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Analog Devices Inc. LTC6255CDC#TRPBF
- Part No.:
- LTC6255CDC#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC6255CDC#TRPBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,566
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Product details
Overview
LTC6255CDC#TRPBF from Analog Devices (formerly Linear Technology) is a single, rail-to-rail input/output operational amplifier optimized for micropower precision signal conditioning in battery- or solar-powered systems. It delivers 6.5MHz gain-bandwidth product, 4.5MHz –3dB bandwidth at unity gain, 65µA quiescent current, 350µV max input offset voltage, and full rail-to-rail operation from 1.8V to 5.25V supplies.
For engineers reviewing the LTC6255CDC#TRPBF datasheet, LTC6255CDC#TRPBF pinout, LTC6255CDC#TRPBF application, or LTC6255CDC#TRPBF equivalent, key selection criteria include its C-Load™ capacitive-load drive capability (up to 100nF), shutdown function (7µA max), low 20nV/√Hz input voltage noise, and guaranteed performance over 0°C to 70°C in the 6-lead DFN package.
Technical Context
The LTC6255CDC#TRPBF employs a dual-input PNP/NPN architecture that enables true rail-to-rail input operation with ±100mV beyond supply rails and maintains low input bias current (≤50nA) across 0.2V–(VS–0.2V) common-mode range. Its patented C-Load™ compensation ensures unity-gain stability with capacitive loads up to 100nF without external compensation.
It integrates an active-low shutdown pin (VIL ≤ 0.6V, VIH ≥ 1.5V) enabling fast turn-on/off (tON = 50µs, tOFF = 20µs at 5V) and reduces supply current to ≤7µA. The output stage uses a common-emitter buffer capable of sourcing/sinking >10mA while swinging within 30mV of either rail under 1mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 6.5MHz - enables stable closed-loop operation up to ~4.5MHz at AV = +1 for sensor buffering and anti-aliasing filters. |
| Quiescent Current | 65µA - supports multi-year battery life in portable instrumentation and IoT edge nodes operating at 1.8–5.25V. |
| Input Offset Voltage | 350µV max - ensures <0.1% error in 3.3V full-scale 12-bit ADC front-ends without trimming. |
| Rail-to-Rail I/O | VIN = V––0.1V to V++0.1V; VOUT = V–+30mV to V+–24mV - eliminates level-shifting in single-supply 1.8V/3.3V systems. |
| Capacitive Load Drive | Stable with 100nF - directly interfaces with SAR ADC input capacitors (e.g., LTC2361) and long PCB traces without phase margin loss. |
| Shutdown Current | 7µA max - enables power cycling in duty-cycled sensor nodes while retaining fast wake-up (<50µs). |
| Input Voltage Noise | 20nV/√Hz @ 1kHz - preserves SNR in low-level transducer amplification (e.g., thermopiles, strain gauges). |
Pinout & Package
Package: 6-Lead (2mm × 2mm × 0.8mm) Plastic DFN with exposed pad connected to V–. Requires soldering exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT | Amplifier output | Delivers rail-to-rail voltage swing; high-Z state during shutdown; requires no pull-up/down for multiplexer use. |
| 2: –IN | Inverting input | Accepts signals from V––0.1V to V++0.1V; differential input voltage must be limited to <3.6V to avoid diode conduction. |
| 3: +IN | Non-inverting input | Same voltage range as –IN; bias current cancellation active only when VCM is 0.2V away from rails. |
| 4: V– | Negative supply / ground reference | Exposed pad (Pin 7) is internally tied to V–; must be soldered to PCB for thermal dissipation (θJA = 102°C/W). |
| 5: SHDN | Active-low shutdown control | Pulled to V– disables amplifier; left open defaults to enabled; logic thresholds defined at V–+0.6V (low) and V–+1.5V (high). |
| 6: V+ | Positive supply | Operates from 1.8V to 5.25V; bypass with 0.1µF ceramic capacitor placed adjacent to pin for PSRR optimization. |
Key Features
| Feature | Design Value |
|---|---|
| C-Load™ capacitive-load drive | Stable with 100nF in unity-gain configuration-eliminates need for isolation resistors when driving ADC inputs or long cables. |
| Rail-to-rail input and output | Full dynamic range utilization in 1.8V/3.3V systems-enables direct interfacing with low-voltage microcontrollers and ADCs without level shifters. |
| Low 65µA quiescent current | Enables continuous sensing in energy-harvesting applications-supports >5-year operation on a CR2032 coin cell in 1-second wakeup cycles. |
| Integrated shutdown control | Reduces current to ≤7µA with fast 50µs wake-up-ideal for time-sliced sensor arrays and battery-powered data loggers. |
| 20nV/√Hz input voltage noise | Preserves signal integrity in low-amplitude sensor paths-critical for thermocouple, pH probe, and medical biosensor front-ends. |
Applications
| Micropower Active Filter | Portable Instrumentation |
|---|---|
Use Scenario: 2nd-order Sallen-Key low-pass filter in handheld multimeter front-end, rejecting 50/60Hz interference while preserving DC accuracy. IC Role / Device Role / Timing Role: Precision op amp providing gain, filtering, and buffer isolation with minimal power draw. Use Value: 65µA current enables >100-hour battery life; rail-to-rail I/O avoids clipping on 3.3V supply; 350µV offset contributes <0.01% measurement error. | Use Scenario: Signal conditioning for a battery-powered gas detector using electrochemical sensors with µV-level output. IC Role / Device Role / Timing Role: Low-noise, low-drift amplifier amplifying sensor output prior to 16-bit SAR ADC sampling. Use Value: 20nV/√Hz noise density maintains >85dB SNR; 50nA input bias prevents error with MΩ-range sensor impedance. |
| Battery-Powered System | Automotive Electronics |
Use Scenario: Voltage monitoring circuit for Li-ion battery pack management, measuring cell voltages with 1mV resolution. IC Role / Device Role / Timing Role: Precision buffer isolating high-impedance voltage divider from ADC input capacitance. Use Value: C-Load™ drives 100nF ADC input without oscillation; 1.8V operation extends usable battery range down to 2.5V per cell. | Use Scenario: Cabin temperature sensor interface in automotive body control module, operating from 5V supply with wide ambient temperature range. IC Role / Device Role / Timing Role: Signal conditioner converting NTC thermistor resistance to linear voltage for microcontroller ADC. Use Value: Guaranteed 0°C to 70°C operation matches automotive interior spec; 100dB CMRR rejects ignition noise coupling on shared ground. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX44260ASA+T | Lower 30µA quiescent current but 10MHz GBW and higher 25nV/√Hz noise; no shutdown pin. | Preferred for ultra-low-power always-on monitoring where bandwidth >6MHz is needed and shutdown is unnecessary. | Select MAX44260ASA+T when minimizing average current dominates over noise and shutdown functionality. |
| OPA316IDBVR | Higher 100µA quiescent current, 10MHz GBW, 11nV/√Hz noise, rail-to-rail I/O, no shutdown, 5.5V max supply. | Better for noise-sensitive audio or precision analog front-ends where 1.8V operation is not required. | Choose OPA316IDBVR when lower noise and higher speed justify increased power consumption and lack of shutdown. |
Compared with MAX44260ASA+T and OPA316IDBVR, the LTC6255CDC#TRPBF uniquely balances 65µA supply current, 6.5MHz bandwidth, integrated shutdown, and guaranteed 1.8V operation-making it optimal for space-constrained, battery-powered industrial sensors requiring both precision and power cycling.
Availability
LTC6255CDC#TRPBF is available at Aetrix Electronics and suitable for micropower active filters, portable instrumentation, and battery-powered systems requiring stable component supply with lead-free, RoHS-compliant packaging.
Supply support for LTC6255CDC#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 acquired Linear Technology in 2017 and continues its legacy of high-performance analog ICs for precision, power, and signal processing applications.
The LTC6255 family belongs to Linear's micropower precision op amp product line, designed specifically for low-voltage, low-power signal conditioning in portable, energy-harvesting, and automotive sensor systems.
FAQ
What is the operating temperature range specified for the LTC6255CDC#TRPBF?
The LTC6255CDC#TRPBF is specified for commercial temperature range: 0°C to 70°C. This is indicated by the "C" suffix in the part number and confirmed in the Order Information table, where LTC6255CDC#TRPBF is listed with "0°C to 70°C" temperature range. It is packaged in a 6-lead DFN (2mm × 2mm × 0.8mm) with exposed pad.
Does the LTC6255CDC#TRPBF support rail-to-rail input and output operation?
Yes, the LTC6255CDC#TRPBF supports true rail-to-rail input and output. Its input common-mode range extends from V– – 0.1V to V+ + 0.1V, and its output swings to within 30mV of V– and 24mV of V+ under 1mA load. This capability is explicitly stated in the Pin Functions section and verified in Electrical Characteristics tables for VOL and VOH parameters.
What is the maximum capacitive load the LTC6255CDC#TRPBF can drive stably in unity-gain configuration?
The LTC6255CDC#TRPBF can drive up to 100nF capacitive load stably in unity-gain configuration, as demonstrated in the Typical Performance Characteristics "Capacitive Load Handling" plot (Figure G31) and confirmed in the Applications Information section. This C-Load™ capability eliminates external isolation resistors when interfacing with SAR ADCs like the LTC2361.
How does the shutdown feature of the LTC6255CDC#TRPBF operate?
The LTC6255CDC#TRPBF features an active-low SHDN pin (Pin 5). Pulling SHDN ≤ 0.6V relative to V– disables the amplifier, reducing supply current to ≤7µA. Releasing SHDN (or pulling ≥1.5V above V–) enables operation. Turn-on time is 50µs and turn-off time is 20µs at 5V supply, as specified in the 5V Electrical Characteristics table.
What are the key noise specifications of the LTC6255CDC#TRPBF?
The LTC6255CDC#TRPBF has an input voltage noise density of 20nV/√Hz at 1kHz and 2.5µVP-P integrated noise from 0.1Hz to 10Hz. Input current noise is 380fA/√Hz (PNP region) and 850fA/√Hz (NPN region) at 1kHz. These values are measured at 5V supply and are critical for low-level sensor signal amplification.
LTC6255CDC#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:
- 1.8V/µs
- Gain Bandwidth Product:
- 6.5 MHz
- -3db Bandwidth:
- 4.5 MHz
- Current - Input Bias:
- 5 nA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 65µA
- Current - Output / Channel:
- 35 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.25 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x2)
LTC6255CDC#TRPBF FAQ
1.How can I place an order for LTC6255CDC#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6255CDC#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 LTC6255CDC#TRPBF reliable?
The price and inventory of LTC6255CDC#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6255CDC#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC6255CDC#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6255CDC#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6255CDC#TRPBF?
LTC6255CDC#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6255CDC#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 LTC6255CDC#TRPBF?
For technical support, including LTC6255CDC#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6255CDC#TRPBF requirements.
6.How does Aetrix verify that LTC6255CDC#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6255CDC#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 LTC6255CDC#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC6255CDC#TRPBF?
All LTC6255CDC#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6255CDC#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 LTC6255CDC#TRPBF part is unused and in its original packaging.
Return procedure for LTC6255CDC#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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