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Analog Devices Inc. LT1812IS8#TRPBF
- Part No.:
- LT1812IS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1812IS8#TRPBF.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,118
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Product details
Overview
LT1812IS8#TRPBF from Analog Devices (formerly Linear Technology) is a high-speed, low-power voltage-feedback operational amplifier with shutdown control, 100MHz gain bandwidth, 750V/µs slew rate, and ±3.5V input common-mode range on ±5V supplies. It drives 100Ω loads to ±3.5V and remains stable with 1000pF capacitive loads-ideal for video buffering and active filter design.
For engineers reviewing the LT1812IS8#TRPBF datasheet, LT1812IS8#TRPBF pinout, LT1812IS8#TRPBF application, or LT1812IS8#TRPBF equivalent, key selection criteria include shutdown current (50µA), unity-gain stability, 8nV/√Hz input noise, rail-to-rail output swing on single 5V supply (1.1V–3.9V), and SO-8 package compatibility with industrial temperature range (–40°C to 85°C).
Technical Context
The LT1812IS8#TRPBF uses a hybrid voltage-feedback topology that delivers current-feedback-like slewing behavior via differential-input-driven current mirroring into a high-impedance gain node. Its internal RC compensation network dynamically adapts to capacitive loading, enabling stability with up to 1000pF in unity gain.
Shutdown is controlled by Pin 5 (SHDN), which reduces supply current to 50µA when pulled below V– + 0.4V; the output remains connected to inputs during shutdown, precluding use as a signal multiplexer. The device operates from ±1.25V to ±5.5V supplies or single 5V, with input bias currents canceling via complementary NPN/PNP input stage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 100MHz typical - supports closed-loop designs up to 10MHz at gain=10 without phase margin erosion. |
| Slew Rate | 750V/µs typical at AV = –1 - enables <30ns 0.1% settling for 5V steps, critical for pulse amplification. |
| Supply Current (Active) | 3.6mA max - low quiescent power enables battery-operated instrumentation front-ends. |
| Supply Current (Shutdown) | 50µA typical - reduces system standby power by >98% versus active mode. |
| Input Noise Voltage | 8nV/√Hz at 10kHz - preserves SNR in precision signal conditioning paths before ADCs. |
| Capacitive Load Drive | Stable with 1000pF - eliminates need for external isolation resistors when driving coaxial cables or ADC input capacitance. |
| Input Offset Voltage | 1.5mV max - ensures ≤15mV error in unity-gain buffer configurations across industrial temperature range. |
| Common-Mode Range | ±3.5V on ±5V supplies - accommodates signals near supply rails without clipping in sensor interface circuits. |
Pinout & Package
LT1812IS8#TRPBF is housed in an 8-lead plastic SO (Small Outline) package, 0.150-inch narrow body, with standard JEDEC MS-012AC footprint and 1.27mm pitch. Thermal resistance θJA = 150°C/W with standard PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SHDN) | Shutdown control input | Pulled ≥2V above V– to enable; ≤0.4V above V– to reduce supply current to 50µA; not isolated during shutdown. |
| 2 (V–) | Negative supply rail | Accepts –5V to –1.25V; serves as reference for SHDN threshold and input common-mode range. |
| 3 (+IN) | Non-inverting input | Differential NPN/PNP pair enables ±4µA max input bias current with polarity cancellation. |
| 4 (–IN) | Inverting input | High-impedance node (1.5MΩ min differential RIN) with 2pF input capacitance; tolerates ±3V transient differential voltage. |
| 5 (VOUT) | Amplifier output | Drives ±40mA min into 100Ω load; maintains 0.4Ω output impedance at 1MHz for low distortion cable driving. |
| 6 (V+) | Positive supply rail | Accepts +5V to +1.25V; PSRR ≥78dB ensures immunity to supply ripple in mixed-signal systems. |
| 7 (NC) | No connect | Internally unused; must remain unconnected per datasheet to avoid parasitic coupling. |
| 8 (NC) | No connect | Internally unused; no routing or grounding required; floating per manufacturer recommendation. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-feedback architecture with current-feedback slewing | Delivers 100MHz GBW and 750V/µs slew rate simultaneously-enables wideband signal integrity without trade-off between speed and stability. |
| Dynamic capacitive-load compensation | Internal RC network senses output pole and adds adaptive phase boost, ensuring stability with 1000pF in unity gain-eliminates external compensation components. |
| Industrial temperature grade (–40°C to 85°C) | Guaranteed performance over full range-including 1.5mV max VOS, 72dB min CMRR, and 60MHz GBW-supports deployment in automotive and industrial control environments. |
| Low-noise, low-distortion operation | 8nV/√Hz input noise and –76dB THD at 1MHz enable clean signal amplification in medical imaging and test equipment front-ends. |
| Single-supply capability | Output swings 1.1V to 3.9V on 5V supply with 100Ω load referenced to 2.5V-simplifies level-shifting in 3.3V/5V mixed-voltage systems. |
Applications
| Video Line Driver | High-Speed Data Acquisition Buffer |
|---|---|
Use Scenario: Driving 75Ω coaxial video lines in broadcast equipment with minimal overshoot and group delay variation. IC Role / Device Role / Timing Role: Unity-gain buffer with 1000pF load stability and 0.07° differential phase error at 1MHz. Use Value: Maintains broadcast-grade video fidelity without external termination resistors or peaking compensation networks. | Use Scenario: Isolating and amplifying analog sensor outputs prior to SAR ADC sampling in automated test systems. IC Role / Device Role / Timing Role: Low-noise, fast-settling driver (30ns to 0.1%) for 16-bit ADCs operating at ≥1MSPS. Use Value: Preserves ENOB by limiting input-referred noise to 8nV/√Hz and eliminating settling-induced aperture uncertainty. |
| Active Anti-Aliasing Filter | RF Signal Chain IF Amplifier |
Use Scenario: Implementing 4th-order Butterworth low-pass filtering at 4MHz cutoff in communication receivers. IC Role / Device Role / Timing Role: Dual-amplifier topology (per LT1813 dual version) configured as Sallen-Key stages with precise gain matching. Use Value: Achieves <0.12dB passband peaking and sharp roll-off without component tolerance sensitivity. | Use Scenario: Amplifying intermediate frequency (IF) signals in software-defined radio front-ends where linearity and bandwidth are critical. IC Role / Device Role / Timing Role: Fixed-gain (AV = 2) amplifier with –75dB THD and 55MHz full-power bandwidth at 1V peak. Use Value: Supports high dynamic range IF processing without intermodulation distortion degrading adjacent channel rejection. |
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 |
|---|---|---|---|
| ADA4897-1ARJZ-R7 | Lower noise (4nV/√Hz), lower supply current (1.4mA), but only 200MHz GBW and no shutdown pin. | Better for ultra-low-noise photodiode preamps; unsuitable where power cycling or 100MHz+ closed-loop bandwidth is required. | Select ADA4897-1 when noise dominates over power and bandwidth requirements; avoid if shutdown or >80MHz GBW needed. |
| OPA695ID | Current-feedback architecture, 1.7GHz GBW, 4300V/µs slew rate, but higher supply current (12.9mA) and no shutdown. | Superior for >100MHz fixed-gain RF amplification; incompatible with high-impedance sensor interfaces due to low input Z. | Choose OPA695ID for GHz-range CFB applications; reject for DC-coupled, low-bias, or low-power designs requiring VFB characteristics. |
Compared with ADA4897-1ARJZ-R7 and OPA695ID, LT1812IS8#TRPBF uniquely balances 100MHz bandwidth, 750V/µs slew, 50µA shutdown, and VFB input structure-making it optimal for industrial data acquisition where power efficiency, DC precision, and moderate RF performance intersect.
Availability
LT1812IS8#TRPBF is available at Aetrix Electronics and suitable for video line driving, high-speed data acquisition buffering, active filter implementation, and RF IF amplification requiring stable component supply across extended temperature ranges.
Supply support for LT1812IS8#TRPBF 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, formed through the acquisition of Linear Technology in 2017.
The LT1812IS8#TRPBF belongs to ADI's legacy Linear Technology high-speed op-amp product line, engineered specifically for applications demanding simultaneous wide bandwidth, fast settling, low distortion, and robust capacitive-load drive-targeting test & measurement, medical imaging, and communications infrastructure.
FAQ
What is the maximum capacitive load the LT1812IS8#TRPBF can drive while remaining stable?
The LT1812IS8#TRPBF is specified as stable with up to 1000pF capacitive load in unity-gain configuration. This capability stems from its internal adaptive compensation network, which senses the output pole and adds phase margin via bootstrapped RC feedback. Stability is maintained without external components, making it suitable for direct coaxial cable driving and ADC input buffering.
Does the LT1812IS8#TRPBF support single-supply operation, and what is its output swing on 5V?
Yes, the LT1812IS8#TRPBF operates on single 5V supply. With a 100Ω load referenced to 2.5V, its output swings from 1.1V to 3.9V-providing 2.8Vpp usable range. This rail-to-rail output behavior enables interfacing with 3.3V logic and successive-approximation ADCs without level-shifting circuitry.
How does the shutdown feature of the LT1812IS8#TRPBF behave, and what is its turn-on delay?
The LT1812IS8#TRPBF shutdown is activated by pulling Pin 5 (SHDN) below V– + 0.4V, reducing supply current to 50µA. Turn-on delay is typically 0.5µs, and turn-off delay is ~1µs. Critically, the output remains electrically connected to inputs during shutdown-so it cannot isolate signals or serve as a multiplexer.
What is the input offset voltage specification for the LT1812IS8#TRPBF over its full temperature range?
The LT1812IS8#TRPBF has a maximum input offset voltage of 3.5mV over the industrial temperature range (–40°C to 85°C), with a typical value of 0.4mV at 25°C. Input offset drift is specified at 10–30µV/°C, ensuring predictable error accumulation in precision DC-coupled gain stages.
Can the LT1812IS8#TRPBF be used in a comparator configuration?
No-the LT1812IS8#TRPBF is not designed for comparator use. Sustained large differential input voltages cause excessive power dissipation and potential damage. Its input stage lacks clamping diodes, and the internal compensation is optimized for linear closed-loop operation-not open-loop saturation recovery.
LT1812IS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 8-SO
LT1812IS8#TRPBF FAQ
1.How can I place an order for LT1812IS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1812IS8#TRPBF 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 LT1812IS8#TRPBF reliable?
The price and inventory of LT1812IS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1812IS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1812IS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1812IS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1812IS8#TRPBF?
LT1812IS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1812IS8#TRPBF 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 LT1812IS8#TRPBF?
For technical support, including LT1812IS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1812IS8#TRPBF requirements.
6.How does Aetrix verify that LT1812IS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1812IS8#TRPBF 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 LT1812IS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1812IS8#TRPBF?
All LT1812IS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1812IS8#TRPBF, 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 LT1812IS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1812IS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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