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Texas Instruments LMH6622MAX
- Part No.:
- LMH6622MAX
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6622MAX.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,347
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Product details
Overview
LMH6622MAX 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 LMH6622MAX datasheet, LMH6622MAX pinout, LMH6622MAX application, or LMH6622MAX equivalent, this page provides verified specifications, SOIC-8 package details, dual-channel receive-path design context, and validated alternatives for ADSL/VDSL receiver stage selection.
Technical Context
The LMH6622MAX employs a voltage-feedback architecture with stable operation at closed-loop gains ≥+2 or ≤−1. Its VIP10 process enables simultaneous high bandwidth and low noise - critical for multitone DMT signal integrity in full-duplex xDSL systems where upstream (26–132 kHz) and downstream (144 kHz–1.1 MHz) channels coexist.
It supports both split-supply (±2.5 V to ±6 V) and single-supply (5 V to 12 V) operation, with input common-mode range extending to −4.75 V and +5.7 V under ±6 V conditions. Output swing reaches ±4.6 V into 100 Ω, sustaining 90 mA linear sourcing/sinking current for driving ADC input stages directly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (AV = +2) | 160 MHz - ensures flat gain across full ADSL downstream band (up to 1.1 MHz) with margin for filter roll-off and PCB parasitics. |
| Input Voltage Noise | 1.6 nV/√Hz - enables sub-−140 dBm/Hz line-referred noise density required by ADSL standards in CPE receive path. |
| Slew Rate | 85 V/μs - supports fast transient response for multi-carrier DMT symbols without slewing-induced distortion. |
| Harmonic Distortion (HD2) | −90 dBc @ 1 MHz, RL = 100 Ω - preserves signal fidelity during high-level multitone reception, minimizing intermodulation artifacts. |
| Supply Current (per amp) | 4.3 mA @ ±6 V - balances performance and power efficiency for dual-channel AFEs in space-constrained CPE modems. |
| Output Swing (RL = 100 Ω) | ±4.6 V - drives 12-bit+ ADCs directly without external level-shifting or gain staging. |
| Input Common-Mode Range | −4.75 V to +5.7 V @ ±6 V - accommodates transformer-coupled hybrid interface with DC bias flexibility. |
Pinout & Package
LMH6622MAX is supplied in an 8-pin SOIC (D package), body size 4.90 mm × 3.91 mm, with standard JEDEC MS-012AC footprint and 1.27 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT A (Pin 1) | Channel A output | Drives first ADC channel or hybrid summing node; capable of ±4.6 V swing into 100 Ω. |
| IN− A (Pin 2) | Channel A inverting input | Accepts inverted signal from hybrid coupler; used with R1/R2/RF for driver cancellation in Figure 36. |
| IN+ A (Pin 3) | Channel A non-inverting input | Connected to line-side transformer center tap or reference; sets common-mode bias point. |
| V− (Pin 4) | Negative supply rail | Supports split supplies down to −2.5 V; must be decoupled locally with 0.1 μF ceramic capacitor. |
| IN+ B (Pin 5) | Channel B non-inverting input | Second channel input for differential or independent receive path; shares same CMVR as Channel A. |
| IN− B (Pin 6) | Channel B inverting input | Configured identically to IN− A for parallel receive channel processing. |
| OUT B (Pin 7) | Channel B output | Independent output for second ADC or balanced signal path; matched AC performance to OUT A. |
| V+ (Pin 8) | Positive supply rail | Accepts +5 V to +12 V (single) or up to +6 V (dual); PSRR >74 dB minimizes supply noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel low-noise amplification | 1.6 nV/√Hz voltage noise per channel enables simultaneous high-SNR reception of upstream/downstream DMT tones. |
| Wideband linear output drive | 90 mA sourcing/sinking current maintains 160 MHz bandwidth into 100 Ω loads, eliminating need for external buffers before ADC. |
| Hybrid coupler integration capability | Stable at AV ≤−1 allows inverting summing configuration (Figure 36) to cancel driver leakage while amplifying received signal. |
| Flexible supply operation | Operates from ±2.5 V to ±6 V or +5 V to +12 V - supports legacy 5 V systems and modern low-voltage CPE designs. |
| High CMRR & PSRR | ≥75 dB CMRR and ≥74 dB PSRR suppress common-mode interference from line transformers and noisy digital supplies. |
Applications
| ADSL/VDSL Receiver 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 driver leakage via hybrid cancellation. IC Role / Device Role / Timing Role: Dual-channel receive-path preamplifier performing gain, noise-limited signal conditioning, and active hybrid function in analog front end. Use Value: 1.6 nV/√Hz noise and −90 dBc HD2 ensure compliance with ADSL spectral mask and MTPR requirements (e.g., −78 dBc upstream @ ±6 V). |
Use Scenario: Boosting low-amplitude echo 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) path prior to ADC sampling. Use Value: 160 MHz bandwidth supports >15 MHz transducer frequencies; 85 V/μs slew rate preserves pulse fidelity for short-duration echoes. |
| Low-Noise Instrumentation Front End | Active Filter Stage |
|
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-gain, low-drift, low-noise voltage amplifier with rail-to-rail output swing capability. Use Value: Input offset voltage ≤±2 mV and TC VOS ≤±2.5 μV/°C minimize drift; 17 MΩ common-mode input resistance avoids loading high-Z sensors. |
Use Scenario: Implementing high-Q, wideband active filters (e.g., Butterworth, Chebyshev) for anti-aliasing or channel selection in communications receivers. IC Role / Device Role / Timing Role: Gain block and integrator element in 2nd- or 4th-order filter topologies requiring low phase error and wide dynamic range. Use Value: 0.1 dB gain flatness to 30 MHz (±6 V) ensures minimal passband ripple; excellent harmonic rejection prevents filter nonlinearities from corrupting adjacent channels. |
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 | Lower input voltage noise (0.9 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 bandwidth-critical DSL paths due to reduced slew rate (65 V/μs). | Select LMH6624MA only when noise dominates over bandwidth; verify stability with target gain and load. |
| OPA2837IDR | Higher bandwidth (210 MHz), lower distortion (−105 dBc HD2), but higher noise (2.0 nV/√Hz) and narrower input CMVR (−3.7 V to +2.3 V @ ±5 V). | Preferred for wideband test equipment or video; less suitable for transformer-coupled xDSL interfaces requiring extended negative CMVR. | Choose OPA2837IDR for bandwidth-limited, low-distortion needs where CMVR constraints allow; avoid in ±6 V hybrid designs. |
Compared with LMH6622MAX, LMH6624MA trades bandwidth for lower noise, while OPA2837IDR prioritizes speed and linearity at the expense of noise and input range - making LMH6622MAX the balanced choice for DSL AFEs demanding all three parameters simultaneously.
Availability
LMH6622MAX is available at Aetrix Electronics and suitable for xDSL modem development, ultrasound front-end design, and low-noise instrumentation requiring stable component supply, long-term manufacturability, and TI's production-grade qualification.
Supply support for LMH6622MAX 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 op-amps and communications infrastructure ICs.
The LMH6622MAX belongs to TI's LMH high-speed amplifier product line, engineered specifically for broadband communications applications including xDSL, optical networking, and medical imaging front ends.
FAQ
What is the minimum supply voltage for LMH6622MAX in dual-supply mode?
The LMH6622MAX operates in dual-supply mode from ±2.5 V minimum, as specified in the Recommended Operating Conditions table. At ±2.5 V, it retains 150 MHz bandwidth and 80 V/μs slew rate, enabling low-power CPE designs while maintaining ADSL performance compliance. The LMH6622MAX datasheet confirms functionality across the full ±2.5 V to ±6 V range.
Does LMH6622MAX support single-supply operation, and what is the valid input common-mode range in that configuration?
Yes, LMH6622MAX supports single-supply operation from +5 V to +12 V. Under +5 V supply, the input common-mode voltage range is −0.25 V to +3.75 V (typical), allowing direct interfacing with ground-referenced sources or biased transformer outputs. This is documented in Section 6.3 and Figure 36 of the LMH6622MAX datasheet.
Can LMH6622MAX drive a 50 Ω load while maintaining specified bandwidth and distortion?
No - LMH6622MAX is characterized for 100 Ω loads (e.g., 160 MHz BW, −90 dBc HD2). Driving 50 Ω reduces output swing and increases distortion; at RL = 50 Ω, HD2 degrades to −88 dBc (±2.5 V) or −90 dBc (±6 V), and bandwidth drops ~10%. For 50 Ω systems, use buffer stages or select drivers rated for 50 Ω, such as THS3201.
Is LMH6622MAX pin-compatible with other devices in the LMH66xx family, such as LMH6624 or LMH6643?
No - LMH6622MAX uses an 8-pin SOIC package with dual-amplifier pinout (OUT A, IN− A, IN+ A, V−, IN+ B, IN− B, OUT B, V+). LMH6624MA shares the same pinout and package, but LMH6643 is a quad amplifier in 14-pin SOIC with different pin mapping. Pin compatibility exists only between LMH6622 variants (e.g., LMH6622MAX, LMH6622MAB) and LMH6624MA.
What layout practices are recommended to preserve LMH6622MAX's 160 MHz bandwidth and low-noise performance?
TI recommends: (1) local 0.1 μF ceramic decoupling on each supply pin, placed <2 mm from pins 4 and 8; (2) ground plane under amplifier with vias near V−/V+; (3) short, direct traces for feedback and input nets; (4) guard ring around inverting inputs if routing high-impedance nodes. These are detailed in Section 11 of the LMH6622MAX datasheet and validated in Figure 23 layout example.
LMH6622MAX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMH®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
LMH6622MAX FAQ
1.How can I place an order for LMH6622MAX through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6622MAX 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 LMH6622MAX reliable?
The price and inventory of LMH6622MAX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6622MAX is usually 5 days.
3.What payment methods are accepted for LMH6622MAX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6622MAX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6622MAX?
LMH6622MAX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6622MAX 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 LMH6622MAX?
For technical support, including LMH6622MAX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6622MAX requirements.
6.How does Aetrix verify that LMH6622MAX is sourced from the original manufacturer or authorized distributors?
All LMH6622MAX 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 LMH6622MAX meets industry standards.
7.What is the process for return or replacement of LMH6622MAX?
All LMH6622MAX units undergo pre-shipment inspection (PSI). If there is an issue with LMH6622MAX, 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 LMH6622MAX part is unused and in its original packaging.
Return procedure for LMH6622MAX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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