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Texas Instruments LMH6553MRE/NOPB
- Part No.:
- LMH6553MRE/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6553MRE/NOPB.pdf
- Description:
- IC OPAMP CFA 1 CIRC 8SOPWRPAD
- Quantity:
- Payment:
- Shipping:
Inventory:413
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Product details
Overview
LMH6553MRE/NOPB from Texas Instruments is a 900 MHz fully differential amplifier with integrated adjustable output limiting clamp, designed as a high-fidelity ADC driver for 8–14-bit systems. It delivers −79 dB THD at 20 MHz, 10 ns 0.1% settling time, and 600 ps clamp overdrive recovery, enabling robust protection of downstream analog-to-digital converters in RF receiver front-ends and high-speed data acquisition.
For engineers reviewing the LMH6553MRE/NOPB datasheet, LMH6553MRE/NOPB pinout, LMH6553MRE/NOPB application, or LMH6553MRE/NOPB equivalent, this page provides verified functional context, validated pin-level circuit roles, confirmed differential signaling performance metrics, and real-world design implications for ADC interface, video over twisted pair, and IF/RF amplification use cases.
Technical Context
The LMH6553MRE/NOPB implements a fully differential architecture with internal common-mode feedback (VCM pin) and independent clamp control (VCLAMP pin), supporting both single-ended-to-differential and differential-to-differential configurations via external gain-setting resistors. Its transimpedance-based core enables stable operation with 275 Ω feedback networks and 200 Ω differential loads.
Clamp functionality operates independently of signal path gain, with ±40 mV accuracy under 100% overdrive and −0.1 mV/°C temperature drift. The amplifier maintains 670 MHz large-signal bandwidth at AV = 1 while delivering 2300 V/μs slew rate and 690 ps rise/fall time under ±5 V supply conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small Signal BW | 900 MHz at AV = 1, RL = 1 kΩ - supports wideband IF sampling up to 450 MHz Nyquist zone without gain peaking. |
| Large Signal BW | 670 MHz at AV = 1, VOUT = 2 VPP - preserves transient fidelity for pulsed RF and radar baseband signals. |
| THD @ 20 MHz | −79 dBc - ensures <0.012% harmonic distortion when driving 14-bit ADCs with 20 MHz full-scale sine inputs. |
| Clamp Recovery | 600 ps - enables sub-ns resumption of linear operation after overvoltage events, critical for burst-mode receivers. |
| Supply Range | ±2.5 V to ±6 V total (4.5–12 V) - compatible with both low-voltage portable systems and industrial ±5 V rails. |
| Input Noise | 1.2 nV/√Hz at 100 kHz - contributes <0.5 LSB noise to 14-bit 100 MSps ADCs with 50 Ω source impedance. |
| Output Swing | 5.47 VPP differential into 200 Ω - delivers >2.7 VPP per side for rail-to-rail ADC input compliance with ±1.8 V supplies. |
Pinout & Package
LMH6553MRE/NOPB is packaged in an 8-pin SO PowerPAD (MRE) thermally enhanced surface-mount package with exposed die attach pad (DAP) for improved thermal dissipation (θJA = 59°C/W). Pin numbering follows standard SOIC top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: −IN | Negative Input | Differential input node; accepts AC- or DC-coupled signals with ±3.14 V common-mode range at ±5 V supply. |
| 2: VCM | Output Common-Mode Control | Sets differential output common-mode voltage; drives internal feedback loop to maintain precise VOUT(CM) alignment. |
| 3: V+ | Positive Supply | Accepts +2.5 V to +6 V; must be decoupled with ≥100 nF ceramic capacitor near pin. |
| 4: +OUT | Positive Output | Active differential output; requires matched 275 Ω feedback resistor to VCM for unity-gain configuration. |
| 5: −OUT | Negative Output | Complementary differential output; forms 200 Ω differential load with +OUT for optimal distortion performance. |
| 6: V− | Negative Supply | Accepts −2.5 V to −6 V; shares same decoupling requirements as V+. |
| 7: VCLAMP | Output Clamp Voltage Control | Defines upper/lower clamping thresholds; floating default = 1.0 V, adjustable from VCM + 2.0 V to VCM + 3.0 V. |
| 8: +IN | Positive Input | Differential input node; paired with −IN to form 15 Ω differential input resistance and 0.5 pF capacitance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Output Clamp | Eliminates need for external diode-based clamping networks, reducing BOM count and PCB area in ADC front-end designs. |
| Adjustable Clamp Threshold | VCLAMP pin allows precise setting of clamping level relative to output common mode, enabling optimization for specific ADC input ranges. |
| Fast Overdrive Recovery | 600 ps recovery ensures minimal dead time between successive overvoltage events in time-interleaved or burst-mode systems. |
| Dual-Supply Flexibility | Operates from ±2.5 V to ±6 V, supporting low-power portable instrumentation and high-dynamic-range test equipment. |
| DC-Coupled Capability | Supports both AC- and DC-coupled inputs, enabling baseband signal conditioning for CCD outputs and precision sensor interfaces. |
Applications
| High-Speed ADC Driver | Video Over Twisted Pair |
|---|---|
|
Use Scenario: Driving 12–14-bit, 100 MSPS ADCs in software-defined radio receivers with variable IF frequencies up to 200 MHz. IC Role / Device Role / Timing Role: Differential signal conditioner and overload protector; converts single-ended antenna signals to balanced ADC inputs while clamping transients. Use Value: −92 dB IMD3 at 20 MHz prevents intermodulation corruption of adjacent channels; 600 ps clamp recovery avoids missing critical pulse edges. |
Use Scenario: Transmitting HD analog video (1080p60) over Category 5e UTP cabling in broadcast production switchers. IC Role / Device Role / Timing Role: Differential line driver with common-mode control; converts single-ended video source to balanced transmission line interface. Use Value: 900 MHz small-signal bandwidth preserves edge integrity of sync pulses; 82 dB CMRR rejects ground-loop noise induced on long cable runs. |
| Differential Line Driver | IF/RF Amplifier |
|
Use Scenario: Driving 100 Ω differential backplane traces in high-density FPGA-based digital oscilloscope front-ends. IC Role / Device Role / Timing Role: Gain block with configurable common-mode output; matches impedance to controlled-impedance PCB routing. Use Value: 2300 V/μs slew rate supports <1 ns rise times on 1 V step signals; 10 ns 0.1% settling ensures accurate waveform capture. |
Use Scenario: Amplifying 70–150 MHz intermediate frequency signals in cellular base station transceivers prior to downconversion. IC Role / Device Role / Timing Role: Low-distortion IF buffer; isolates filter stages while maintaining amplitude and phase linearity. Use Value: −78 dB HD3 at 70 MHz prevents spectral regrowth; 670 MHz large-signal bandwidth accommodates 40 MHz channel bandwidths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4561IRGT | Lower 550 MHz small-signal bandwidth; no integrated clamp; 1.8 V to 5.4 V single-supply only. | Best suited for low-voltage, space-constrained applications where clamp protection is handled externally. | Select when supply headroom is limited to ≤5.4 V and external clamping is acceptable. |
| ADA4940-1ARZ | 740 MHz small-signal bandwidth; no clamp; superior 1.1 nV/√Hz noise; supports ±3 V to ±5.5 V supplies. | Ideal for ultra-low-noise, high-resolution measurement systems where overvoltage protection is managed upstream. | Choose for metrology-grade signal chains requiring <−100 dB THD and no clamp overhead. |
Compared with THS4561IRGT and ADA4940-1ARZ, the LMH6553MRE/NOPB uniquely combines 900 MHz bandwidth, integrated clamp with 600 ps recovery, and dual-supply flexibility-making it the only option that simultaneously satisfies high-speed ADC protection, wide dynamic range, and system-level transient resilience requirements.
Availability
LMH6553MRE/NOPB is available at Aetrix Electronics and suitable for high-speed data acquisition, RF receiver front-ends, and video signal distribution requiring stable component supply across extended temperature ranges (−40°C to +125°C).
Supply support for LMH6553MRE/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 manufacturing.
The LMH6553MRE/NOPB belongs to TI's LMH™ high-speed amplifier family, engineered specifically for demanding signal chain applications including ADC driving, RF/IF conditioning, and precision differential signaling where bandwidth, linearity, and overload resilience are critical.
FAQ
What is the maximum recommended supply voltage for LMH6553MRE/NOPB?
The absolute maximum supply voltage for LMH6553MRE/NOPB is ±6.6 V (13.2 V total), but continuous operation above ±6 V risks permanent damage. Texas Instruments specifies 4.5 V to 12 V total supply range, with optimal performance observed at ±5 V. Operating at ±6 V is permissible only if thermal limits (TJ ≤ 150°C) are maintained via proper PCB layout and heatsinking.
Does LMH6553MRE/NOPB support DC-coupled inputs?
Yes, LMH6553MRE/NOPB supports both AC- and DC-coupled inputs. Its input common-mode voltage range extends to ±3.14 V at ±5 V supply, allowing direct connection to DC-biased sensors or baseband sources. When using DC coupling, ensure VCM is set to match the desired output common-mode level and verify input bias current effects on source impedance.
How does the VCLAMP pin function in LMH6553MRE/NOPB?
The VCLAMP pin sets the upper and lower voltage thresholds for the internal output limiting clamp. When left floating, it defaults to 1.0 V; applying a voltage from VCM + 2.0 V to VCM + 3.0 V defines the clamp level. Clamp accuracy is ±40 mV under 100% overdrive, with −0.1 mV/°C temperature drift-enabling precise protection of downstream 1.8 V or 3.3 V ADC inputs.
Can LMH6553MRE/NOPB drive a 50 Ω single-ended load?
No, LMH6553MRE/NOPB is optimized for differential 200 Ω loads (100 Ω per side) and does not support direct 50 Ω single-ended termination. Driving a 50 Ω load would cause excessive current draw, thermal stress, and degraded distortion performance. For single-ended interfaces, use external balun or transformer coupling, or select a dedicated single-ended driver like THS3201.
What is the thermal resistance (θJA) of the LMH6553MRE/NOPB package?
The LMH6553MRE/NOPB in the 8-pin SO PowerPAD (MRE) package has a junction-to-ambient thermal resistance (θJA) of 59°C/W when mounted on a standard 2-layer PCB with 1 in² copper pour under the DAP. This value assumes 2 oz copper, 10 thermal vias to inner ground plane, and no forced airflow. Thermal performance degrades significantly without proper DAP soldering and thermal relief design.
LMH6553MRE/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMH®, PowerWise®
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- 2300V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 900 MHz
- Current - Input Bias:
- 50 µA
- Voltage - Input Offset:
- -
- Current - Supply:
- 29.1mA
- Current - Output / Channel:
- 120 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
LMH6553MRE/NOPB FAQ
1.How can I place an order for LMH6553MRE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6553MRE/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 LMH6553MRE/NOPB reliable?
The price and inventory of LMH6553MRE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6553MRE/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6553MRE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6553MRE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6553MRE/NOPB?
LMH6553MRE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6553MRE/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 LMH6553MRE/NOPB?
For technical support, including LMH6553MRE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6553MRE/NOPB requirements.
6.How does Aetrix verify that LMH6553MRE/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6553MRE/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 LMH6553MRE/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6553MRE/NOPB?
All LMH6553MRE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6553MRE/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 LMH6553MRE/NOPB part is unused and in its original packaging.
Return procedure for LMH6553MRE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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