My Inquiry
My Account
Texas Instruments LMH6503MT/NOPB
- Part No.:
- LMH6503MT/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LMH6503MT/NOPB.pdf
- Description:
- IC VARIABLE GAIN 1 CIRC 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,112
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LMH6503MT/NOPB from Texas Instruments is a wideband, DC-coupled, differential-input voltage-controlled linear variable gain amplifier (VGA) with 135MHz −3dB bandwidth, 100MHz gain control bandwidth, and 70dB typical gain adjustment range over 10MHz. It integrates a high-speed current-feedback op amp output stage capable of ±75mA linear output current and ±3.2V output swing into 100Ω, enabling direct drive of low-impedance video, RF, or instrumentation loads.
For engineers reviewing the LMH6503MT/NOPB datasheet, LMH6503MT/NOPB pinout, LMH6503MT/NOPB application, or LMH6503MT/NOPB equivalent, this device is selected for precision analog signal conditioning where wide dynamic range, fast gain settling (<2.2ns rise time), low distortion (−57dBc THD at 20MHz), and stable gain matching (±0.7dB) are required in AGC loops, programmable filters, and RF front-end variable attenuators.
Technical Context
The LMH6503MT/NOPB employs a two-stage architecture: input differential voltage-to-current conversion via RG, followed by a voltage-controlled two-quadrant multiplier (K = 1.72 nominal) and current-feedback transimpedance output stage (gain set by RF). Gain is linear in V/V across −1V to +1V VG, with no internal logarithmic compression.
Its differential input supports common-mode rejection up to 1.8V, while the high-impedance VG pin (70kΩ, 1.3pF) enables simple DAC or op-amp drive. Output offset remains under ±350mV across full VG range, and thermal drift is managed via on-chip bias current compensation (TCBIAS = 100nA/°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3dB Bandwidth | 135MHz at AV(MAX) = 10 - supports baseband video, broadband IF, and wideband test equipment signals without roll-off. |
| Gain Control Bandwidth | 100MHz - enables fast gain updates synchronized with RF envelope or modulation timing. |
| Gain Adjustment Range | 70dB typical (f < 10MHz) - provides >1000:1 linear V/V scaling for automatic level control in receiver chains. |
| Slew Rate | 1800V/µs - sustains large-signal fidelity (4V step) in pulse-amplitude modulation and radar waveform generation. |
| Input Voltage Noise | 6.6nV/√Hz - preserves SNR in low-level sensor amplification prior to ADC sampling. |
| Output Current | ±75mA linear - drives 100Ω coaxial lines, active filters, or ADC input buffers without external buffering. |
| THD @ 20MHz | −57dBc (2VPP, RL = 100Ω) - meets broadcast video and communications spectral purity requirements. |
Pinout & Package
LMH6503MT/NOPB is packaged in a 14-pin TSSOP (PW0014A) with exposed thermal pad, optimized for high-frequency layout and thermal dissipation (θJA = 160°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 14 | V+ / V− Supply Rails | ±2.5V to ±6V dual supply inputs; decoupling required within 1cm for stability above 50MHz. |
| 2 | VG (Gain Control) | High-impedance (70kΩ) analog input accepting −1V to +1V for linear V/V gain control; 45µA bias current at 1.4V. |
| 3, 6 | +VIN / −VIN | Differential input pair with 750kΩ input resistance and 5pF capacitance; CMRR ≥67dB up to 1.8V common-mode. |
| 4, 5 | +RG / −RG | Current-setting terminals for external gain resistor (RG); IRGMAX = ±2.3mA defines max input voltage limit. |
| 7, 12 | GND / VREF | Ground reference and internal virtual ground node; connects to system ground or half-supply in single-ended operation. |
| 8, 9 | V− / V+ | Secondary supply pins - must be tied to main V−/V+ rails; not isolated or independent. |
| 10 | VOUT | Current-feedback output driving 100Ω load to ±3.2V; requires RF feedback resistor (e.g., 1kΩ) for transimpedance gain. |
| 11 | NC | No-connect pin; electrically isolated and must remain unconnected per TI design guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Linear-in-V/V gain control | Gain scales precisely as (VG + 1)/2 × K × RF/RG - eliminates lookup tables or calibration for closed-loop AGC. |
| Differential input architecture | Rejects common-mode noise on long traces or unbalanced sources, enabling clean amplification in mixed-signal PCBs. |
| DC-coupled signal path | Supports baseband applications down to 0Hz (e.g., ultrasound beamforming, precision instrumentation) without AC coupling caps. |
| Integrated current-feedback output | Delivers 1800V/µs slew rate and ±75mA drive into 100Ω - replaces discrete driver stages in high-speed data acquisition systems. |
| Low gain error drift | ±0.7dB device-to-device gain matching at max gain ensures consistent channel response in multi-path RF systems. |
Applications
| Video Signal Conditioning | RF Automatic Gain Control |
|---|---|
|
Use Scenario: Amplifying composite video (CVBS) or RGB signals before HDMI encoding or display driver ICs. IC Role / Device Role / Timing Role: Programmable gain stage compensating for variable source levels and cable loss in broadcast infrastructure. Use Value: 0.15% differential gain and 0.22° differential phase error preserve color fidelity; ±3.2V output swing matches 75Ω line driver requirements. |
Use Scenario: Controlling signal amplitude in cellular base station receive paths to maintain ADC input within full-scale range. IC Role / Device Role / Timing Role: Wideband VGA in IF or baseband AGC loop, responding to RSSI feedback with <2.2ns gain step settling. Use Value: 100MHz gain control bandwidth allows real-time adaptation to fast-fading multipath channels without lag-induced distortion. |
| Programmable Filter Tuning | Test Equipment Signal Generation |
|
Use Scenario: Adjusting filter passband gain in reconfigurable analog front-ends for spectrum analyzers or software-defined radios. IC Role / Device Role / Timing Role: Voltage-controlled gain element in active filter topologies (e.g., biquad, state-variable), tuned via DAC. Use Value: 70dB linear gain range enables precise attenuation or boost across decades of frequency without switching networks. |
Use Scenario: Generating calibrated, variable-amplitude sine waves in automated test equipment (ATE) stimulus modules. IC Role / Device Role / Timing Role: Final gain stage in arbitrary waveform generator output path, ensuring flat 135MHz response and low THD. Use Value: −57dBc THD at 20MHz and 6.6nV/√Hz input noise ensure spectral purity and dynamic range for metrology-grade testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar variable gain amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6502MA/NOPB | Logarithmic (dB-linear) gain control vs. LMH6503MT/NOPB's linear V/V control; 120MHz BW; same SOIC/TSSOP packages. | Better suited for RF power measurement and logarithmic AGC where dB-per-volt scaling is required. | Select LMH6502MA/NOPB when gain law must match RF detector outputs or simplify digital control interface. |
| AD8367ARUZ | 500MHz bandwidth; 45dB gain range; 2.7V–5.5V single supply; integrated RMS detector; different pinout and biasing. | Designed for higher-frequency IF/RF gain control (e.g., 400MHz LTE receivers) with built-in detection feedback path. | Choose AD8367ARUZ for >200MHz applications or when on-chip detector simplifies closed-loop AGC implementation. |
Compared with LMH6502MA/NOPB and AD8367ARUZ, LMH6503MT/NOPB delivers superior linearity in V/V gain law, lower THD at baseband frequencies, and tighter gain matching-making it optimal for precision video, instrumentation, and wideband analog signal processing where absolute gain accuracy matters more than ultimate RF bandwidth.
Availability
LMH6503MT/NOPB is available at Aetrix Electronics and suitable for video signal conditioning, RF automatic gain control, and programmable filter tuning requiring stable component supply across industrial temperature ranges (−40°C to +85°C) and long production lifecycles.
Supply support for LMH6503MT/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 over 90 years of innovation in high-performance signal chain solutions.
The LMH6503MT/NOPB belongs to TI's LMH™ high-speed amplifier family, engineered specifically for wideband, DC-coupled, linear variable-gain applications in professional video, test equipment, and communications infrastructure.
FAQ
What is the maximum supply voltage range supported by the LMH6503MT/NOPB?
The LMH6503MT/NOPB operates from ±2.5V to ±6V dual supplies (5V to 12V total), with absolute maximum ratings of ±6.3V per rail. At ±5V, it delivers full 135MHz bandwidth and ±75mA output current; reducing supply to ±2.5V lowers power consumption but reduces output swing and bandwidth proportionally. The LMH6503MT/NOPB must never exceed ±6.3V to avoid permanent damage.
How does the LMH6503MT/NOPB achieve linear-in-V/V gain control?
The LMH6503MT/NOPB implements linear V/V gain using an internal two-quadrant multiplier with nominal gain factor K = 1.72. Gain is calculated as AV = (RF/RG) × K × (VG + 1)/2, where VG ranges from −1V to +1V. This architecture ensures direct proportionality between VG voltage and output-to-input voltage ratio-no logarithmic compression or piecewise approximation-enabling predictable closed-loop behavior in precision analog systems.
Can the LMH6503MT/NOPB be used in single-supply configurations?
Yes, the LMH6503MT/NOPB supports single-supply operation by biasing its VREF (pin 12) and input common-mode to a stable virtual ground (e.g., VCC/2). The gain control range shifts to −1V to +1V relative to VREF, and unused input (e.g., −VIN) is tied to VREF. Output swing becomes asymmetric (e.g., 0V to VCC − 0.8V), but full functionality-including 70dB gain range and 100MHz control bandwidth-is retained with proper level-shifting design.
What is the purpose of the +RG and −RG pins on the LMH6503MT/NOPB?
The +RG and −RG pins (pins 4 and 5) connect to an external resistor (RG) that sets the input transconductance stage's current scaling. IRG = VIN_DIFF / RG determines the gain-setting current mirrored into the multiplier core. RG value directly impacts maximum input voltage (IRGMAX = ±2.3mA), bandwidth (lower RG increases BW), and noise performance. Typical values range from 174Ω to 820Ω depending on application gain and bandwidth targets.
Does the LMH6503MT/NOPB require external compensation components for stability?
No, the LMH6503MT/NOPB is internally compensated for unity-gain stability with standard RF feedback (e.g., 1kΩ) and 100Ω load. However, bandwidth and phase margin depend on external RF and RG values: higher RF increases gain but reduces bandwidth; lower RG increases bandwidth but raises input current. TI recommends verifying stability with actual layout parasitics using the provided small-signal frequency response plots in the LMH6503MT/NOPB datasheet.
LMH6503MT/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMH®
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Variable Gain
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1800V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 135 MHz
- Current - Input Bias:
- 11 µA
- Voltage - Input Offset:
- -
- Current - Supply:
- 37mA
- 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:
- 14-TSSOP
LMH6503MT/NOPB FAQ
1.How can I place an order for LMH6503MT/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6503MT/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 LMH6503MT/NOPB reliable?
The price and inventory of LMH6503MT/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6503MT/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6503MT/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6503MT/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6503MT/NOPB?
LMH6503MT/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6503MT/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 LMH6503MT/NOPB?
For technical support, including LMH6503MT/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6503MT/NOPB requirements.
6.How does Aetrix verify that LMH6503MT/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6503MT/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 LMH6503MT/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6503MT/NOPB?
All LMH6503MT/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6503MT/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 LMH6503MT/NOPB part is unused and in its original packaging.
Return procedure for LMH6503MT/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMH6503MT/NOPB Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
