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Analog Devices Inc. LTC6261IS6#TRPBF
- Part No.:
- LTC6261IS6#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC6261IS6#TRPBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,945
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Product details
Overview
LTC6261IS6#TRPBF from Analog Devices is a single-channel, rail-to-rail input/output operational amplifier optimized for micropower, low-noise, and wide supply voltage operation. It delivers 30MHz gain-bandwidth, 7V/µs slew rate, 240µA quiescent current, 400µV max offset voltage, and drives up to 1nF capacitive loads - enabling precision signal conditioning in battery-powered instrumentation and automotive sensor interfaces.
For engineers reviewing the LTC6261IS6#TRPBF datasheet, LTC6261IS6#TRPBF pinout, LTC6261IS6#TRPBF application, or LTC6261IS6#TRPBF equivalent, key selection criteria include its 1.8V–5.25V supply range, –40°C to 85°C industrial temperature grade, TSOT-23-6 package, shutdown capability (10µA), and verified performance as an ADC driver for SAR converters like LTC2362.
Technical Context
The LTC6261IS6#TRPBF employs a dual-input-stage architecture (PNP + NPN) to achieve rail-to-rail input operation across its full common-mode range (–0.1V to VS + 0.1V), with automatic input stage switching near VS. Its patented bias current cancellation maintains ≤100nA input bias current over 0.2V–(VS–0.2V) common-mode range.
Internal compensation ensures unity-gain stability with ≥1nF capacitive loads, while the output stage uses a rail-to-rail common-emitter topology delivering ≥±10mA drive and output swing within 100mV of either rail at 100µA load - critical for low-voltage data acquisition systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 30MHz - enables stable closed-loop operation up to ~2MHz in G=10 configuration for anti-aliasing filter design. |
| Supply Current per Amplifier | 240µA max - supports >1-year battery life in coin-cell-powered portable instruments at 3.3V. |
| Input Offset Voltage | 400µV max - ensures <0.1% gain error in 4.096V reference-based 12-bit ADC front-ends. |
| Capacitive Load Drive | 1nF - eliminates need for external isolation resistors when driving ADC input capacitance or long PCB traces. |
| Input Voltage Range | –0.1V to VS + 0.1V - allows true ground-sensing and overvoltage-tolerant interfacing with sensors. |
| Shutdown Current | 10µA max - reduces system standby power by >95% versus active mode in duty-cycled measurement systems. |
| CMRR / PSRR | 100dB / 95dB - rejects noise from shared 3.3V digital rails in mixed-signal embedded controllers. |
Pinout & Package
6-Lead TSOT-23 (S6) package: 2mm × 2mm × 0.8mm, exposed pad connected to V–, RoHS-compliant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V+ | Positive supply rail - accepts 1.8V–5.25V; requires local 0.1µF bypass to V–. |
| 2 | SHDN | Active-low shutdown control - <0.6V relative to V– disables amplifier; high-impedance output state. |
| 3 | –IN | Inverting input - rail-to-rail common-mode range; differential input voltage limited to ±3.6V. |
| 4 | OUT | Amplifier output - rail-to-rail swing; capable of sourcing/sinking ≥10mA into resistive loads. |
| 5 | V– | Negative supply rail - typically ground; must be connected and bypassed; exposed pad tied to this pin. |
| 6 | +IN | Non-inverting input - identical voltage range and protection as –IN; matched input capacitance (0.4pF diff). |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O with extended input range | Operates with inputs 100mV beyond rails and outputs within 100mV of rails at light loads - simplifies level-shifting in 1.8V/3.3V systems. |
| 1nF capacitive load stability | Eliminates need for output series resistance in ADC driver applications - preserves bandwidth and THD performance. |
| Low 13nV/√Hz input voltage noise | Enables high-resolution (<16-bit ENOB) signal chain design without adding noise-amplifying gain stages. |
| Shutdown with high-Z output | Allows safe multiplexing of multiple LTC6261IS6#TRPBF outputs onto shared analog buses without interaction. |
| 1.8V minimum supply voltage | Supports direct interface with Li-ion battery discharge curves (down to 2.5V) and energy-harvesting sources. |
Applications
| Micropower Active Filters | Portable Instrumentation |
|---|---|
Use Scenario: 2nd-order Sallen-Key low-pass filter for ECG front-end with cutoff at 150Hz. IC Role / Device Role / Timing Role: Precision gain-setting and buffering stage with minimal DC offset drift. Use Value: 240µA supply current extends disposable patch battery life to >7 days; 400µV VOS avoids baseline wander correction. |
Use Scenario: Signal conditioning for handheld pH meter using glass electrode with >1GΩ source impedance. IC Role / Device Role / Timing Role: Low-bias-current buffer amplifying mV-level electrode potential before ADC sampling. Use Value: ≤100nA input bias current prevents >10mV error across 100MΩ electrode resistance; rail-to-rail input captures full pH range. |
| Battery-Powered Sensor Nodes | Automotive Cabin Sensors |
Use Scenario: Temperature and humidity sensing node powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Low-power signal amplifier driving SAR ADC during brief wake-up intervals. Use Value: 10µA shutdown current enables >2-year shelf life; 30MHz GBW supports fast settling for burst-mode measurements. |
Use Scenario: Occupancy detection via IR thermopile in automotive HVAC control module. IC Role / Device Role / Timing Role: DC-coupled amplifier conditioning µV-level thermopile output with high CMRR. Use Value: 100dB CMRR rejects ignition noise on 12V supply; –40°C to 85°C rating meets automotive interior requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX44260ASA+T | Lower 1.2µA IQ, but only 10MHz GBW and no shutdown; 0.5mV VOS max. | Not suitable for 30MHz filter design or shutdown-controlled power gating. | Prefer LTC6261IS6#TRPBF when bandwidth, shutdown, or lower VOS are required. |
| OPA316IDBVR | Higher 400µA IQ, 10MHz GBW, no shutdown; 500µV VOS max; same SOT-23-6 package. | Lacks capacitive load drive capability (rated for 100pF only) and rail-to-rail input. | Choose LTC6261IS6#TRPBF for 1nF drive, true ground sensing, or sub-250µA power budgets. |
Compared with MAX44260ASA+T and OPA316IDBVR, the LTC6261IS6#TRPBF uniquely combines 30MHz bandwidth, 240µA supply current, 1nF load drive, and shutdown in a 6-pin TSOT-23 - making it optimal for high-fidelity, ultra-low-power sensor signal chains where dynamic range and power efficiency are co-constrained.
Availability
LTC6261IS6#TRPBF is available at Aetrix Electronics and suitable for micropower active filters, portable instrumentation, and battery-powered sensor nodes requiring stable component supply across industrial temperature ranges.
Supply support for LTC6261IS6#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC6261 family was designed specifically for ultra-low-power, high-precision signal conditioning in space- and energy-constrained applications - emphasizing rail-to-rail operation, capacitive load robustness, and sub-1mV offset at microampere quiescent currents.
FAQ
What is the maximum capacitive load the LTC6261IS6#TRPBF can drive while remaining stable?
The LTC6261IS6#TRPBF is unity-gain stable with capacitive loads up to 1nF, as confirmed in the datasheet's Typical Performance Characteristics (Figure 28). This eliminates the need for isolation resistors when driving SAR ADC input capacitance (typically 10–30pF) or long PCB traces, preserving signal integrity and bandwidth in precision data acquisition circuits using the LTC6261IS6#TRPBF.
Does the LTC6261IS6#TRPBF support true ground-sensing input operation?
Yes - the LTC6261IS6#TRPBF features rail-to-rail input with a common-mode range extending 100mV beyond both supply rails (–0.1V to VS + 0.1V). When powered from a single 3.3V supply with V– = 0V, it accepts input signals down to –0.1V, enabling accurate measurement of ground-referenced sensor outputs such as thermocouples or bridge transducers in systems using the LTC6261IS6#TRPBF.
What is the typical supply current of the LTC6261IS6#TRPBF at 1.8V operation?
At 1.8V supply and 25°C, the LTC6261IS6#TRPBF draws 240µA typical supply current (215–275µA over temperature), as specified in the 1.8V Electrical Characteristics table. This ultra-low quiescent current enables multi-year operation from primary lithium batteries in always-on sensor monitoring applications using the LTC6261IS6#TRPBF.
Can the LTC6261IS6#TRPBF be used as a drop-in replacement for legacy op amps like the MCP6001?
No - while both are single SOT-23-6 op amps, the LTC6261IS6#TRPBF has different pinout (SHDN on Pin 2 vs MCP6001's NC), higher GBW (30MHz vs 1MHz), and active shutdown functionality. Direct replacement requires PCB layout revision. The LTC6261IS6#TRPBF is intended for new designs demanding higher speed, lower power, and enhanced drive capability - not backward compatibility with MCP6001 footprints.
What is the output voltage swing specification for the LTC6261IS6#TRPBF at 3.3V supply?
At 3.3V supply and 25°C, the LTC6261IS6#TRPBF delivers rail-to-rail output swing: within 100mV of V– (35mV typ.) and within 130mV of V+ (60mV typ.) at no load, per the 5V Electrical Characteristics table (extrapolated to 3.3V). At 100µA load, swing degrades to 50mV above V– and 70mV below V+, ensuring >3.0Vpp dynamic range for 12-bit ADC drivers using the LTC6261IS6#TRPBF.
LTC6261IS6#TRPBF 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:
- Last Time Buy
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 7V/µs
- Gain Bandwidth Product:
- 30 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 nA
- Voltage - Input Offset:
- 400 µV
- Current - Supply:
- 245µA
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.25 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LTC6261IS6#TRPBF FAQ
1.How can I place an order for LTC6261IS6#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6261IS6#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 LTC6261IS6#TRPBF reliable?
The price and inventory of LTC6261IS6#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6261IS6#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC6261IS6#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6261IS6#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6261IS6#TRPBF?
LTC6261IS6#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6261IS6#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 LTC6261IS6#TRPBF?
For technical support, including LTC6261IS6#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6261IS6#TRPBF requirements.
6.How does Aetrix verify that LTC6261IS6#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6261IS6#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 LTC6261IS6#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC6261IS6#TRPBF?
All LTC6261IS6#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6261IS6#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 LTC6261IS6#TRPBF part is unused and in its original packaging.
Return procedure for LTC6261IS6#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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