Texas Instruments LMH6624MF

Overview

LMH6624MF from Texas Instruments is a single-channel ultra-low-noise, wideband voltage-feedback operational amplifier in SOT-23-5 package. It delivers 1.5 GHz gain bandwidth, 0.92 nV/√Hz input voltage noise, and 350 V/μs slew rate at ±6 V supply, enabling high-fidelity signal conditioning in ultrasound pre-amplifiers and instrumentation sense amplifiers.

For engineers reviewing the LMH6624MF datasheet, LMH6624MF pinout, LMH6624MF application, or LMH6624MF equivalent, this page provides verified electrical specifications, validated SOT-23-5 terminal mapping, real-world use cases in medical and audio systems, and two confirmed alternative op-amps with documented performance trade-offs.

Technical Context

The LMH6624MF uses a traditional voltage-feedback topology with balanced differential inputs, delivering 81 dB open-loop gain and 95 dB CMRR. Its architecture supports stable closed-loop operation at |A_V| ≥ 10 in both inverting and non-inverting configurations without external compensation.

It operates across dual supplies (±2.5 V to ±6 V) or single supplies (5 V to 12 V), with rail-to-rail output swing up to ±4.9 V (±6 V supply) and low 10 mΩ output impedance below 100 kHz-critical for driving capacitive loads in active filter stages.

Key Specifications

Pinout & Package

SOT-23-5 package (2.90 mm × 1.60 mm body size), surface-mount, thermally enhanced for high-speed analog applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-noise wideband op-amp applications.

Compared with OPA847IDBVR and ADA4898-1ARMZ, the LMH6624MF uniquely balances 1.5 GHz bandwidth, 0.92 nV/√Hz noise, and SOT-23-5 footprint-making it optimal for space-constrained, high-SNR ultrasound and instrumentation designs requiring no PCB redesign.

Availability

LMH6624MF is available at Aetrix Electronics and suitable for instrumentation sense amplifiers, ultrasound pre-amplifiers, and professional audio systems requiring stable component supply, traceable sourcing, and lifecycle continuity.

Supply support for LMH6624MF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in high-performance op-amps and signal chain solutions.

The LMH6624MF belongs to TI's LMH high-speed amplifier product line, engineered specifically for ultra-low-noise, wideband applications including medical imaging, test equipment, and communications infrastructure.

FAQ

What is the maximum operating supply voltage for LMH6624MF?

The LMH6624MF supports dual-supply operation up to ±6 V (12 V total) and single-supply operation from 5 V to 12 V. Absolute maximum ratings specify 13.2 V between V+ and V− pins; exceeding this risks permanent damage. Operation at ±6 V enables its full ±4.9 V output swing into 100 Ω, as confirmed in the Electrical Characteristics tables under ±6 V conditions.

Is LMH6624MF stable in unity-gain configuration?

No, the LMH6624MF is not unity-gain stable. The datasheet explicitly states stability for closed-loop |A_V| ≥ 10. Attempting unity-gain operation causes peaking and potential oscillation, as shown in Figure 45's amplifier peaking plots with varying RF. For gains below 10, external compensation or a different op-amp (e.g., OPA837) is required.

Does LMH6624MF support single-supply operation with rail-to-rail output?

Yes, LMH6624MF operates from 5 V to 12 V single supply and delivers rail-to-rail output swing-up to 4.65 V peak into no load and ±4.3 V into 100 Ω at 12 V supply-as verified in Table 6.6 Electrical Characteristics. Input common-mode range extends to within 0.5 V of rails, enabling true single-supply sensor interface designs.

What is the thermal resistance (RθJA) of LMH6624MF in SOT-23-5 package?

The LMH6624MF in SOT-23-5 (DBV) package has a junction-to-ambient thermal resistance (RθJA) of 265°C/W, per Section 6.4 Thermal Information. This value assumes standard JEDEC 2S2P board mounting; actual thermal performance improves with copper pour and thermal vias beneath the exposed pad (if present) or optimized PCB layout.

Can LMH6624MF drive a 50 Ω coaxial cable directly?

LMH6624MF can drive 50 Ω loads but requires series output isolation (e.g., 10–22 Ω resistor) to prevent instability and ringing, as indicated by frequency response plots with capacitive loading (Figures 9–12) and layout guidelines recommending R_ISO = 10 Ω for 1 kΩ||C_L loads. Direct 50 Ω termination without isolation risks gain peaking and degraded settling time.