LMH6503MA Variable Gain Amplifier Equivalent & Substitute Parts

Part Overview

The LMH6503MA is a wideband, low-power variable gain amplifier integrated circuit designed for single-channel signal conditioning applications. This device operates across a 5V to 12V supply range with a -3dB bandwidth of 135 MHz and slew rate of 1800V/µs, making it suitable for precision gain control in analog signal processing systems.

The LMH6503MA is classified as "Not For New Designs" by Texas Instruments. This status necessitates identification of functionally equivalent alternatives for ongoing production, maintenance, and new development projects requiring variable gain amplification in the 14-SOIC package format.

Substiute Parts

LMH6503MA

Texas InstrumentsIn Stock: 1189LMH6503MA Datasheet

Current PartRFQ

LMH6503MA/NOPB

National SemiconductorIn Stock: 1247LMH6503MA/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LMH6503MA is determined by strict equivalence across the following critical parameters:

Functional Parameters:

• Amplifier Type: Variable Gain (single-channel configuration)
• Number of Circuits: 1
• Slew Rate: 1800V/µs
• -3dB Bandwidth: 135 MHz

Electrical Parameters:

• Input Bias Current: 11 µA
• Supply Current: 37 mA
• Output Current per Channel: 90 mA
• Supply Voltage Range: 5V to 12V
• Operating Temperature: -40°C to 85°C

Physical Parameters:

• Package: 14-SOIC (0.154", 3.90mm Width)
• Mounting: Surface Mount

Substitute parts must match all parameters listed above. Deviations in any parameter disqualify a part from direct substitution.

Parameter Comparison

Engineering Selection Recommendations

LMH6503MA/NOPB is the direct functional equivalent to the LMH6503MA. This substitute part maintains identical electrical and mechanical specifications across all critical parameters.

The primary distinction between these parts is product status: the LMH6503MA carries a "Not For New Designs" designation from Texas Instruments, while the LMH6503MA/NOPB is classified as "Active" by National Semiconductor. This status difference indicates ongoing availability and support for the LMH6503MA/NOPB variant.

Both parts are packaged in 14-SOIC surface-mount format and operate within the same temperature range (-40°C to 85°C) and supply voltage envelope (5V to 12V). Pin-to-pin compatibility is confirmed, enabling direct PCB-level substitution without circuit redesign.

For applications requiring RoHS compliance or specific moisture sensitivity documentation, component-level compliance verification with the supplier is necessary, as these attributes are not uniformly specified across both variants.

Frequently Asked Questions (FAQ)

Q: Can LMH6503MA/NOPB be used as a direct replacement for LMH6503MA in existing designs?

A: Yes. The LMH6503MA/NOPB is electrically and mechanically equivalent to the LMH6503MA. All functional parameters, supply requirements, output characteristics, and package specifications are identical. Direct PCB substitution is possible without circuit modification.

Q: What does the "/NOPB" suffix indicate?

A: The "/NOPB" suffix denotes "No Plumbum" (lead-free) packaging. This indicates the part is manufactured without lead in the solder and plating materials, distinguishing it from standard leaded variants.

Q: Why is the LMH6503MA marked "Not For New Designs"?

A: This designation indicates Texas Instruments has discontinued active development and support for this product line. The part remains available from existing inventory, but new designs should evaluate active alternatives. The LMH6503MA/NOPB, classified as "Active," represents the supported continuation of this product family.

Q: Are there any differences in pin configuration between these parts?

A: No. Both parts use the 14-SOIC package with identical pin assignments. Pin-to-pin compatibility is complete.

Q: What is the moisture sensitivity level for the LMH6503MA/NOPB?

A: Moisture sensitivity level data is not provided in the available specifications for the LMH6503MA/NOPB. Contact the supplier for detailed moisture sensitivity and storage requirements if this parameter is critical for your application.

Q: Can these parts be used interchangeably in high-frequency applications?

A: Yes. Both parts maintain the same -3dB bandwidth (135 MHz) and slew rate (1800V/µs), confirming equivalent performance in wideband signal conditioning applications up to 135 MHz.

Q: What is the typical supply current consumption?

A: Both the LMH6503MA and LMH6503MA/NOPB draw 37 mA from the supply, with maximum output current capability of 90 mA per channel.