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Analog Devices Inc. LT1815IS6#TRMPBF
- Part No.:
- LT1815IS6#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT1815IS6#TRMPBF.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,295
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Product details
Overview
LT1815IS6#TRMPBF from Analog Devices (formerly Linear Technology) is a single-channel, programmable-current, high-speed voltage-feedback operational amplifier in a 6-lead TSOT-23 package. It delivers 220MHz gain-bandwidth, 1500V/µs slew rate, and 6.5mA supply current at ±5V, with low 1.5mV max input offset and 6nV/√Hz input noise - enabling precision video buffering, active filter design, and high-fidelity data acquisition front-ends.
For engineers reviewing the LT1815IS6#TRMPBF datasheet, LT1815IS6#TRMPBF pinout, LT1815IS6#TRMPBF application, or LT1815IS6#TRMPBF equivalent, this page provides verified electrical specifications, thermal performance data, ISET-programmable current modes, and real-world design guidance for ±5V and single 5V supply operation - all validated against the official LTC 181567fb datasheet.
Technical Context
The LT1815IS6#TRMPBF uses a voltage-feedback topology with current-feedback slewing characteristics, enabling unity-gain stability while sustaining full-speed performance across ±5V and single 5V supplies. Its dual-input NPN/PNP emitter-follower stage provides first-order bias current cancellation and supports ±3.5V common-mode input range at ±5V supplies.
Programmable current control is implemented via the ISET pin: connecting it to V– through ≤75Ω enables full-speed mode (6.5mA, 220MHz GBW), while a 40kΩ resistor reduces supply current to 1.5mA and GBW to 30MHz - preserving DC accuracy (2mV offset) while cutting power by >75%.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 220MHz (full-speed mode); enables stable closed-loop gain ≥10 at 20MHz or ≥2 at 100MHz |
| Slew Rate | 1500V/µs (AV = –1, ±5V); supports 6VP-P full-power bandwidth of 80MHz for fast transient response |
| Supply Current | 6.5mA per amplifier (full-speed); 1.5mA (low-power mode with 40kΩ ISET-to-V–) |
| Input Offset Voltage | 1.5mV max (–40°C to 85°C); ensures <0.3% error in 12-bit ADC driver applications |
| Input Noise Density | 6nV/√Hz at 10kHz; contributes <1.2µV RMS integrated noise over 10MHz bandwidth |
| Output Drive | ±50mA min into 100Ω load; delivers ±3.5V swing at ±5V supplies with <0.1% THD at 5MHz |
| Operating Temperature | –40°C to +85°C (industrial grade); validated across full range for automotive sensor interfaces |
Pinout & Package
LT1815IS6#TRMPBF is housed in a 6-lead plastic TSOT-23 (S6) package, 2.9mm × 1.6mm × 1.1mm, with exposed pad thermally connected to V–. Pin 1 is OUT; Pin 2 is V–; Pin 3 is +IN; Pin 4 is V+; Pin 5 is –IN; Pin 6 is ISET. The ISET pin enables external resistor programming of supply current and bandwidth.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Amplifier output | Capable of ±50mA drive into 100Ω; rail-to-rail swing limited to ±3.5V on ±5V supplies |
| V– (Pin 2) | Negative supply terminal | Internally tied to underside metal in S6 package; must connect ISET resistor here for current programming |
| +IN (Pin 3) | Non-inverting input | Differential pair base node; supports ±3.5V CMR at ±5V; requires balanced source impedance for <80μV offset contribution |
| V+ (Pin 4) | Positive supply terminal | Accepts up to +6.3V (absolute max); bypass with 0.01µF ceramic directly at pin for stability |
| –IN (Pin 5) | Inverting input | Feedback node; sensitive to parasitic capacitance - minimize trace length to prevent peaking/oscillation |
| ISET (Pin 6) | Supply current programming | Current-sink node; 0–40kΩ to V– sets supply current from 2.0mA to 6.5mA and GBW from 50MHz to 220MHz |
Key Features
| Feature | Design Value |
|---|---|
| Programmable supply current | Adjustable from 1.5mA to 6.5mA via external ISET resistor - enables dynamic power/speed trade-off without changing layout |
| High slew rate with low distortion | 1500V/µs slew and –70dB THD at 5MHz enable clean 1080p video signal amplification without post-filtering |
| Unity-gain stable architecture | No external compensation required for AV ≥ 1; simplifies PCB layout and reduces BOM count in buffer applications |
| Wide supply range support | Operates from ±1.25V to ±5.5V or single 2.5V to 5V; compatible with mixed-voltage systems including 3.3V logic interfaces |
| Robust input protection | Withstands ±6V differential input transients without clamping - eliminates need for external series resistors in noisy environments |
Applications
| Video Line Driver | High-Speed ADC Driver |
|---|---|
|
Use Scenario: Driving 75Ω coaxial cable in HD video routing equipment with minimal group delay variation. IC Role / Device Role / Timing Role: Unity-gain buffer with low output impedance (0.2Ω) and 350MHz –3dB bandwidth. Use Value: Maintains <0.08% differential gain and 0.04° differential phase error at 5MHz, meeting SMPTE 259M broadcast standards. |
Use Scenario: Conditioning analog signals before 12-bit, 10MSPS SAR ADCs in test instrumentation. IC Role / Device Role / Timing Role: Gain-of-2 amplifier with 15ns settling time to 0.1% and low 6nV/√Hz noise. Use Value: Enables ENOB >11.2 bits by contributing <0.5LSB noise and <0.05% nonlinearity over full temperature range. |
| Active Low-Pass Filter | Optical Transimpedance Amplifier |
|
Use Scenario: 5th-order Butterworth anti-aliasing filter in medical ultrasound front-end with 20MHz cutoff. IC Role / Device Role / Timing Role: High-GBW op-amp configured as MFB topology stage with 220MHz open-loop bandwidth. Use Value: Achieves <–80dB stopband attenuation at 40MHz while maintaining phase linearity within ±2° across passband. |
Use Scenario: Converting photodiode current to voltage in fiber-optic receiver modules operating at 1Gbps. IC Role / Device Role / Timing Role: Transimpedance amplifier with 1kΩ feedback resistor and 1.5pF compensation. Use Value: Delivers 1.2GHz gain-bandwidth product margin for 1.5ns rise time and <10ps timing jitter at 100mV output swing. |
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 1nV/√Hz noise, fixed 12mA supply current, no ISET pin; 200MHz GBW, 275V/µs slew | Better SNR in low-noise preamp stages; unsuitable where dynamic power scaling is required | Select when ultra-low noise dominates over programmability and power efficiency |
| LMH6629MA/NOPB | Higher 2.5mA input bias current, no low-power mode, 1.5GHz GBW, 3000V/µs slew; SO-8 only | Superior speed for RF IF amplification; lacks rail-swing capability and industrial temp grade | Select for >500MHz small-signal gain applications where ±40°C to +85°C operation is not mandatory |
Compared with ADA4897-1ARJZ-R7 and LMH6629MA/NOPB, the LT1815IS6#TRMPBF uniquely balances programmable power, industrial temperature rating, and 220MHz bandwidth in a space-constrained TSOT-23 - making it optimal for portable test gear and battery-powered signal chains requiring runtime-adjustable performance.
Availability
LT1815IS6#TRMPBF is available at Aetrix Electronics and suitable for video line drivers, high-speed ADC front-ends, and active filter designs requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LT1815IS6#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 technical support, manufacturing continuity, and qualification for all LTC op-amps including the LT1815 family.
The LT1815 series was designed for high-fidelity, wideband signal conditioning in space- and power-constrained systems - targeting video, communications, and precision data acquisition where speed, accuracy, and thermal efficiency must coexist.
FAQ
What is the maximum supply voltage for LT1815IS6#TRMPBF?
The LT1815IS6#TRMPBF has an absolute maximum total supply voltage of 12.6V (V+ to V–). It is fully specified and characterized for operation at ±5V (10V total) and single 5V supplies. Operation beyond ±5.5V or above 12.6V risks permanent damage per Absolute Maximum Ratings in the LTC 181567fb datasheet.
How does the ISET pin function in LT1815IS6#TRMPBF?
The ISET pin on the LT1815IS6#TRMPBF sinks current to program supply current and bandwidth. Connecting it to V– via ≤75Ω enables full-speed mode (6.5mA, 220MHz GBW); using a 40kΩ resistor reduces current to 1.5mA and GBW to 30MHz. The ISET pin current is –175μA typical at 25°C, and must never be left floating.
Can LT1815IS6#TRMPBF operate from a single 3.3V supply?
Yes - the LT1815IS6#TRMPBF is specified down to ±1.25V supplies and operates reliably from a single 3.3V supply. At 3.3V, it delivers ±1.2V output swing into 100Ω (VCM = 1.65V), 140MHz GBW, and 750V/µs slew rate. Input common-mode range extends from 0.9V to 2.4V, supporting direct interfacing with 3.3V logic and ADCs.
What is the thermal resistance (θJA) of LT1815IS6#TRMPBF in its S6 package?
The LT1815IS6#TRMPBF in the 6-lead TSOT-23 (S6) package has a specified θJA of 230°C/W under standard JEDEC test conditions (2squares, 1oz copper). With a 25mm² thermal pad connected to internal ground plane, θJA can be reduced to ~120°C/W - critical for sustaining 6.5mA operation at 85°C ambient without exceeding 150°C junction limit.
Does LT1815IS6#TRMPBF require external compensation for unity-gain stability?
No - the LT1815IS6#TRMPBF is unity-gain stable and requires no external compensation capacitors in AV = 1 configurations. Its internal compensation ensures phase margin >60° at unity gain. However, when driving >10pF capacitive loads, a 10Ω–50Ω isolation resistor between output and load is recommended to maintain stability and suppress ringing.
LT1815IS6#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:
- 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LT1815IS6#TRMPBF FAQ
1.How can I place an order for LT1815IS6#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1815IS6#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 LT1815IS6#TRMPBF reliable?
The price and inventory of LT1815IS6#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1815IS6#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT1815IS6#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1815IS6#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1815IS6#TRMPBF?
LT1815IS6#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1815IS6#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 LT1815IS6#TRMPBF?
For technical support, including LT1815IS6#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1815IS6#TRMPBF requirements.
6.How does Aetrix verify that LT1815IS6#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT1815IS6#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 LT1815IS6#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT1815IS6#TRMPBF?
All LT1815IS6#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1815IS6#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 LT1815IS6#TRMPBF part is unused and in its original packaging.
Return procedure for LT1815IS6#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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