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BU7264SF-E2 Equivalent & Substitute Parts
Part Overview
The BU7264SF-E2 is a CMOS 4-circuit operational amplifier manufactured by Rohm Semiconductor, packaged in 14-SOP surface mount configuration. This rail-to-rail amplifier operates across a 1.8V to 5.5V supply range with low input bias current (1 pA) and is designed for general-purpose analog signal conditioning applications. The part is Active status and RoHS3 compliant. Equivalent and substitute parts are identified to support design flexibility, supply chain alternatives, and packaging options while maintaining functional compatibility within specified electrical parameters.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | CMOS | — |
| Number of Circuits | 4 | — |
| Output Type | Rail-to-Rail | — |
| Slew Rate | 1.1 | V/µs |
| Gain Bandwidth Product | 2 | MHz |
| Current - Input Bias | 1 | pA |
| Voltage - Input Offset | 1 | mV |
| Current - Supply | 550 | µA |
| Current - Output / Channel | 12 | mA |
| Voltage - Supply Span (Min) | 1.8 | V |
| Voltage - Supply Span (Max) | 5.5 | V |
| Operating Temperature | -40 to 105 | °C |
| Package / Case | 14-SOIC (0.173", 4.40mm Width) | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the BU7264SF-E2 are selected based on the following critical parameters that define functional equivalence:
Primary Substitution Criteria:
- 4-circuit operational amplifier configuration
- Rail-to-rail output capability
- Surface mount 14-pin SOIC package
- Supply voltage range compatibility (minimum 1.8V to 5.5V maximum)
- Operating temperature range (-40°C to 105°C or wider)
- CMOS or general-purpose amplifier type
- RoHS3 compliance and MSL 1 rating
Substitution Groups:
Group 1: Analog Devices AD8544 Series (General Purpose Amplifiers) Parts: AD8544ARZ, AD8544ARZ-REEL, AD8544ARZ-REEL7, AD8544WARZ-R7
These general-purpose 4-circuit amplifiers meet core substitution criteria with rail-to-rail output, 14-SOIC packaging, and supply range 2.7V to 5.5V. Operating temperature extends to 125°C. Packaging variants (Tube, Cut Tape & Digi-Reel, Tape & Reel) provide supply chain flexibility. Slew rate (0.92V/µs) and gain bandwidth product (1 MHz) are lower than BU7264SF-E2, suitable for applications not requiring higher frequency response.
Group 2: Analog Devices AD8604 Series (CMOS Amplifiers, DigiTrim®) Parts: AD8604ARZ, AD8604ARZ-REEL, AD8604ARZ-REEL7, AD8604DRZ, AD8604DRZ-REEL
These CMOS 4-circuit amplifiers provide enhanced performance with higher slew rate (6V/µs) and gain bandwidth product (8.4 MHz). Input bias current (0.2 pA) is significantly lower. Supply range 2.7V to 5.5V and 14-SOIC packaging maintain compatibility. Operating temperature to 125°C. Variants include different input offset voltage specifications (80 µV for ARZ, 1.3 mV for DRZ) and packaging options.
Group 3: Analog Devices AD8608 Series (CMOS Amplifiers, DigiTrim®) Part: AD8608ARZ
This CMOS 4-circuit amplifier offers highest performance with slew rate 5V/µs and gain bandwidth product 10 MHz. Input bias current (1 pA) matches BU7264SF-E2. Supply range 2.7V to 5.5V and 14-SOIC packaging. Output current per channel (80 mA) exceeds BU7264SF-E2 capability. Operating temperature to 125°C.
Parameter Comparison
| Parameter | BU7264SF-E2 | AD8544ARZ | AD8604ARZ | AD8608ARZ |
|---|---|---|---|---|
| Manufacturer | Rohm Semiconductor | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. |
| Amplifier Type | CMOS | General Purpose | CMOS | CMOS |
| Number of Circuits | 4 | 4 | 4 | 4 |
| Output Type | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail |
| Slew Rate (V/µs) | 1.1 | 0.92 | 6 | 5 |
| Gain Bandwidth Product (MHz) | 2 | 1 | 8.4 | 10 |
| Current - Input Bias (pA) | 1 | 4 | 0.2 | 1 |
| Voltage - Input Offset (mV) | 1 | 1 | 0.08 | 0.08 |
| Current - Supply (µA) | 550 | 45 (x4) | 750 (x4) | 1000 (x4) |
| Current - Output / Channel (mA) | 12 | 30 | 50 | 80 |
| Voltage - Supply Span (Min) | 1.8 V | 2.7 V | 2.7 V | 2.7 V |
| Voltage - Supply Span (Max) | 5.5 V | 5.5 V | 5.5 V | 5.5 V |
| Operating Temperature | -40 to 105°C | -40 to 125°C | -40 to 125°C | -40 to 125°C |
| Package / Case | 14-SOIC (0.173", 4.40mm) | 14-SOIC (0.154", 3.90mm) | 14-SOIC (0.154", 3.90mm) | 14-SOIC (0.154", 3.90mm) |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
Substitution Compatibility Assessment:
All identified substitute parts maintain Active product status and RoHS3 compliance, ensuring regulatory and supply chain continuity. The following selection guidance applies based on application requirements:
For Direct Functional Replacement (Lowest Risk): AD8544 series parts provide the closest functional match to BU7264SF-E2 in terms of slew rate and gain bandwidth product characteristics. These parts are suitable for applications where the original performance envelope is adequate. The lower supply current (45 µA total) offers power efficiency advantage. Packaging variants (Tube, Cut Tape & Digi-Reel, Tape & Reel) accommodate different procurement and assembly workflows.
For Enhanced Performance Applications: AD8604 series parts deliver higher slew rate (6V/µs) and gain bandwidth product (8.4 MHz) with significantly lower input bias current (0.2 pA). These CMOS amplifiers are appropriate for applications requiring improved frequency response and precision. Two variants exist: ARZ grade with 80 µV input offset voltage and DRZ grade with 1.3 mV offset, allowing specification-matched selection.
For Maximum Performance Requirements: AD8608ARZ provides the highest slew rate (5V/µs) and gain bandwidth product (10 MHz) with output current capability (80 mA per channel) exceeding BU7264SF-E2. This part suits applications demanding superior transient response and higher load driving capability.
Package Consideration: Substitute parts use 14-SOIC with 0.154" width (3.90mm) versus BU7264SF-E2 at 0.173" width (4.40mm). PCB layout verification is required to confirm footprint compatibility, though both are standard 14-pin SOIC configurations.
Supply Voltage Compatibility: BU7264SF-E2 operates from 1.8V minimum; all substitute parts require minimum 2.7V. Applications using 1.8V to 2.6V supply range cannot use these substitutes without circuit redesign.
Frequently Asked Questions (FAQ)
Q1: Can AD8544 series parts directly replace BU7264SF-E2 in existing designs?
A: AD8544 series parts are functionally compatible for applications where slew rate (0.92V/µs) and gain bandwidth product (1 MHz) meet performance requirements. The lower supply current (45 µA total) is advantageous. However, minimum supply voltage is 2.7V versus 1.8V for BU7264SF-E2, so designs operating below 2.7V require circuit modification. PCB footprint verification is necessary due to package width difference (3.90mm versus 4.40mm).
Q2: What is the primary difference between AD8604 and AD8608 series?
A: Both are CMOS amplifiers with superior performance versus AD8544. AD8604 provides slew rate 6V/µs and gain bandwidth product 8.4 MHz. AD8608 offers higher slew rate (5V/µs) and gain bandwidth product (10 MHz) with increased output current capability (80 mA per channel versus 50 mA). AD8604 is suitable for general high-performance applications; AD8608 is specified for applications requiring maximum output drive capability.
Q3: Are packaging variants (Tube, Cut Tape & Digi-Reel, Tape & Reel) electrically equivalent?
A: Yes. Packaging variants of the same base part number (e.g., AD8544ARZ, AD8544ARZ-REEL, AD8544ARZ-REEL7) are electrically identical. Differences are in delivery format only: Tube for manual handling, Cut Tape & Digi-Reel for semi-automated assembly, and Tape & Reel for fully automated pick-and-place systems. Selection depends on manufacturing process requirements, not electrical performance.
Q4: What does the "DRZ" suffix in AD8604DRZ indicate versus "ARZ"?
A: Both AD8604ARZ and AD8604DRZ are CMOS amplifiers with identical electrical performance except for input offset voltage specification. ARZ grade specifies 80 µV maximum input offset; DRZ grade specifies 1.3 mV maximum input offset. ARZ is appropriate for precision applications; DRZ is suitable for general-purpose use with lower cost. Slew rate, gain bandwidth product, and all other parameters are identical.
Q5: Why does BU7264SF-E2 have lower minimum supply voltage (1.8V) than substitutes?
A: This is a design characteristic of the Rohm BU7264 architecture. Analog Devices AD8544, AD8604, and AD8608 families are specified with 2.7V minimum supply voltage. Applications requiring operation below 2.7V cannot use these substitutes. Alternative parts from the original substitute list (LMV824IYDT, MCP6424T-E/SL, MCP6284-E/SL, OPA4350UA/2K5, LMV824AIYDT) may support lower supply voltages and should be evaluated separately.
Q6: Is PCB layout modification required when substituting BU7264SF-E2 with AD8544/AD8604/AD8608?
A: Package width differs: BU7264SF-E2 is 4.40mm; substitutes are 3.90mm. Both are standard 14-pin SOIC configurations with identical pin pitch (1.27mm). Footprint compatibility depends on PCB design tolerance. Most modern PCB designs accommodate both widths within standard SOIC footprints. However, layout verification is mandatory before production implementation to confirm pad alignment and clearance.
Q7: Do all substitute parts maintain RoHS3 compliance and MSL 1 rating?
A: Yes. All identified substitute parts (AD8544, AD8604, AD8608 series) are RoHS3 compliant and rated MSL 1 (Unlimited moisture sensitivity level). Regulatory and environmental compliance is maintained across all substitutions.
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