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LMH6639MF Equivalent & Substitute Parts
Part Overview
The LMH6639MF is a voltage feedback operational amplifier manufactured by Texas Instruments, housed in a SOT-23-6 surface mount package. This device functions as a rail-to-rail output amplifier with a single circuit configuration, designed for applications requiring high-speed signal processing with moderate power consumption. The LMH6639MF is classified as Last Time Buy, indicating discontinued production status. Identification of equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for existing applications.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | Voltage Feedback | — |
| Number of Circuits | 1 | — |
| Output Type | Rail-to-Rail | — |
| Slew Rate | 200 | V/µs |
| Gain Bandwidth Product | 90 | MHz |
| -3dB Bandwidth | 228 | MHz |
| Current - Input Bias | 1.4 | µA |
| Voltage - Input Offset | 1.3 | mV |
| Current - Supply | 4.18 | mA |
| Current - Output / Channel | 112 | mA |
| Voltage - Supply Span (Min) | 3 | V |
| Voltage - Supply Span (Max) | 12 | V |
| Operating Temperature | -40 to 85 | °C |
| Package / Case | SOT-23-6 | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the LMH6639MF are classified into two categories based on parametric equivalence and manufacturer recommendation status.
Parametric Equivalents share identical electrical specifications and package configuration with the main part. These substitutes maintain the same amplifier type (voltage feedback), circuit count (1), output type (rail-to-rail), slew rate (200 V/µs), gain bandwidth product (90 MHz), -3dB bandwidth (228 MHz), input bias current (1.4 µA), input offset voltage (1.3 mV), supply current (4.18 mA), output current per channel (112 mA), supply voltage range (3 V to 12 V), operating temperature range (-40°C to 85°C), and SOT-23-6 package specification. These parts are direct functional replacements with no design modification required.
Manufacturer Recommended Substitutes are alternative devices from Analog Devices Inc. and Maxim Integrated that provide equivalent or superior performance characteristics within the same package family. These substitutes may exhibit variations in specific parameters such as slew rate, bandwidth, input bias current, input offset voltage, supply current, output current, or operating temperature range. Selection of these alternatives requires verification that the application tolerates the parameter deviations while maintaining functional compatibility.
Parameter Comparison
| Parameter | LMH6639MF | LMH6639MF/NOPB | LMH6639MFX/NOPB | AD8027ARTZ-R2 | AD8027ARTZ-REEL7 | ADA4805-1ARJZ-R2 | ADA4805-1ARJZ-R7 | MAX4380EUT+T | MAX4389EUT+T |
|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Maxim Integrated | Maxim Integrated |
| Amplifier Type | Voltage Feedback | Voltage Feedback | Voltage Feedback | Voltage Feedback | Voltage Feedback | General Purpose | General Purpose | Voltage Feedback | Voltage Feedback |
| Number of Circuits | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 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 |
| Slew Rate (V/µs) | 200 | 200 | 200 | 100 | 100 | 160 | 160 | 485 | 500 |
| Gain Bandwidth Product (MHz) | 90 | 90 | 90 | — | — | — | — | — | — |
| -3dB Bandwidth (MHz) | 228 | 228 | 228 | 190 | 190 | 105 | 105 | 210 | 85 |
| Current - Input Bias (µA) | 1.4 | 1.4 | 1.4 | 4 | 4 | 0.47 | 0.47 | 8.5 | — |
| Voltage - Input Offset (mV) | 1.3 | 1.3 | 1.3 | 0.2 | 0.2 | 0.009 | 0.009 | 3 | — |
| Current - Supply (mA) | 4.18 | 4.18 | 4.18 | 6.5 | 6.5 | 0.5 | 0.5 | 7.5 | 6 |
| Current - Output / Channel (mA) | 112 | 112 | 112 | 120 | 120 | 73 | 73 | — | 95 |
| Voltage - Supply Span Min (V) | 3 | 3 | 3 | 2.7 | 2.7 | 3 | 3 | 4.5 | 4.5 |
| Voltage - Supply Span Max (V) | 12 | 12 | 12 | 12 | 12 | 10 | 10 | 11 | 11 |
| Operating Temperature (°C) | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 85 | — |
| Package / Case | SOT-23-6 | SOT-23-6 | SOT-23-6 | SOT-23-6 | SOT-23-6 | SOT-23-6 | SOT-23-6 | SOT-23-6 | SOT-23-6 |
| Product Status | Last Time Buy | Active | Active | Active | Active | Active | Active | Active | Active |
| RoHS Status | 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) |
Engineering Selection Recommendations
Direct Parametric Equivalents (Recommended for Immediate Substitution)
LMH6639MF/NOPB and LMH6639MFX/NOPB are parametric equivalents manufactured by Texas Instruments. Both devices maintain identical electrical specifications and package configuration to the LMH6639MF. The primary distinction between these parts is product status: LMH6639MF/NOPB and LMH6639MFX/NOPB are classified as Active, ensuring continued availability and manufacturing support. These parts are suitable for direct substitution without design modification. Both are ROHS3 compliant with MSL rating of 1 (Unlimited).
Analog Devices Voltage Feedback Alternatives
AD8027ARTZ-R2 and AD8027ARTZ-REEL7 are voltage feedback amplifiers from Analog Devices Inc. These devices provide equivalent functional classification and package type. The AD8027 series exhibits lower slew rate (100 V/µs versus 200 V/µs), reduced -3dB bandwidth (190 MHz versus 228 MHz), higher input bias current (4 µA versus 1.4 µA), and lower input offset voltage (200 µV versus 1.3 mV). The AD8027 series supports extended operating temperature range (-40°C to 125°C) and lower minimum supply voltage (2.7 V versus 3 V). These devices are Active status with ROHS3 compliance and MSL 1 rating.
Analog Devices General Purpose Alternative
ADA4805-1ARJZ-R2 and ADA4805-1ARJZ-R7 are general purpose amplifiers from Analog Devices Inc. These devices differ from the LMH6639MF in amplifier classification (general purpose versus voltage feedback) and exhibit significantly different electrical characteristics: lower slew rate (160 V/µs), reduced -3dB bandwidth (105 MHz), substantially lower input bias current (470 nA), minimal input offset voltage (9 µV), and dramatically reduced supply current (500 µA). The ADA4805 series supports extended operating temperature range (-40°C to 125°C) but operates within a narrower supply voltage range (3 V to 10 V). These devices are Active status with ROHS3 compliance and MSL 1 rating.
Maxim Integrated High-Speed Alternatives
MAX4380EUT+T is a voltage feedback amplifier from Maxim Integrated with significantly enhanced slew rate (485 V/µs) and comparable -3dB bandwidth (210 MHz). This device exhibits higher input bias current (8.5 µA) and higher input offset voltage (3 mV). The MAX4380 operates within a narrower supply voltage range (4.5 V to 11 V) and maintains the same operating temperature range (-40°C to 85°C). This device is Active status with ROHS3 compliance and MSL 1 rating.
MAX4389EUT+T is a video amplifier variant from Maxim Integrated with the highest slew rate (500 V/µs) but reduced -3dB bandwidth (85 MHz). This device operates within a narrower supply voltage range (4.5 V to 11 V). This device is Active status with ROHS3 compliance and MSL 1 rating.
Frequently Asked Questions (FAQ)
Q: Can LMH6639MF/NOPB be used as a direct replacement for LMH6639MF?
A: Yes. LMH6639MF/NOPB is a parametric equivalent with identical electrical specifications, package configuration, and functional characteristics. The primary difference is product status: LMH6639MF/NOPB is Active, ensuring continued supply availability. No design modification is required.
Q: What is the difference between LMH6639MFX/NOPB and LMH6639MF/NOPB?
A: Both devices are parametric equivalents with identical electrical specifications and package configuration. The suffix designation indicates different manufacturing or packaging variants. Both are Active status and suitable for direct substitution.
Q: Can AD8027ARTZ-R2 replace LMH6639MF in all applications?
A: AD8027ARTZ-R2 is a voltage feedback amplifier with equivalent functional classification and package type. However, parameter deviations exist: lower slew rate (100 V/µs versus 200 V/µs), reduced -3dB bandwidth (190 MHz versus 228 MHz), higher input bias current (4 µA versus 1.4 µA), and lower input offset voltage (200 µV versus 1.3 mV). Applications sensitive to slew rate or bandwidth performance require evaluation. The AD8027 supports extended operating temperature range (-40°C to 125°C) and lower minimum supply voltage (2.7 V).
Q: Is ADA4805-1ARJZ-R2 suitable for high-speed applications requiring the LMH6639MF?
A: ADA4805-1ARJZ-R2 is classified as a general purpose amplifier with significantly reduced bandwidth (105 MHz versus 228 MHz) and lower slew rate (160 V/µs versus 200 V/µs). This device is not suitable for applications requiring the high-speed performance characteristics of the LMH6639MF. The ADA4805 is optimized for low-power operation (500 µA supply current) with superior input offset voltage performance (9 µV).
Q: What are the advantages of MAX4380EUT+T over LMH6639MF?
A: MAX4380EUT+T provides significantly higher slew rate (485 V/µs versus 200 V/µs) and comparable -3dB bandwidth (210 MHz). This device is suitable for applications requiring enhanced transient response. However, MAX4380EUT+T operates within a narrower supply voltage range (4.5 V to 11 V versus 3 V to 12 V) and exhibits higher input bias current (8.5 µA) and input offset voltage (3 mV).
Q: Are all substitute parts available in the same packaging format?
A: All substitute parts are housed in SOT-23-6 surface mount packages. However, packaging designation variants exist: LMH6639MF series uses Cut Tape (CT) & Digi-Reel® packaging, while AD8027ARTZ-R2, ADA4805-1ARJZ-R2, and MAX4380EUT+T use Tape & Reel (TR) packaging. Verify packaging compatibility with assembly equipment and procurement requirements.
Q: Do all substitute parts meet RoHS and REACH compliance requirements?
A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected. All devices carry MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling.
Q: Which substitute part offers the lowest power consumption?
A: ADA4805-1ARJZ-R2 and ADA4805-1ARJZ-R7 offer the lowest supply current at 500 µA, compared to 4.18 mA for LMH6639MF. However, the ADA4805 series is classified as general purpose amplifiers with reduced bandwidth performance and narrower supply voltage range (3 V to 10 V).
Q: Can MAX4389EUT+T be used in place of LMH6639MF?
A: MAX4389EUT+T is a video amplifier variant with the highest slew rate (500 V/µs) but significantly reduced -3dB bandwidth (85 MHz versus 228 MHz). This device is suitable only for applications where reduced bandwidth is acceptable. The MAX4389 operates within a narrower supply voltage range (4.5 V to 11 V).
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