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Texas Instruments LMH6626MA/NOPB
- Part No.:
- LMH6626MA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6626MA/NOPB.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:297
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Product details
Overview
LMH6626MA/NOPB from Texas Instruments is a dual ultra-low-noise, wideband voltage-feedback operational amplifier designed for high-fidelity signal conditioning in precision analog front-ends. It delivers 1.3 GHz gain bandwidth, 0.92 nV/√Hz input voltage noise, and ±0.1 mV input offset voltage (typ), enabling high-gain (>10) closed-loop configurations in ultrasound pre-amplifiers and instrumentation sense circuits.
For engineers reviewing the LMH6626MA/NOPB datasheet, LMH6626MA/NOPB pinout, LMH6626MA/NOPB application, or LMH6626MA/NOPB equivalent, key selection criteria include its dual-channel VSSOP-8 package, 350 V/μs slew rate at AV = +20, −80 dBc HD3 at 10 MHz, and stable operation with |AV| ≥10 - critical for low-distortion wideband amplification in medical and test equipment.
Technical Context
The LMH6626MA/NOPB implements a traditional voltage-feedback topology with balanced differential inputs, delivering 81 dB open-loop gain and 95 dB CMRR. Its architecture supports both inverting and non-inverting configurations with minimal phase shift up to 100 MHz, enabling accurate pulse response in time-critical applications like magnetic tape playback and optical receiver front-ends.
It operates across ±2.5 V to ±6 V dual supplies or 5 V to 12 V single supply, with thermal resistance RθJA = 166 °C/W (VSSOP-8). Input stage design achieves 2.3 pA/√Hz current noise and 0.92 nV/√Hz voltage noise at 1 MHz, optimized for low-source-impedance sensor interfaces where voltage noise dominates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth | 1.3 GHz - enables stable closed-loop gains ≥10 up to ~130 MHz (e.g., AV = +100 usable to ~13 MHz) |
| Input Voltage Noise | 0.92 nV/√Hz @ 1 MHz - critical for preserving SNR in low-level signal amplification (e.g., piezoelectric ultrasound transducers) |
| Slew Rate | 350 V/μs @ AV = +20 - supports full-scale 2 VPP output at ≤175 MHz without slewing distortion |
| HD3 @ 10 MHz | −80 dBc @ RL = 100 Ω - ensures minimal third-harmonic contamination in wideband RF/IF signal chains |
| Supply Range | ±2.5 V to ±6 V dual or 5 V to 12 V single - accommodates legacy ±5 V systems and modern low-voltage embedded designs |
| Input Offset Voltage | ±0.5 mV max (−40°C to +125°C) - maintains DC accuracy in multi-stage gain blocks without excessive trimming |
| Crosstalk Rejection | −75 dB @ 1 MHz - isolates Channel A and B signals in dual-path architectures (e.g., I/Q demodulators) |
Pinout & Package
VSSOP-8 package (3.00 mm × 3.00 mm), thermally enhanced for high-speed operation with exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Channel A output - drives 100 Ω loads to ±4.9 V swing (±6 V supply); requires 10 Ω series isolation for capacitive loads |
| 2 | IN A− | Inverting input Channel A - high-impedance node; matched layout critical to minimize common-mode error |
| 3 | IN A+ | Non-inverting input Channel A - referenced to system ground or bias network; input capacitance = 2.0 pF (diff) |
| 4 | V− | Negative supply rail - decoupling capacitor (0.1 μF ceramic) required within 5 mm of pin for stability |
| 5 | IN B+ | Non-inverting input Channel B - independent of Channel A; enables true dual-path signal processing |
| 6 | IN B− | Inverting input Channel B - isolated routing prevents crosstalk; shares V− and V+ with Channel A |
| 7 | OUT B | Channel B output - identical AC/DC specs to OUT A; allows synchronous dual-channel acquisition |
| 8 | V+ | Positive supply rail - supplies both channels; total IS = 16 mA (per channel) at ±6 V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low voltage noise | 0.92 nV/√Hz enables <10 nV RMS integrated noise in 10–100 MHz bandwidths - essential for detecting weak acoustic signals |
| Stable for |AV| ≥10 | Eliminates need for external compensation in standard gain configurations, reducing BOM count and layout complexity |
| Dual-channel isolation | −75 dB crosstalk at 1 MHz ensures independent operation of Channel A/B in I/Q or differential pair applications |
| Wide supply range | Operates from ±2.5 V to ±6 V - supports battery-powered portable ultrasound and industrial 5 V systems without level-shifting |
| High slew rate | 350 V/μs sustains 2 VPP output at 175 MHz - preserves fast edge integrity in pulse-echo timing circuits |
Applications
| Ultrasound Pre-amplifiers | Instrumentation Sense Amplifiers |
|---|---|
Use Scenario: Amplifying low-amplitude, high-frequency echo signals from piezoelectric transducers in portable diagnostic scanners. IC Role / Device Role / Timing Role: First-stage low-noise voltage amplifier in analog front-end; sets system noise floor and dynamic range. Use Value: 0.92 nV/√Hz input noise directly improves signal-to-noise ratio by >6 dB versus 1.5 nV/√Hz alternatives, extending detectable tissue depth. | Use Scenario: Conditioning microvolt-level bridge sensor outputs in precision weigh scales and strain gauge systems. IC Role / Device Role / Timing Role: Low-drift, high-gain instrumentation amplifier core (with external resistors) for DC-coupled measurement paths. Use Value: ±0.5 mV max input offset over temperature minimizes calibration drift, reducing recalibration frequency in field-deployed equipment. |
| Magnetic Tape Playback | Professional Audio Systems |
Use Scenario: Recovering high-frequency audio content from analog magnetic tape heads with inherent high source impedance. IC Role / Device Role / Timing Role: Wideband, low-noise preamp compensating for tape head inductance roll-off above 10 kHz. Use Value: 1.3 GHz GBW enables flat frequency response to 50 kHz with AV = +100, preserving harmonic detail in archival restoration. | Use Scenario: Driving ADC inputs in 24-bit, 192 kHz studio audio interfaces requiring ultra-low THD+N. IC Role / Device Role / Timing Role: Final gain stage before anti-aliasing filter and ADC; defines system linearity and noise floor. Use Value: −80 dBc HD3 at 10 MHz ensures <0.01% THD at 20 kHz full-scale, meeting EBU R68 broadcast standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual wideband op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6626MM/NOPB | VSSOP-8 package identical; same electrical specs - only marking and reel packaging differ | No functional difference; used interchangeably in production | Select LMH6626MM/NOPB for tape-and-reel delivery; LMH6626MA/NOPB for tube packaging |
| ADA4898-2 | Lower voltage noise (0.9 nV/√Hz), higher supply current (18 mA/ch), no guaranteed |AV| ≥10 stability | Requires external compensation for AV < 20; better for ultra-low-noise DC-coupled apps, not pulse-response-critical | Choose ADA4898-2 only when sub-0.92 nV/√Hz noise is mandatory and slew rate >350 V/μs is unnecessary |
Compared with LMH6626MA/NOPB, LMH6626MM/NOPB offers identical performance in alternate packaging, while ADA4898-2 trades guaranteed high-gain stability for marginally lower noise and higher quiescent power - making LMH6626MA/NOPB optimal for time-domain fidelity in ultrasound and tape playback.
Availability
LMH6626MA/NOPB 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's extended product lifecycle support.
Supply support for LMH6626MA/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 company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 50 years of op-amp design leadership.
The LMH6626MA/NOPB belongs to TI's LMH high-speed amplifier family, engineered specifically for wideband, low-noise signal acquisition in medical imaging, test equipment, and communications infrastructure where preserving transient fidelity and SNR is paramount.
FAQ
What is the maximum stable closed-loop gain for LMH6626MA/NOPB?
The LMH6626MA/NOPB is specified as stable for closed-loop gains |AV| ≥10 in both inverting and non-inverting configurations. This is verified across temperature and supply ranges per the datasheet's "Stable for Closed Loop |AV| ≥10" feature statement and Figure 45–46 showing peaking suppression at RF ≥ 511 Ω. Gains below 10 require external compensation.
Does LMH6626MA/NOPB support single-supply operation?
Yes, LMH6626MA/NOPB operates from 5 V to 12 V single supply, with input common-mode range extending to −0.5 V and output swing to within 1.25 V of rails (at ±6 V dual supply, ±4.65 V no-load). For single-supply use, bias the inputs near mid-rail using resistor dividers and ensure output load does not violate headroom limits.
What is the thermal resistance (RθJA) of LMH6626MA/NOPB in its VSSOP-8 package?
The LMH6626MA/NOPB in VSSOP-8 (package DBV) has a junction-to-ambient thermal resistance RθJA of 166 °C/W, as confirmed in Section 6.4 "Thermal Information" of the SNOSA42G datasheet. This value assumes standard JEDEC PCB mounting with two-layer copper; actual thermal performance improves with additional copper pour and thermal vias.
How does LMH6626MA/NOPB compare to LMH6624 in noise performance?
LMH6626MA/NOPB specifies 0.92 nV/√Hz input voltage noise (typ) at 1 MHz, identical to LMH6624 per Sections 6.5 and 6.6. Both share the same core amplifier topology; the dual-channel LMH6626MA/NOPB achieves matching noise performance per channel without cross-coupling degradation, validated by −75 dB crosstalk rejection at 1 MHz.
Is LMH6626MA/NOPB pin-compatible with any industry-standard dual op-amps?
No - LMH6626MA/NOPB uses a custom VSSOP-8 pinout (IN A−, IN A+, V−, IN B+, IN B−, OUT B, V+, OUT A) that differs from standard dual op-amp layouts (e.g., SOIC-8 pin 1 = OUT A, pin 2 = IN− A). Direct replacement requires PCB redesign; it is not pin-compatible with OPA2691, AD8000, or THS3202.
LMH6626MA/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMH®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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/NOPB FAQ
1.How can I place an order for LMH6626MA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6626MA/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 LMH6626MA/NOPB reliable?
The price and inventory of LMH6626MA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6626MA/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6626MA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6626MA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6626MA/NOPB?
LMH6626MA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6626MA/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 LMH6626MA/NOPB?
For technical support, including LMH6626MA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6626MA/NOPB requirements.
6.How does Aetrix verify that LMH6626MA/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6626MA/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 LMH6626MA/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6626MA/NOPB?
All LMH6626MA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6626MA/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 LMH6626MA/NOPB part is unused and in its original packaging.
Return procedure for LMH6626MA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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