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BU7244SF-E2 Equivalent & Substitute Parts
Part Overview
The BU7244SF-E2 is a CMOS amplifier integrated circuit manufactured by Rohm Semiconductor, configured as a 4-circuit rail-to-rail operational amplifier in a 14-SOP surface mount package. This device is classified as Active product status and is ROHS3 compliant. The BU7244SF-E2 operates across a supply voltage range of 1.8 V to 5.5 V with an operating temperature range of -40°C to 85°C, making it suitable for low-power analog signal conditioning applications. Substitute parts are identified when equivalent electrical performance parameters and mechanical compatibility are required due to component availability, supply chain considerations, or design optimization needs.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer Part Number | BU7244SF-E2 | — |
| Manufacturer | Rohm Semiconductor | — |
| Category | Linear, Amplifiers | — |
| Amplifier Type | CMOS | — |
| Number of Circuits | 4 | — |
| Output Type | Rail-to-Rail | — |
| Package / Case | 14-SOIC (0.173", 4.40mm Width) | — |
| Mounting Type | Surface Mount | — |
| Voltage - Supply Span (Min) | 1.8 | V |
| Voltage - Supply Span (Max) | 5.5 | V |
| Operating Temperature | -40 to 85 | °C |
| Slew Rate | 0.4 | V/µs |
| Gain Bandwidth Product | 900 | kHz |
| Current - Input Bias | 1 | pA |
| Voltage - Input Offset | 1 | mV |
| Current - Supply | 360 | µA |
| Current - Output / Channel | 12 | mA |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the BU7244SF-E2 are identified based on the following critical parameters that determine functional and mechanical compatibility:
Primary Substitution Criteria:
- Number of Circuits: 4 (quad amplifier configuration)
- Output Type: Rail-to-Rail
- Mounting Type: Surface Mount
- Package Category: 14-pin SOIC/SOP configuration
- Amplifier Type: CMOS or General Purpose
- Voltage Supply Range: Minimum 1.8 V to 5.5 V maximum (or compatible subset)
- Operating Temperature Range: -40°C minimum to 85°C minimum (or extended range)
Substitution Logic: Substitute parts are grouped into two categories based on amplifier type and performance characteristics:
-
General Purpose Amplifier Substitutes (AD8544 Series): These Analog Devices parts maintain the 4-circuit, rail-to-rail, 14-SOIC configuration with extended operating temperature range (-40°C to 125°C) and higher supply current per channel (45 µA × 4 channels). These substitutes provide higher slew rate (0.92 V/µs) and gain bandwidth product (1 MHz) compared to the BU7244SF-E2.
-
CMOS Amplifier Substitutes (AD8604 and AD8608 Series): These Analog Devices parts maintain CMOS amplifier type classification with 4-circuit, rail-to-rail, 14-SOIC configuration and extended operating temperature range (-40°C to 125°C). The AD8604 series provides 6 V/µs slew rate and 8.4 MHz gain bandwidth product. The AD8608 series provides 5 V/µs slew rate and 10 MHz gain bandwidth product, with higher output current capability (80 mA per channel).
All substitute parts are ROHS3 compliant, MSL 1 (Unlimited), and maintain surface mount configuration with 14-pin SOIC package geometry compatible with BU7244SF-E2 PCB layouts.
Parameter Comparison
| Parameter | BU7244SF-E2 | AD8544ARZ-REEL | AD8544ARZ-REEL7 | AD8544WARZ-R7 | AD8604ARZ | AD8604ARZ-REEL | AD8604ARZ-REEL7 | AD8604DRZ | AD8604DRZ-REEL | AD8608ARZ | AD8608ARZ-REEL |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Rohm Semiconductor | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. |
| Amplifier Type | CMOS | General Purpose | General Purpose | General Purpose | CMOS | CMOS | CMOS | CMOS | CMOS | CMOS | CMOS |
| Number of Circuits | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Output Type | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail |
| Slew Rate (V/µs) | 0.4 | 0.92 | 0.92 | 0.92 | 6 | 6 | 6 | 6 | 6 | 5 | 5 |
| Gain Bandwidth Product (MHz) | 0.9 | 1 | 1 | 1 | 8.4 | 8.4 | 8.4 | 8.4 | 8.4 | 10 | 10 |
| Current - Input Bias (pA) | 1 | 4 | 4 | 4 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 1 | 1 |
| Voltage - Input Offset (mV) | 1 | 1 | 1 | 1 | 0.08 | 0.08 | 0.08 | 1.3 | 1.3 | 0.08 | 0.08 |
| Current - Supply (µA) | 360 | 180 | 180 | 180 | 3000 | 3000 | 3000 | 3000 | 3000 | 4000 | 4000 |
| Current - Output / Channel (mA) | 12 | 30 | 30 | 30 | 50 | 50 | 50 | 50 | 50 | 80 | 80 |
| Voltage - Supply Span (Min) (V) | 1.8 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 |
| Voltage - Supply Span (Max) (V) | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 |
| Operating Temperature (°C) | -40 to 85 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| 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) | 14-SOIC (0.154", 3.90mm) | 14-SOIC (0.154", 3.90mm) | 14-SOIC (0.154", 3.90mm) | 14-SOIC (0.154", 3.90mm) | 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 | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
All substitute parts listed maintain Active product status and ROHS3 compliance, ensuring long-term availability and regulatory conformance equivalent to the BU7244SF-E2. Selection among substitute options depends on application-specific requirements:
For applications requiring minimum supply voltage of 1.8 V: The BU7244SF-E2 is the only option among the listed parts, as all Analog Devices substitutes require minimum 2.7 V supply voltage. Designs operating at 1.8 V cannot use the AD8544, AD8604, or AD8608 series without supply voltage modification.
For applications with operating temperature requirements limited to 85°C maximum: The BU7244SF-E2 is suitable. All substitute parts extend the upper operating temperature to 125°C, providing additional thermal margin for high-temperature environments.
For applications requiring low supply current consumption: The AD8544 series (45 µA × 4 channels = 180 µA total) provides lower supply current than the BU7244SF-E2 (360 µA). The AD8604 and AD8608 series consume higher supply current (3000 µA and 4000 µA respectively) and are not suitable for ultra-low-power applications.
For applications requiring higher slew rate and gain bandwidth product: The AD8604 series (6 V/µs, 8.4 MHz) and AD8608 series (5 V/µs, 10 MHz) provide significantly improved dynamic performance compared to the BU7244SF-E2 (0.4 V/µs, 900 kHz).
For applications requiring higher output current per channel: The AD8608 series provides 80 mA per channel, compared to 12 mA for the BU7244SF-E2, enabling direct drive of higher impedance loads.
For packaging considerations: The BU7244SF-E2 uses 14-SOIC with 0.173" (4.40mm) width, while all Analog Devices substitutes use 14-SOIC with 0.154" (3.90mm) width. PCB layout modifications may be required for package footprint compatibility.
Frequently Asked Questions (FAQ)
Q: Can the AD8544 series directly replace the BU7244SF-E2 in all applications?
A: The AD8544 series is mechanically and functionally compatible for applications operating at supply voltages of 2.7 V or higher. Applications requiring 1.8 V minimum supply voltage cannot use the AD8544 series. Additionally, the AD8544 package width (0.154") differs from the BU7244SF-E2 (0.173"), requiring PCB footprint verification. The AD8544 series provides higher slew rate (0.92 V/µs vs. 0.4 V/µs) and gain bandwidth product (1 MHz vs. 900 kHz), which may affect circuit stability in designs optimized for the BU7244SF-E2 characteristics.
Q: What is the difference between the AD8604 and AD8608 series?
A: Both series are CMOS amplifiers with 4 circuits in 14-SOIC configuration and rail-to-rail output. The AD8608 provides higher slew rate (5 V/µs vs. 6 V/µs for AD8604), higher gain bandwidth product (10 MHz vs. 8.4 MHz), and higher output current per channel (80 mA vs. 50 mA). The AD8604 provides lower input offset voltage (80 µV vs. 1.3 mV for the DRZ variant). Selection depends on whether higher bandwidth and output drive capability (AD8608) or lower offset voltage (AD8604) is required.
Q: Are there packaging differences between the substitute parts?
A: All substitute parts use 14-SOIC surface mount packages. The BU7244SF-E2 uses 14-SOIC with 0.173" (4.40mm) width. All Analog Devices substitutes (AD8544, AD8604, AD8608 series) use 14-SOIC with 0.154" (3.90mm) width. This difference requires PCB footprint verification and may necessitate layout modifications. Pin assignments and functional pinout are compatible across all parts.
Q: What is the significance of the packaging designations (CT, TR, Tube)?
A: Packaging designations indicate the form in which components are supplied. Cut Tape (CT) & Digi-Reel® indicates components on continuous tape with reel packaging suitable for automated pick-and-place assembly. Tape & Reel (TR) indicates standard tape and reel format. Tube indicates components supplied in plastic tubes for manual handling. All formats contain the same die and electrical characteristics; the designation affects only supply and handling logistics.
Q: Can I use the AD8604 or AD8608 in place of the BU7244SF-E2 in a low-power application?
A: The AD8604 and AD8608 series consume significantly higher supply current (3000 µA and 4000 µA respectively) compared to the BU7244SF-E2 (360 µA). These substitutes are not suitable for battery-powered or ultra-low-power applications where the BU7244SF-E2 was selected for its low supply current characteristics.
Q: What are the input bias current differences among the substitute options?
A: The BU7244SF-E2 has 1 pA input bias current. The AD8544 series has 4 pA. The AD8604 series has 0.2 pA. The AD8608 series has 1 pA. Lower input bias current reduces errors in high-impedance signal conditioning circuits. The AD8604 series provides the lowest input bias current among all options.
Q: Are all substitute parts ROHS3 compliant?
A: Yes, all listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the compliance status of the BU7244SF-E2. All parts are suitable for applications requiring environmental and regulatory compliance equivalent to the original part.
Q: What is the operating temperature range difference?
A: The BU7244SF-E2 operates from -40°C to 85°C. All Analog Devices substitute parts operate from -40°C to 125°C, providing extended high-temperature capability. Applications limited to 85°C maximum temperature can use either the BU7244SF-E2 or any substitute. Applications requiring operation above 85°C must use one of the Analog Devices substitutes.
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