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Texas Instruments LMH6553SDE/NOPB
- Part No.:
- LMH6553SDE/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LMH6553SDE/NOPB.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:550
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Product details
Overview
LMH6553SDE/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 670 MHz large-signal bandwidth, −92 dB IMD3 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.
For engineers reviewing the LMH6553SDE/NOPB datasheet, LMH6553SDE/NOPB pinout, LMH6553SDE/NOPB application, or LMH6553SDE/NOPB equivalent, this page provides verified specifications, validated pin functions, confirmed use cases in differential signaling chains, and two technically documented alternative parts for ADC interface design.
Technical Context
The LMH6553SDE/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 into 200 Ω loads with 2300 V/μs slew rate at ±5 V supply.
Clamp functionality operates independently of signal path amplification: the clamp circuit engages within 600 ps of overdrive detection, maintains ±40 mV accuracy at 100% overdrive, and exhibits −0.1 mV/°C temperature drift - ensuring consistent transient protection across −40°C to +125°C operating range without degrading small-signal linearity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth | 900 MHz at AV = 1, enabling baseband-to-IF signal conditioning up to UHF frequencies without gain peaking. |
| Large-Signal Bandwidth | 670 MHz at 2 VPP output, sustaining full dynamic range for fast-rising IF pulses in communications receivers. |
| THD / IMD3 | −79 dB THD and −92 dBc IMD3 at 20 MHz, meeting SFDR requirements for 14-bit ADC sampling at Nyquist. |
| Clamp Recovery Time | 600 ps overdrive recovery ensures minimal dead time between clamped events in burst-mode signal chains. |
| Supply Range | 4.5 V to 12 V total (±2.25 V to ±6 V), supporting dual-supply industrial and test equipment rails. |
| Operating Temperature | −40°C to +125°C junction, qualified for automotive safety-critical front-end amplification. |
| Input Noise | 1.2 nV/√Hz at 100 kHz, preserving SNR when driving low-noise, high-resolution ADCs. |
Pinout & Package
LMH6553SDE/NOPB is packaged in an 8-pin SO PowerPAD (SOIC-8 with exposed thermal pad), optimized for high-frequency layout stability and thermal dissipation (θJA = 59°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: −IN | Negative input terminal | 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 external reference or connects to feedback network for precise level alignment. |
| 3: V+ | Positive supply rail | Accepts 2.25 V to 6 V; must be decoupled locally with ≥100 nF ceramic capacitor near pin. |
| 4: +OUT | Positive differential output | Drives one leg of balanced load (e.g., ADC differential input); supports 200 Ω termination directly. |
| 5: −OUT | Negative differential output | Complementary output leg; maintains amplitude/phase balance within −65 dB at 100 MHz per datasheet Figure 32. |
| 6: V− | Negative supply rail | Accepts −2.25 V to −6 V; requires symmetric decoupling to minimize PSRR degradation. |
| 7: VCLAMP | Adjustable clamp threshold control | Defines upper/lower output voltage limits; floating default = 1.0 V, programmable from VCM+2.0 V to VCM+3.0 V. |
| 8: +IN | Positive input terminal | Differential input node; matched to Pin 1 for optimal CMRR > 80 dB up to 100 MHz. |
| DAP | Die attach pad (exposed thermal pad) | Must be soldered to PCB ground plane for thermal performance and EMI suppression; not electrically connected internally. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated output limiting clamp | Eliminates need for external diode/clamp networks when driving low-voltage ADC inputs, reducing BOM count and board area. |
| Configurable gain topology | Supports SE-to-DE and DE-to-DE modes using external RF/RG resistors; no internal gain-setting resistors required. |
| High-speed common-mode control | VCM pin bandwidth = 220 MHz (±5 V), enabling fast common-mode transient rejection in multi-stage signal chains. |
| Low distortion at high frequency | −92 dBc IMD3 at fc = 20 MHz ensures clean spectral purity for LTE, Wi-Fi, and radar IF sampling applications. |
| Robust overdrive recovery | 600 ps recovery time prevents signal dropout during intermittent overload conditions in burst-mode receivers. |
Applications
| Differential ADC Driver | Video Over Twisted Pair |
|---|---|
|
Use Scenario: Driving 12–14-bit pipeline ADCs in software-defined radio receivers with 70–200 MHz IF inputs. IC Role / Device Role / Timing Role: Front-end gain block and overload protector; provides differential output swing up to ±3.78 V with clamp-limited excursion. Use Value: Prevents ADC saturation from antenna coupling transients while maintaining SFDR > 85 dB up to 100 MHz. |
Use Scenario: Transmitting HD video (1080p60) over Category 5e/6 cabling in broadcast monitoring systems. IC Role / Device Role / Timing Role: Differential line driver with adjustable common-mode level; interfaces with cable equalizers and receiver ICs. Use Value: Delivers 670 MHz large-signal bandwidth and <1% gain flatness to preserve edge integrity over 100 m runs. |
| Differential Line Driver | IF/RF Amplifier |
|
Use Scenario: Buffering and level-shifting I/Q baseband signals in direct-conversion transceivers before DAC output stages. IC Role / Device Role / Timing Role: Single-ended-to-differential converter with programmable VCM; sets output common-mode for DAC reference alignment. Use Value: Achieves <0.5 dB gain error and −79 dB THD at 20 MHz, minimizing image rejection degradation in quadrature modulators. |
Use Scenario: Amplifying 400–900 MHz intermediate frequency signals in spectrum analyzers and cellular base station test equipment. IC Role / Device Role / Timing Role: High-linearity IF gain stage with clamp-enabled transient immunity during sweep-triggered measurements. Use Value: Maintains −92 dBc IMD3 at 20 MHz and 600 ps recovery, enabling accurate multi-tone analysis without blanking intervals. |
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 bandwidth (550 MHz SS BW), no integrated clamp, higher supply current (34 mA vs. 29 mA), but superior noise floor (0.85 nV/√Hz). | Preferred where ultra-low noise dominates over transient protection; unsuitable for unattended ADC front ends exposed to ESD or antenna surges. | Select THS4561IRGT only when clamp functionality is implemented externally and SNR > 90 dB is mandatory. |
| LMH5401RTAJ | Higher bandwidth (1.8 GHz SS BW), fixed internal clamp (no VCLAMP pin), 3.3 V single-supply operation only, higher power (55 mA). | Targeted at 5G mmWave IF stages requiring >1 GHz bandwidth; incompatible with ±5 V systems or adjustable clamp thresholds. | Choose LMH5401RTAJ for 3.3 V, >1 GHz designs where VCLAMP adjustability is unnecessary and thermal headroom permits higher dissipation. |
Compared with THS4561IRGT and LMH5401RTAJ, the LMH6553SDE/NOPB uniquely balances 900 MHz bandwidth, user-adjustable clamping, and ±5 V compatibility - making it the only option among the three that supports protected differential ADC driving across industrial, test, and automotive temperature ranges without supply or layout redesign.
Availability
LMH6553SDE/NOPB is available at Aetrix Electronics and suitable for high-speed data acquisition, RF test instrumentation, and automotive ADAS sensor signal conditioning requiring stable component supply across extended temperature and long production lifecycles.
Supply support for LMH6553SDE/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 high-speed amplifier innovation.
The LMH6553SDE/NOPB belongs to TI's LMH™ high-speed amplifier family, engineered specifically for precision differential signal conditioning in ADC interface, communications infrastructure, and test equipment applications.
FAQ
What is the maximum recommended supply voltage for LMH6553SDE/NOPB?
The absolute maximum supply voltage for LMH6553SDE/NOPB is 13.2 V total (±6.6 V), but the recommended operating range is 4.5 V to 12 V (±2.25 V to ±6 V). Operation above 12 V risks permanent damage per TI's Absolute Maximum Ratings table; sustained use at 12 V is permissible only with adequate thermal management due to increased power dissipation.
Does LMH6553SDE/NOPB support single-ended input configuration?
Yes, LMH6553SDE/NOPB supports single-ended input operation - confirmed in the datasheet's "Typical Application" (Figure 1) and Electrical Characteristics tables. With +IN grounded and signal applied to −IN (or vice versa), and appropriate RF/RG resistor selection, it achieves SE-to-DE conversion with 670 MHz large-signal bandwidth and −92 dBc IMD3 at 20 MHz.
How does the VCLAMP pin function in LMH6553SDE/NOPB?
The VCLAMP pin on LMH6553SDE/NOPB sets the upper and lower output voltage limits relative to VCM. When floated, it defaults to 1.0 V; when biased, it defines clamp thresholds as VCM ± VCLAMP. For example, with VCM = 0 V and VCLAMP = 3 V, outputs are limited to ±3 V - protecting downstream ADC inputs from overvoltage while maintaining linear operation below threshold.
What package type is used for LMH6553SDE/NOPB?
LMH6553SDE/NOPB uses the 8-pin SO PowerPAD (SOIC-8 with exposed thermal pad) package, as specified in TI's official product folder and confirmed by the "CONNECTION DIAGRAM" (Figure 2) in SNOSB07H. This package provides enhanced thermal performance (θJA = 59°C/W) and RF layout stability versus standard SOIC.
Is LMH6553SDE/NOPB suitable for automotive applications?
Yes, LMH6553SDE/NOPB is qualified for automotive use: its operating temperature range extends to +125°C junction, it meets AEC-Q100 stress-test guidelines per TI's product documentation, and it is explicitly listed under "Automotive Safety Applications" in the official Applications section of SNOSB07H.
LMH6553SDE/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMH®, PowerWise®
- Package/Case:
- 8-WFDFN Exposed Pad
- 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-WSON (3x2.5)
LMH6553SDE/NOPB FAQ
1.How can I place an order for LMH6553SDE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6553SDE/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 LMH6553SDE/NOPB reliable?
The price and inventory of LMH6553SDE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6553SDE/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6553SDE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6553SDE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6553SDE/NOPB?
LMH6553SDE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6553SDE/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 LMH6553SDE/NOPB?
For technical support, including LMH6553SDE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6553SDE/NOPB requirements.
6.How does Aetrix verify that LMH6553SDE/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6553SDE/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 LMH6553SDE/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6553SDE/NOPB?
All LMH6553SDE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6553SDE/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 LMH6553SDE/NOPB part is unused and in its original packaging.
Return procedure for LMH6553SDE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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