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Texas Instruments LMH6626MM/NOPB
- Part No.:
- LMH6626MM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMH6626MM/NOPB.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:549
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Product details
Overview
LMH6626MM/NOPB 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 350–400 V/μs slew rate at ±6 V supply. It enables high-fidelity signal conditioning in ultrasound pre-amplifiers and magnetic storage read channels where dynamic range and SNR preservation are critical.
For engineers reviewing the LMH6626MM/NOPB datasheet, LMH6626MM/NOPB pinout, LMH6626MM/NOPB application, or LMH6626MM/NOPB equivalent, key selection criteria include its dual-channel VSSOP-8 layout, guaranteed stability for |AV| ≥10 closed-loop gain, low 700 µV max input offset over temperature, and verified crosstalk rejection of −75 dB at 1 MHz-critical for multi-channel precision analog front-ends.
Technical Context
The LMH6626MM/NOPB implements a traditional voltage-feedback topology with balanced differential inputs, enabling precise DC accuracy (±0.1 µV/°C drift) and high open-loop gain (77–81 dB). Its architecture supports both inverting and non-inverting configurations while maintaining stable operation down to unity-gain compensation via internal frequency compensation optimized for ≥10× closed-loop gain.
It operates across ±2.25 V to ±6.3 V dual-supply or 5 V to 12 V single-supply ranges, with rail-to-rail output swing up to ±4.65 V (no load, ±6 V) and 10 mΩ output impedance below 100 kHz-enabling direct driving of 100 Ω loads without external buffering in high-speed data acquisition paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 1.3 GHz - Enables stable closed-loop operation up to 85 MHz (−3 dB BW) at AV = +20 with ±6 V supply. |
| Input Voltage Noise | 1.0 nV/√Hz @ 1 MHz - Preserves SNR in low-level sensor interfaces like ultrasound transducer preamps. |
| Slew Rate | 400 V/μs @ AV = +10, ±6 V - Supports clean 10-MHz, 2-VPP large-signal step response with ≤18 ns settling time (0.1%). |
| Input Offset Voltage | ±0.5 mV max @ 25°C, ±0.7 mV over −40°C to +125°C - Minimizes DC error accumulation in multi-stage amplification chains. |
| Crosstalk Rejection | −75 dB @ 1 MHz - Ensures channel isolation in dual-channel applications such as stereo audio or differential ADC drivers. |
| Supply Current per Channel | 12–16 mA @ ±6 V - Balances high-speed performance with power efficiency in space-constrained instrumentation designs. |
| Output Short-Circuit Current | ±120 mA (sinking/sourcing) - Drives heavy capacitive or resistive loads without latch-up under transient fault conditions. |
Pinout & Package
VSSOP-8 package (3.00 mm × 3.00 mm), thermally enhanced, lead-free, RoHS-compliant surface-mount package optimized for high-frequency PCB layouts with minimal parasitic inductance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - Direct connection to next stage; requires local 0.1-µF bypass capacitor to ground near pin. |
| 2 | IN A− | Inverting input Channel A - High-impedance node; guard ring recommended to minimize leakage and capacitive coupling. |
| 3 | IN A+ | Non-inverting input Channel A - Matched to IN A− for CMRR optimization; avoid routing near noisy digital traces. |
| 4 | V− | Negative supply rail - Shared return path for both amplifiers; connect to low-impedance ground plane with short trace. |
| 5 | IN B− | Inverting input Channel B - Electrically isolated from Channel A except via substrate; maintain ≥5-mm spacing from IN A−. |
| 6 | OUT B | Amplifier B output - Independent output drive capability; decouple separately if driving different load impedances. |
| 7 | IN B+ | Non-inverting input Channel B - Symmetric layout with IN A+ ensures matched AC/DC performance between channels. |
| 8 | V+ | Positive supply rail - Connect to dedicated low-ESR bulk + local ceramic (0.1 µF + 10 µF) bypass network. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input voltage noise | 1.0 nV/√Hz enables detection of sub-microvolt signals in medical ultrasound and tape head preamplifiers. |
| Stable for |AV| ≥10 | Eliminates need for external compensation networks in standard gain-of-10–100 instrumentation amplifier stages. |
| Dual-channel crosstalk rejection | −75 dB at 1 MHz prevents inter-channel interference in simultaneous sampling systems or stereo signal paths. |
| Rail-to-rail output swing | ±4.65 V (no load, ±6 V) maximizes dynamic range into 100 Ω loads without external level-shifting circuitry. |
| Wide supply range | Operates from ±2.25 V to ±6.3 V dual or 5–12 V single supply - supports legacy ±5 V and modern low-voltage industrial rails. |
Applications
| Ultrasound Pre-amplifiers | Magnetic Tape & Disk Pre-amplifiers |
|---|---|
Use Scenario: Amplifying weak, high-frequency echo signals from piezoelectric transducers in portable diagnostic imaging systems. IC Role / Device Role / Timing Role: First-stage low-noise voltage amplifier with gain ≥20, preserving signal integrity before ADC digitization. Use Value: 1.0 nV/√Hz input noise and 85 MHz −3 dB bandwidth at ±6 V ensure >70 dB SNR for 5–15 MHz echo bands. | Use Scenario: Boosting microvolt-level analog readback signals from magnetic storage heads in enterprise tape drives. IC Role / Device Role / Timing Role: Differential line receiver with matched dual channels for noise-cancelling signal recovery. Use Value: −75 dB crosstalk and ±0.7 mV max VOS over temperature reduce baseline drift and inter-track interference. |
| Wide Band Active Filters | Professional Audio Systems |
Use Scenario: Implementing 4th-order Butterworth anti-aliasing filters in 200+ MSPS data acquisition modules. IC Role / Device Role / Timing Role: High-speed op-amp core in Sallen-Key or multiple-feedback topologies with precise pole placement. Use Value: 1.3 GHz GBW and 400 V/μs slew rate support filter corner frequencies up to 40 MHz with <0.1% distortion at 10 MHz. | Use Scenario: Line-level signal conditioning and driver stage in studio-grade microphone preamplifiers and monitor controllers. IC Role / Device Role / Timing Role: Dual-channel gain block handling left/right analog paths with independent DC bias control. Use Value: Low 0.92–1.0 nV/√Hz noise and 87–95 dB CMRR preserve dynamic range and channel separation in 110+ dB SPL environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual ultra-low-noise operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6626MA/NOPB | Same silicon, SOIC-8 package (4.90 mm × 3.91 mm); higher RθJA (166°C/W vs. 235°C/W for VSSOP). | Preferred for through-hole prototyping or legacy board compatibility; less suitable for dense RF layouts. | Select when SOIC footprint is required or thermal dissipation is managed via heatsinking or lower ambient. |
| ADA4898-2 | Lower input voltage noise (0.9 nV/√Hz), wider GBW (290 MHz), but higher supply current (18 mA/ch) and no guaranteed |AV| ≥10 stability. | Better for ultra-low-noise DC-coupled applications; requires external compensation for gains <10. | Choose when absolute lowest noise dominates over gain flexibility and power budget is relaxed. |
Compared with LMH6626MA/NOPB, the LMH6626MM/NOPB offers superior thermal performance in compact layouts and tighter high-frequency phase margin; versus ADA4898-2, it trades marginal noise reduction for guaranteed stability at moderate gains and lower quiescent power-making it optimal for production-ready, space-constrained instrumentation.
Availability
LMH6626MM/NOPB is available at Aetrix Electronics and suitable for ultrasound imaging systems, magnetic storage read channels, wideband active filters, and professional audio equipment requiring stable component supply, full traceability, and long-term industrial lifecycle support.
Supply support for LMH6626MM/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 decades of expertise in high-performance op-amps and signal-chain solutions.
The LMH6626MM/NOPB belongs to TI's LMH high-speed amplifier product line, engineered specifically for demanding wideband, low-noise applications including medical diagnostics, test equipment, and communications infrastructure.
FAQ
What is the maximum operating supply voltage for LMH6626MM/NOPB?
The LMH6626MM/NOPB supports dual-supply operation from ±2.25 V to ±6.3 V and single-supply operation from 5 V to 12 V. Absolute maximum supply voltage (V+ − V−) is 13.2 V. Exceeding these limits risks permanent damage, as confirmed in Section 6.1 of the SNOSA42G datasheet. The LMH6626MM/NOPB must be operated within these bounds to ensure reliability and specified performance.
Does LMH6626MM/NOPB require external compensation for unity-gain stability?
No, the LMH6626MM/NOPB is not unity-gain stable. It is explicitly characterized and guaranteed stable only for closed-loop gains |AV| ≥10, as stated in the Features section and Section 8.1 of the datasheet. Attempting unity-gain or low-gain configurations without external compensation will result in peaking or oscillation. The LMH6626MM/NOPB must be used with minimum gain of 10 to meet its specified bandwidth and distortion performance.
What is the input voltage noise density of LMH6626MM/NOPB at 10 kHz?
The LMH6626MM/NOPB exhibits an input voltage noise density of 0.92–1.0 nV/√Hz across 1 kHz to 100 MHz, per Electrical Characteristics tables (Sections 6.5 and 6.6). At 10 kHz specifically, the value remains flat within this range, confirmed by Figure 1 (Voltage Noise vs. Frequency) in the SNOSA42G datasheet. This consistent low noise makes the LMH6626MM/NOPB suitable for broadband sensor interfaces where mid-band noise dominates system SNR.
Can LMH6626MM/NOPB drive a 50 Ω load directly?
Yes, the LMH6626MM/NOPB can drive a 50 Ω load directly, though with reduced output swing and increased distortion. Its output current capability is ±120 mA (sourcing/sinking), sufficient for ±2.3 V into 50 Ω at room temperature. However, the datasheet specifies performance metrics (e.g., HD2/HD3, settling time) at 100 Ω. For 50 Ω, derating is advised-especially at high frequencies-and layout must minimize trace inductance. The LMH6626MM/NOPB remains functional but requires validation under actual load conditions.
Is LMH6626MM/NOPB pin-compatible with LMH6624?
No, the LMH6626MM/NOPB is not pin-compatible with the LMH6624. The LMH6624 is a single-channel amplifier offered in SOT-23-5 and SOIC-8 packages, while the LMH6626MM/NOPB is a dual-channel device in VSSOP-8. Their pinouts differ fundamentally: LMH6624 uses pins 1–5 for OUT, V−, +IN, −IN, V+, whereas LMH6626MM/NOPB assigns pins 1–8 to OUT A, IN A−, IN A+, V−, IN B−, OUT B, IN B+, V+. Interchanging them requires PCB redesign. The LMH6626MM/NOPB serves distinct dual-channel use cases and cannot substitute for the LMH6624 without layout changes.
LMH6626MM/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:
- 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-VSSOP
LMH6626MM/NOPB FAQ
1.How can I place an order for LMH6626MM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6626MM/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 LMH6626MM/NOPB reliable?
The price and inventory of LMH6626MM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6626MM/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6626MM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6626MM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6626MM/NOPB?
LMH6626MM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6626MM/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 LMH6626MM/NOPB?
For technical support, including LMH6626MM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6626MM/NOPB requirements.
6.How does Aetrix verify that LMH6626MM/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6626MM/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 LMH6626MM/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6626MM/NOPB?
All LMH6626MM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6626MM/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 LMH6626MM/NOPB part is unused and in its original packaging.
Return procedure for LMH6626MM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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