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Analog Devices Inc. LTC6256CKC#TRPBF
- Part No.:
- LTC6256CKC#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
LTC6256CKC#TRPBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,938
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Product details
Overview
LTC6256CKC#TRPBF from Analog Devices (formerly Linear Technology) is a dual, rail-to-rail input/output, micropower operational amplifier in an 8-lead 2mm × 2mm UTDFN package. It delivers 6.5MHz gain-bandwidth product, 4.5MHz –3dB bandwidth at unity gain, and ultra-low 65µA supply current per amplifier while operating from 1.8V to 5.25V. It drives capacitive loads up to 100nF and is used in battery-powered instrumentation and automotive sensor signal conditioning.
For engineers reviewing the LTC6256CKC#TRPBF datasheet, LTC6256CKC#TRPBF pinout, LTC6256CKC#TRPBF application, or LTC6256CKC#TRPBF equivalent, key selection criteria include shutdown capability (7µA max), 350µV max offset voltage, C-Load™ capacitive drive stability, rail-to-rail I/O swing within 30mV of rails, and guaranteed operation from –40°C to 85°C.
Technical Context
The LTC6256CKC#TRPBF employs a dual-input PNP/NPN architecture that enables rail-to-rail input common-mode range (–0.1V to V+ + 0.1V) and seamless transition between input stages across the full supply range. Its patented C-Load™ compensation maintains unity-gain stability with capacitive loads up to 100nF without external compensation.
It integrates active low shutdown (SHDN pin), delivering 7µA max quiescent current when disabled, with fast 50µs turn-on and 20µs turn-off times. The output stage uses a common-emitter topology enabling rail-to-rail output swing (within 30mV of V+ or V–) and ±10mA continuous output drive capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 6.5MHz - Enables stable closed-loop operation up to ~1MHz at AV = 6, suitable for anti-aliasing and active filter stages. |
| Supply Current per Amp | 65µA - Allows two amplifiers to operate on <130µA total, ideal for multi-stage signal chains in energy-constrained systems. |
| Input Offset Voltage | 350µV max - Ensures ≤0.7mV error in 2V full-scale sensor interfaces without trimming. |
| Rail-to-Rail I/O | VOUT swings to within 30mV of V+ or V– - Supports full dynamic range utilization in 1.8V/3.3V systems without level-shifting. |
| Capacitive Load Drive | Stable with up to 100nF - Eliminates need for isolation resistors when driving ADC inputs or long PCB traces. |
| Shutdown Current | 7µA max - Reduces system standby power by >90% versus active mode, critical for wake-on-event architectures. |
| CMRR / PSRR | 100dB / 100dB - Rejects >99.99% of common-mode noise and supply ripple, preserving signal integrity in noisy environments. |
Pinout & Package
Package: 8-lead (2mm × 2mm × 0.6mm) plastic UTDFN with exposed pad connected to V–. Requires soldering exposed pad to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | +INA | Non-inverting input of Amplifier A; supports common-mode range from V– – 0.1V to V+ + 0.1V. |
| 2 | –INA | Inverting input of Amplifier A; same voltage range as +INA; requires matched layout for precision applications. |
| 3 | OUTA | Output of Amplifier A; rail-to-rail swing, capable of sourcing/sinking ≥10mA. |
| 4 | V– | Negative supply terminal; also connects to exposed pad; must be bypassed with 0.1µF capacitor near pin. |
| 5 | V+ | Positive supply terminal; operates from 1.8V to 5.25V; bypass with 0.1µF capacitor near pin. |
| 6 | –INB | Inverting input of Amplifier B; electrically identical to –INA; independent of Amplifier A. |
| 7 | +INB | Non-inverting input of Amplifier B; independent biasing and common-mode behavior from Amplifier A. |
| 8 | OUTB | Output of Amplifier B; fully independent output stage; no crosstalk specified below –100dB. |
Key Features
| Feature | Design Value |
|---|---|
| C-Load™ Capacitive Drive | Stable with 100nF load in unity-gain buffer configuration-no external compensation required for typical ADC driver layouts. |
| Active Low Shutdown | SHDN pin reduces total supply current to ≤7µA; output enters high-impedance state-enables multiplexed analog front-ends. |
| Rail-to-Rail Input Range | Accepts signals from V– – 0.1V to V+ + 0.1V-supports true ground-sensing and overvoltage-tolerant sensor interfaces. |
| Low 1/f Noise | 2.5µVP-P (0.1Hz–10Hz)-minimizes drift in DC-coupled sensor amplification and precision integrators. |
| High PSRR at Low VDD | 82dB min at 1.8V supply-maintains accuracy in battery-powered systems where supply regulation degrades with discharge. |
Applications
| Portable Instrumentation | Battery-Powered Sensor Nodes |
|---|---|
Use Scenario: Handheld multimeter front-end amplifying µV-level thermocouple or mV-level strain gauge outputs. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with low offset and drift, driving SAR ADC reference buffer. Use Value: 350µV max VOS and 1.5µV/°C drift ensure <0.1% measurement error across –10°C to 60°C ambient range. | Use Scenario: Wireless environmental sensor node (temperature/humidity) operating from coin cell for >5 years. IC Role / Device Role / Timing Role: Signal conditioner for analog sensor outputs, entering shutdown between readings. Use Value: 65µA active + 7µA shutdown current enables >100k sleep cycles per µAh, extending battery life beyond 5 years. |
| Automotive Cabin Sensors | Micropower Active Filters |
Use Scenario: Occupancy detection using capacitive proximity sensing in 12V automotive infotainment systems. IC Role / Device Role / Timing Role: Transimpedance amplifier converting pF-level capacitance change into measurable voltage. Use Value: 50nA max input bias current prevents signal loss across high-Z sensor electrodes; rail-to-rail output maximizes ADC utilization. | Use Scenario: 2nd-order Sallen-Key low-pass filter in portable ECG monitor rejecting 50/60Hz mains interference. IC Role / Device Role / Timing Role: Unity-gain buffer isolating filter poles and driving 100nF anti-aliasing capacitor directly. Use Value: C-Load™ stability eliminates need for series resistor, preserving filter Q-factor and phase response accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual micropower op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV9002IDR | Lower GBW (1MHz), higher IQ (60µA per amp), no shutdown, 36V max VS. | Not suitable for <2V operation or shutdown-controlled power gating. | Prefer LTC6256CKC#TRPBF when supply <2.5V, shutdown required, or >4MHz bandwidth needed. |
| OPA2313AIDR | Higher VOS (1.25mV max), no shutdown, 5.5V max VS, lower drive (±15mA). | Less accurate in DC-coupled precision gain stages; no power-gating capability. | Choose LTC6256CKC#TRPBF for sub-mV offset, rail-to-rail I/O at 1.8V, and integrated shutdown control. |
Compared with TLV9002IDR and OPA2313AIDR, the LTC6256CKC#TRPBF uniquely combines 6.5MHz GBW, 65µA quiescent current, active shutdown, and guaranteed 1.8V operation-making it optimal for high-fidelity, ultra-low-power dual-channel signal conditioning where precision and supply flexibility are critical.
Availability
LTC6256CKC#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered sensor nodes, and automotive cabin sensors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC6256CKC#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC6255/LTC6256/LTC6257 family was designed specifically for micropower, rail-to-rail, precision signal conditioning in space- and energy-constrained applications-emphasizing capacitive load stability, low-voltage operation, and minimal offset drift.
FAQ
What is the operating temperature range for the LTC6256CKC#TRPBF?
The LTC6256CKC#TRPBF is specified for operation from –40°C to +85°C (I-grade). This range is guaranteed by production testing and applies across all electrical parameters including offset voltage, gain-bandwidth, and shutdown current. The device uses the KC package variant, which is rated for this industrial temperature span and features an exposed V– pad for thermal reliability.
Does the LTC6256CKC#TRPBF require external compensation for driving ADC inputs?
No, the LTC6256CKC#TRPBF does not require external compensation when driving typical ADC inputs. Its C-Load™ architecture ensures unity-gain stability with capacitive loads up to 100nF-covering most SAR and delta-sigma ADC input capacitances (typically 5–30pF) plus PCB trace capacitance. This eliminates series isolation resistors that degrade SNR and THD+N performance in the LTC6256CKC#TRPBF-based ADC driver stage.
How does the shutdown function work on the LTC6256CKC#TRPBF?
The LTC6256CKC#TRPBF features an active-low SHDN pin (Pin 6 on KC package). When pulled ≤0.6V above V–, the amplifier enters shutdown, reducing supply current to ≤7µA per channel and placing both outputs in high-impedance state. The pin is internally pulled up, so leaving it unconnected keeps the device active. Turn-on time is 50µs and turn-off time is 20µs, making it suitable for burst-mode signal acquisition in the LTC6256CKC#TRPBF.
Can the LTC6256CKC#TRPBF operate from a 1.8V single supply?
Yes, the LTC6256CKC#TRPBF is fully specified and functional at 1.8V single supply (V+ = 1.8V, V– = 0V). At this voltage, it maintains 6MHz GBW (typ), 60µA supply current (typ), 350µV max VOS, and rail-to-rail output swing within 40mV of each rail. Its input common-mode range extends from –0.1V to 1.9V, enabling true ground-referenced sensing-critical for low-voltage sensor interfaces using the LTC6256CKC#TRPBF.
What is the maximum capacitive load the LTC6256CKC#TRPBF can drive stably in unity gain?
The LTC6256CKC#TRPBF is characterized for stable unity-gain operation with up to 100nF capacitive load, as verified in the "Capacitive Load Handling" plot (Figure G31) of its datasheet. This capability is enabled by internal C-Load™ compensation and eliminates the need for external isolation resistors in applications such as driving ADC sample-and-hold capacitors or long cables. Stability is maintained across –40°C to 85°C and 1.8V–5.25V supply range for the LTC6256CKC#TRPBF.
LTC6256CKC#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UTDFN (2x2)
LTC6256CKC#TRPBF FAQ
1.How can I place an order for LTC6256CKC#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6256CKC#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 LTC6256CKC#TRPBF reliable?
The price and inventory of LTC6256CKC#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6256CKC#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC6256CKC#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6256CKC#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6256CKC#TRPBF?
LTC6256CKC#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6256CKC#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 LTC6256CKC#TRPBF?
For technical support, including LTC6256CKC#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6256CKC#TRPBF requirements.
6.How does Aetrix verify that LTC6256CKC#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6256CKC#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 LTC6256CKC#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC6256CKC#TRPBF?
All LTC6256CKC#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6256CKC#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 LTC6256CKC#TRPBF part is unused and in its original packaging.
Return procedure for LTC6256CKC#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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