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Texas Instruments LMH6626MA
- Part No.:
- LMH6626MA
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6626MA.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,977
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Product details
Overview
LMH6626MA from Texas Instruments is a dual ultra-low-noise, wideband voltage-feedback operational amplifier in SOIC-8 package, delivering 1.3 GHz gain bandwidth, 0.92–1.0 nV/√Hz input voltage noise, and ±4.9 V output swing (±6 V supply), optimized for high-fidelity signal conditioning in ultrasound pre-amplifiers and instrumentation sense amplifiers.
For engineers reviewing the LMH6626MA datasheet, LMH6626MA pinout, LMH6626MA application, or LMH6626MA equivalent, key selection criteria include its dual-channel low-noise architecture, stability at |AV| ≥10, 320–360 V/μs slew rate across supply ranges, and verified performance in medical diagnostic and professional audio front-end designs.
Technical Context
The LMH6626MA implements a traditional voltage-feedback topology with balanced differential inputs, enabling precise dc-coupled gain stages. Its design supports stable closed-loop operation at minimum gain of |AV| = 10 in both inverting and non-inverting configurations, with 87–95 dB CMRR and 82–88 dB PSRR over temperature.
It operates from ±2.25 V to ±6.3 V dual supply or 5 V to 12 V single supply, with per-channel supply current of 12–16 mA. Input offset voltage is limited to ±0.7 mV over −40°C to +125°C, and crosstalk rejection reaches −75 dB at 1 MHz-critical for dual-channel isolation in simultaneous-sampling systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 1.3 GHz - enables stable amplification up to ~85 MHz at AV = 10, suitable for wideband active filters and RF IF stages. |
| Input Voltage Noise | 1.0 nV/√Hz @ 1 MHz - ensures minimal added noise in low-level sensor interfaces like magnetic tape/disk pre-amps. |
| Slew Rate | 360 V/μs @ AV = +20, ±6 V - supports fast transient response in pulse-based ultrasound receive chains. |
| Output Swing | ±4.9 V @ RL = 100 Ω, ±6 V supply - delivers full-scale dynamic range into moderate loads without clipping. |
| CMRR | 95 dB @ ±6 V, 25°C - rejects common-mode interference in differential-sensing applications such as instrumentation amplifiers. |
| Crosstalk Rejection | −75 dB @ 1 MHz - maintains channel independence in dual-channel systems like stereo audio or multi-element ultrasound beamforming. |
| Supply Current (per channel) | 16 mA max @ ±6 V - balances high-speed performance with power efficiency in thermally constrained PCB layouts. |
Pinout & Package
LMH6626MA is housed in an 8-pin SOIC (Package D, body size 4.90 mm × 3.91 mm) with standard dual-opamp pinout and two no-connect pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Channel A output - drives external load or next-stage input; requires local decoupling and controlled-impedance routing. |
| 2 | IN A− | Inverting input Channel A - connects to feedback network; sensitive to parasitic capacitance affecting stability. |
| 3 | IN A+ | Non-inverting input Channel A - high-impedance node; must be guarded against noise coupling in low-level analog paths. |
| 4 | V− | Negative supply rail - shared return path for both channels; requires low-inductance connection to ground plane. |
| 5 | N/C | No connection - electrically isolated; must remain unconnected to avoid parasitic coupling or mechanical stress. |
| 6 | OUT B | Channel B output - independent output stage; layout symmetry recommended to minimize inter-channel thermal gradients. |
| 7 | IN B+ | Non-inverting input Channel B - identical function to Pin 3; critical for matched gain accuracy in differential pair configurations. |
| 8 | V+ | Positive supply rail - powers both op-amp cores; bypassing with 0.1 μF ceramic + 10 μF tantalum is mandatory. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input voltage noise | 1.0 nV/√Hz enables detection of sub-microvolt signals in medical ultrasound and precision instrumentation. |
| Stable for |AV| ≥ 10 | Eliminates need for external compensation in high-gain configurations, reducing component count and board area. |
| Dual-channel isolation | −75 dB crosstalk at 1 MHz ensures independent operation for time-aligned dual-path signal processing. |
| Wide supply range | Operates from ±2.25 V to ±6.3 V or 5–12 V single supply, supporting legacy and modern low-voltage systems. |
| Low input offset drift | ±0.2 μV/°C over −40°C to +125°C maintains dc accuracy in automotive and industrial environments. |
Applications
| Ultrasound Pre-amps | Instrumentation Sense Amplifiers |
|---|---|
Use Scenario: Amplifying weak echo signals (µV-level) from piezoelectric transducers in portable and cart-based diagnostic systems. IC Role / Device Role / Timing Role: First-stage low-noise voltage amplifier in analog front-end (AFE), preserving SNR before ADC sampling. Use Value: 1.0 nV/√Hz input noise and 360 V/μs slew rate enable clean capture of high-frequency (>10 MHz) echoes with minimal distortion. | Use Scenario: Measuring microvolt-level bridge outputs from strain gauges or RTDs in test-and-measurement equipment. IC Role / Device Role / Timing Role: Precision dc-coupled gain stage with matched dual channels for ratiometric or differential sensing. Use Value: ±0.7 mV max VOS and 95 dB CMRR ensure accurate low-level signal extraction amid noisy industrial environments. |
| Magnetic Tape & Disk Pre-amps | Professional Audio Systems |
Use Scenario: Recovering high-frequency analog waveforms from magnetic playback heads in archival digitization systems. IC Role / Device Role / Timing Role: Wideband, low-distortion gain block compensating for head inductance roll-off above 100 kHz. Use Value: −80 dBc HD3 at 10 MHz and 1.3 GHz GBW support extended frequency response with low harmonic contamination. | Use Scenario: Line-level signal buffering and gain control in studio mixing consoles and high-end DAC output stages. IC Role / Device Role / Timing Role: Dual-channel unity-gain buffer or programmable gain amplifier driving low-impedance cables and loads. Use Value: ±4.9 V output swing into 100 Ω and 16 mA supply current balance fidelity, drive capability, and thermal management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-noise op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6626MM | VSSOP-8 package (3.0 mm × 3.0 mm); identical electrical specs; higher thermal resistance (RθJA = 235°C/W vs. 166°C/W). | Better suited for space-constrained PCBs where thermal margin allows; less robust for continuous high-output-current operation. | Select LMH6626MM only when board area is critical and power dissipation remains below 150 mW per channel. |
| OPA211AIDR | Lower noise (1.1 nV/√Hz), lower bandwidth (45 MHz), higher precision (±25 µV VOS), but not stable below AV = 1. | Preferred for dc-critical, low-bandwidth instrumentation; unsuitable for >10 MHz signal paths or gain ≥10 without compensation. | Choose OPA211AIDR for high-accuracy, low-frequency (<5 MHz) applications where ultra-low VOS outweighs bandwidth needs. |
Compared with LMH6626MA, LMH6626MM offers identical performance in a smaller footprint but reduced thermal headroom, while OPA211AIDR trades bandwidth and gain stability for superior dc precision and slightly higher noise-making LMH6626MA the optimal choice for wideband, medium-gain, dual-channel analog front-ends.
Availability
LMH6626MA is available at Aetrix Electronics and suitable for ultrasound pre-amplifiers, instrumentation sense amplifiers, and professional audio systems requiring stable component supply, long-term manufacturability, and TI-qualified production lots.
Supply support for LMH6626MA 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 leader specializing in analog and embedded processing technologies, with decades of expertise in high-performance op-amps and signal-chain solutions.
The LMH6626MA belongs to TI's LMH high-speed amplifier product line, engineered specifically for wideband, low-noise applications including medical imaging, test equipment, and communications infrastructure.
FAQ
What is the minimum stable gain for LMH6626MA?
The LMH6626MA is specified as stable for closed-loop gains of |AV| ≥ 10 in both inverting and non-inverting configurations. This is confirmed in the official datasheet (SNOSA42G, Section 1, Features). Operating below this gain requires external compensation and is not guaranteed by TI. The LMH6626MA's internal compensation is optimized for ≥10× gain, making it unsuitable for unity-gain or low-gain buffers without modification.
Does LMH6626MA support single-supply operation?
Yes, LMH6626MA operates from a single supply of 5 V to 12 V, as specified in the Recommended Operating Conditions (Section 6.3). Input common-mode range extends to within 0.5 V of the negative rail and up to 1.75–5.25 V from the positive rail depending on supply, and output swing reaches within ~0.8 V of each rail. Proper biasing of input and feedback networks is required for dc-coupled single-supply use.
What is the maximum junction temperature for LMH6626MA?
The absolute maximum junction temperature for LMH6626MA is 150°C, per Section 6.1 Absolute Maximum Ratings. At ambient temperatures up to +125°C and with RθJA = 166°C/W (SOIC-8), continuous operation requires total power dissipation ≤ 150 mW per channel to avoid exceeding TJ(MAX). Derating curves and thermal layout guidelines are provided in Sections 6.4 and 10 of the datasheet.
How does LMH6626MA compare to LMH6624 in noise performance?
LMH6626MA and LMH6624 share identical input voltage noise: 0.92 nV/√Hz (LMH6624) and 1.0 nV/√Hz (LMH6626MA) at 1 MHz under ±6 V supply. Both exhibit matching current noise (2.3 pA/√Hz and 1.8 pA/√Hz respectively). The minor difference reflects measurement variance-not functional distinction-and both meet the "ultra-low-noise" specification required for demanding analog front-ends.
Is LMH6626MA pin-compatible with other TI dual op-amps like OPA2691?
No, LMH6626MA is not pin-compatible with OPA2691 or other TI dual op-amps. Its SOIC-8 pinout (OUT A, IN A−, IN A+, V−, N/C, OUT B, IN B+, V+) differs from OPA2691's configuration (which places V+ at Pin 8 but assigns Pins 1/5 as outputs and 2/6 as IN−, 3/7 as IN+, 4 as V−). Substitution requires PCB redesign. Always verify pin functions using the official LMH6626MA datasheet (SNOSA42G, Section 5).
LMH6626MA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMH®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 400V/µs
- Gain Bandwidth Product:
- 1.5 GHz
- -3db Bandwidth:
- 95 MHz
- Current - Input Bias:
- 13 µA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 12mA (x2 Channels)
- Current - Output / Channel:
- 80 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LMH6626MA FAQ
1.How can I place an order for LMH6626MA through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6626MA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LMH6626MA reliable?
The price and inventory of LMH6626MA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6626MA is usually 5 days.
3.What payment methods are accepted for LMH6626MA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6626MA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6626MA?
LMH6626MA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6626MA order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LMH6626MA?
For technical support, including LMH6626MA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6626MA requirements.
6.How does Aetrix verify that LMH6626MA is sourced from the original manufacturer or authorized distributors?
All LMH6626MA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LMH6626MA meets industry standards.
7.What is the process for return or replacement of LMH6626MA?
All LMH6626MA units undergo pre-shipment inspection (PSI). If there is an issue with LMH6626MA, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LMH6626MA part is unused and in its original packaging.
Return procedure for LMH6626MA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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