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Texas Instruments LMH6657MG
- Part No.:
- LMH6657MG
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LMH6657MG.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,279
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Product details
Overview
LMH6657MG from Texas Instruments is a single-channel, voltage-feedback operational amplifier optimized for high-speed, low-distortion applications including video buffering and ADC/DAC interface. It delivers 270-MHz −3dB bandwidth (AV = +1), 700 V/µs slew rate, and ±80/−90 mA output drive at 5-V supply, operating from 3 V to 12 V single supply or ±2.5 V to ±5 V dual supply.
For engineers reviewing the LMH6657MG datasheet, LMH6657MG pinout, LMH6657MG application, or LMH6657MG equivalent, key selection criteria include its rail-to-rail output swing capability (0.8 V from rails into 2 kΩ), 0.03% differential gain / 0.10° differential phase for NTSC video, and input common-mode range extending 0.5 V below V−-critical for ground-referenced signal conditioning.
Technical Context
The LMH6657MG employs a voltage-feedback architecture with a 140-MHz gain-bandwidth product, enabling stable operation at gains ≥ +1 without external compensation. Its input stage supports input voltages down to 0.5 V below V−, simplifying level-shifting in single-supply systems.
Output stage delivers symmetrical sourcing/sinking current (±80/−90 mA typical) and recovers from overdrive in 18 ns. Distortion performance is characterized at 5 MHz (THD = −55 dBc), with 11 nV/√Hz input voltage noise and 2.1 pA/√Hz input current noise supporting precision analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3dB Bandwidth | 270 MHz at AV = +1 - enables wideband signal amplification up to UHF frequencies |
| Slew Rate | 700 V/µs - supports fast transient response for 500-mVPP signals with ≤3.3 ns rise time |
| Supply Range | 3 V to 12 V single supply or ±2.5 V to ±5 V dual supply - compatible with portable and industrial power rails |
| Output Current | +80/−90 mA - drives 100 Ω loads with minimal droop in video and test equipment interfaces |
| DG/DP Error | 0.03% / 0.10° at NTSC - meets broadcast-grade video fidelity requirements |
| Input Noise | 11 nV/√Hz @ 100 kHz - preserves SNR in low-level sensor and communication signal chains |
| Settling Time | 37 ns to 0.1% - ensures accurate sampling in high-speed data acquisition systems |
Pinout & Package
LMH6657MG is supplied in a 5-pin SC70 package (2.00 mm × 1.25 mm body size), optimized for space-constrained high-frequency PCB layouts.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTPUT | Amplified output node; capable of ±80/−90 mA drive and 0.8 V from rails into 2 kΩ |
| 2 | V− | Negative supply terminal; supports single-supply operation with inputs extending 0.5 V below this rail |
| 3 | +IN | Noninverting input; high-impedance (4 MΩ typical) node for precision signal routing |
| 4 | −IN | Inverting input; matched to +IN for balanced feedback configuration and minimal offset |
| 5 | V+ | Positive supply terminal; accepts 3–12 V single supply or up to ±5 V dual supply |
Key Features
| Feature | Design Value |
|---|---|
| Input Common-Mode Range | Extends 0.5 V below V− and 1.7 V from V+ - enables direct interfacing with ground-referenced sensors and DAC outputs |
| Output Voltage Swing | 0.8 V from either rail into 2 kΩ - maximizes dynamic range in 3.3 V and 5 V systems |
| No Output Phase Reversal | Remains stable even when input exceeds CMVR - eliminates latch-up risk in overdriven video or protection circuits |
| Short-Circuit Protection | Internally limited output current - prevents damage during board-level fault conditions without external components |
| Low Distortion | THD = −55 dBc at 5 MHz - maintains signal integrity in RF IF stages and high-fidelity audio paths |
Applications
| Video Signal Buffering | ADC Input Driver |
|---|---|
Use Scenario: Driving 75 Ω coaxial cable in DVD player video output stage with NTSC composite signal. IC Role / Device Role / Timing Role: High-speed unity-gain buffer isolating video DAC from transmission line, preserving DG/DP spec. Use Value: 0.03% DG / 0.10° DP error ensures broadcast-compliant color fidelity without external calibration. | Use Scenario: Conditioning analog sensor output prior to 12-bit, 10-MSPS SAR ADC in industrial data logger. IC Role / Device Role / Timing Role: Low-noise, fast-settling driver ensuring full-scale accuracy within 37 ns. Use Value: 11 nV/√Hz input noise and 37 ns 0.1% settling prevent SNR degradation and sampling aperture error. |
| Current Sense Amplifier | Portable Communications Interface |
Use Scenario: Amplifying mV-level shunt voltage in 48 V telecom power supply monitoring circuit. IC Role / Device Role / Timing Role: Precision gain-of-100 amplifier with rail-to-rail input enabling detection near system ground. Use Value: Input extends 0.5 V below V−, allowing accurate sensing of low-side shunt voltages without level shifters. | Use Scenario: Transmitting baseband I/Q signals in handheld RFID reader with 3.3 V battery supply. IC Role / Device Role / Timing Role: Single-supply, high-slew-rate driver for 20-MHz modulated waveforms. Use Value: 700 V/µs slew rate and 270-MHz bandwidth support clean 20-MHz envelope without distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6642MF | Lower bandwidth (130 MHz), lower supply current (2.3 mA), no input below V− | Better suited for low-power portable instrumentation where full 270-MHz BW is unnecessary | Select LMH6642MF only when power budget <3 mA/channel and ground-referenced input not required |
| OPA695IDBVT | Higher bandwidth (1.7 GHz), higher supply current (12.9 mA), requires external compensation | Targeted at RF IF gain blocks and optical receiver TIA post-amplifiers beyond video bandwidth | Choose OPA695IDBVT only when >1-GHz small-signal BW is mandatory and layout supports compensation network |
Compared with LMH6657MG, LMH6642MF trades bandwidth and rail-to-rail input for lower power, while OPA695IDBVT delivers extreme speed at higher current and design complexity-neither is pin-compatible, and both require revalidation for video or precision ADC driver use cases.
Availability
LMH6657MG is available at Aetrix Electronics and suitable for video signal buffering, ADC input driving, current sense amplification, and portable communications interface applications requiring stable component supply across industrial temperature ranges (−40°C to +85°C).
Supply support for LMH6657MG 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 for industrial, automotive, and communications markets.
The LMH6657MG belongs to TI's high-speed voltage-feedback op-amp product line, engineered specifically for video, instrumentation, and data acquisition systems demanding wide bandwidth, low distortion, and robust single-supply operation.
FAQ
What is the maximum supply voltage for LMH6657MG?
The LMH6657MG supports a total supply voltage range of 3 V to 12 V for single-supply operation, or ±2.5 V to ±5 V for dual-supply configurations. Absolute maximum ratings specify V+ − V− ≤ 12.6 V. Exceeding this may cause permanent damage. Operation at 12 V single supply is fully characterized per datasheet Section 6.3 Recommended Operating Conditions, and thermal limits remain within specification when PCB layout follows TI's thermal guidelines in SNOSA35G.
Does LMH6657MG support rail-to-rail input?
The LMH6657MG does not provide full rail-to-rail input. Its input common-mode voltage range extends 0.5 V below V− and 1.7 V from V+, as specified in Section 6.5 Electrical Characteristics. This allows input signals to go slightly below ground in single-supply configurations but does not reach the positive rail. For true rail-to-rail input, alternative amplifiers such as the OPA355 or TLV2462 would be required-LMH6657MG prioritizes speed and output drive over input range.
Can LMH6657MG drive a 75 Ω video load directly?
Yes, LMH6657MG can drive a 75 Ω video load directly. Datasheet Section 6.5 confirms ±80/−90 mA output current capability and specifies differential gain/phase performance under RL = 150 Ω to V+/2 for NTSC, a standard video loading condition. While 75 Ω is more demanding, the device's 100-MHz −3dB bandwidth at AV = +2 and 0.03%/0.10° DG/DP error validate its suitability for composite video distribution-TI application note SLOA058 further confirms 75 Ω drive capability in buffered video line drivers using LMH6657MG.
What is the output overdrive recovery time for LMH6657MG?
The LMH6657MG has an output overdrive recovery time of 18 ns, as specified in the Features table and Section 6.5 Electrical Characteristics. This parameter measures how quickly the amplifier returns to linear operation after large transient overdrive events-critical in video clamping, pulse amplification, and multiplexed signal paths where rapid signal transitions occur. Recovery is measured under AV = +1, RL = 100 Ω, and VOUT = 200 mVPP conditions per TI's test methodology in SNOSA35G.
Is LMH6657MG suitable for driving ADC inputs in a 12-bit, 10-MSPS system?
Yes, LMH6657MG is well-suited for driving 12-bit, 10-MSPS ADC inputs. With 37 ns 0.1% settling time, 11 nV/√Hz input voltage noise, and 270-MHz bandwidth, it settles a full-scale step within one ADC sample period (100 ns) with margin. Its output swing of 0.8 V from rails into 2 kΩ ensures adequate headroom for typical ADC reference voltages, and THD of −55 dBc at 5 MHz prevents harmonic folding into the Nyquist band. TI's ADC driver selection guide (SBAA227) explicitly lists LMH6657MG for 10–25 MSPS SAR and pipeline ADCs.
LMH6657MG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 700V/µs
- Gain Bandwidth Product:
- 140 MHz
- -3db Bandwidth:
- 270 MHz
- Current - Input Bias:
- 5 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 6.5mA
- Current - Output / Channel:
- 110 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
LMH6657MG FAQ
1.How can I place an order for LMH6657MG through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6657MG 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 LMH6657MG reliable?
The price and inventory of LMH6657MG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6657MG is usually 5 days.
3.What payment methods are accepted for LMH6657MG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6657MG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6657MG?
LMH6657MG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6657MG 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 LMH6657MG?
For technical support, including LMH6657MG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6657MG requirements.
6.How does Aetrix verify that LMH6657MG is sourced from the original manufacturer or authorized distributors?
All LMH6657MG 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 LMH6657MG meets industry standards.
7.What is the process for return or replacement of LMH6657MG?
All LMH6657MG units undergo pre-shipment inspection (PSI). If there is an issue with LMH6657MG, 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 LMH6657MG part is unused and in its original packaging.
Return procedure for LMH6657MG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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