility: SOT-23-5 surface mount
- Supply voltage overlap: Minimum 4V to maximum 12V
- Number of circuits: Single circuit requirement
- Operating temperature: -40°C to 85°C preferred
- Output current capability: Minimum 10 mA
- Mounting type: Surface mount
Parameter Comparison
| Parameter | AD8005ARTZ-R2 | LT1722IS5#TRPBF | LT1722CS5#TRPBF | LT1812IS5#TRPBF | LT1812CS5#TRPBF | BUF602IDBVT |
|---|---|---|---|---|---|---|
| Amplifier Type | Current Feedback | Voltage Feedback | Voltage Feedback | Voltage Feedback | Voltage Feedback | Buffer |
| Number of Circuits | 1 | 1 | 1 | 1 | 1 | 1 |
| Slew Rate (V/µs) | 280 | 70 | 70 | 750 | 750 | 8000 |
| Bandwidth / Gain Bandwidth Product (MHz) | 270 | 200 | 200 | 100 | 100 | 1000 |
| Current - Input Bias (µA / nA) | 5 µA | 40 nA | 40 nA | 900 nA | 900 nA | 3 µA |
| Voltage - Input Offset (mV / µV) | 5 mV | 150 µV | 150 µV | 400 µV | 400 µV | 16 mV |
| Current - Supply (mA) | 0.4 | 3.7 | 3.7 | 3 | 3 | 5.8 |
| Current - Output / Channel (mA) | 10 | 50 | 50 | 60 | 60 | 60 |
| Voltage - Supply Span Min (V) | 4 | 5 | 5 | 2.5 | 2.5 | 2.8 |
| Voltage - Supply Span Max (V) | 12 | 10 | 10 | 12.6 | 12.6 | 12.6 |
| Operating Temperature (°C) | -40 to 85 | -40 to 85 | 0 to 70 | -40 to 85 | 0 to 70 | -45 to 85 |
| Package / Case | SC-74A, SOT-753 | SOT-23-5 Thin, TSOT-23-5 | SOT-23-5 Thin, TSOT-23-5 | SOT-23-5 Thin, TSOT-23-5 | SOT-23-5 Thin, TSOT-23-5 | SC-74A, SOT-753 |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| RoHS Status | — | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 2 (1 Year) |
| REACH Status | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected |
Engineering Selection Recommendations
LT1722IS5#TRPBF and LT1722IS5#TRMPBF (Recommended for Direct Replacement)
The LT1722IS5 variants are the primary substitutes for the AD8005ARTZ-R2. Both parts maintain the full operating temperature range of -40°C to 85°C, matching the original specification. These voltage feedback amplifiers are ROHS3 compliant and REACH unaffected, with unlimited moisture sensitivity rating (MSL 1). The LT1722IS5#TRPBF variant is available in Tape & Reel packaging with 3000 pieces in stock, while the LT1722IS5#TRMPBF variant is available in Cut Tape & Digi-Reel packaging with 1900 pieces in stock. Both maintain SOT-23-5 package compatibility and surface mount configuration. The supply voltage range of 5V to 10V overlaps with the original 4V to 12V specification within the 5V to 10V window. Output current capability of 50 mA exceeds the original 10 mA requirement.
LT1812IS5#TRPBF and LT1812IS5#TRMPBF (Extended Performance Alternative)
The LT1812IS5 variants provide higher slew rate performance (750V/µs versus 280V/µs) and extended supply voltage range (2.5V to 12.6V), accommodating broader application requirements. Both variants maintain the full operating temperature range of -40°C to 85°C. The LT1812IS5#TRPBF is available in Tape & Reel packaging with 3171 pieces in stock, while the LT1812IS5#TRMPBF is available in Cut Tape & Digi-Reel packaging with 1277 pieces in stock. Both are ROHS3 compliant, REACH unaffected, and carry MSL 1 rating. Output current capability of 60 mA exceeds the original requirement.
LT1722CS5 Variants (Limited Temperature Range)
The LT1722CS5#TRPBF and LT1722CS5#TRMPBF variants operate within 0°C to 70°C temperature range, which does not cover the full -40°C to 85°C specification of the original part. These variants are suitable only for applications with restricted operating temperature requirements. Both are ROHS3 compliant and REACH unaffected with MSL 1 rating.
LT1812CS5 Variants (Limited Temperature Range)
The LT1812CS5#TRPBF and LT1812CS5#TRMPBF variants operate within 0°C to 70°C temperature range, which does not cover the full -40°C to 85°C specification of the original part. These variants are suitable only for applications with restricted operating temperature requirements. Both are ROHS3 compliant and REACH unaffected with MSL 1 rating.
BUF602IDBVT (High-Speed Buffer Alternative)
The BUF602IDBVT from Texas Instruments provides significantly higher performance with 8000V/µs slew rate and 1 GHz gain bandwidth product. This buffer amplifier extends the operating temperature range to -45°C to 85°C and maintains SOT-23-5 package compatibility. The supply voltage range of 2.8V to 12.6V accommodates the original 4V to 12V specification. The BUF602IDBVT is ROHS3 compliant and REACH unaffected. However, this part carries MSL 2 (1 Year) rating compared to the original MSL 1 (Unlimited). The BUF602IDBVT is available in Tape & Reel packaging with 1387 pieces in stock.
Frequently Asked Questions (FAQ)
Q: Can the LT1722 series directly replace the AD8005ARTZ-R2 without circuit modifications?
A: The LT1722 series maintains SOT-23-5 package compatibility and surface mount configuration, enabling direct PCB placement. However, the topology change from current feedback to voltage feedback may require feedback network adjustments. The LT1722 operates with voltage feedback architecture, which typically requires different external resistor and capacitor values compared to current feedback designs. Circuit simulation and validation are necessary to confirm performance equivalence in the specific application.
Q: What is the significance of the supply voltage range difference between the AD8005ARTZ-R2 (4V to 12V) and LT1722 (5V to 10V)?
A: The AD8005ARTZ-R2 operates from 4V to 12V, while the LT1722 operates from 5V to 10V. Applications requiring operation below 5V or above 10V cannot use the LT1722 series. The LT1812 series provides extended supply voltage range (2.5V to 12.6V), accommodating broader supply specifications. Verify the actual supply voltage requirements of the application before selecting a substitute part.
Q: Why do some LT1722 and LT1812 variants have restricted operating temperature ranges (0°C to 70°C)?
A: The commercial temperature grade variants (LT1722CS5 and LT1812CS5) are specified for 0°C to 70°C operation, while industrial temperature grade variants (LT1722IS5 and LT1812IS5) are specified for -40°C to 85°C operation. The original AD8005ARTZ-R2 operates across -40°C to 85°C. For applications requiring full temperature range operation, select only the industrial grade (IS5) variants.
Q: What does the packaging designation difference between TRPBF and TRMPBF indicate?
A: TRPBF indicates Tape & Reel (TR) packaging format, while TRMPBF indicates Cut Tape (CT) & Digi-Reel packaging format. Both are surface mount compatible and suitable for automated assembly. The choice between these packaging formats depends on production volume and assembly equipment capabilities. TRPBF is typically used for higher-volume production, while TRMPBF accommodates lower-volume or mixed-component requirements.
Q: How does the slew rate difference between the AD8005ARTZ-R2 (280V/µs) and substitute parts affect circuit performance?
A: The AD8005ARTZ-R2 provides 280V/µs slew rate. The LT1722 series offers 70V/µs, the LT1812 series offers 750V/µs, and the BUF602 offers 8000V/µs. Lower slew rates (LT1722) may limit high-frequency signal fidelity and transient response speed. Higher slew rates (LT1812, BUF602) provide improved transient performance but may introduce additional noise in sensitive applications. Select based on the specific signal bandwidth and transient requirements of the application.
Q: What is the impact of input bias current differences on circuit design?
A: The AD8005ARTZ-R2 has 5 µA input bias current. The LT1722 series has 40 nA (significantly lower), the LT1812 series has 900 nA, and the BUF602 has 3 µA. Lower input bias current reduces offset voltage errors and improves precision in transimpedance amplifier configurations. Higher input bias current may require input bias current compensation networks in precision applications. Verify input bias current requirements for the specific application circuit topology.
Q: Are all substitute parts RoHS3 compliant?
A: All substitute parts listed (LT1722 series, LT1812 series, and BUF602 series) are ROHS3 compliant and REACH unaffected. The original AD8005ARTZ-R2 does not specify RoHS status in the provided data. All substitute parts meet current environmental compliance requirements for electronic components.
Q: What is the significance of Moisture Sensitivity Level (MSL) differences?
A: The AD8005ARTZ-R2 and all LT1722 and LT1812 variants carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. The BUF602 series carries MSL 2 (1 Year), requiring storage in controlled humidity conditions and limiting shelf life to one year from manufacturing. For applications with extended storage requirements or high-humidity environments, the MSL 1 rated parts (LT1722 and LT1812 series) are preferred.
Q: Can the BUF602 buffer amplifier replace the AD8005ARTZ-R2 in all applications?
A: The BUF602 is a buffer amplifier topology, fundamentally different from the current feedback amplifier topology of the AD8005ARTZ-R2. Buffer amplifiers are designed for impedance transformation and signal distribution, not for transimpedance or transresistance amplification. The BUF602 is suitable only for applications requiring high-speed buffering with minimal gain. Verify the specific application requirements before selecting the BUF602 as a substitute.
Q: What inventory considerations should guide part selection?
A: The LT1722IS5#TRPBF has the highest inventory (3000 pieces), followed by LT1812IS5#TRPBF (3171 pieces) and BUF602IDBVR (45323 pieces). The LT1812IS5#TRMPBF has the lowest inventory among recommended substitutes (1277 pieces). For applications requiring immediate availability, the LT1722IS5#TRPBF or LT1812IS5#TRPBF are preferred. The BUF602IDBVR variant (not Tape & Reel) has significantly higher stock levels if buffer amplifier functionality is acceptable.
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