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Texas Instruments LMH6642MA/NOPB
- Part No.:
- LMH6642MA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6642MA/NOPB.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:413
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Product details
Overview
LMH6642MA/NOPB from Texas Instruments is a single-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 MHz full-power bandwidth at 3 V supply - enabling high-fidelity ADC buffering and active filter design in portable video and current-sense systems.
For engineers reviewing the LMH6642MA/NOPB datasheet, LMH6642MA/NOPB pinout, LMH6642MA/NOPB application, or LMH6642MA/NOPB equivalent, key selection criteria include its 2.7–12.8 V supply range, 40 mV rail-to-rail output swing, −62 dBc THD at 5 MHz, 68 ns settling time, and guaranteed performance across −40°C to +85°C industrial temperature range.
Technical Context
The LMH6642MA/NOPB employs a voltage-feedback architecture with fully differential input stage and Class-AB rail-to-rail output stage capable of sourcing/sinking ±75 mA. Its stability is characterized by 0.1 dB gain flatness up to 12 MHz under 150 Ω load at AV = +2 and minimal peaking (≤2 dB) across all gains and loads.
Input common-mode range extends 0.5 V beyond V− and within 1 V of V+, while output swings to within 40 mV of either rail. The device is fully characterized at 3 V, 5 V, and ±5 V supplies, with thermal resistance RθJA = 190 °C/W in SOIC-8 package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3 dB Bandwidth | 130 MHz at ±5 V, AV = +1 - supports high-frequency signal conditioning without phase loss in video or RF front-end buffers. |
| Slew Rate | 130 V/µs (AV = −1) - maintains large-signal fidelity for fast transient response in pulse amplification and DAC output stages. |
| Output Current | ±75 mA linear drive - directly drives 150 Ω video loads or multiple CMOS inputs without external buffers. |
| Supply Range | 2.7 V to 12.8 V - enables operation from single Li-ion (3.3 V) to dual-supply ±5 V industrial systems. |
| THD @ 5 MHz | −62 dBc (RL = 2 kΩ, VO = 2 VPP, AV = +2) - meets professional video DG/DP specs (0.01% / 0.01°) for NTSC signal integrity. |
| Settling Time | 68 ns to ±0.1% - ensures accurate sampling in 12-bit+ ADC interfaces with minimal acquisition overhead. |
| Input Noise | 17 nV/√Hz @ 100 kHz - preserves SNR in precision sensor signal chains and low-level analog front-ends. |
Pinout & Package
LMH6642MA/NOPB is packaged in an 8-pin SOIC (D08A) with 4.90 mm × 3.91 mm body size and standard JEDEC MS-012 footprint.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output | Amplified single-ended output node; rail-to-rail swing (40 mV from rails) supports wide dynamic range in low-voltage systems. |
| 2 | Inverting Input (−IN) | Differential input terminal; accepts signals down to 0.5 V below V−, enabling true single-supply operation with ground-referenced inputs. |
| 3 | Non-inverting Input (+IN) | Differential input terminal; common-mode range extends to 1 V below V+, supporting high-side sensing and level-shifting. |
| 4 | V− | Negative supply pin; supports dual-supply (±1.5 V to ±5 V) or single-supply (0 V reference) configurations. |
| 5 | V+ | Positive supply pin; operates from 2.7 V to 12.8 V total supply range - compatible with battery, LDO, or switching regulator rails. |
| 6 | NC | No connection; internally unconnected - must be left floating or tied to ground per layout best practices. |
| 7 | NC | No connection; internally unconnected - no electrical function; avoid routing signals or power to this pin. |
| 8 | NC | No connection; internally unconnected - unused pad; no thermal or electrical role in SOIC-8 variant. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Swings within 40 mV of V+ and V− - maximizes usable signal headroom in 3 V and lower supply systems. |
| Low distortion | −62 dBc THD at 5 MHz enables broadcast-grade video buffering without post-processing correction. |
| Fast settling | 68 ns to ±0.1% ensures <1 LSB error in 12-bit ADC sampling at >1 MSPS rates. |
| Output short-circuit protection | Infinite duration protection at VS < 6 V - eliminates need for external current-limiting in fault-prone interfaces. |
| Wide supply range | 2.7–12.8 V operation allows reuse across portable, industrial, and automotive subsystems without redesign. |
Applications
| ADC Buffer Amplifier | Portable Video Driver |
|---|---|
|
Use Scenario: Driving SAR or sigma-delta ADC inputs with 12+ bit resolution in battery-powered data loggers. IC Role / Device Role / Timing Role: High-speed, low-noise buffer isolating ADC from source impedance and providing fast settling. Use Value: 68 ns settling and 17 nV/√Hz noise preserve effective number of bits (ENOB) without oversampling penalty. |
Use Scenario: Output stage for HDMI or analog composite video in handheld medical displays and inspection cameras. IC Role / Device Role / Timing Role: Rail-to-rail output driver meeting NTSC/PAL differential gain/phase specs (0.01%/0.01°). Use Value: −62 dBc THD and 0.1 dB gain flatness to 12 MHz ensure color fidelity and minimal cross-luminance artifacts. |
| Active Filter Stage | Current Sense Amplifier |
|
Use Scenario: Second-order Sallen-Key or MFB filter in ECG front-end or ultrasound receive path. IC Role / Device Role / Timing Role: High-gain-bandwidth product (130 MHz) op-amp implementing precise cutoff and phase response. Use Value: 130 MHz GBW and low input bias current (−1.6 µA typical) maintain filter Q-factor and center frequency accuracy. |
Use Scenario: Bidirectional shunt current monitoring in motor control inverters and power supply telemetry. IC Role / Device Role / Timing Role: Low-offset, high-output-current amplifier converting mΩ shunt voltage to system-level logic. Use Value: ±75 mA drive capability sustains 150 Ω load compliance while 68 ns settling enables real-time overcurrent detection. |
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 |
|---|---|---|---|
| LMH6643MA/NOPB | Dual-channel version in same SOIC-8 package; identical AC specs but higher total supply current (5.4 mA vs. 2.7 mA). | Used where two matched amplifiers required (e.g., I/Q channel processing); not suitable for space-constrained single-channel designs. | Select LMH6642MA/NOPB when only one amplifier is needed and board area or quiescent power is critical. |
| OPA355UA | Lower bandwidth (200 MHz), higher supply current (5.5 mA), no output short-circuit protection, and narrower supply range (2.5–5.5 V). | Better suited for ultra-high-speed small-signal apps (e.g., laser diode drivers); lacks robustness for heavy-load or fault-tolerant use. | Choose LMH6642MA/NOPB for industrial environments requiring fault immunity, wide supply flexibility, and proven video performance. |
Compared with LMH6643MA/NOPB and OPA355UA, LMH6642MA/NOPB uniquely balances 130 MHz bandwidth, ±75 mA drive, rail-to-rail output, and integrated short-circuit protection in a single-channel SOIC-8 - making it optimal for cost-sensitive, reliability-critical, single-amplifier signal chain nodes.
Availability
LMH6642MA/NOPB is available at Aetrix Electronics and suitable for ADC buffering, portable video interfaces, active filtering, and current-sense amplification requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LMH6642MA/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 delivering analog and embedded processing solutions with focus on reliability, performance, and broad portfolio scalability.
The LMH664x family was designed specifically for high-fidelity, low-power, rail-to-rail output amplification in portable video, instrumentation, and communications infrastructure - emphasizing distortion performance, output drive, and supply flexibility.
FAQ
What is the maximum supply voltage for LMH6642MA/NOPB?
The absolute maximum supply voltage (V+ − V−) for LMH6642MA/NOPB is 13.5 V, with recommended operating range from 2.7 V to 12.8 V. Operation at 12.8 V is supported across the full −40°C to +85°C temperature range, and thermal derating is managed via RθJA = 190 °C/W in SOIC-8 package. Exceeding 13.5 V risks permanent damage.
Does LMH6642MA/NOPB support true single-supply operation?
Yes, LMH6642MA/NOPB supports true single-supply operation: its input common-mode range extends 0.5 V below V− (i.e., to −0.5 V when V− = 0 V) and within 1 V of V+, while output swings to within 40 mV of both rails. This enables ground-referenced inputs and full-scale output utilization with a 3 V or 5 V single rail - confirmed in 3 V and 5 V electrical characteristics tables.
What is the output short-circuit behavior of LMH6642MA/NOPB?
LMH6642MA/NOPB features internal output short-circuit protection. At supply voltages below 6 V, short-circuit duration is infinite at room temperature; above 6 V, allowable duration is limited to 1.5 ms. This protection is active for both sourcing and sinking faults and does not require external current-limiting components - verified in ±5 V and 5 V electrical characteristics sections.
Can LMH6642MA/NOPB drive a 150 Ω video load while maintaining NTSC specifications?
Yes, LMH6642MA/NOPB is explicitly characterized for 150 Ω loads: differential gain is 0.01% and differential phase is 0.01° under NTSC conditions (AV = +2, RL = 150 Ω), and −62 dBc THD is maintained at 5 MHz. These values meet broadcast-grade video requirements and are validated across temperature and supply variations in TI's SNOS966Q datasheet.
Is LMH6642MA/NOPB pin-compatible with other devices in the LMH664x family?
LMH6642MA/NOPB (single-channel) uses an 8-pin SOIC package with pins 1–5 assigned to OUTPUT, −IN, +IN, V−, and V+. LMH6643 (dual) shares identical pinout for Channel A but adds Channel B on pins 6–8 - meaning LMH6642MA/NOPB is not pin-compatible with LMH6643 or LMH6644. No drop-in replacement exists without PCB revision.
LMH6642MA/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- 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
- 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:
- 8-SOIC
LMH6642MA/NOPB FAQ
1.How can I place an order for LMH6642MA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6642MA/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 LMH6642MA/NOPB reliable?
The price and inventory of LMH6642MA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6642MA/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6642MA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6642MA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6642MA/NOPB?
LMH6642MA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6642MA/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 LMH6642MA/NOPB?
For technical support, including LMH6642MA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6642MA/NOPB requirements.
6.How does Aetrix verify that LMH6642MA/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6642MA/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 LMH6642MA/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6642MA/NOPB?
All LMH6642MA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6642MA/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 LMH6642MA/NOPB part is unused and in its original packaging.
Return procedure for LMH6642MA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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