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Analog Devices Inc. LT1812IS6#TRMPBF
- Part No.:
- LT1812IS6#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT1812IS6#TRMPBF.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:242
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Product details
Overview
LT1812IS6#TRMPBF from Analog Devices (acquired Linear Technology) is a high-speed, low-power voltage-feedback operational amplifier with shutdown control, 100MHz gain bandwidth, 750V/µs slew rate, and 3.6mA max supply current. It operates from ±5V or single 5V supplies, delivers ±3.5V output swing into 100Ω, and supports stable operation with 1000pF capacitive loads-ideal for video buffers, active filters, and cable drivers.
For engineers reviewing the LT1812IS6#TRMPBF datasheet, LT1812IS6#TRMPBF pinout, LT1812IS6#TRMPBF application, or LT1812IS6#TRMPBF equivalent, key selection criteria include shutdown current (50μA), input offset voltage (≤3.5mV at –40°C to 85°C), CMRR (≥70dB), SOT-23-6 thermal performance (θJA = 230°C/W), and unity-gain stability with capacitive loads.
Technical Context
The LT1812IS6#TRMPBF uses a voltage-feedback topology with current-feedback slewing behavior, enabled by differential input stage current mirroring and adaptive RC compensation that senses load-induced poles. Its shutdown pin (Pin 5) reduces supply current to 50μA while maintaining input-to-output continuity-unsuitable for multiplexing but effective for power gating in portable systems.
It achieves 30ns settling to 0.1% for 5V steps and drives 100Ω loads across full output swing under ±5V supplies. Stability with 1000pF capacitive loads is achieved via bootstrapped RC network that adds phase margin without external compensation, distinguishing it from conventional VFB op-amps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 100MHz typical - enables stable closed-loop operation up to 10MHz at G = 10, supporting wideband signal conditioning. |
| Slew Rate | 750V/µs typical - ensures distortion-free amplification of fast transients like video sync pulses or ADC driver edges. |
| Supply Current (Active) | 3.6mA maximum - allows battery-powered instrumentation with >100-hour runtime on 3.6Ah cells. |
| Supply Current (Shutdown) | 50μA typical - reduces system standby power by >98% versus active mode, critical for always-on sensor nodes. |
| Input Offset Voltage | 3.5mV maximum (–40°C to 85°C) - supports DC-coupled precision gain stages with <0.1% error in 100mV full-scale systems. |
| Capacitive Load Drive | Stable with 1000pF - eliminates need for isolation resistors when driving coaxial cables or ADC input capacitance directly. |
| Output Swing (±5V, 100Ω) | ±3.5V minimum - delivers 7Vpp dynamic range into standard termination impedances, meeting SMPTE video level requirements. |
| Settling Time | 30ns to 0.1% (5V step) - satisfies high-speed data acquisition timing budgets for 33MSPS+ sampling systems. |
Pinout & Package
LT1812IS6#TRMPBF is housed in a 6-lead Plastic TSOT-23 package (JEDEC MO-193), 1.00mm max height, with exposed pad not connected internally. Thermal resistance θJA = 230°C/W enables 108mW max power dissipation at 70°C ambient with minimal PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Amplifier output | Drives 100Ω loads to ±3.5V; requires series resistor for 75Ω coaxial cable drive to prevent reflections. |
| V– (Pin 2) | Negative supply | Reference for shutdown threshold (SHDN < V– + 0.4V disables amplifier); must be decoupled with 0.1µF ceramic. |
| +IN (Pin 3) | Non-inverting input | Differential pair base node; balanced source impedance recommended to minimize offset drift from bias current mismatch. |
| –IN (Pin 4) | Inverting input | Feedback node; input capacitance (2pF) forms pole with feedback resistors >2kΩ, requiring CF compensation per layout guidelines. |
| SHDN (Pin 5) | Shutdown control | CMOS-compatible input; pulls internal bias current sources offline, reducing IS to 50μA without disconnecting output path. |
| V+ (Pin 6) | Positive supply | Accepts ±1.25V to ±5.5V total supply; bypass with 0.1µF RF capacitor and 1–10µF low-ESR tantalum for high-current transient support. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable architecture | Operates without external compensation at G = 1, simplifying design of voltage followers and active filters with minimal component count. |
| 1000pF capacitive load tolerance | Enables direct connection to ADC inputs, long traces, or coaxial cables without stability risk-reducing BOM and layout complexity. |
| Low 8nV/√Hz input noise | Maintains SNR >70dB in 10MHz bandwidth applications like ultrasound front-ends or precision sensor amplifiers. |
| 30ns 0.1% settling time | Supports 33MSPS+ data acquisition systems where aperture uncertainty must remain below 30ps RMS. |
| Shutdown current ≤50μA | Extends battery life in portable test equipment by enabling per-channel power gating during idle intervals. |
| Specified over –40°C to 85°C | Guaranteed performance for industrial automation, automotive infotainment, and outdoor communications hardware. |
Applications
| Video Line Driver | High-Speed Data Acquisition |
|---|---|
Use Scenario: Driving 75Ω coaxial cable in SD/HD video distribution systems with DC-coupled sync signals. IC Role / Device Role / Timing Role: Buffer amplifier with rail-to-rail output swing and 100MHz bandwidth to preserve rise/fall times of composite video waveforms. Use Value: Eliminates external AC coupling capacitors and termination resistors, reducing board area by 30% and enabling single-supply 5V operation. | Use Scenario: Front-end gain stage before a 12-bit, 40MSPS ADC in automated test equipment. IC Role / Device Role / Timing Role: Low-noise, fast-settling driver ensuring <0.5 LSB integral nonlinearity error across full input range. Use Value: 30ns settling and 8nV/√Hz noise enable ENOB ≥11.2 bits at 10MHz input frequency without averaging. |
| Active Low-Pass Filter | Cable Equalization |
Use Scenario: 4th-order Butterworth anti-aliasing filter with 4MHz cutoff in medical imaging signal chains. IC Role / Device Role / Timing Role: Dual-amplifier topology (per LT1813 reference) implementing gain and feedback networks with minimal phase distortion. Use Value: Unity-gain stability and 100MHz GBW allow precise filter response shaping up to 10× cutoff frequency without peaking. | Use Scenario: Compensating high-frequency loss in 100m CAT5e Ethernet cable for analog sensor bus extension. IC Role / Device Role / Timing Role: Peaking equalizer stage with adjustable zero/pole placement using feedback network components. Use Value: 750V/µs slew rate preserves edge integrity of 10Mbps digital sensor outputs after 100m transmission. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4897-1ARMZ | Lower 1nV/√Hz noise, 220MHz GBW, but only 125V/µs slew rate and no shutdown pin. | Better for low-noise photodiode preamps; unsuitable where fast slewing or power gating is required. | Select ADA4897-1ARMZ when noise dominates over speed and shutdown is unnecessary. |
| OPA695IDBVR | Higher 3.5GHz GBW and 4300V/µs slew rate, but 12.5mA supply current and no shutdown. | Targeted at RF IF amplification; excessive power draw makes it impractical for portable battery systems. | Choose OPA695IDBVR only for >500MHz small-signal gain applications where power is unconstrained. |
Compared with ADA4897-1ARMZ and OPA695IDBVR, LT1812IS6#TRMPBF uniquely balances 100MHz bandwidth, 750V/µs slew rate, 50μA shutdown current, and unity-gain stability-making it optimal for space-constrained, battery-aware high-speed analog signal paths requiring both precision and efficiency.
Availability
LT1812IS6#TRMPBF is available at Aetrix Electronics and suitable for video line drivers, high-speed data acquisition systems, active filter designs, and cable equalization circuits requiring stable component supply across industrial temperature ranges.
Supply support for LT1812IS6#TRMPBF 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
Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT1812IS6#TRMPBF belongs to Linear Technology's precision high-speed op-amp product line, designed specifically for applications demanding wide bandwidth, low distortion, and robust capacitive load drive capability in compact packages.
FAQ
What is the maximum capacitive load the LT1812IS6#TRMPBF can drive while remaining stable?
The LT1812IS6#TRMPBF is specified stable with up to 1000pF capacitive load in unity-gain configuration. This capability is achieved through internal adaptive compensation that senses the load-induced pole and adds phase margin via a bootstrapped RC network. For loads exceeding 1000pF, external isolation resistors or reduced closed-loop gain may be required to maintain stability.
Does the LT1812IS6#TRMPBF support single-supply operation?
Yes, the LT1812IS6#TRMPBF operates from a single 5V supply. Under this condition, the output swings from 1.1V to 3.9V into a 100Ω load referenced to 2.5V, and input common-mode range extends from 1.5V to 3.5V. The device maintains 100MHz gain bandwidth and 30ns settling time, making it suitable for single-supply data acquisition and portable instrumentation.
What is the function of the SHDN pin on the LT1812IS6#TRMPBF, and how does it affect output behavior?
The SHDN pin (Pin 5) disables the LT1812IS6#TRMPBF's internal bias current sources, reducing supply current to 50μA. However, the output remains electrically connected to the inputs-meaning it does not isolate the output during shutdown. In an AV = 1 configuration with 1V DC input, the LT1812IS6#TRMPBF still delivers ~2mA into a 100Ω load, so external switching is needed for true signal blocking.
How does the LT1812IS6#TRMPBF achieve its 750V/µs slew rate while maintaining low input bias current?
The LT1812IS6#TRMPBF achieves high slew rate through a voltage-feedback architecture with current-feedback slewing behavior: the differential input voltage develops current across a 300Ω internal resistor, which is mirrored to charge the gain-node capacitance. Input bias current remains low (±4μA max) due to complementary NPN/PNP input stage with first-order cancellation, independent of the slew-rate current path.
Is the LT1812IS6#TRMPBF pin-compatible with other members of the LT181x family?
No-the LT1812IS6#TRMPBF (6-pin TSOT-23) is not pin-compatible with the LT1812IS5#TRMPBF (5-pin TSOT-23, no shutdown) or LT1812IS8#PBF (8-pin SO-8). The S6 package adds SHDN functionality absent in S5, and pin assignments differ: S5 has V+, –IN, +IN, V–, VOUT; S6 adds SHDN as Pin 5 and reorders V+ to Pin 6. Board redesign is required for substitution.
LT1812IS6#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 750V/µs
- Gain Bandwidth Product:
- 100 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 900 nA
- Voltage - Input Offset:
- 400 µV
- Current - Supply:
- 3mA
- Current - Output / Channel:
- 60 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 12.6 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LT1812IS6#TRMPBF FAQ
1.How can I place an order for LT1812IS6#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1812IS6#TRMPBF 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 LT1812IS6#TRMPBF reliable?
The price and inventory of LT1812IS6#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1812IS6#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT1812IS6#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1812IS6#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1812IS6#TRMPBF?
LT1812IS6#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1812IS6#TRMPBF 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 LT1812IS6#TRMPBF?
For technical support, including LT1812IS6#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1812IS6#TRMPBF requirements.
6.How does Aetrix verify that LT1812IS6#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT1812IS6#TRMPBF 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 LT1812IS6#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT1812IS6#TRMPBF?
All LT1812IS6#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1812IS6#TRMPBF, 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 LT1812IS6#TRMPBF part is unused and in its original packaging.
Return procedure for LT1812IS6#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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