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Texas Instruments LMH6622MA/NOPB
- Part No.:
- LMH6622MA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6622MA/NOPB.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:558
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Product details
Overview
LMH6622MA/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 LMH6622MA/NOPB datasheet, LMH6622MA/NOPB pinout, LMH6622MA/NOPB application, or LMH6622MA/NOPB equivalent, key selection criteria include its ±2.5 V to ±6 V dual-supply operation, 90 mA linear output current, stable gain ≥2 configuration, and SOIC-8/VSSOP-8 package compatibility with ADSL/VDSL hybrid coupler topologies.
Technical Context
The LMH6622MA/NOPB employs a voltage-feedback architecture with fully differential input stage design, supporting both inverting and non-inverting configurations. Its internal compensation ensures stability for closed-loop gains of AV ≥2 or AV ≤−1, eliminating need for external compensation in standard DSL preamp circuits.
It integrates matched dual amplifiers on TI's VIP10 process, achieving 160 MHz bandwidth at only 4.3 mA per amplifier. The device maintains >75 dB CMRR up to 100 kHz and −75 dB crosstalk at 1 MHz, critical for simultaneous transmit/receive isolation in full-duplex xDSL systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (AV = +2) | 160 MHz - supports full DMT spectrum (100 kHz–1.1 MHz) with flat gain response for accurate multi-tone signal amplification |
| Input Voltage Noise | 1.6 nV/√Hz - enables sub-−140 dBm/Hz line-referred noise density required by ADSL CPE receiver specifications |
| Slew Rate | 85 V/μs - preserves transient fidelity of high-slew-rate DMT symbols without slewing-induced distortion |
| Supply Current (per amp) | 4.3 mA - allows dual-channel operation within tight power budgets of residential DSL modems |
| Output Swing (RL = 100 Ω) | ±4.6 V - drives ADC inputs directly with headroom for 12-bit+ dynamic range in single-ended configurations |
| Harmonic Distortion (HD2) | −90 dBc @ 1 MHz - meets linearity requirements for >255-tone DMT reception without intermodulation masking |
| Input Common-Mode Range | −4.75 V to +5.7 V - accommodates wide common-mode excursions in transformer-coupled hybrid interfaces |
Pinout & Package
LMH6622MA/NOPB is available in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, with industry-standard lead pitch and thermal profile compatible with automated PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT A (Pin 1) | Channel A output | Drives first-stage ADC input or hybrid summing node; capable of sourcing/sinking 90 mA linearly |
| −IN A (Pin 2) | Channel A inverting input | Primary feedback node in inverting summing configuration used for driver signal cancellation |
| +IN A (Pin 3) | Channel A non-inverting input | Connected to transformer center-tap or bias network; high-impedance (17 MΩ) minimizes loading |
| V− (Pin 4) | Negative supply rail | Accepts −2.5 V to −6 V; supports split-supply operation essential for bipolar signal handling |
| +IN B (Pin 5) | Channel B non-inverting input | Second channel input for differential receive path or independent signal chain |
| −IN B (Pin 6) | Channel B inverting input | Configurable for second hybrid cancellation path or independent gain stage |
| OUT B (Pin 7) | Channel B output | Provides matched performance to OUT A; enables dual-channel DSL or I/Q architectures |
| 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 |
|---|---|
| Ultra-low input voltage noise | 1.6 nV/√Hz at 100 kHz - enables detection of weak upstream DMT tones buried in thermal noise floor |
| High linear output current | 90 mA - drives 100 Ω loads into ADC front ends without clipping or gain compression |
| Wide supply range | ±2.5 V to ±6 V or +5 V to +12 V - supports legacy and next-gen DSL modem power architectures |
| Matched dual-channel performance | Channel-to-channel crosstalk <−75 dB @ 1 MHz - prevents interference between receive and diagnostic paths |
| Stable at AV ≥2 | No external compensation required - simplifies layout and reduces BOM count in cost-sensitive CPE designs |
Applications
| ADSL/VDSL Receive Preamp | Low-Noise Instrumentation Front End |
|---|---|
Use Scenario: Amplifying weak, multi-tone DMT signals (100 kHz–1.1 MHz) from telephone line after hybrid coupler, while rejecting near-end crosstalk and driver leakage. IC Role / Device Role / Timing Role: Dual-channel inverting summing amplifier performing simultaneous signal amplification and transmit-path cancellation in CPE analog front end. Use Value: Achieves −140 dBm/Hz line-referred noise density and >90 dBc harmonic suppression, meeting ITU-T G.992.1 compliance without additional filtering stages. |
Use Scenario: Conditioning low-amplitude sensor outputs (e.g., piezoelectric, strain gauge) in portable test equipment requiring wide bandwidth and minimal added noise. IC Role / Device Role / Timing Role: First-stage preamplifier providing gain and impedance transformation before programmable-gain stage or ADC driver. Use Value: 1.6 nV/√Hz noise floor and 160 MHz bandwidth preserve signal integrity for fast transient measurements up to 30 MHz. |
| Ultrasound Preamp | Active Filter Stage |
Use Scenario: Amplifying weak echo signals (1–15 MHz) from piezoelectric transducers in portable ultrasound systems with strict power constraints. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate gain block placed immediately after transducer interface to maximize SNR before analog beamforming. Use Value: 85 V/μs slew rate handles 10-Vpp pulses at 10 MHz without distortion; 4.3 mA/amp supply current enables battery-operated operation. |
Use Scenario: Implementing high-Q, wide-dynamic-range active filters (e.g., Chebyshev, Bessel) in communications baseband processing where phase linearity and harmonic purity are critical. IC Role / Device Role / Timing Role: Gain-setting element in multiple-feedback or state-variable filter topologies requiring precise AC response control. Use Value: 0.1 dB gain flatness to 30 MHz and −94 dBc HD3 ensure minimal passband ripple and intermodulation in multi-carrier systems. |
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 |
|---|---|---|---|
| LMH6624MA/NOPB | Lower input voltage noise (0.92 nV/√Hz), higher supply current (6.5 mA/amp), same SOIC-8 package | Better suited for ultra-low-noise applications below 10 MHz; less optimal for >100 MHz DMT bandwidth due to higher current-induced thermal drift | Select when noise dominates over power; verify thermal stability in compact DSL modem layouts |
| OPA2350UA/2K5 | Rail-to-rail output swing, lower bandwidth (38 MHz), higher input bias current (0.2 pA vs. 4.7 μA), same SOIC-8 footprint | Preferred for single-supply, low-voltage (<5 V) instrumentation; insufficient bandwidth for full-rate ADSL downstream (1.1 MHz) | Choose only for sub-20 MHz applications where rail-to-rail swing is mandatory and bandwidth is secondary |
Compared with LMH6622MA/NOPB, LMH6624MA/NOPB trades 2.2× higher quiescent power for 43% lower voltage noise - ideal for DC-coupled precision front ends - while OPA2350UA/2K5 sacrifices >4× bandwidth for rail-to-rail operation, limiting use to narrowband sensor interfaces.
Availability
LMH6622MA/NOPB is available at Aetrix Electronics and suitable for xDSL modems, portable ultrasound systems, broadband instrumentation, and active filter designs requiring stable component supply across long production lifecycles.
Supply support for LMH6622MA/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 for communications infrastructure.
The LMH6622MA/NOPB belongs to TI's LMH high-speed amplifier product line, engineered specifically for broadband communication analog front ends where simultaneous low noise, high linearity, and wide bandwidth are non-negotiable.
FAQ
What supply voltage ranges does the LMH6622MA/NOPB support?
The LMH6622MA/NOPB operates from ±2.5 V to ±6 V in dual-supply mode and from +5 V to +12 V in single-supply configuration. This flexibility allows direct integration into legacy ADSL modems using ±5 V rails or newer designs adopting +12 V single-supply architectures. The device maintains specified performance across this full range, including bandwidth and distortion metrics.
Is the LMH6622MA/NOPB stable in unity-gain configuration?
No, the LMH6622MA/NOPB is not unity-gain stable. It requires a minimum closed-loop gain of AV ≥2 (non-inverting) or AV ≤−1 (inverting) for unconditional stability. Attempting AV = +1 will cause peaking or oscillation. For unity-gain applications, consider TI's OPA2350 or OPA1611, which are explicitly designed for AV = 1 stability.
How does the LMH6622MA/NOPB achieve transmit signal cancellation in DSL hybrid circuits?
The LMH6622MA/NOPB implements transmit cancellation via inverting summing amplifier topology: the driver output signal is fed to the inverting input (Pin 2 or Pin 6) through resistor R1, while the line signal enters the non-inverting input (Pin 3 or Pin 5). With R1 = 2×R2, the amplifier subtracts the driver leakage component from the received signal, suppressing near-end crosstalk without external analog switches or DSP.
What is the maximum output current capability of the LMH6622MA/NOPB?
The LMH6622MA/NOPB delivers 90 mA of linear output current per channel, defined as the maximum continuous current it can source or sink while maintaining specified distortion and gain accuracy. This exceeds typical ADSL line driver leakage currents (≤50 mA), ensuring clean cancellation even under worst-case hybrid imbalance conditions without clipping or thermal shutdown.
Does the LMH6622MA/NOPB support single-supply operation with ground-referenced inputs?
Yes, the LMH6622MA/NOPB supports true single-supply operation with inputs referenced to ground. Its input common-mode voltage range extends down to −4.75 V (with V− = 0 V), allowing the non-inverting input to accept 0 V signals when V− is tied to ground and V+ = +5 V to +12 V. Output swing reaches within 1.2 V of ground under 100 Ω load, enabling direct interfacing with single-supply ADCs.
LMH6622MA/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:
- 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-SOIC
LMH6622MA/NOPB FAQ
1.How can I place an order for LMH6622MA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6622MA/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 LMH6622MA/NOPB reliable?
The price and inventory of LMH6622MA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6622MA/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6622MA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6622MA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6622MA/NOPB?
LMH6622MA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6622MA/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 LMH6622MA/NOPB?
For technical support, including LMH6622MA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6622MA/NOPB requirements.
6.How does Aetrix verify that LMH6622MA/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6622MA/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 LMH6622MA/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6622MA/NOPB?
All LMH6622MA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6622MA/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 LMH6622MA/NOPB part is unused and in its original packaging.
Return procedure for LMH6622MA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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