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Texas Instruments LMH6626MM
- Part No.:
- LMH6626MM
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMH6626MM.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,774
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Product details
Overview
LMH6626MM from Texas Instruments is a dual ultra-low-noise, wideband voltage-feedback operational amplifier in VSSOP-8 package, delivering 1.3 GHz gain bandwidth, 0.92–1.0 nV/√Hz input voltage noise, and ±4.8 V output swing (±6 V supply), optimized for ultrasound pre-amplifiers and instrumentation sense amplifiers.
For engineers reviewing the LMH6626MM datasheet, LMH6626MM pinout, LMH6626MM application, or LMH6626MM equivalent, key selection criteria include its dual-channel architecture, VSSOP-8 thermal performance (RθJA = 166°C/W), stability at |AV| ≥10, and differential-input, single-ended-output signal conditioning in high-dynamic-range analog front-ends.
Technical Context
The LMH6626MM implements a traditional voltage-feedback topology with balanced high-impedance inputs, enabling precise dc-coupled gain stages. Its 81 dB open-loop gain and 95 dB CMRR support accurate low-level signal amplification without common-mode interference.
Designed for closed-loop operation at |AV| ≥10, it maintains stability with minimal external compensation-no external capacitor required for unity-gain stability-and achieves 18 ns 0.1% settling time at ±6 V supply, supporting fast pulse acquisition in medical imaging and test equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth | 1.3 GHz - enables stable closed-loop gain ≥10 up to ~130 MHz |
| Input Voltage Noise | 1.0 nV/√Hz @ 1 MHz - preserves SNR in low-amplitude sensor signals |
| Slew Rate | 360 V/μs (AV = +20, ±6 V) - supports 2 VPP fast transient response without distortion |
| Output Swing | ±4.8 V into 100 Ω (±6 V supply) - delivers full-rail dynamic range for ADC driver stages |
| Supply Range | ±2.25 V to ±6 V dual supply - compatible with legacy ±5 V and modern ±3.3 V systems |
| CMRR | 95 dB - rejects common-mode interference in differential-sense configurations |
| PSRR | 88 dB - minimizes power-supply ripple coupling into amplified signal path |
Pinout & Package
VSSOP-8 (DBV) package: 3.00 mm × 3.00 mm body, 0.5 mm pitch, exposed thermal pad (not electrically connected), rated for −40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Channel A output - drives load directly; requires local 0.1 μF bypass to V− |
| 2 | IN A− | Inverting input Channel A - connects to feedback network for precision gain setting |
| 3 | IN A+ | Non-inverting input Channel A - high-impedance node; guard trace recommended |
| 4 | V− | Negative supply rail - shared return for both channels; low-inductance ground plane critical |
| 5 | IN B+ | Non-inverting input Channel B - independent of Channel A; no crosstalk below −75 dB |
| 6 | IN B− | Inverting input Channel B - isolated signal path; enables dual-channel synchronous sampling |
| 7 | OUT B | Channel B output - fully symmetrical to OUT A; supports interleaved or parallel architectures |
| 8 | V+ | Positive supply rail - decoupled with 0.1 μF ceramic + 4.7 μF tantalum per channel |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input voltage noise | 1.0 nV/√Hz enables sub-microvolt signal recovery in magnetic tape/disk pre-amps |
| Dual-channel isolation | −75 dB crosstalk at 1 MHz allows simultaneous high-fidelity channel acquisition without interference |
| Stable at |AV| ≥10 | No external compensation required - simplifies layout and reduces component count in gain blocks |
| Wide supply range | Operates from ±2.25 V to ±6 V - supports both low-voltage portable and high-dynamic-range industrial systems |
| High output drive | 100 mA sourcing/sinking per channel - directly drives 100 Ω loads and ADC inputs without buffers |
Applications
| Ultrasound Pre-amplifiers | Instrumentation Sense Amplifiers |
|---|---|
Use Scenario: Amplifying weak RF echo signals (2–15 MHz) from piezoelectric transducers in portable and cart-based diagnostic systems. IC Role / Device Role / Timing Role: Dual-channel low-noise voltage amplifier in analog front-end; each channel conditions one transducer element or group. Use Value: 1.0 nV/√Hz input noise and 1.3 GHz bandwidth preserve time-of-flight resolution and SNR across full imaging bandwidth. | Use Scenario: High-precision measurement of microvolt-level bridge outputs in strain gauge, RTD, or thermopile sensors. IC Role / Device Role / Timing Role: First-stage gain block with matched dual channels for differential sensing and offset cancellation. Use Value: 700 µV max input offset and ±0.2 µV/°C drift ensure stable dc accuracy over temperature without recalibration. |
| Magnetic Tape & Disk Pre-amplifiers | Wide Band Active Filters |
Use Scenario: Recovering high-frequency data waveforms from magnetic read heads in enterprise storage subsystems. IC Role / Device Role / Timing Role: Wideband transimpedance or voltage amplifier in read channel IC interface stage. Use Value: 360 V/μs slew rate and −80 dBc HD3 at 10 MHz enable clean playback of dense, high-speed data patterns. | Use Scenario: Implementing 5th-order elliptic or Chebyshev filters in professional audio and communications baseband paths. IC Role / Device Role / Timing Role: Active filter section using dual op-amp topology (e.g., biquad, state-variable). Use Value: Matched dual channels ensure consistent pole/zero placement; 1.3 GHz GBW supports filter cutoffs up to 100 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual ultra-low-noise op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6626MA/NOPB | Same silicon, SOIC-8 package (4.90 mm × 3.91 mm); RθJA = 166°C/W vs. VSSOP's 166°C/W - identical thermal resistance but larger footprint | Preferred where board space permits and hand-soldering or legacy footprint compatibility is required | Select LMH6626MA/NOPB when SOIC-8 mechanical fit or JEDEC-standard reflow profile is mandated |
| ADA4898-2 | Lower input voltage noise (0.9 nV/√Hz), higher supply current (18 mA/ch vs. 16 mA/ch), ±3.3 V min supply - not rated for ±2.25 V operation | Better suited for precision DC-coupled systems requiring lower drift (±0.1 µV/°C) but less tolerant of low-voltage rails | Choose ADA4898-2 only if system operates ≥±3.3 V and prioritizes ultra-low drift over minimum supply flexibility |
Compared with LMH6626MM, LMH6626MA/NOPB offers identical electrical performance in a larger SOIC package, while ADA4898-2 trades supply voltage range for marginally lower noise and superior dc precision-neither is pin-compatible, requiring PCB redesign.
Availability
LMH6626MM is available at Aetrix Electronics and suitable for ultrasound imaging systems, instrumentation data acquisition, magnetic storage read channels, and wideband active filtering requiring stable component supply across extended temperature ranges.
Supply support for LMH6626MM 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 headquartered in Dallas, Texas, designing and manufacturing analog and embedded processing solutions for industrial, automotive, and communications markets.
The LMH6626MM belongs to TI's high-speed precision amplifier product line, engineered specifically for demanding analog front-ends where ultra-low noise, wide bandwidth, and dual-channel matching are critical in medical, test, and storage applications.
FAQ
What is the maximum operating supply voltage for the LMH6626MM?
The LMH6626MM supports dual-supply operation from ±2.25 V to ±6 V, with absolute maximum ratings of ±6.3 V. Operation beyond ±6 V risks permanent damage. The device also functions in single-supply mode from 5 V to 12 V, making LMH6626MM suitable for both legacy ±5 V systems and modern low-voltage designs.
Does the LMH6626MM require external compensation for stability?
No, the LMH6626MM is internally compensated and stable for closed-loop gains |AV| ≥10 without external components. It does not require a compensation capacitor. However, layout best practices-including short traces, ground-plane shielding, and local 0.1 μF bypass capacitors on V+ and V−-are essential to maintain stability and minimize peaking in high-frequency applications using LMH6626MM.
What is the input offset voltage specification for the LMH6626MM over temperature?
The LMH6626MM has a maximum input offset voltage of ±700 µV over the full operating temperature range (−40°C to +125°C), with typical drift of ±0.2 µV/°C. This ensures predictable dc error behavior in precision gain stages. At 25°C and ±6 V supply, the typical VOS is ±0.1 mV-verified in production testing and documented in the LMH6626MM Electrical Characteristics tables.
Can the LMH6626MM drive a 50 Ω load directly?
The LMH6626MM is specified for 100 Ω loads (±4.8 V swing, ±6 V supply) and can source/sink up to 100 mA per channel. Driving a 50 Ω load is possible but reduces output swing to approximately ±4.3 V and increases thermal stress. For sustained 50 Ω operation, verify junction temperature remains below 150°C using RθJA = 166°C/W and ambient conditions. LMH6626MM is not characterized for continuous 50 Ω drive in the datasheet.
How does the LMH6626MM compare to the LMH6624 in terms of noise and bandwidth?
The LMH6626MM (dual) has slightly lower gain bandwidth (1.3 GHz vs. 1.5 GHz for LMH6624) and marginally higher input voltage noise (1.0 nV/√Hz vs. 0.92 nV/√Hz for LMH6624). Both share identical architecture, offset specs, and supply ranges. LMH6626MM provides two matched, isolated amplifiers in one VSSOP-8 package-ideal for differential or multi-channel systems-whereas LMH6624 is a single-channel SOT-23-5 or SOIC-8 device.
LMH6626MM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMH®
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-VSSOP
LMH6626MM FAQ
1.How can I place an order for LMH6626MM through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6626MM 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 LMH6626MM reliable?
The price and inventory of LMH6626MM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6626MM is usually 5 days.
3.What payment methods are accepted for LMH6626MM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6626MM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6626MM?
LMH6626MM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6626MM 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 LMH6626MM?
For technical support, including LMH6626MM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6626MM requirements.
6.How does Aetrix verify that LMH6626MM is sourced from the original manufacturer or authorized distributors?
All LMH6626MM 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 LMH6626MM meets industry standards.
7.What is the process for return or replacement of LMH6626MM?
All LMH6626MM units undergo pre-shipment inspection (PSI). If there is an issue with LMH6626MM, 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 LMH6626MM part is unused and in its original packaging.
Return procedure for LMH6626MM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMH6626MM Tags
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