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Texas Instruments LMH6622MM/NOPB
- Part No.:
- LMH6622MM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMH6622MM/NOPB.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,694
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Product details
Overview
LMH6622MM/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, 90 dBc harmonic distortion at 1 MHz, ±4.6 V output swing into 100 Ω, and operates from ±2.5 V to ±6 V or +5 V to +12 V supplies - enabling high-fidelity signal conditioning in xDSL analog front ends.
For engineers reviewing the LMH6622MM/NOPB datasheet, LMH6622MM/NOPB pinout, LMH6622MM/NOPB application, or LMH6622MM/NOPB equivalent, key selection criteria include its dual-channel low-noise architecture, stability at AV ≥2 or AV ≤−1, linear output current of 90 mA, MTPR performance in ADSL upstream/downstream bands, and compatibility with SOIC-8 and VSSOP-8 PCB footprints.
Technical Context
The LMH6622MM/NOPB employs a voltage-feedback topology 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 maintaining excellent linearity (HD2/HD3 >90 dBc) across 100 kHz–1.1 MHz receive bands required by ADSL/VDSL standards.
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 CMRR ≥75 dB. The device is internally compensated for unity-gain stable operation only when configured with AV ≥2 or AV ≤−1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (AV = +2) | 160 MHz - ensures full DMT tone fidelity across ADSL downstream band (up to 1.1 MHz) with ample gain margin |
| Input Voltage Noise | 1.6 nV/√Hz @ 100 kHz - critical for meeting −140 dBm/Hz line-referred noise requirement in CPE receivers |
| Slew Rate | 85 V/μs - supports fast transient response for multi-tone QAM signals without slewing-induced distortion |
| Supply Current per Amp | 4.3 mA - enables dual-channel amplification within tight power budgets of modem analog front ends |
| Output Swing (RL = 100 Ω) | ±4.6 V - drives ADC inputs directly with headroom for 12-bit+ dynamic range in DSL chipsets |
| Harmonic Distortion | 90 dBc (HD2/HD3) @ 1 MHz - preserves signal integrity during full-rate DMT reception with minimal intermodulation |
| Multitone Power Ratio | −78 dBc (upstream), −70 dBc (downstream) - quantifies in-band spurious generation under real ADSL loading |
Pinout & Package
LMH6622MM/NOPB is available in 8-pin VSSOP (DGK) package, measuring 3.00 mm × 3.00 mm with 0.65 mm lead pitch. This compact footprint supports high-density DSL line card layouts while maintaining thermal performance via exposed pad (though not electrically connected in standard DGK variant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT A (Pin 1) | Channel A output | Drives first receive path (e.g., ADC channel A or hybrid summing node) |
| −IN A (Pin 2) | Channel A inverting input | Accepts inverted signal from transformer secondary or feedback network |
| +IN A (Pin 3) | Channel A non-inverting input | Bias reference or ground-referenced signal path; sets common-mode operating point |
| V− (Pin 4) | Negative supply rail | Connects to −2.5 V to −6 V or ground in single-supply mode; decoupling required |
| +IN B (Pin 5) | Channel B non-inverting input | Second receive channel reference; independent biasing enables differential pair configuration |
| −IN B (Pin 6) | Channel B inverting input | Receives second transformer-coupled signal; used for dual-line or diversity reception |
| OUT B (Pin 7) | Channel B output | Drives second ADC channel or complementary hybrid cancellation path |
| V+ (Pin 8) | Positive supply rail | Connects to +2.5 V to +6 V or +5 V to +12 V; requires local 0.1 μF ceramic bypass |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel low-noise architecture | Enables independent receive-path amplification for two DSL lines or I/Q signal paths without crosstalk degradation (−75 dB @ 1 MHz) |
| Wide supply range support | Operates from ±2.5 V to ±6 V or +5 V to +12 V - simplifies integration into legacy and next-gen CPE power domains |
| High linear output current | 90 mA sourcing/sinking capability drives 100 Ω loads directly, eliminating need for external buffers in ADC driver stages |
| Stable at AV ≥2 or AV ≤−1 | Eliminates external compensation components in standard non-inverting/inverting configurations for DSL gain blocks |
| Excellent MTPR performance | −78 dBc upstream / −70 dBc downstream meets full-rate ADSL spectral mask requirements under real-world line conditions |
Applications
| xDSL Receiver Pre-Amplifier | Ultrasound Signal Conditioning |
|---|---|
|
Use Scenario: Amplifying weak, multi-tone DMT signals (100 kHz–1.1 MHz) from telephone line hybrid couplers in ADSL/VDSL CPE modems. IC Role / Device Role / Timing Role: Dual-channel receive pre-amplifier performing gain, noise-limited signal conditioning, and driver leakage cancellation in analog front end. Use Value: 1.6 nV/√Hz noise floor and 90 dBc linearity ensure compliance with ITU-T G.992.1 noise density and distortion limits for full-rate operation. |
Use Scenario: Boosting low-amplitude echo return signals from piezoelectric transducers in portable ultrasound systems. IC Role / Device Role / Timing Role: Low-noise, wideband gain stage preceding anti-alias filtering and digitization in beamforming chains. Use Value: 160 MHz bandwidth preserves pulse fidelity of 5–15 MHz transducer outputs; 85 V/μs slew rate prevents edge rounding in time-of-flight measurements. |
| Low-Noise Instrumentation Front End | Active Filter Building Block |
|
Use Scenario: First-stage amplification in precision data acquisition systems measuring microvolt-level sensor outputs (e.g., strain gauges, thermopiles). IC Role / Device Role / Timing Role: High-CMRR, low-drift pre-amplifier rejecting common-mode interference while preserving DC–10 MHz signal integrity. Use Value: 75–100 dB CMRR over −40°C to +85°C and <2.5 μV/°C offset drift minimize calibration burden in field-deployed instruments. |
Use Scenario: Implementing high-Q, low-distortion active filters (e.g., Chebyshev, Bessel) for communications channel equalization or EMI suppression. IC Role / Device Role / Timing Role: Gain block in Sallen-Key or multiple-feedback topologies requiring wide bandwidth and low harmonic generation. Use Value: 0.1 dB gain flatness up to 30 MHz (±6 V) ensures phase linearity across filter passband; 90 mA output current sustains loaded filter responses. |
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 | Higher bandwidth (1.5 GHz), lower noise (0.92 nV/√Hz), but higher supply current (12.5 mA/amp) and narrower supply range (±1.5 V to ±5.5 V) | Better suited for RF/IF gain stages beyond DSL bands; less optimal for power-constrained CPE designs | Select LMH6624MA/NOPB only when >500 MHz bandwidth and sub-1 nV/√Hz noise are mandatory; verify layout for GHz stability |
| OPA2350UA/2K5 | Lower bandwidth (38 MHz), higher noise (7 nV/√Hz), rail-to-rail I/O, wider common-mode range (to V− and V+), lower supply current (5.7 mA/amp) | Targeted at general-purpose low-voltage instrumentation; lacks MTPR validation and ADSL-specific distortion specs | Choose OPA2350UA/2K5 for battery-powered sensors or single-supply systems below 20 MHz; avoid for DSL line receiver roles |
Compared with LMH6622MM/NOPB, LMH6624MA/NOPB trades power efficiency and supply flexibility for extreme RF performance, while OPA2350UA/2K5 sacrifices bandwidth and noise for ease of use in low-voltage, non-telecom applications - making LMH6622MM/NOPB the optimal balance for DSL analog front ends.
Availability
LMH6622MM/NOPB is available at Aetrix Electronics and suitable for xDSL modem design, ultrasound equipment development, and precision instrumentation requiring stable component supply, consistent parametric performance across temperature, and long-term obsolescence management.
Supply support for LMH6622MM/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, embedded processing, and connectivity technologies, with decades of expertise in high-speed amplifier design and broadband communications ICs.
The LMH6622MM/NOPB belongs to TI's high-performance analog amplifier portfolio, engineered specifically for telecom infrastructure and precision signal chain applications demanding ultra-low noise, high linearity, and robust wideband operation.
FAQ
What supply voltage ranges does the LMH6622MM/NOPB support?
The LMH6622MM/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. Both modes maintain 1.6–1.7 nV/√Hz input voltage noise and 90 mA linear output current.
Is the LMH6622MM/NOPB stable in unity-gain configuration?
No, the LMH6622MM/NOPB is not unity-gain stable. It is internally compensated for stable operation only when configured with closed-loop gain AV ≥2 (non-inverting) or AV ≤−1 (inverting). Attempting AV = +1 will cause peaking or oscillation; gain-setting resistors must be selected to meet these minimum absolute gain requirements for reliable DSL front-end use.
How does the LMH6622MM/NOPB achieve driver signal cancellation in ADSL hybrid circuits?
In ADSL receive applications, the LMH6622MM/NOPB functions as an inverting summing amplifier where one input receives the line signal and the other receives a scaled version of the transmit driver output. By setting R1 = 2×R2 (per TI Figure 36), the device cancels driver leakage at the output node, suppressing crosstalk and enabling full-duplex operation without external hybrid couplers - a key function validated in TI's SNOS986E application notes.
What is the maximum junction temperature and thermal resistance of the LMH6622MM/NOPB in VSSOP-8 package?
The LMH6622MM/NOPB in VSSOP-8 (DGK) package has a maximum junction temperature of +150°C and a junction-to-ambient thermal resistance (RθJA) of 211°C/W. Under continuous operation at TA = +85°C and IS = 8.6 mA total, power dissipation remains below 180 mW, keeping TJ well within limit if board-level copper area and airflow meet TI's layout guidelines in SNOS986E Section 11.
Does the LMH6622MM/NOPB support single-ended or differential input configurations?
The LMH6622MM/NOPB supports both configurations. Each amplifier channel features fully differential inputs (+IN/−IN), enabling true differential signaling when paired with complementary sources. In single-ended mode, the non-inverting input is biased to mid-supply or ground while the inverting input accepts the signal - a common setup in DSL hybrid summing and ultrasound echo amplification circuits described in TI's application report.
LMH6622MM/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
LMH6622MM/NOPB FAQ
1.How can I place an order for LMH6622MM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6622MM/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 LMH6622MM/NOPB reliable?
The price and inventory of LMH6622MM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6622MM/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6622MM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6622MM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6622MM/NOPB?
LMH6622MM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6622MM/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 LMH6622MM/NOPB?
For technical support, including LMH6622MM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6622MM/NOPB requirements.
6.How does Aetrix verify that LMH6622MM/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6622MM/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 LMH6622MM/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6622MM/NOPB?
All LMH6622MM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6622MM/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 LMH6622MM/NOPB part is unused and in its original packaging.
Return procedure for LMH6622MM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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