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Texas Instruments LMH6622MMX/NOPB
- Part No.:
- LMH6622MMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMH6622MMX/NOPB.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,342
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Product details
Overview
LMH6622MMX/NOPB from Texas Instruments is a dual wideband, low-noise voltage-feedback operational amplifier optimized for DSL receive pre-amplification. It delivers 160 MHz bandwidth (AV = +2), 1.6 nV/√Hz input voltage noise, 85 V/μs slew rate, and −90 dBc 2nd harmonic distortion at 1 MHz - enabling high-fidelity signal recovery in xDSL analog front ends.
For engineers reviewing the LMH6622MMX/NOPB datasheet, LMH6622MMX/NOPB pinout, LMH6622MMX/NOPB application, or LMH6622MMX/NOPB equivalent, key selection criteria include its ±2.5 V to ±6 V / +5 V to +12 V supply flexibility, dual-channel isolation for hybrid coupler implementation, and guaranteed stability at AV ≥ 2 or AV ≤ −1 - critical for noise-sensitive receive-path designs.
Technical Context
The LMH6622MMX/NOPB employs a voltage-feedback architecture with fully differential input stage and rail-to-rail output drive capability. Its VIP10 process enables simultaneous high bandwidth (160 MHz) and ultra-low noise (1.6 nV/√Hz) while consuming only 4.3 mA per amplifier.
It supports both single-supply (+5 V to +12 V) and split-supply (±2.5 V to ±6 V) operation, with input common-mode range extending from −4.75 V to +5.7 V (±6 V supply) and output swing of ±4.6 V into 100 Ω - making it suitable for direct interfacing with ADC drivers in full-duplex DSL systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (AV = +2) | 160 MHz - supports full-rate ADSL/VDSL DMT tones up to 1.1 MHz with ample gain margin |
| Input Voltage Noise | 1.6 nV/√Hz at 100 kHz - enables sub-−140 dBm/Hz line-referred noise density in CPE receive band |
| Slew Rate | 85 V/μs - preserves large-signal integrity for multi-tone burst transients without slewing distortion |
| Supply Current (per amp) | 4.3 mA - allows dual-channel operation under 9 mA total, compatible with power-constrained CPE designs |
| Harmonic Distortion (HD2) | −90 dBc at 1 MHz, RL = 100 Ω - meets stringent linearity requirements for 255-tone DMT decoding |
| Output Swing (RL = 100 Ω) | ±4.6 V - drives ADC inputs directly without level-shifting, minimizing component count in AFE |
| Input Common-Mode Range | −4.75 V to +5.7 V (±6 V) - accommodates transformer-coupled telephone line signals with DC bias flexibility |
Pinout & Package
LMH6622MMX/NOPB is packaged in an 8-pin VSSOP (DGK) with 3.00 mm × 3.00 mm body size, optimized for space-constrained DSL modem PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT A (Pin 1) | Channel A output | Drives first receive path or hybrid summing node; capable of sourcing/sinking 90 mA |
| −IN A (Pin 2) | Channel A inverting input | Primary summing node for driver cancellation in hybrid coupler configuration |
| +IN A (Pin 3) | Channel A non-inverting input | Connected to line-side transformer center-tap or bias network for common-mode stabilization |
| V− (Pin 4) | Negative supply rail | Accepts −2.5 V to −6 V (dual) or ground (single-supply); decoupling required within 1 cm |
| +IN B (Pin 5) | Channel B non-inverting input | Second receive channel reference; isolated from Channel A to prevent crosstalk (>75 dB @ 1 MHz) |
| −IN B (Pin 6) | Channel B inverting input | Independent summing node for secondary receive path or differential pair implementation |
| OUT B (Pin 7) | Channel B output | Drives second ADC channel or balanced output stage; matched AC performance to OUT A |
| V+ (Pin 8) | Positive supply rail | Accepts +2.5 V to +6 V (dual) or +5 V to +12 V (single); PSRR > 74 dB reduces supply noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel isolation | −75 dB crosstalk at 1 MHz ensures independent operation of two receive paths without interference |
| Low-noise + high-linearity co-optimization | 1.6 nV/√Hz voltage noise and −90 dBc HD2 enable simultaneous noise floor suppression and multi-tone fidelity |
| Hybrid coupler integration | Stable at AV ≥ 2 or AV ≤ −1, supporting inverting summing configurations that cancel driver leakage in real time |
| Wide supply range | Operates from ±2.5 V to ±6 V or +5 V to +12 V - eliminates need for dedicated LDOs in legacy and new CPE designs |
| Robust output drive | 90 mA linear output current into 100 Ω maintains signal integrity driving ADC input capacitance and trace impedance |
Applications
| ADSL/VDSL Receive Preamp | Ultrasound Signal Conditioning |
|---|---|
Use Scenario: Amplifying weak, multi-tone DMT signals (26 kHz–1.1 MHz) from twisted-pair telephone lines in CPE modems while rejecting near-end crosstalk and driver leakage. IC Role / Device Role / Timing Role: Dual-channel receive preamplifier performing simultaneous gain setting and active hybrid cancellation in analog front end. Use Value: Enables compliance with ADSL standard's −140 dBm/Hz noise density requirement and >90 dBc harmonic distortion limit across full receive band. |
Use Scenario: Boosting low-amplitude echo return signals from piezoelectric transducers in portable ultrasound systems with minimal added noise. IC Role / Device Role / Timing Role: Low-noise, wideband gain block in time-gain compensation (TGC) chain prior to ADC sampling. Use Value: 1.6 nV/√Hz input noise and 160 MHz bandwidth preserve high-frequency tissue resolution without degrading SNR in 5–15 MHz imaging bands. |
| Low-Noise Instrumentation Front End | Active Filter Stage |
Use Scenario: Amplifying microvolt-level sensor outputs (e.g., strain gauges, thermopiles) in industrial data acquisition systems where EMI immunity and DC precision are critical. IC Role / Device Role / Timing Role: First-stage gain element with rail-to-rail output swing and 75 dB CMRR to reject common-mode interference on long sensor cables. Use Value: Input offset drift <2.5 μV/°C and 17 MΩ common-mode input resistance minimize thermal and loading errors in high-impedance sensor interfaces. |
Use Scenario: Implementing high-Q, low-distortion active filters (e.g., Butterworth, Chebyshev) for anti-aliasing or channel selection in communications receivers. IC Role / Device Role / Timing Role: Gain-setting and buffering stage in multiple-feedback or state-variable filter topologies. Use Value: 0.1 dB gain flatness up to 30 MHz (±6 V) ensures phase coherence and amplitude accuracy across filter passband without peaking or roll-off artifacts. |
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 |
|---|---|---|---|
| LMH6624MMX/NOPB | Lower input voltage noise (0.9 nV/√Hz), higher supply current (6.5 mA/amp), narrower bandwidth (1.5 GHz GBW but lower usable small-signal BW at high gains) | Better suited for ultra-low-noise DC-coupled instrumentation; less optimal for high-slew, wide-dynamic-range DSL receive due to higher quiescent power | Select LMH6624MMX/NOPB only when voltage noise dominates system budget and power is not constrained. |
| OPA2691U | Higher slew rate (1000 V/μs), wider bandwidth (300 MHz), but higher input noise (2.1 nV/√Hz) and no guaranteed stability at AV = +2 | Preferred for video or RF IF amplification; requires external compensation for unity-gain stable use, increasing design complexity in DSL AFE | Choose OPA2691U only for applications demanding extreme speed over noise, with full layout and compensation validation. |
Compared with LMH6622MMX/NOPB, LMH6624MMX/NOPB trades power efficiency for deeper noise floor, while OPA2691U sacrifices noise performance for raw speed - neither offers the same balanced combination of 160 MHz bandwidth, 1.6 nV/√Hz noise, and AV ≥ 2 stability required for drop-in DSL preamp deployment.
Availability
LMH6622MMX/NOPB is available at Aetrix Electronics and suitable for xDSL modems, ultrasound front ends, and low-noise instrumentation requiring stable component supply, consistent parametric performance, and long-term obsolescence management.
Supply support for LMH6622MMX/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-speed amplifier design and broadband communication solutions.
The LMH6622MMX/NOPB belongs to TI's LMH high-speed op-amp family, engineered specifically for broadband communications infrastructure - emphasizing low noise, high linearity, and robust stability in DSL, CATV, and medical signal-chain applications.
FAQ
What supply voltage ranges does the LMH6622MMX/NOPB support?
The LMH6622MMX/NOPB operates from ±2.5 V to ±6 V in dual-supply mode and from +5 V to +12 V in single-supply configuration. At ±6 V, it delivers full 160 MHz bandwidth and ±4.6 V output swing into 100 Ω; at ±2.5 V, bandwidth reduces to 150 MHz with ±1.2 V swing - all specifications are tested and guaranteed across these ranges per the official datasheet.
Is the LMH6622MMX/NOPB stable at unity gain?
No, the LMH6622MMX/NOPB is not unity-gain stable. It is specified for stable operation only at closed-loop gains of AV ≥ +2 or AV ≤ −1. Attempting AV = +1 will cause peaking or oscillation. For unity-gain applications, TI recommends alternatives like the OPA2350 or LMH6642, which are explicitly unity-gain compensated.
How does the LMH6622MMX/NOPB achieve hybrid coupler functionality in DSL designs?
The LMH6622MMX/NOPB implements active hybrid cancellation by configuring one amplifier as an inverting summing node: the telephone line signal enters the non-inverting input (+IN A), while the transmit driver feedback is injected into the inverting input (−IN A). With precise resistor matching (e.g., R1 = 2×R2), the LMH6622MMX/NOPB cancels near-end leakage in real time - eliminating need for discrete passive hybrids.
What is the maximum output current capability of the LMH6622MMX/NOPB?
The LMH6622MMX/NOPB delivers a linear output current of ±90 mA into resistive loads. Short-circuit current is rated at ±135 mA (sourcing) and ±130 mA (sinking) under ±6 V supply, with momentary test conditions. Continuous operation above ±90 mA risks thermal shutdown or distortion - design must ensure load impedance stays ≥ 50 Ω for full swing.
Does the LMH6622MMX/NOPB support single-supply operation with rail-to-rail input?
The LMH6622MMX/NOPB supports single-supply operation from +5 V to +12 V, but its input common-mode range does not extend to the negative rail (V− or ground). At +5 V supply, the input common-mode range is −1.25 V to +2.2 V - meaning it requires a DC bias (e.g., VCM = +2.5 V) for AC-coupled signals. It is not a rail-to-rail input op-amp.
LMH6622MMX/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:
- Differential
- Slew Rate:
- 85V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 160 MHz
- Current - Input Bias:
- 4.7 µA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 4.3mA (x2 Channels)
- Current - Output / Channel:
- 90 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
LMH6622MMX/NOPB FAQ
1.How can I place an order for LMH6622MMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6622MMX/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 LMH6622MMX/NOPB reliable?
The price and inventory of LMH6622MMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6622MMX/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6622MMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6622MMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6622MMX/NOPB?
LMH6622MMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6622MMX/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 LMH6622MMX/NOPB?
For technical support, including LMH6622MMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6622MMX/NOPB requirements.
6.How does Aetrix verify that LMH6622MMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6622MMX/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 LMH6622MMX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6622MMX/NOPB?
All LMH6622MMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6622MMX/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 LMH6622MMX/NOPB part is unused and in its original packaging.
Return procedure for LMH6622MMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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