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Analog Devices Inc. LTC6261IDC#TRPBF
- Part No.:
- LTC6261IDC#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC6261IDC#TRPBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,565
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Product details
Overview
LTC6261IDC#TRPBF from Analog Devices is a single-channel, rail-to-rail input/output operational amplifier optimized for micropower, low-noise signal conditioning in battery- or solar-powered systems. It delivers 30MHz gain-bandwidth, 7V/µs slew rate, 240µA supply current, 400µV max offset voltage, and stable operation driving up to 1nF capacitive loads - enabling high-fidelity ADC driver and active filter applications at 1.8V–5.25V supply.
For engineers reviewing the LTC6261IDC#TRPBF datasheet, LTC6261IDC#TRPBF pinout, LTC6261IDC#TRPBF application, or LTC6261IDC#TRPBF equivalent, key selection criteria include its guaranteed –40°C to 85°C operating range, 6-lead 2mm × 2mm DFN package with exposed V– pad, shutdown capability (10µA max), and verified performance as an LTC2362 ADC driver with 72dB SNR and –83.6dB THD.
Technical Context
The LTC6261IDC#TRPBF uses a dual-input-stage architecture: PNP pair active below ~1V below V+, NPN pair active near V+, enabling true rail-to-rail input operation with <100nA bias current across 0.2V to V+–0.2V common-mode range. Its patented output buffer maintains unity-gain stability into 1nF while delivering >±10mA output current.
It integrates active bias current cancellation, internal ESD protection diodes on all pins, and a dedicated SHDN pin with 0.6V logic threshold referenced to V–. The exposed thermal pad (Pin 7) must be soldered to PCB for thermal management, supporting continuous operation at TJ ≤ 150°C with θJA = 80°C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 30MHz - enables stable closed-loop gain ≥10 at 3MHz, suitable for anti-aliasing filters and SAR ADC front-ends. |
| Supply Current per Amplifier | 240µA max - allows 10+ years of operation on a 200mAh coin cell in always-on sensor nodes. |
| Input Offset Voltage | ±400µV max - ensures ≤0.1% gain error in 12-bit precision instrumentation amplifiers. |
| Rail-to-Rail I/O | VIN = V––0.1V to V++0.1V; VOUT = V–+35mV to V+–60mV (no load) - supports ground-sensing and full-scale signal swing in single-supply 1.8V systems. |
| Capacitive Load Drive | Stable with up to 1nF - eliminates need for isolation resistors when driving ADC input capacitance or long PCB traces. |
| Shutdown Current | 10µA max - reduces system standby power by >95% versus active mode, critical for duty-cycled IoT sensors. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and automotive cabin electronics without derating. |
Pinout & Package
6-lead (2mm × 2mm × 0.8mm) plastic DFN package with exposed thermal pad (Pin 7) connected to V–. Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Rail-to-rail output capable of sourcing/sinking >±10mA; high-impedance during shutdown. |
| 2 (–IN) | Inverting input | Accepts V––0.1V to V++0.1V; differential input voltage limited to ±3.6V. |
| 3 (SHDN) | Active-low shutdown control | Pulled up internally; drives <10µA quiescent current when ≤0.6V above V–. |
| 4 (V+) | Positive supply | 1.8V–5.25V range; requires 0.1µF bypass capacitor close to pin. |
| 5 (+IN) | Non-inverting input | Same voltage range and protection as –IN; matched input capacitance (0.4pF diff / 0.3pF cm). |
| 6 (V–) | Negative supply | Typically GND; must be bypassed if floating; exposed pad (Pin 7) is electrically tied to this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-input-stage topology | Seamless transition between PNP and NPN input pairs enables rail-to-rail CMVR with <100nA bias current over 90% of supply range. |
| Proprietary output compensation | Maintains phase margin >45° into 1nF loads, eliminating external isolation resistors in ADC driver designs. |
| Input bias current cancellation | Reduces effective IB to <100nA over 0.2V–(V+–0.2V), enabling use with >1MΩ sensor sources without significant offset drift. |
| Low 1/f noise | 1.25µVP-P (0.1Hz–10Hz) - critical for DC-coupled precision measurement in portable instrumentation. |
| ESD-hardened inputs/outputs | Back-to-back diodes + ESD structures protect against ±2kV HBM - eliminates need for external TVS in space-constrained portable designs. |
Applications
| Micropower Active Filter | Portable Instrumentation |
|---|---|
Use Scenario: 2nd-order Sallen-Key low-pass filter in handheld multimeter front-end, operating from 3.3V coin cell. IC Role / Device Role / Timing Role: Precision gain-setting and buffering stage with 30MHz GBW ensuring flat response to 100kHz cutoff. Use Value: 240µA supply current extends battery life to >5 years; rail-to-rail I/O captures full sensor dynamic range without level-shifting. | Use Scenario: Signal conditioning for thermocouple amplifier in battery-powered field data logger. IC Role / Device Role / Timing Role: Low-noise, low-drift instrumentation amplifier input stage with 13nV/√Hz voltage noise. Use Value: ±400µV offset and 0.4µV/°C drift minimize cold-junction compensation errors; 1.25µVP-P 0.1–10Hz noise preserves µV-level thermocouple resolution. |
| Battery-Powered Sensor Node | Automotive Cabin Electronics |
Use Scenario: Analog front-end for MEMS accelerometer in wireless tire pressure monitor (TPMS), powered by 3V lithium battery. IC Role / Device Role / Timing Role: Low-power signal amplifier with shutdown control synchronized to RF wake-up events. Use Value: 10µA shutdown current reduces average system power to <1µA in sleep mode; 1.8V minimum supply enables direct battery connection without regulator. | Use Scenario: Ambient light sensor interface in automotive infotainment display, requiring operation from –40°C to +85°C. IC Role / Device Role / Timing Role: Rail-to-rail input amplifier accepting 0–5V photodiode current-to-voltage conversion output. Use Value: Guaranteed –40°C to +85°C performance avoids calibration drift; 100dB CMRR rejects ignition noise coupling onto sensor lines. |
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 GBW (10MHz), higher supply current (420µA), no shutdown pin | Not suitable for 30MHz filter or low-power shutdown modes | Select LTC6261IDC#TRPBF when 30MHz bandwidth and 10µA shutdown are required. |
| OPA316IDBVR | Higher offset (500µV max), no guaranteed 1nF drive, 1.8V min supply not specified | May require layout redesign for capacitive load stability | Select LTC6261IDC#TRPBF when driving 1nF ADC inputs or operating down to 1.8V with full spec compliance. |
Compared with MAX44260ASA+T and OPA316IDBVR, the LTC6261IDC#TRPBF uniquely combines 30MHz GBW, 240µA supply current, 1nF capacitive load drive, and integrated shutdown in a 2mm × 2mm DFN - making it optimal for space-constrained, battery-sensitive precision signal chains.
Availability
LTC6261IDC#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 grades.
Supply support for LTC6261IDC#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 energy-constrained applications - emphasizing rail-to-rail operation, 1nF capacitive load drive, and sub-1mV offset at microamp supply currents.
FAQ
What is the maximum capacitive load the LTC6261IDC#TRPBF can drive stably?
The LTC6261IDC#TRPBF is unity-gain stable driving up to 1nF capacitive loads without external compensation, as verified in the datasheet's Capacitive Load Handling plot (Figure 28). This capability eliminates series isolation resistors when interfacing with SAR ADC inputs or long PCB traces, preserving signal integrity and simplifying layout.
Does the LTC6261IDC#TRPBF support true ground-sensing input?
Yes. The LTC6261IDC#TRPBF accepts input voltages down to V– – 0.1V, enabling direct connection to 0V-referenced sensors in single-supply systems. Its rail-to-rail input stage maintains <100nA bias current within 0.2V of either rail, ensuring minimal error in ground-sensing configurations like thermocouple or bridge sensor interfaces.
What is the shutdown behavior of the LTC6261IDC#TRPBF output?
When the SHDN pin is pulled ≤0.6V above V–, the LTC6261IDC#TRPBF output enters high-impedance state with leakage current <±100nA. The amplifier draws ≤10µA total supply current, and output recovery time after shutdown release is 15µs (tON), enabling rapid wake-up in duty-cycled sensor systems.
Is the exposed pad on the LTC6261IDC#TRPBF package electrically connected?
Yes. Pin 7 (exposed thermal pad) is internally connected to V– and must be soldered to a PCB copper pour tied to the V– net. This connection is mandatory for thermal dissipation (θJA = 80°C/W) and electrical stability - floating the pad risks overheating and oscillation due to degraded grounding.
How does the LTC6261IDC#TRPBF achieve low input bias current across its full common-mode range?
The LTC6261IDC#TRPBF uses active bias current cancellation circuitry that mirrors and subtracts the base currents of both PNP and NPN input transistor pairs. This achieves <100nA max IB over 0.2V to V+–0.2V, but degrades near the rails where cancellation is inactive - a trade-off explicitly documented in the datasheet's Input Bias Current vs Common Mode Voltage plots.
LTC6261IDC#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-WFDFN Exposed Pad
- 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:
- 6-DFN (2x2)
LTC6261IDC#TRPBF FAQ
1.How can I place an order for LTC6261IDC#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6261IDC#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 LTC6261IDC#TRPBF reliable?
The price and inventory of LTC6261IDC#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6261IDC#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC6261IDC#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6261IDC#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6261IDC#TRPBF?
LTC6261IDC#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6261IDC#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 LTC6261IDC#TRPBF?
For technical support, including LTC6261IDC#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6261IDC#TRPBF requirements.
6.How does Aetrix verify that LTC6261IDC#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6261IDC#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 LTC6261IDC#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC6261IDC#TRPBF?
All LTC6261IDC#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6261IDC#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 LTC6261IDC#TRPBF part is unused and in its original packaging.
Return procedure for LTC6261IDC#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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