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Analog Devices Inc. LT1812IS5#TRPBF
- Part No.:
- LT1812IS5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LT1812IS5#TRPBF.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,836
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Product details
Overview
LT1812IS5#TRPBF from Analog Devices (formerly Linear Technology) is a single, rail-to-rail output, high-speed voltage-feedback operational amplifier with shutdown control, designed for precision analog signal conditioning in space-constrained systems. It delivers 100MHz gain bandwidth, 750V/µs slew rate, and 3.6mA supply current at ±5V, enabling fast settling (30ns to 0.1%) in active filters and video driver circuits.
For engineers reviewing the LT1812IS5#TRPBF datasheet, LT1812IS5#TRPBF pinout, LT1812IS5#TRPBF application, or LT1812IS5#TRPBF equivalent, key selection criteria include its 5-lead TSOT-23 package, –40°C to 85°C industrial temperature rating, shutdown functionality (not available on S5), and stability with 1000pF capacitive loads-critical for cable driver and buffer designs.
Technical Context
The LT1812IS5#TRPBF uses a voltage-feedback topology with current-feedback slewing behavior, achieved via complementary input emitter followers driving a 300Ω resistor and mirrored current into a high-impedance gain node. Its slew rate scales linearly with differential input voltage, peaking in unity-gain configurations.
Internal compensation senses load-induced output poles and adds adaptive capacitance via an RC network across the output stage, enabling unity-gain stability with up to 1000pF capacitive loads-unusual for a 100MHz op amp-and supporting direct coaxial cable driving with minimal external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 100MHz typical - enables stable closed-loop operation up to 10MHz at AV = 10 without phase margin degradation. |
| Slew Rate | 750V/µs typical at ±5V - supports full-scale 5V step response in ≤30ns, suitable for high-fidelity video and pulse amplification. |
| Supply Current | 3.6mA max in active mode, 50µA in shutdown - reduces power in battery-powered instrumentation during idle periods. |
| Input Offset Voltage | 1.5mV max at 25°C - ensures DC accuracy in precision transimpedance and sensor interface circuits. |
| Output Swing | ±3.5V into 100Ω with ±5V supplies - drives low-impedance loads such as 75Ω video lines or ADC input buffers directly. |
| Capacitive Load Drive | Stable with 1000pF - eliminates need for isolation resistors in high-capacitance applications like LCD column drivers or piezo actuator interfaces. |
| Input Noise Density | 8nV/√Hz at 10kHz - maintains signal integrity in low-level audio preamplifier and medical sensor front-ends. |
Pinout & Package
LT1812IS5#TRPBF is housed in a 5-lead plastic TSOT-23 (ThinSOT™) package, 1.00mm maximum height, with exposed pad not electrically connected. Pin 1 is VOUT, Pin 2 is V–, Pin 3 is +IN, Pin 4 is –IN, Pin 5 is V+. The S5 variant does not include a shutdown pin - it operates continuously and lacks SHDN functionality per datasheet Note 11.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Amplifier output | Delivers rail-to-rail swing (±3.5V into 100Ω); requires no series resistor for 75Ω cable drive when terminated properly. |
| V– (Pin 2) | Negative supply | Reference for internal biasing; connects to ground or negative rail; thermal pad connection improves θJA by reducing junction temperature rise. |
| +IN (Pin 3) | Non-inverting input | Base of NPN/PNP pair enabling bipolar input bias cancellation; withstands ±3V transient differential voltage without damage. |
| –IN (Pin 4) | Inverting input | Base of complementary transistor pair; input capacitance is 2pF - limits high-frequency noise gain if feedback resistors exceed 2kΩ without CF compensation. |
| V+ (Pin 5) | Positive supply | Accepts ±1.25V to ±5.5V total supply range; quiescent current increases linearly with supply voltage above ±2.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stability with 1000pF load | Eliminates external isolation resistors in video line drivers and capacitive sensor interfaces, preserving signal fidelity and simplifying layout. |
| Adaptive output-stage compensation | RC network unbootstraps under heavy capacitive loading to add phase margin, enabling robust stability across varying PCB trace capacitance and connector parasitics. |
| Bipolar input bias cancellation | NPN/PNP input pair yields ±4µA max input bias current with polarity that varies unit-to-unit - balanced source impedances minimize offset drift in precision integrators. |
| Low 8nV/√Hz input noise | Supports 16-bit+ dynamic range in data acquisition front-ends where SNR is limited by amplifier noise rather than ADC quantization. |
| 30ns 0.1% settling time | Meets timing budgets in multiplexed ADC sampling systems requiring rapid channel switching and full-scale step response. |
Applications
| Video Line Driver | Active Low-Pass Filter |
|---|---|
Use Scenario: Driving 75Ω coaxial video cables in broadcast equipment or medical imaging displays. IC Role / Device Role / Timing Role: Buffer amplifier with unity-gain configuration, delivering undistorted 2VP-P signals up to 10MHz while maintaining <0.22% differential gain error. Use Value: Direct drive capability eliminates external series termination, reducing BOM count and board area while preserving rise time (<2ns) and settling accuracy (0.1% in 30ns). | Use Scenario: 4th-order Butterworth anti-aliasing filter preceding a 10MSPS SAR ADC in industrial data loggers. IC Role / Device Role / Timing Role: Gain stage and output buffer in cascaded Sallen-Key topology, operating at 4MHz cutoff with <0.12dB passband peaking. Use Value: 100MHz GBW ensures filter Q-factor remains stable across temperature, and 750V/µs slew rate prevents distortion on fast transient inputs. |
| Cable-Equalized Signal Amplifier | High-Speed Transimpedance Amplifier |
Use Scenario: Compensating high-frequency loss in long USB 2.0 or LVDS interconnects within embedded test instruments. IC Role / Device Role / Timing Role: Post-equalization gain block restoring signal amplitude and edge integrity after 2m of 90Ω twisted-pair cable. Use Value: Stability with 1000pF load allows integration of equalization RC networks directly at the output without oscillation risk, enabling compact, integrated EQ solutions. | Use Scenario: Converting photodiode current (10nA–10µA) to voltage in optical smoke detectors with <10µs response requirement. IC Role / Device Role / Timing Role: Transimpedance amplifier with 100kΩ feedback resistor, configured for 10MHz bandwidth and minimal input capacitance (2pF). Use Value: Low input bias current (±4µA max) and 8nV/√Hz noise ensure sub-100nA detection thresholds; 30ns settling enables rapid alarm assertion. |
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-R7 | Lower 1nV/√Hz noise, 220MHz GBW, but only 125V/µs slew rate; requires dual supply for full rail-to-rail output swing. | Better for low-noise RF/IF gain stages; less suitable for fast large-signal video buffering where slew-limited distortion must be avoided. | Select ADA4897-1ARMZ-R7 when noise dominates system SNR and bandwidth >100MHz is required; avoid when 750V/µs slew is needed for 5V-step fidelity. |
| LMH6629MA/NOPB | Higher 4000V/µs slew rate and 1.5GHz GBW, but 12mA supply current and no shutdown; specified only for 0°C to 70°C. | Preferred for ultra-fast pulse amplification in test equipment; unsuitable for battery-powered or extended-temperature industrial use. | Select LMH6629MA/NOPB for sub-10ns transient response in lab-grade instruments; avoid LT1812IS5#TRPBF replacement where ambient exceeds 85°C or shutdown is mandatory. |
Compared with ADA4897-1ARMZ-R7 and LMH6629MA/NOPB, the LT1812IS5#TRPBF uniquely balances 100MHz bandwidth, 750V/µs slew, 3.6mA supply current, and industrial temperature rating in a 5-lead TSOT-23 - making it optimal for cost-sensitive, space-constrained video and filter applications where moderate noise and guaranteed shutdown are essential.
Availability
LT1812IS5#TRPBF is available at Aetrix Electronics and suitable for video line drivers, active filters, and high-speed transimpedance amplifiers requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LT1812IS5#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 LT1812 product line was developed by Linear Technology to address high-speed precision amplification needs in instrumentation, video, and communications systems where bandwidth, slew rate, and capacitive load drive must coexist in miniature packages.
FAQ
Does the LT1812IS5#TRPBF have a shutdown pin?
No, the LT1812IS5#TRPBF does not include a shutdown pin. Per datasheet Note 11, the 5-lead TSOT-23 (S5) package variant lacks SHDN functionality and operates continuously. Shutdown is only available on the 6-lead (S6) and 8-lead (S8) versions of the LT1812. The LT1812IS5#TRPBF draws 3.6mA typical supply current at all times.
What is the maximum capacitive load the LT1812IS5#TRPBF can drive stably?
LT1812IS5#TRPBF is specified to remain unity-gain stable with up to 1000pF capacitive load, a key differentiator for high-speed op amps. This capability is enabled by internal adaptive compensation that senses output pole shifts and adds phase margin via an unbootstrapped RC network. For loads exceeding 1000pF, external isolation resistors may be required to maintain stability.
Can the LT1812IS5#TRPBF operate from a single 5V supply?
Yes, LT1812IS5#TRPBF is fully specified for single 5V operation. With a 100Ω load referenced to 2.5V, its output swings from 1.1V to 3.9V. Input common-mode range extends from 1.5V to 3.5V under these conditions, supporting rail-to-rail input/output operation in modern low-voltage systems such as portable medical devices and IoT sensor nodes.
What is the input bias current polarity of the LT1812IS5#TRPBF?
The input bias current of LT1812IS5#TRPBF can be either positive or negative due to inherent NPN/PNP beta mismatch in its complementary input stage. Datasheet specifies ±4µA maximum magnitude but does not guarantee polarity. For DC-critical applications like precision integrators, use matched source impedances on both inputs to minimize offset voltage drift caused by bias current imbalance.
How does the slew rate of the LT1812IS5#TRPBF vary with gain configuration?
LT1812IS5#TRPBF's slew rate is proportional to differential input voltage, so it is highest in low-gain configurations. At AV = –1, typical slew rate is 750V/µs; at higher gains (e.g., AV = 10), the same output step produces smaller input differential voltage, reducing effective slew rate. This behavior is intrinsic to its current-driven gain node architecture and is documented in the "Slew Rate vs Input Level" graph (Figure 1812 G24).
LT1812IS5#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- 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-23-5
LT1812IS5#TRPBF FAQ
1.How can I place an order for LT1812IS5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1812IS5#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 LT1812IS5#TRPBF reliable?
The price and inventory of LT1812IS5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1812IS5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1812IS5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1812IS5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1812IS5#TRPBF?
LT1812IS5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1812IS5#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 LT1812IS5#TRPBF?
For technical support, including LT1812IS5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1812IS5#TRPBF requirements.
6.How does Aetrix verify that LT1812IS5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1812IS5#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 LT1812IS5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1812IS5#TRPBF?
All LT1812IS5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1812IS5#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 LT1812IS5#TRPBF part is unused and in its original packaging.
Return procedure for LT1812IS5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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