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Analog Devices Inc. LTC6256IDC#PBF
- Part No.:
- LTC6256IDC#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC6256IDC#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,380
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Product details
Overview
LTC6256IDC#PBF from Analog Devices (formerly Linear Technology) is a dual, rail-to-rail input/output, micropower operational amplifier in an 8-lead 2mm × 2mm × 0.8mm plastic DFN package. It delivers 6.5MHz gain-bandwidth product, 4.5MHz –3dB bandwidth at unity gain, and consumes only 65µA per amplifier across 1.8V to 5.25V supply. It features C-Load™ capacitive-load drive capability, 350µV max input offset voltage, and operates from –40°C to +85°C - ideal for battery-powered instrumentation and automotive sensor signal conditioning.
For engineers reviewing the LTC6256IDC#PBF datasheet, LTC6256IDC#PBF pinout, LTC6256IDC#PBF application, or LTC6256IDC#PBF equivalent, key selection criteria include its shutdown functionality (7µA max), rail-to-rail I/O swing within 30mV of rails, low 20nV/√Hz input voltage noise at 1kHz, and guaranteed stability driving ≥100nF loads in unity-gain configuration.
Technical Context
The LTC6256IDC#PBF employs a composite PNP/NPN input stage that enables true rail-to-rail input operation with bias current cancellation, maintaining ≤50nA max input bias current over 0.2V to VSUPPLY–0.2V common-mode range. Its patented output buffer uses a common-emitter topology with internal compensation optimized for high capacitive-load drive without external compensation.
It supports active-low shutdown with 0.6V threshold referenced to V–, enabling fast turn-on (50µs) and turn-off (20µs) timing. The device achieves 100dB CMRR and PSRR across 1.8V–5.25V supplies, and maintains 1.8V/µs slew rate while delivering ±10mA output current into 10kΩ loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 6.5MHz - enables stable unity-gain operation with ≥100nF capacitive load and supports closed-loop bandwidth up to 4.5MHz. |
| Supply Current per Amplifier | 65µA max - allows continuous operation for >1 year on a single CR2032 coin cell in low-duty-cycle sensor front-ends. |
| Input Offset Voltage | 350µV max - ensures ≤0.7mV error in 2V full-scale 12-bit ADC driver applications without trimming. |
| Rail-to-Rail I/O Swing | Within 30mV of V+ and V– - supports direct interfacing to 1.8V logic and maximizes dynamic range in low-voltage systems. |
| Shutdown Current | 7µA max - reduces system standby power by >90% versus active mode, critical for always-on automotive modules. |
| Input Voltage Noise Density | 20nV/√Hz at 1kHz - preserves SNR in precision sensor amplification where signal amplitudes are sub-millivolt. |
| Operating Temperature Range | –40°C to +85°C - qualified for under-hood automotive electronics and industrial portable equipment. |
Pinout & Package
Package: 8-lead (2mm × 2mm × 0.8mm) plastic DFN with exposed V– pad (Pin 7) requiring PCB soldering for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUTA | Amplifier A output | Capable of sourcing/sinking ≥10mA; swings rail-to-rail; high-impedance during shutdown. |
| 2: –INA | Inverting input of Amp A | Accepts common-mode voltage from V– –0.1V to V+ +0.1V; protected by back-to-back diodes. |
| 3: +INA | Non-inverting input of Amp A | Same voltage range as –INA; bias current ≤50nA over mid-supply range. |
| 4: V– | Negative supply / ground reference | Exposed pad (Pin 7) is electrically connected to V–; must be soldered to PCB ground plane. |
| 5: V+ | Positive supply | Accepts 1.8V to 5.25V; requires 0.1µF ceramic bypass capacitor placed adjacent to pin. |
| 6: OUTB | Amplifier B output | Functionally identical to OUTA; independent output stage with same drive and swing specs. |
| 7: –INB | Inverting input of Amp B | Electrically isolated from Amp A inputs; shares same input structure and protection. |
| 8: +INB | Non-inverting input of Amp B | Independent of Amp A; supports differential or single-ended configurations per channel. |
Key Features
| Feature | Design Value |
|---|---|
| C-Load™ capacitive-load drive | Stable with ≥100nF load in unity-gain configuration - eliminates need for isolation resistors in ADC driver or filter applications. |
| Active-low shutdown control | Reduces supply current to ≤7µA per amplifier; output enters high-Z state - enables multiplexed sensor front-ends without signal contention. |
| Composite PNP/NPN input stage | Enables rail-to-rail input operation with <50nA bias current over 90% of supply range - preserves accuracy with high-impedance pH or thermistor sensors. |
| Low 1/f noise corner | 2.5µVP-P (0.1Hz–10Hz) - minimizes drift-induced errors in DC-coupled medical or weigh-scale amplifiers. |
| High PSRR/CMRR | 100dB PSRR and CMRR - rejects supply ripple and common-mode interference in noisy automotive or industrial environments. |
Applications
| Portable Instrumentation | Battery-Powered Sensor Nodes |
|---|---|
Use Scenario: Handheld multimeter front-end amplifying µV-level thermocouple or mV-level strain gauge signals. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with low offset and ultra-low power consumption. Use Value: Enables >12-hour runtime on two AA cells while maintaining 16-bit effective resolution via 350µV offset and 20nV/√Hz noise. | Use Scenario: Wireless environmental sensor node measuring temperature, humidity, and CO₂ with intermittent wake-up. IC Role / Device Role / Timing Role: Signal conditioner and ADC driver activated only during measurement bursts. Use Value: Shutdown current ≤7µA extends battery life to >5 years (CR2477) using duty-cycled operation with fast 50µs wake-up. |
| Automotive Cabin Sensors | Micropower Active Filters |
Use Scenario: Occupancy detection using capacitive proximity sensing in vehicle seats or dashboards. IC Role / Device Role / Timing Role: High-impedance buffer and integrator in charge-transfer signal chain. Use Value: Rail-to-rail I/O and 100dB CMRR reject ignition noise and enable reliable detection at <1pF capacitance change. | Use Scenario: 2nd-order Sallen-Key anti-aliasing filter preceding SAR ADC in data loggers. IC Role / Device Role / Timing Role: Unity-gain stable amplifier with integrated feedback network. Use Value: Drives 100nF film capacitor directly without isolation resistor, preserving filter Q-factor and phase linearity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333AIDR | Zero-drift architecture; 0.02µV/°C offset drift vs. LTC6256IDC#PBF's 1.5µV/°C; higher 17µA supply current. | Better long-term DC stability in precision weighing; less suitable for >100kHz signal paths due to chopper artifacts. | Select when offset drift dominates error budget over bandwidth or power. |
| TSV912IYDT | Lower 5.5MHz GBW; no shutdown; 160µA supply current; 1.1mV max offset. | Cost-optimized general-purpose dual op amp; lacks C-Load™ drive and rail-to-rail output swing. | Select for non-critical consumer applications where layout space and BOM cost outweigh performance needs. |
Compared with OPA2333AIDR and TSV912IYDT, the LTC6256IDC#PBF uniquely balances 6.5MHz bandwidth, 65µA quiescent current, and guaranteed 100nF capacitive-load drive - making it optimal for battery-powered signal chains requiring both speed and ultra-low power without sacrificing stability.
Availability
LTC6256IDC#PBF is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin sensors, and battery-powered sensor nodes requiring stable component supply with guaranteed –40°C to +85°C operation and RoHS-compliant packaging.
Supply support for LTC6256IDC#PBF 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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC6255/LTC6256/LTC6257 family was designed specifically for micropower, rail-to-rail signal conditioning in space- and energy-constrained systems - emphasizing capacitive-load robustness, wide supply range, and precision at sub-100µA currents.
FAQ
What is the maximum capacitive load the LTC6256IDC#PBF can drive stably in unity-gain configuration?
The LTC6256IDC#PBF is specified to drive ≥100nF capacitive loads stably in unity-gain configuration without external compensation, as verified in the Capacitive Load Handling plot (Figure G31) of the official datasheet. This C-Load™ capability eliminates series isolation resistors in ADC driver and active filter designs, preserving signal integrity and reducing component count.
Does the LTC6256IDC#PBF support true rail-to-rail input operation below the negative supply rail?
Yes, the LTC6256IDC#PBF accepts input voltages from V– –0.1V to V+ +0.1V, enabling true ground-sensing capability in single-supply systems. This allows direct connection to 0V-referenced sensors like thermistors or bridge transducers without level-shifting circuitry, maintaining accuracy across the full input range.
What is the typical turn-on time from shutdown for the LTC6256IDC#PBF?
The typical turn-on time for the LTC6256IDC#PBF is 50µs when the SHDN pin transitions from 0V to 5V, as measured under standard conditions (VSUPPLY = 5V, TA = 25°C). This fast wake-up enables efficient burst-mode operation in low-duty-cycle sensor interfaces while minimizing latency in responsive systems.
Can the LTC6256IDC#PBF operate from a 1.8V single supply?
Yes, the LTC6256IDC#PBF is fully specified for operation from 1.8V to 5.25V single or split supplies. At 1.8V, it maintains 6MHz gain-bandwidth product, 4MHz –3dB bandwidth, and 60µA typical supply current - making it suitable for modern ultra-low-voltage IoT endpoints and wearables.
Is the exposed pad on the LTC6256IDC#PBF's DFN package electrically connected, and how should it be handled?
Yes, the exposed pad (Pin 7) on the LTC6256IDC#PBF's 8-lead DFN package is electrically connected to V– and must be soldered to the PCB ground plane for proper thermal dissipation and electrical reference. Failure to connect it may cause thermal runaway under sustained load and degrade PSRR performance.
LTC6256IDC#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- 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 (x2 Channels)
- Current - Output / Channel:
- 35 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:
- 8-DFN (2x2)
LTC6256IDC#PBF FAQ
1.How can I place an order for LTC6256IDC#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6256IDC#PBF 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 LTC6256IDC#PBF reliable?
The price and inventory of LTC6256IDC#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6256IDC#PBF is usually 5 days.
3.What payment methods are accepted for LTC6256IDC#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6256IDC#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6256IDC#PBF?
LTC6256IDC#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6256IDC#PBF 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 LTC6256IDC#PBF?
For technical support, including LTC6256IDC#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6256IDC#PBF requirements.
6.How does Aetrix verify that LTC6256IDC#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6256IDC#PBF 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 LTC6256IDC#PBF meets industry standards.
7.What is the process for return or replacement of LTC6256IDC#PBF?
All LTC6256IDC#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6256IDC#PBF, 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 LTC6256IDC#PBF part is unused and in its original packaging.
Return procedure for LTC6256IDC#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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