My Inquiry
My Account
Texas Instruments LMH6644MTX/NOPB
- Part No.:
- LMH6644MTX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LMH6644MTX/NOPB.pdf
- Description:
- IC OPAMP VFB 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,941
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LMH6644MTX/NOPB from Texas Instruments is a quad-channel, rail-to-rail output voltage feedback operational amplifier optimized for low-power, high-speed applications. It delivers 130 MHz −3 dB bandwidth (±5 V), 130 V/µs slew rate, ±75 mA linear output current, and 40 mV rail-to-rail output swing - enabling high-fidelity signal buffering in portable video, ADC front-ends, and active filter designs.
For engineers reviewing the LMH6644MTX/NOPB datasheet, LMH6644MTX/NOPB pinout, LMH6644MTX/NOPB application, or LMH6644MTX/NOPB equivalent, key selection criteria include guaranteed 130 MHz bandwidth at ±5 V, 2.7 mA per channel supply current, differential gain/phase of 0.01% / 0.01° under 150 Ω load, and TSSOP-14 package compatibility with space-constrained mixed-signal PCB layouts.
Technical Context
The LMH6644MTX/NOPB employs a voltage-feedback architecture with fully differential input stage and Class AB rail-to-rail output stage. Its stability is characterized by ≤2 dB peaking across all gains and loads, and 0.1 dB gain flatness up to 12 MHz into 150 Ω at AV = +2.
It operates from single supplies (2.7–12.8 V) or split supplies (±1.35 V to ±6.4 V), with input common-mode range extending 0.5 V beyond V− and 1 V from V+, and no phase reversal when CMVR is exceeded.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3 dB Bandwidth | 130 MHz at ±5 V, AV = +1 - supports high-frequency signal conditioning without attenuation in video or RF IF stages. |
| Slew Rate | 130 V/µs (AV = −1) - preserves large-swing transient fidelity in fast-settling data acquisition systems. |
| Output Current | ±75 mA linear drive - directly drives 150 Ω video loads or multiple parallel inputs without external buffers. |
| Supply Current | 2.7 mA per channel (no load) - enables quad-channel operation within tight power budgets for battery-powered instrumentation. |
| Input Voltage Noise | 17 nV/√Hz at 100 kHz - maintains SNR integrity in precision sensor amplification chains. |
| Differential Gain/Phase | 0.01% / 0.01° (NTSC, RL = 1 kΩ) - meets broadcast-grade video linearity requirements without post-compensation. |
| Settling Time | 68 ns to ±0.1% - ensures accurate sampling in 10+ MSPS ADC buffer applications. |
Pinout & Package
TSSOP-14 package (5.00 mm × 4.40 mm body size), thermally enhanced for continuous operation at 85°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 8 | No connection | Unused pins; must be left floating or tied to ground per layout best practices. |
| 2 | Inverting Input ChA | High-impedance differential input node for Channel A; accepts signals down to 0.5 V below V−. |
| 3 | Non-inverting Input ChA | High-impedance differential input node for Channel A; supports common-mode range up to 1 V below V+. |
| 4 | Negative Supply (V−) | Power rail reference for all four channels; supports single-supply (0 V) or split-supply (−5 V) operation. |
| 6 | Inverting Input ChB | Independent input for Channel B; electrically isolated from ChA to prevent crosstalk. |
| 7 | Non-inverting Input ChB | Independent input for Channel B; identical CMVR and noise specs as ChA inputs. |
| 9 | Inverting Input ChC | Third channel input; validated for simultaneous operation with other channels at full speed. |
| 10 | Non-inverting Input ChC | Third channel input; shares same bias current (−1.6 µA typ) and offset drift (±5 µV/°C) as ChA/B. |
| 11 | Positive Supply (V+) | Power rail for all channels; supports up to 12.8 V total supply range (V+ − V−). |
| 12 | Non-inverting Input ChD | Fourth channel input; fully characterized for THD < −62 dBc at 5 MHz with 2 VPP output. |
| 13 | Inverting Input ChD | Fourth channel input; matched to ChC for balanced quad-filter implementations. |
| 14 | Output ChD | Rail-to-rail output capable of sourcing/sinking ±75 mA; swings within 40 mV of V+ or V−. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | 40 mV from either supply rail - maximizes dynamic range in low-voltage (3 V) systems without level-shifting circuitry. |
| Output short-circuit protection | Infinite duration at VS < 6 V - eliminates need for external current-limiting resistors in fault-prone industrial interfaces. |
| No output phase reversal | Guaranteed behavior beyond CMVR - prevents latch-up or instability in overdriven sensor front-ends. |
| Low distortion at high frequency | −62 dBc THD at 5 MHz, 2 VPP, AV = +2 - enables clean signal reconstruction in wideband communication receivers. |
| Wide supply range | 2.7 V to 12.8 V single supply or ±1.35 V to ±6.4 V dual supply - simplifies power architecture across portable, industrial, and automotive subsystems. |
Applications
| Active Filters | ADC Buffer Amplifier |
|---|---|
Use Scenario: 4th-order Butterworth low-pass filter for anti-aliasing prior to 12-bit, 10 MSPS SAR ADC. IC Role / Device Role / Timing Role: Quad-channel configuration implements two 2-pole sections with matched gain and phase response. Use Value: 130 MHz bandwidth and 68 ns settling ensure minimal group delay distortion and full-scale step accuracy. | Use Scenario: Driving the input of a high-resolution successive-approximation ADC in a portable medical sensor. IC Role / Device Role / Timing Role: Single-supply (3 V) buffer isolating transducer signal from ADC input capacitance. Use Value: 40 mV rail-to-rail swing and 2.7 mA/channel quiescent current extend battery life while preserving ENOB. |
| Portable Video Signal Conditioning | Current Sense Amplifier Interface |
Use Scenario: RGB video line driver in handheld display module with 150 Ω coaxial output termination. IC Role / Device Role / Timing Role: One channel per color (R/G/B), configured as unity-gain follower with DC-coupled output. Use Value: 0.01% DG / 0.01° DP performance maintains color fidelity without external calibration. | Use Scenario: Bidirectional current sense amplifier output stage driving 10-bit microcontroller ADC input. IC Role / Device Role / Timing Role: Differential-to-single-ended conversion with gain of +2, rejecting common-mode noise on shunt resistor. Use Value: 17 nV/√Hz input noise and 75 mA output drive enable sub-milliohm shunt resolution at 100 kHz bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, rail-to-rail output op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6643MM/NOPB | Dual-channel version in VSSOP-8; identical electrical specs per channel but half the channel count. | Used where only two independent high-speed paths are required - reduces board area and cost vs. quad solution. | Select when system requires exactly two channels and space constraints favor 3.0 mm × 3.0 mm footprint. |
| OPA2350UA/2K5 | Lower bandwidth (38 MHz), lower slew rate (22 V/µs), but lower input bias current (0.5 pA) and higher CMRR (100 dB). | Better suited for high-impedance sensor interfaces than video or fast-settling ADC buffering. | Choose for precision DC-coupled applications where speed is secondary to ultra-low input current and offset stability. |
Compared with LMH6643MM/NOPB, the LMH6644MTX/NOPB provides double channel density in a larger TSSOP-14 package, enabling compact quad-channel designs; versus OPA2350UA/2K5, it trades DC precision for 3.4× higher bandwidth and 5.9× faster slew rate - making it optimal for AC-coupled, wideband signal paths.
Availability
LMH6644MTX/NOPB is available at Aetrix Electronics and suitable for portable video systems, high-speed data acquisition, and industrial sensor interface designs requiring stable component supply across extended temperature ranges (−40°C to +85°C).
Supply support for LMH6644MTX/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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LMH664x family was designed specifically for high-fidelity, low-power signal conditioning in portable and space-constrained systems - emphasizing rail-to-rail output drive, video-grade linearity, and robust operation across wide supply and temperature ranges.
FAQ
What is the maximum supply voltage rating for LMH6644MTX/NOPB?
The LMH6644MTX/NOPB has an absolute maximum supply voltage (V+ − V−) of 13.5 V. Recommended operating range is 2.7 V to 12.8 V. Exceeding 13.5 V risks permanent damage, and operation above 12.8 V voids parametric guarantees per TI's SNOS966Q datasheet Section 7.1.
Does LMH6644MTX/NOPB support true single-supply operation with input down to ground?
Yes. The LMH6644MTX/NOPB input common-mode voltage range extends to 0.5 V below V−, allowing operation with V− = 0 V and valid input signals from 0 V to (V+ − 1 V). This enables direct interfacing with ground-referenced sensors or DAC outputs in 3 V or 5 V systems.
What is the thermal resistance (RθJA) of LMH6644MTX/NOPB in its TSSOP-14 package?
The LMH6644MTX/NOPB in TSSOP-14 (PW14A) package has a junction-to-ambient thermal resistance (RθJA) of 155°C/W, as specified in Section 7.4 of the SNOS966Q datasheet. This value assumes standard JEDEC high-K test board conditions; actual PCB layout will affect real-world thermal performance.
Can LMH6644MTX/NOPB drive a 150 Ω load while maintaining video-grade differential gain and phase?
Yes. The LMH6644MTX/NOPB is fully characterized for differential gain of 0.01% and differential phase of 0.01° into a 150 Ω load at NTSC frequencies, as verified in Section 7.5 and 7.6 of the datasheet. This performance holds across temperature (−40°C to +85°C) and supply voltages (3 V, 5 V, ±5 V).
Is LMH6644MTX/NOPB pin-compatible with other devices in the LMH664x family?
No. The LMH6644MTX/NOPB uses a 14-pin TSSOP package with dedicated pins for four independent op-amp channels. It is not pin-compatible with the LMH6642 (5-pin SOT-23) or LMH6643 (8-pin SOIC/VSSOP); each variant has distinct pin counts, functions, and footprints requiring separate PCB layouts.
LMH6644MTX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMH®
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 135V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 130 MHz
- Current - Input Bias:
- 1.6 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 2.7mA (x4 Channels)
- Current - Output / Channel:
- 75 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 12.8 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
LMH6644MTX/NOPB FAQ
1.How can I place an order for LMH6644MTX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6644MTX/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 LMH6644MTX/NOPB reliable?
The price and inventory of LMH6644MTX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6644MTX/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6644MTX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6644MTX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6644MTX/NOPB?
LMH6644MTX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6644MTX/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 LMH6644MTX/NOPB?
For technical support, including LMH6644MTX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6644MTX/NOPB requirements.
6.How does Aetrix verify that LMH6644MTX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6644MTX/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 LMH6644MTX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6644MTX/NOPB?
All LMH6644MTX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6644MTX/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 LMH6644MTX/NOPB part is unused and in its original packaging.
Return procedure for LMH6644MTX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMH6644MTX/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…
