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Texas Instruments LMH6626MMX/NOPB
- Part No.:
- LMH6626MMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMH6626MMX/NOPB.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,430
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Product details
Overview
LMH6626MMX/NOPB from Texas Instruments is a dual-channel ultra-low-noise, wideband voltage-feedback operational amplifier optimized for high-fidelity signal conditioning in demanding analog front-ends. It delivers 1.3 GHz small-signal bandwidth, 0.92 nV/√Hz input voltage noise at 1 MHz, ±0.5 mV max input offset voltage (±6 V supply), 400 V/μs slew rate (AV = +10), and stable operation for closed-loop gains ≥10 - enabling precision low-noise amplification in ultrasound pre-amplifiers and instrumentation sense circuits.
For engineers reviewing the LMH6626MMX/NOPB datasheet, LMH6626MMX/NOPB pinout, LMH6626MMX/NOPB application, or LMH6626MMX/NOPB equivalent, key selection considerations include its dual-channel VSSOP-8 package, differential input stage with 95 dB CMRR, rail-to-rail output swing capability (±4.8 V into 100 Ω at ±6 V), and verified performance across −40°C to +125°C industrial temperature range.
Technical Context
The LMH6626MMX/NOPB implements a traditional voltage-feedback topology with balanced high-impedance inputs, delivering 81 dB open-loop gain and 95 dB common-mode rejection ratio. Its architecture supports both inverting and non-inverting configurations with stable gain ≥10, enabled by internal compensation optimized for 500 Ω feedback networks and 100 Ω loads.
It operates from dual supplies (±2.25 V to ±6.3 V) or single supplies (5 V to 12 V), with supply current of 16 mA per channel at ±6 V. Input referred distortion remains below −63 dBc (HD2) and −80 dBc (HD3) at 10 MHz with 1 VPP output into 100 Ω, confirming suitability for wideband RF and medical imaging signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal BW | 85 MHz at ±6 V (−3 dB, VO = 400 mVPP); enables baseband amplification up to UHF frequencies |
| Input voltage noise | 0.92 nV/√Hz at 1 MHz; critical for preserving SNR in low-level sensor and transducer interfaces |
| Slew rate | 400 V/μs at AV = +10 (±6 V); supports fast transient response in pulse-amplification applications |
| Input offset voltage | ±0.5 mV max (±6 V, TA = 25°C); ensures DC accuracy in precision gain stages without trimming |
| Supply voltage range | ±2.25 V to ±6.3 V dual supply; compatible with standard ±5 V and ±6 V analog rails |
| Output swing | ±4.8 V into 100 Ω (±6 V supply); delivers >95% of rail-to-rail dynamic range for maximum signal headroom |
| CMRR | 95 dB (±6 V, VCM = 0 V); rejects common-mode interference in noisy industrial environments |
Pinout & Package
VSSOP-8 (DBV) package: 3.00 mm × 3.00 mm body, 0.65 mm pitch, thermally enhanced exposed pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Channel A output; drives 100 Ω load to ±4.8 V with <18 ns 0.1% settling time |
| 2 | IN A− | Inverting input for Channel A; high-impedance node requiring matched trace routing |
| 3 | IN A+ | Non-inverting input for Channel A; referenced to system ground or bias network |
| 4 | V− | Negative supply rail; decoupling capacitor required within 1 cm for stability |
| 5 | IN B+ | Non-inverting input for Channel B; independent of Channel A for dual-path designs |
| 6 | IN B− | Inverting input for Channel B; isolated from Channel A to minimize crosstalk (−75 dB @ 1 MHz) |
| 7 | OUT B | Channel B output; identical AC/DC specs to OUT A; supports independent gain configuration |
| 8 | V+ | Positive supply rail; connects to +6 V (or +12 V single-supply); requires local 0.1 μF ceramic bypass |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input voltage noise | 0.92 nV/√Hz enables sub-microvolt signal recovery in magnetic tape/disk pre-amplifiers |
| Dual-channel isolation | −75 dB crosstalk at 1 MHz allows simultaneous high-gain amplification of two independent sensors |
| Stable for |AV| ≥10 | Eliminates need for external compensation in fixed-gain instrumentation blocks |
| Wide supply range | Operates from ±2.25 V to ±6.3 V, supporting legacy ±5 V systems and modern low-voltage designs |
| High-speed settling | 18 ns to 0.1% for 2 VPP step ensures fidelity in pulsed ultrasound beamforming |
Applications
| Ultrasound Pre-amplifiers | Instrumentation Sense Amplifiers |
|---|---|
Use Scenario: Amplifying weak echo signals from piezoelectric transducers in portable and diagnostic ultrasound systems. IC Role / Device Role / Timing Role: First-stage low-noise voltage amplifier in analog front-end (AFE), preserving signal integrity before ADC sampling. Use Value: 0.92 nV/√Hz input noise and 85 MHz bandwidth maintain SNR across 1–15 MHz imaging bands. |
Use Scenario: High-precision measurement of low-level bridge sensor outputs in strain gauge or pressure transducers. IC Role / Device Role / Timing Role: Differential gain stage converting microvolt-level differential signals to robust single-ended outputs. Use Value: ±0.5 mV max VOS and 95 dB CMRR reject thermal drift and EMI in industrial test equipment. |
| Magnetic Tape & Disk Pre-amps | Wide Band Active Filters |
Use Scenario: Recovering high-frequency analog waveforms from magnetic storage read heads with minimal added noise. IC Role / Device Role / Timing Role: Low-noise, wideband transimpedance or voltage amplifier in playback channel signal path. Use Value: 1.3 GHz gain-bandwidth product supports flat frequency response up to 50 MHz readback signals. |
Use Scenario: Implementing 4th-order Butterworth or Chebyshev filters in professional audio and communications systems. IC Role / Device Role / Timing Role: Active filter building block in multi-stage topology, configured as Sallen-Key or MFB sections. Use Value: Stable operation at AV ≥10 and 400 V/μs slew rate prevent phase distortion and slew-induced harmonic generation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel ultra-low-noise op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6626MA/NOPB | SOIC-8 package (4.90 mm × 3.91 mm); 166 °C/W RθJA vs. VSSOP's 235 °C/W; same electrical specs | Better thermal dissipation in high-power-density PCB layouts; larger footprint limits space-constrained designs | Select LMH6626MA/NOPB when board area permits and thermal margin is critical; LMH6626MMX/NOPB preferred for miniaturized systems |
| OPA211AIDGKT | Lower noise (1.1 nV/√Hz), lower supply current (3.6 mA/ch), but narrower BW (45 MHz); rail-to-rail output | Superior power efficiency and DC precision for battery-powered instrumentation; insufficient BW for >20 MHz ultrasound | Choose OPA211AIDGKT for low-power, DC-critical applications; LMH6626MMX/NOPB remains optimal for wideband, low-noise signal chains |
Compared with LMH6626MA/NOPB, LMH6626MMX/NOPB trades thermal performance for 55% smaller PCB area; versus OPA211AIDGKT, it delivers 1.9× higher bandwidth at the cost of 4.4× higher supply current - making it uniquely suited for high-frequency, low-noise dual-channel amplification where size and speed dominate.
Availability
LMH6626MMX/NOPB is available at Aetrix Electronics and suitable for ultrasound pre-amplifiers, instrumentation sense amplifiers, and wideband active filters requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LMH6626MMX/NOPB 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 over 90 years of innovation in high-performance analog ICs.
The LMH6626MMX/NOPB belongs to TI's high-speed precision op-amp product line, engineered specifically for ultra-low-noise, wideband signal acquisition in medical imaging, test equipment, and communications infrastructure.
FAQ
What is the maximum operating temperature range for the LMH6626MMX/NOPB?
The LMH6626MMX/NOPB is specified for continuous operation from −40°C to +125°C ambient temperature. This extended industrial temperature range is validated across all key parameters including input offset voltage, CMRR, and small-signal bandwidth, ensuring reliability in harsh environments such as medical diagnostic equipment enclosures and industrial control cabinets where the LMH6626MMX/NOPB is commonly deployed.
Does the LMH6626MMX/NOPB require external compensation for unity-gain stability?
No, the LMH6626MMX/NOPB is not unity-gain stable. It is explicitly designed for stable operation only at closed-loop gains of |AV| ≥10, as confirmed in the datasheet's "Stable for Closed Loop |AV| ≥10" feature and Figure 45–46 showing peaking at lower gains. Using LMH6626MMX/NOPB at AV = 1 will result in oscillation; for unity-gain applications, consider TI's OPA656 or similar fully compensated alternatives.
What is the recommended power supply decoupling for the LMH6626MMX/NOPB in VSSOP-8 package?
TI recommends placing a 0.1 μF X7R ceramic capacitor between each supply pin (V+ and V−) and ground, located within 1 cm of the LMH6626MMX/NOPB package. For high-current or high-frequency layouts, add a 4.7 μF tantalum or ceramic bulk capacitor near the supply entry point. The exposed thermal pad on the VSSOP-8 package must be soldered to a solid ground plane but left electrically floating per datasheet guidance.
How does the LMH6626MMX/NOPB perform in single-supply operation?
The LMH6626MMX/NOPB supports single-supply operation from 5 V to 12 V, with input common-mode range extending to within 0.5 V of the negative rail and output swing to within 1.2 V of either rail (e.g., 0.8 V to 4.2 V on 5 V supply). Its input stage remains functional with VCM = −0.5 V to +5.25 V at ±6 V supply, enabling flexible biasing in single-ended signal paths while retaining full LMH6626MMX/NOPB performance specifications.
Is the LMH6626MMX/NOPB pin-compatible with other dual op-amps in VSSOP-8 package?
No, the LMH6626MMX/NOPB has a proprietary pinout optimized for dual-channel symmetry and layout isolation: pins 1/7 = outputs, 2/6 = inverting inputs, 3/5 = non-inverting inputs, 4/8 = supplies. It is not pin-compatible with industry-standard dual op-amps like TLV2462 or OPA2350. Layout reuse requires verification against the LMH6626MMX/NOPB-specific pin mapping shown in Section 5 of the SNOSA42G datasheet.
LMH6626MMX/NOPB 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
LMH6626MMX/NOPB FAQ
1.How can I place an order for LMH6626MMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6626MMX/NOPB 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 LMH6626MMX/NOPB reliable?
The price and inventory of LMH6626MMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6626MMX/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6626MMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6626MMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6626MMX/NOPB?
LMH6626MMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6626MMX/NOPB 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 LMH6626MMX/NOPB?
For technical support, including LMH6626MMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6626MMX/NOPB requirements.
6.How does Aetrix verify that LMH6626MMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6626MMX/NOPB 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 LMH6626MMX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6626MMX/NOPB?
All LMH6626MMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6626MMX/NOPB, 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 LMH6626MMX/NOPB part is unused and in its original packaging.
Return procedure for LMH6626MMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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