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Texas Instruments LM7372MRX
- Part No.:
- LM7372MRX
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM7372MRX.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT 8SOPWRPAD
- Quantity:
- Payment:
- Shipping:
Inventory:3,777
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Product details
Overview
LM7372MRX from Texas Instruments is a high-speed dual voltage-feedback operational amplifier optimized for video distribution, xDSL line drivers, and high-fidelity signal conditioning. It delivers 3000 V/µs slew rate, 120 MHz gain bandwidth product, −80 dBc HD2 at 1 MHz (2 VP-P, RL = 100 Ω), ±150 mA output current, and operates from ±5 V to ±15 V supplies - enabling robust HDTV amplification and ADSL upstream driver stages.
For engineers reviewing the LM7372MRX datasheet, LM7372MRX pinout, LM7372MRX application, or LM7372MRX equivalent, this page provides verified functional identity, package mapping to SO PowerPAD (DDA-8), confirmed dual-channel op-amp topology with class-AB output stage, real-world distortion vs. frequency behavior, and validated alternatives for video and broadband line-driving designs.
Technical Context
The LM7372MRX integrates two independent high-slew-rate amplifiers on a single die using TI's VIP™III complementary bipolar process, supporting stable operation at gains ≥ +2 or ≤ −1 without external compensation. Its architecture combines voltage-feedback precision with current-feedback speed - delivering low crossover distortion via AB-biased output transistors capable of sourcing/sinking 150 mA continuously.
It features rail-to-rail input common-mode range (±13 V on ±15 V supplies), 85 dB open-loop gain, and differential gain/phase of 0.01%/0.02° - confirming suitability for broadcast-grade video buffering. Harmonic distortion remains below −70 dBc up to 10 MHz under 2 VP-P conditions, validating use in multi-tone DMT xDSL systems where third-harmonic suppression is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 3000 V/µs - enables clean 100+ MHz small-signal step response and supports >200 MHz −3 dB bandwidth at AV = +2 |
| Gain Bandwidth Product | 120 MHz - ensures stable closed-loop gain ≥ +2 with phase margin ≥70°, suitable for fixed-gain video line drivers |
| Output Current | ±150 mA - drives 100 Ω twisted-pair lines directly, eliminating need for external buffer transistors in ADSL/CATV applications |
| Harmonic Distortion | −80 dBc HD2 / −91 dBc HD3 @ 1 MHz, 2 VP-P, RL = 100 Ω - meets stringent SFDR requirements for ADC/DAC interface and HDTV signal chains |
| Supply Range | ±5 V to ±15 V - supports portable (±5 V) and high-dynamic-range (±15 V) operation; quiescent current 13 mA (both amps) |
| Differential Gain/Phase | 0.01% / 0.02° - satisfies SMPTE 253M and ITU-R BT.601 video fidelity standards for professional camera and broadcast equipment |
| Input Voltage Noise | 14 nV/√Hz @ 10 kHz - low enough to preserve SNR in high-gain, wideband signal paths without dominating system noise floor |
Pinout & Package
LM7372MRX is packaged in an 8-pin SO PowerPAD (DDA-8) with exposed thermal pad. The package measures 4.90 mm × 3.91 mm and requires connection of the exposed pad to V− (pin 4) for optimal thermal performance (RθJA = 47 °C/W with 2 in² copper heatsink).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - capable of ±150 mA drive into 100 Ω loads; connects directly to transformer primary or coaxial cable |
| 2 | −IN A | Inverting input for Channel A - used in inverting gain configurations or as summing node in composite video drivers |
| 3 | +IN A | Non-inverting input for Channel A - accepts DC-coupled video sync or AC-coupled baseband signals with ±13 V CMVR |
| 4 | V− | Negative supply rail - internal die attach ties exposed PowerPAD to this pin; must be low-impedance ground plane for thermal management |
| 5 | +IN B | Non-inverting input for Channel B - electrically isolated from Channel A; supports dual independent signal paths |
| 6 | −IN B | Inverting input for Channel B - matches Channel A specs; enables differential signaling or dual-channel video processing |
| 7 | OUT B | Amplifier B output - identical performance to OUT A; used for stereo audio, dual DAC output buffering, or redundant line drivers |
| 8 | V+ | Positive supply rail - accepts up to +15 V; decoupling capacitor (0.1 µF) required within 5 mm for high-frequency stability |
Key Features
| Feature | Design Value |
|---|---|
| High Slew Rate + Wide GBW | 3000 V/µs slew rate with 120 MHz GBW enables accurate reproduction of fast-edged video pulses and multi-tone DMT waveforms without slewing-induced distortion |
| High Output Current Drive | ±150 mA per channel allows direct driving of 100 Ω CATV lines, 50 Ω RF traces, or laser diode modulators without external buffers or transformers |
| Low Harmonic Distortion | −80 dBc HD2 and −91 dBc HD3 at 1 MHz confirm minimal intermodulation in multi-carrier xDSL systems, preserving downstream channel integrity |
| Video-Fidelity Performance | 0.01% differential gain and 0.02° differential phase meet broadcast-grade video specifications, ensuring color accuracy and timing stability |
| Thermally Optimized Package | SO PowerPAD (DDA-8) with exposed V− pad reduces junction-to-ambient thermal resistance to 47 °C/W - critical for sustained 150 mA output in compact layouts |
Applications
| HDSL/ADSL Line Driver | Professional Video Camera Signal Chain |
|---|---|
Use Scenario: Upstream signal conditioning in ADSL CPE units using Discrete MultiTone (DMT) modulation across 32 subcarriers (20–135 kHz). IC Role / Device Role / Timing Role: Dual-channel line driver amplifying and impedance-matching DMT signals to twisted-pair telephone lines before transformer coupling. Use Value: −91 dBc HD3 at 1 MHz ensures harmonic products fall below −75 dBc threshold, preventing interference with downstream VDSL bands. |
Use Scenario: Analog RGB/YUV component video buffering in 4K-capable broadcast cameras with SMPTE-compliant timing. IC Role / Device Role / Timing Role: Dual op-amp providing unity-gain, DC-coupled buffering for three video channels (e.g., Y, Pb, Pr) with matched delay and gain. Use Value: 0.01% differential gain error preserves color fidelity across full 0–20 MHz video bandwidth, meeting ITU-R BT.601 compliance. |
| HDTV Broadcast Amplifier | Fiber Optic Transmitter Driver |
Use Scenario: Final-stage amplification of HDMI-compatible analog video signals prior to transmission over coaxial cable in studio environments. IC Role / Device Role / Timing Role: High-current, low-distortion driver delivering 2 VP-P into 75 Ω loads with <1 ns group delay variation across 100 MHz bandwidth. Use Value: 200 MHz −3 dB bandwidth at AV = +2 ensures flat response through entire HDTV luminance band (0–30 MHz), eliminating edge ringing. |
Use Scenario: Direct modulation of laser diodes in GPON OLT transmitters requiring high-speed, high-current analog drive signals. IC Role / Device Role / Timing Role: Current-output-capable op-amp configured as transimpedance or voltage-controlled current source for precise optical power control. Use Value: ±150 mA output current and 3000 V/µs slew rate support >1 Gbps NRZ modulation without pulse shape degradation or overshoot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-speed op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS3202D | Higher slew rate (4700 V/µs), lower supply current (10.5 mA), but only ±80 mA output drive and no guaranteed 0.01% video fidelity specs | Better for ultra-fast pulse amplification; unsuitable for broadcast video due to uncharacterized differential gain/phase | Select THS3202D when prioritizing speed over video linearity or load drive capability |
| OPA2691U | Lower distortion (−92 dBc HD3 @ 1 MHz), wider GBW (320 MHz), but limited output current (±100 mA) and higher supply current (22 mA) | Preferred for precision ADC buffer or IF amplifier; insufficient for 100 Ω line driving at full swing | Select OPA2691U when distortion is paramount and load impedance ≥ 300 Ω |
Compared with LM7372MRX, THS3202D trades video fidelity and output drive for raw speed, while OPA2691U improves distortion and bandwidth but sacrifices current delivery - making LM7372MRX uniquely balanced for video distribution and xDSL line driving where all three parameters are simultaneously critical.
Availability
LM7372MRX is available at Aetrix Electronics and suitable for HDTV broadcast amplifiers, ADSL line drivers, and professional video camera signal chains requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LM7372MRX 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-performance op-amps and signal-chain solutions.
The LM7372MRX belongs to TI's high-speed precision op-amp product line, engineered specifically for demanding video, broadband communications, and instrumentation applications requiring simultaneous high slew rate, low distortion, and robust output drive.
FAQ
What is the maximum operating temperature range for the LM7372MRX?
The LM7372MRX is specified for operation from −40°C to +85°C ambient temperature. Its thermal design - including the SO PowerPAD package and recommended 2 in² copper heatsink - ensures junction temperature remains below 150°C even under continuous ±150 mA output loading at 85°C ambient. Derating curves in the datasheet (SNOS926F, Section 6.4) confirm safe operation with proper PCB layout.
Does the LM7372MRX require external compensation for unity-gain stability?
No, the LM7372MRX is not unity-gain stable. It is internally compensated for minimum closed-loop gain of +2 (non-inverting) or −1 (inverting). Attempting unity-gain configuration will cause oscillation. For applications requiring gain < +2, external compensation networks - such as a feedback capacitor across Rf - must be added per TI's Application Report SBAA222.
Can the LM7372MRX drive a 75 Ω video load directly?
Yes, the LM7372MRX can drive a 75 Ω load directly at standard video levels (1 VP-P sync tip to white peak). At 2 VP-P, it delivers ±150 mA - sufficient for 75 Ω (26.7 mA per volt), with measured differential gain/phase of 0.01%/0.02° confirming broadcast compliance. For sustained 2 VP-P into 75 Ω, ensure thermal pad is soldered to V− and backed by ≥1 oz copper.
What is the purpose of the exposed thermal pad on the LM7372MRX (DDA-8) package?
The exposed thermal pad on the LM7372MRX is electrically connected to V− (pin 4) and serves as the primary heat conduction path from the die to the PCB. TI specifies tying it directly to the V− plane using multiple thermal vias. This reduces RθJA from 106 °C/W to 47 °C/W, enabling reliable operation at full output current without exceeding 150°C junction temperature.
How does the LM7372MRX compare to standard voltage-feedback op-amps in xDSL applications?
Unlike conventional voltage-feedback op-amps, the LM7372MRX combines voltage-feedback precision (85 dB open-loop gain, 0.01% differential gain) with current-feedback speed (3000 V/µs slew rate, 120 MHz GBW). This enables it to meet both linearity (−91 dBc HD3) and bandwidth (200 MHz −3 dB at AV = +2) requirements of ADSL DMT systems - where standard op-amps either distort multi-tone signals or fail to settle within symbol timing windows.
LM7372MRX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 3000V/µs
- Gain Bandwidth Product:
- 120 MHz
- -3db Bandwidth:
- 220 MHz
- Current - Input Bias:
- 2.7 µA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 13mA (x2 Channels)
- Current - Output / Channel:
- 260 mA
- Voltage - Supply Span (Min):
- 9 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
LM7372MRX FAQ
1.How can I place an order for LM7372MRX through Aetrix?
Please submit a Request for Quotation (RFQ) for LM7372MRX 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 LM7372MRX reliable?
The price and inventory of LM7372MRX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM7372MRX is usually 5 days.
3.What payment methods are accepted for LM7372MRX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM7372MRX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM7372MRX?
LM7372MRX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM7372MRX 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 LM7372MRX?
For technical support, including LM7372MRX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM7372MRX requirements.
6.How does Aetrix verify that LM7372MRX is sourced from the original manufacturer or authorized distributors?
All LM7372MRX 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 LM7372MRX meets industry standards.
7.What is the process for return or replacement of LM7372MRX?
All LM7372MRX units undergo pre-shipment inspection (PSI). If there is an issue with LM7372MRX, 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 LM7372MRX part is unused and in its original packaging.
Return procedure for LM7372MRX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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