My Inquiry
My Account
Texas Instruments LMH6644MA/NOPB
- Part No.:
- LMH6644MA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6644MA/NOPB.pdf
- Description:
- IC OPAMP VFB 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:269
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LMH6644MA/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 (at ±5 V), 130 V/µs slew rate, ±75 mA linear output current, and −62 dBc THD at 5 MHz - enabling high-fidelity ADC buffering and active filter design in portable video and industrial sensing systems.
For engineers reviewing the LMH6644MA/NOPB datasheet, LMH6644MA/NOPB pinout, LMH6644MA/NOPB application, or LMH6644MA/NOPB equivalent, key selection considerations include its 14-pin TSSOP package, guaranteed 2.7–12.8 V single- or split-supply operation, 40 mV rail-to-rail output swing, 17 nV/√Hz input voltage noise, and full characterization across 3 V, 5 V, and ±5 V conditions.
Technical Context
The LMH6644MA/NOPB employs a voltage-feedback architecture with fully differential input stage and Class AB rail-to-rail output stage, supporting stable operation at gains ≥ +1 without external compensation. Its input common-mode range extends 0.5 V beyond V− and 1 V from V+, while output swings within 40 mV of either rail under 2 kΩ load.
It achieves 0.1 dB gain flatness up to 12 MHz into 150 Ω at AV = +2, with 68 ns settling time (±0.1%) and 100 ns overdrive recovery - confirming suitability for precision timing-critical signal conditioning in multi-channel data acquisition systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3 dB Bandwidth | 130 MHz at ±5 V, AV = +1 - supports wideband analog front-end designs up to VHF. |
| Slew Rate | 130 V/µs (AV = −1) - preserves large-signal integrity for >40 MHz full-power bandwidth at 3 V supply. |
| Output Current | ±75 mA linear drive - drives 150 Ω video loads or multiple 10-bit+ ADC inputs without distortion. |
| Input Voltage Noise | 17 nV/√Hz at 100 kHz - maintains SNR in low-amplitude sensor signal chains. |
| Supply Range | 2.7 V to 12.8 V single or ±5 V split - enables direct interface with Li-ion, 3.3 V logic, and legacy ±5 V systems. |
| THD @ 5 MHz | −62 dBc (RL = 2 kΩ, VO = 2 VPP, AV = +2) - meets broadcast-grade video differential gain/phase specs (0.01% DG / 0.01° DP). |
| Settling Time | 68 ns to ±0.1% - ensures accurate sampling in multiplexed 1 MSPS+ data converters. |
Pinout & Package
LMH6644MA/NOPB is housed in a 14-pin TSSOP package (5.00 mm × 4.40 mm body size), optimized for space-constrained multichannel PCB layouts while maintaining thermal performance (RθJA = 155 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 8, 11 | N/C | No internal connection - must be left floating or grounded per layout best practices. |
| 2, 6, 9, 13 | −IN A/B/C/D | Inverting inputs for each of four independent amplifiers - referenced to local feedback network. |
| 3, 5, 10, 12 | +IN A/B/C/D | Non-inverting inputs for each channel - support single-ended or differential input configurations. |
| 4 | V− | Negative supply rail - accepts ground (single-supply) or negative voltage (split-supply) down to −5 V. |
| 7 | V+ | Positive supply rail - operates from 2.7 V to 12.8 V; decoupling required within 1 cm. |
| 14 | OUT D | Output of Channel D - rail-to-rail swing (40 mV from rails) into 2 kΩ load. |
| 1, 7, 8, 14 | OUT A/B/C/D | Amplifier outputs - individually configurable; no phase reversal when CMVR exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Within 40 mV of V+ or V− at 2 kΩ load - maximizes dynamic range in low-voltage systems (e.g., 3 V ADC buffers). |
| Input CMVR extension | 0.5 V beyond V− and 1 V from V+ - enables direct interfacing with sensors operating near ground or supply rails. |
| Output short-circuit protection | Continuous protection below 6 V supply; 1.5 ms max duration above 6 V - enhances system robustness in field-deployed equipment. |
| Low distortion at high frequency | −62 dBc THD at 5 MHz, 2 VPP - satisfies NTSC/PAL video linearity requirements without external trimming. |
| Stable gain-flat response | 0.1 dB flatness to 12 MHz into 150 Ω at AV = +2 - eliminates need for post-filtering in composite video or IF amplification. |
Applications
| ADC Buffer Amplifier | Portable Video Driver |
|---|---|
|
Use Scenario: Driving SAR or pipeline ADC inputs in battery-powered data loggers with 10+ bit resolution and >1 MSPS sampling rates. IC Role / Device Role / Timing Role: Single-supply buffer isolating ADC from source impedance, providing fast settling and low THD before sampling. Use Value: 68 ns ±0.1% settling time and −62 dBc THD ensure <0.5 LSB error at 10-bit resolution without calibration. |
Use Scenario: Driving RGB or YUV signals to LCD panels in handheld medical monitors or industrial HMIs. IC Role / Device Role / Timing Role: Quad-channel video line driver delivering simultaneous analog outputs with matched gain/phase. Use Value: 0.01% DG / 0.01° DP and 12 MHz 0.1 dB flatness preserve color fidelity and edge sharpness in 480p video streams. |
| Active Low-Pass Filter | Current Sense Amplifier Interface |
|
Use Scenario: 4th-order Butterworth anti-aliasing filter preceding high-speed digitization of motor current waveforms. IC Role / Device Role / Timing Role: Dual-stage op-amp in Sallen-Key topology, configured for unity-gain stability and minimal group delay. Use Value: 130 MHz bandwidth and 130 V/µs slew rate maintain filter cutoff accuracy up to 10 MHz without peaking or phase distortion. |
Use Scenario: Conditioning output of bidirectional current sense amplifiers (e.g., INA240) in 48 V DC-DC converter control loops. IC Role / Device Role / Timing Role: Precision gain stage scaling millivolt-level shunt voltage to 0–3.3 V ADC input range. Use Value: Input offset voltage ≤ ±5 mV and CMVR extending to −0.5 V enable accurate zero-current detection in high-side sensing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, rail-to-rail output amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6643MM/NOPB | Dual-channel version in 8-pin VSSOP; identical electrical specs but half channel count and smaller footprint. | Preferred for space-constrained dual-channel systems where quad integration is unnecessary. | Select when only two channels are needed and board area is critical - same biasing, layout, and thermal behavior. |
| OPA4350UA/2K5 | Lower bandwidth (38 MHz), lower slew rate (20 V/µs), but lower input bias current (0.2 pA vs. −1.6 µA typical) and higher CMRR (120 dB). | Better for ultra-high-impedance sensor interfaces requiring femtoamp-level bias control, not high-speed video or ADC buffering. | Choose only for DC-precision, low-frequency (<1 MHz) applications - not a functional substitute for LMH6644MA/NOPB's speed or drive capability. |
Compared with LMH6643MM/NOPB, LMH6644MA/NOPB provides double channel density in a larger TSSOP-14 package, enabling compact quad-channel signal paths without interposer routing; versus OPA4350UA/2K5, it trades DC precision for 3.4× higher bandwidth and 6.5× faster slew rate - making it unsuitable for microvolt-level DC measurements but optimal for dynamic signal conditioning.
Availability
LMH6644MA/NOPB is available at Aetrix Electronics and suitable for portable video drivers, high-speed ADC buffering, active filter design, and industrial current sensing applications requiring stable component supply across extended temperature (−40°C to +85°C) and multi-voltage (2.7–12.8 V) operation.
Supply support for LMH6644MA/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 innovation in high-performance op-amps, data converters, and power management ICs.
The LMH664x family - including LMH6644MA/NOPB - was designed specifically for low-power, high-fidelity signal conditioning in portable and industrial systems demanding rail-to-rail output swing, wide bandwidth, and robust short-circuit protection.
FAQ
What supply voltage ranges does the LMH6644MA/NOPB support?
The LMH6644MA/NOPB operates from 2.7 V to 12.8 V single supply or ±5 V split supply. It is fully characterized at 3 V, 5 V, and ±5 V conditions, with guaranteed performance across −40°C to +85°C ambient temperature. The input common-mode range extends 0.5 V beyond V− and 1 V from V+, and output swings within 40 mV of either rail - making LMH6644MA/NOPB compatible with modern low-voltage microcontrollers and legacy industrial rails.
Does the LMH6644MA/NOPB require external compensation for unity-gain stability?
No, the LMH6644MA/NOPB is internally compensated for stable operation at gains ≥ +1. Its voltage-feedback architecture and optimized pole-zero placement ensure ≤2 dB peaking across all gain settings and load conditions (150 Ω to 2 kΩ). This eliminates the need for external compensation components, simplifying design of unity-gain buffers and active filters using LMH6644MA/NOPB.
What is the maximum continuous output current capability of the LMH6644MA/NOPB?
The LMH6644MA/NOPB delivers ±75 mA linear output current into resistive loads, with short-circuit protection rated for infinite duration at VS < 6 V (room temperature) and 1.5 ms maximum at VS > 6 V. Output voltage swing remains rail-to-rail (within 40 mV of V+ or V−) at 2 kΩ, degrading gracefully under heavier loads - a key specification verified across all four channels of LMH6644MA/NOPB.
How does the LMH6644MA/NOPB perform in video signal applications?
The LMH6644MA/NOPB meets broadcast-grade video specifications: 0.01% differential gain (DG) and 0.01° differential phase (DP) at NTSC frequencies, with 0.1 dB gain flatness up to 12 MHz into 150 Ω. These characteristics - confirmed in the LMH664x datasheet - make LMH6644MA/NOPB suitable for RGB, YUV, and composite video line driving without external equalization or trimming.
Is the LMH6644MA/NOPB pin-compatible with other devices in the LMH664x family?
No - LMH6644MA/NOPB uses a 14-pin TSSOP package with dedicated pins for four independent amplifiers (including N/C pins), whereas LMH6642 (SOT-23) and LMH6643 (VSSOP/SOIC) use 5- and 8-pin packages respectively. Pin mapping differs across variants; LMH6644MA/NOPB requires its specific 14-pin layout. Always verify pin functions in Section 6 of the LMH664x datasheet before substituting.
LMH6644MA/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMH®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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-SOIC
LMH6644MA/NOPB FAQ
1.How can I place an order for LMH6644MA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6644MA/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 LMH6644MA/NOPB reliable?
The price and inventory of LMH6644MA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6644MA/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6644MA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6644MA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6644MA/NOPB?
LMH6644MA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6644MA/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 LMH6644MA/NOPB?
For technical support, including LMH6644MA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6644MA/NOPB requirements.
6.How does Aetrix verify that LMH6644MA/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6644MA/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 LMH6644MA/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6644MA/NOPB?
All LMH6644MA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6644MA/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 LMH6644MA/NOPB part is unused and in its original packaging.
Return procedure for LMH6644MA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMH6644MA/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…
