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Analog Devices Inc. LT1815CS5#TRMPBF
- Part No.:
- LT1815CS5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LT1815CS5#TRMPBF.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,383
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Product details
Overview
LT1815CS5#TRMPBF from Analog Devices (formerly Linear Technology) is a single-channel, high-speed, programmable-current operational amplifier in a 5-lead TSOT-23 package. It delivers 220MHz gain-bandwidth, 1500V/µs slew rate, and 6.5mA supply current per amplifier at ±5V supplies, with unity-gain stability and 6nV/√Hz input noise-optimized for video amplification, active filtering, and high-fidelity data acquisition systems.
For engineers reviewing the LT1815CS5#TRMPBF datasheet, LT1815CS5#TRMPBF pinout, LT1815CS5#TRMPBF application, or LT1815CS5#TRMPBF equivalent, key selection criteria include its programmable ISET pin for low-power mode (1.5mA), ±3.5V input common-mode range at ±5V supplies, 1.5mV max input offset voltage, and guaranteed operation from –40°C to 85°C in the industrial temperature grade.
Technical Context
The LT1815CS5#TRMPBF uses a voltage-feedback topology with current-feedback slewing characteristics, enabling fast transient response without sacrificing DC precision. Its input stage employs complementary NPN/PNP emitter followers for bias current cancellation, supporting differential input voltages up to ±6V (transient only) and delivering 50mA minimum output current into 100Ω loads.
It features an ISET pin that allows dynamic adjustment of supply current and bandwidth: full-speed mode (6.5mA, 220MHz GBW) with ≤75Ω to V–, or low-power mode (1.5mA, 55MHz GBW) with 40kΩ to V–. Output swing reaches ±3.5V into 100Ω at ±5V supplies, and 1V to 4V on single 5V with 100Ω load referenced to 2.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 220MHz - enables stable closed-loop operation at gains ≥1 with >100MHz signal bandwidth |
| Slew Rate | 1500V/µs - supports clean 5MHz, 2VP-P output into 100Ω with –70dB THD |
| Supply Current | 6.5mA per amplifier - configurable down to 1.5mA via ISET pin for power-sensitive applications |
| Input Offset Voltage | 1.5mV max - ensures <0.8mV error contribution with balanced 100Ω source impedances |
| Input Noise Density | 6nV/√Hz - preserves SNR in low-level signal conditioning stages |
| Output Drive | ±50mA min into 100Ω - drives coaxial cables, ADC inputs, and active filter stages directly |
| Operating Temp Range | –40°C to 85°C - qualified for industrial environments without derating |
Pinout & Package
LT1815CS5#TRMPBF is housed in a 5-lead plastic TSOT-23 (S5) package, 2.9mm × 1.6mm × 1.1mm, with exposed pad not internally connected. Thermal resistance θJA = 250°C/W with short PCB traces.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUT | Amplifier output | Capable of ±3.5V swing into 100Ω at ±5V supplies; requires 10Ω–50Ω series resistor for >10pF capacitive loads |
| 2 V– | Negative supply rail | Reference for ISET pin; must connect external programming resistor here for low-power mode |
| 3 +IN | Non-inverting input | Differential input stage accepts ±3.5V CMR at ±5V supplies; no external clamping needed for ±6V transients |
| 4 –IN | Inverting input | High-impedance node (1.5MΩ differential); sensitive to layout-short trace length critical for stability |
| 5 V+ | Positive supply rail | Supports ±1.25V to ±5.5V dual supplies or 2.5V to 5V single supply; bypass with 0.01µF ceramic |
Key Features
| Feature | Design Value |
|---|---|
| Programmable supply current | ISET pin enables seamless transition between full-speed (6.5mA) and low-power (1.5mA) modes without changing PCB layout |
| Unity-gain stable | Operates reliably at AV = 1 with minimal external compensation-reduces BOM count in buffer applications |
| Low distortion at high frequency | –70dB THD at 5MHz, 2VP-P into 100Ω enables broadcast-quality video signal paths |
| Wide input common-mode range | ±3.5V at ±5V supplies allows direct interfacing with ±3.3V logic and sensor outputs |
| High output drive capability | 50mA minimum into 100Ω supports driving long traces, multiple loads, or low-impedance ADC front-ends |
Applications
| Video Signal Buffering | High-Speed Data Acquisition |
|---|---|
Use Scenario: Driving 75Ω coaxial video lines from FPGA DAC outputs in medical imaging systems. IC Role / Device Role / Timing Role: Unity-gain buffer with low group delay and minimal differential gain/phase error (0.08%/0.04°). Use Value: Preserves NTSC/PAL timing integrity and color fidelity without external equalization. | Use Scenario: Conditioning analog sensor signals prior to 16-bit SAR ADC sampling at 1MSPS. IC Role / Device Role / Timing Role: Low-noise, fast-settling (15ns to 0.1%) driver for ADC input with 100Ω source impedance matching. Use Value: Enables full-resolution digitization of fast transients without aperture uncertainty penalty. |
| Active Anti-Aliasing Filter | Communications Baseband Amplifier |
Use Scenario: 5th-order elliptic low-pass filter stage in LTE base station receive chain. IC Role / Device Role / Timing Role: High-linearity, low-distortion op-amp in MFB topology with 200MHz GBW margin. Use Value: Achieves >80dB stopband rejection at 2× Nyquist while maintaining phase linearity across passband. | Use Scenario: IF amplifier in 2.4GHz Wi-Fi receiver front-end, amplifying 20MHz-wide QPSK baseband signals. IC Role / Device Role / Timing Role: Single-supply (5V) rail-to-rail output amplifier with 1V–4V swing referenced to 2.5V. Use Value: Maximizes dynamic range for ADC digitization while eliminating negative supply generation. |
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 |
|---|---|---|---|
| ADA4897-1ARJZ-R7 | Lower noise (4.5nV/√Hz), higher PSRR (105dB), but fixed 3.2mA supply current and no ISET pin | Lacks programmable power mode; better suited for ultra-low-noise, fixed-power systems | Select when lowest input noise dominates over power flexibility |
| LMH6629MA/NOPB | Higher slew rate (3800V/µs), wider GBW (1.5GHz), but 12.5mA supply current and SO-8 only | No low-power mode; requires larger PCB area and higher thermal management | Select when maximum speed and drive strength outweigh power and size constraints |
Compared with ADA4897-1ARJZ-R7 and LMH6629MA/NOPB, LT1815CS5#TRMPBF uniquely balances 220MHz bandwidth, 1500V/µs slew rate, and on-the-fly current programmability in a space-constrained 5-lead TSOT-23-making it optimal for battery-aware instrumentation and portable test equipment where dynamic power scaling is essential.
Availability
LT1815CS5#TRMPBF is available at Aetrix Electronics and suitable for video signal buffering, high-speed data acquisition, active filtering, and communications baseband amplification requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LT1815CS5#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 acquired Linear Technology in 2017 and maintains full product support, datasheets, and application engineering for legacy Linear parts including the LT1815 family.
The LT1815 series belongs to Linear Technology's high-speed precision op-amp product line, designed specifically for applications demanding both wide bandwidth and low distortion-such as video, instrumentation, and high-fidelity signal processing-without compromising DC accuracy or power efficiency.
FAQ
What is the function of the ISET pin on the LT1815CS5#TRMPBF?
The ISET pin on the LT1815CS5#TRMPBF controls amplifier supply current and bandwidth. Connecting it to V– through ≤75Ω enables full-speed mode (6.5mA, 220MHz GBW); using a 40kΩ resistor configures low-power mode (1.5mA, 55MHz GBW). This pin is exclusive to LT1815S6/LT1816A variants and is not present on SO-8 or MSOP versions of the LT1815.
Can the LT1815CS5#TRMPBF operate from a single 5V supply?
Yes, the LT1815CS5#TRMPBF is fully specified for single 5V operation. With a 100Ω load referenced to 2.5V, its output swings from 1V to 4V. Input common-mode range extends from 0.9V to 4.1V under these conditions, supporting direct interface with 3.3V logic and most ADC reference levels without level-shifting circuitry.
What is the maximum capacitive load the LT1815CS5#TRMPBF can drive stably?
The LT1815CS5#TRMPBF drives up to 10pF capacitively in unity-gain configuration without external compensation. For larger loads, a 10Ω–50Ω isolation resistor must be placed in series with the output-feedback still taken from the amplifier output-to prevent peaking or oscillation. Layout best practices (ground plane, short traces) remain critical for stability above 10pF.
How does the LT1815CS5#TRMPBF achieve low input offset voltage drift?
The LT1815CS5#TRMPBF achieves ≤15μV/°C input offset voltage drift over –40°C to 85°C by using a precision trimmed input stage on Linear Technology's low-voltage complementary bipolar process. This drift specification is guaranteed-not just typical-and applies across the full industrial temperature range, ensuring stable DC performance in unregulated thermal environments.
Is the LT1815CS5#TRMPBF pin-compatible with other LT1815 package variants?
No, the LT1815CS5#TRMPBF in 5-lead TSOT-23 (S5) is not pin-compatible with other LT1815 variants. The S6 (6-lead TSOT-23) adds the ISET pin, while SO-8, MSOP-8, and DFN-8 packages have different pinouts and lack the ISET functionality entirely. Migration requires PCB redesign and layout validation due to differing pin assignments and thermal characteristics.
LT1815CS5#TRMPBF 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:
- 1500V/µs
- Gain Bandwidth Product:
- 220 MHz
- -3db Bandwidth:
- 350 MHz
- Current - Input Bias:
- 2 µA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 6.5mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 11 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
LT1815CS5#TRMPBF FAQ
1.How can I place an order for LT1815CS5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1815CS5#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 LT1815CS5#TRMPBF reliable?
The price and inventory of LT1815CS5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1815CS5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT1815CS5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1815CS5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1815CS5#TRMPBF?
LT1815CS5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1815CS5#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 LT1815CS5#TRMPBF?
For technical support, including LT1815CS5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1815CS5#TRMPBF requirements.
6.How does Aetrix verify that LT1815CS5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT1815CS5#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 LT1815CS5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT1815CS5#TRMPBF?
All LT1815CS5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1815CS5#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 LT1815CS5#TRMPBF part is unused and in its original packaging.
Return procedure for LT1815CS5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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