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Analog Devices Inc. LTC6084CDD#PBF
- Part No.:
- LTC6084CDD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC6084CDD#PBF.pdf
- Description:
- IC CMOS 2 CIRCUIT 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,565
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Product details
Overview
LTC6084CDD#PBF from Analog Devices (formerly Linear Technology) is a dual, rail-to-rail input/output CMOS operational amplifier optimized for low-power, precision signal conditioning in space-constrained applications. It delivers 1.5MHz gain bandwidth, 0.5V/μs slew rate, 750μV max offset voltage, 1pA typical input bias current at 25°C, and operates from 2.5V to 5.5V supply. It is used in portable medical sensors and battery-powered data acquisition front-ends where input leakage and dynamic range are critical.
For engineers reviewing the LTC6084CDD#PBF datasheet, LTC6084CDD#PBF pinout, LTC6084CDD#PBF application, or LTC6084CDD#PBF equivalent, key selection criteria include its 10-lead DFN (3mm × 3mm) package with exposed V– pad, shutdown capability per amplifier, rail-to-rail output swing within 5mV of rails, and guaranteed 0°C to 70°C operation - all verified in the official Linear Technology/LTC6084 datasheet Rev A.
Technical Context
The LTC6084CDD#PBF integrates two independent amplifiers sharing a common 2.5V–5.5V supply, each featuring complementary PMOS/NMOS input stages enabling true rail-to-rail common-mode input range (V– to V+). Its unity-gain stable architecture supports capacitive loads up to 300pF without external compensation.
Each amplifier includes dedicated active-low shutdown pins (SHDNA, SHDNB) that reduce supply current to ≤1.1μA per channel while placing the output in high-impedance state - enabling time-multiplexed signal routing or power-gated sensor interfaces without external switches.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 1.5MHz - supports stable closed-loop operation up to ~150kHz at gain = 10, suitable for anti-aliasing and sensor signal conditioning. |
| Input Bias Current | 1pA (typ @ 25°C) - enables use with >100GΩ source impedances (e.g., pH electrodes, piezoelectric sensors) without significant DC error. |
| Offset Voltage | 750μV max - ensures ≤0.75mV DC error at unity gain, critical for precision DC-coupled measurement paths. |
| Supply Current | 110μA per amplifier - allows dual-channel operation on <250μA total, ideal for coin-cell or energy-harvesting systems. |
| Rail-to-Rail Output | Swings within 5mV of V+ and V– under no-load - maximizes usable dynamic range in 3V or lower single-supply systems. |
| Shutdown Current | 1.1μA per amplifier - reduces quiescent draw by >99% during idle periods, extending battery life in duty-cycled applications. |
| CMRR | 70dB min - rejects common-mode noise from noisy digital supplies or shared ground returns in mixed-signal PCBs. |
Pinout & Package
Package: 10-lead (3mm × 3mm) plastic DFN with exposed thermal pad connected to V–. Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V+ | Positive supply rail connection; accepts 2.5V–5.5V; decoupling capacitor required near pin. |
| 2 | OUTB | Inverting amplifier B output; rail-to-rail capable; high-impedance when SHDNB = low. |
| 3 | –INB | Inverting input of amplifier B; part of CMOS differential pair with rail-to-rail common-mode range. |
| 4 | +INB | Noninverting input of amplifier B; same input stage as –INB; sensitive to board leakage above 100GΩ. |
| 5 | SHDNB | Active-low shutdown control for amplifier B; internal pull-up to V+; drives output high-Z when ≤0.5V. |
| 6 | SHDNA | Active-low shutdown control for amplifier A; identical behavior to SHDNB; enables independent channel gating. |
| 7 | +INA | Noninverting input of amplifier A; electrically identical to +INB; requires guard ring in high-Z layouts. |
| 8 | –INA | Inverting input of amplifier A; matches –INB; shares same input bias current spec and temperature drift. |
| 9 | OUTA | Inverting amplifier A output; rail-to-rail capable; high-impedance when SHDNA = low. |
| 10 | V– | Negative supply rail; internally connected to exposed pad; must be soldered to PCB thermal plane. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent shutdown controls | Enables per-amplifier power gating in multi-sensor systems without external FETs or logic. |
| Rail-to-rail input common-mode range | Accepts signals from V– to V+, eliminating level-shifting needs in single-supply 3V medical or IoT front-ends. |
| 1pA input bias current (25°C) | Preserves signal integrity in ultra-high-impedance transducer interfaces such as electrochemical sensors. |
| Exposed V– pad (Pin 11) | Reduces thermal resistance (θJA = 43°C/W) and improves PSRR stability in thermally sensitive analog sections. |
| Guaranteed 0°C to 70°C operation | Validated performance across commercial temperature range - simplifies qualification for consumer and industrial equipment. |
Applications
| Portable Medical Sensors | Low-Power Data Acquisition |
|---|---|
Use Scenario: Amplifying mV-level outputs from Murata shock sensors (e.g., PKGS-OOMX1) in wearable fall-detection devices. IC Role / Device Role / Timing Role: Signal-conditioning amplifier with 120mV/g sensitivity, 7Hz–5kHz bandwidth, and rail-to-rail output driving ADC reference. Use Value: 1.5MHz GBW and 0.5V/μs slew rate preserve transient fidelity; 1pA bias avoids loading high-Z piezo elements. | Use Scenario: Front-end buffering for 16-bit SAR ADCs in battery-powered environmental monitoring nodes. IC Role / Device Role / Timing Role: Dual-channel programmable-gain amplifier (PGA) stage with independent shutdown for channel multiplexing. Use Value: Shutdown current ≤1.1μA per channel extends 10-year battery life; 750μV max VOS maintains DC accuracy over temperature. |
| Consumer Electronics Audio | Industrial Sensor Signal Conditioning |
Use Scenario: Input stage for MEMS microphone preamplifiers in smart speakers with always-on voice detection. IC Role / Device Role / Timing Role: Low-noise, low-power op-amp providing 31nV/√Hz input noise density and rail-to-rail output swing into 10kΩ load. Use Value: 110μA supply current per amplifier enables dual-channel audio path without compromising battery runtime. | Use Scenario: Buffering pH probe outputs in handheld water quality testers requiring >100GΩ input impedance. IC Role / Device Role / Timing Role: High-input-impedance voltage follower with guard-ring-compatible layout and minimal board leakage sensitivity. Use Value: 1pA typical IB at 25°C and 40pA ≤85°C ensures <1mV error across operating range; DFN package saves PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual rail-to-rail op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC6084CMS8#PBF | Same electrical specs but in 8-lead MSOP package; no shutdown pins; θJA = 200°C/W. | Suitable for space-tolerant designs where per-channel shutdown is unnecessary and thermal budget allows higher junction temp. | Select when board layout permits larger footprint and shutdown functionality is not required. |
| LTC6082CDD#PBF | Lower 70μV max offset and 0.8μV/°C drift, but same 1.5MHz GBW and 1pA IB; also 10-lead DFN with shutdown. | Better DC precision for strain gauge or bridge sensor applications demanding sub-100μV error budgets. | Select when offset and drift dominate system error over bandwidth or power constraints. |
Compared with LTC6084CMS8#PBF, the LTC6084CDD#PBF adds independent shutdown control and superior thermal performance (θJA = 43°C/W vs 200°C/W), while LTC6082CDD#PBF trades higher cost for significantly improved DC accuracy - making the LTC6084CDD#PBF optimal for balanced low-power, low-leakage, and moderate-precision applications.
Availability
LTC6084CDD#PBF is available at Aetrix Electronics and suitable for portable medical sensors, low-power data acquisition, and consumer electronics requiring stable component supply across commercial temperature range (0°C to 70°C) with full traceability and long-term lifecycle support.
Supply support for LTC6084CDD#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 acquired Linear Technology in 2017 and maintains full product support, datasheet documentation, and application engineering resources for legacy Linear parts including the LTC6084 series.
The LTC6084 family was designed as a cost-optimized, dual-channel precision op-amp platform targeting battery-powered instrumentation, sensor interfaces, and portable test equipment where rail-to-rail operation, ultra-low input bias, and shutdown capability are essential.
FAQ
What is the maximum capacitive load the LTC6084CDD#PBF can drive in unity-gain configuration?
The LTC6084CDD#PBF can drive up to 300pF in unity-gain configuration without external compensation, as confirmed in the Typical Performance Characteristics section of the official datasheet. This capability is enabled by internal compensation and remains valid across the full 0°C to 70°C operating range. For loads exceeding 300pF, a small series resistor (e.g., 10–50Ω) between output and load restores stability.
Does the LTC6084CDD#PBF require external protection diodes on its inputs?
No, the LTC6084CDD#PBF includes integrated reverse-biased ESD protection diodes on all inputs and outputs, as documented in the Applications Information section. These diodes clamp transient voltages but require current limiting to ≤100mA to prevent damage. External diodes are unnecessary unless handling exceeds Absolute Maximum Ratings (e.g., >±10mA input current).
How does the exposed thermal pad on the LTC6084CDD#PBF connect electrically?
The exposed pad (Pin 11) on the LTC6084CDD#PBF is internally connected to V– and must be soldered directly to the PCB's V–/ground plane. This connection provides both thermal dissipation (reducing θJA to 43°C/W) and electrical stability. Leaving it unconnected or floating degrades PSRR, increases thermal resistance, and risks parametric shift.
Can the LTC6084CDD#PBF operate from a single 3.3V supply?
Yes, the LTC6084CDD#PBF is fully specified for 2.5V to 5.5V single-supply operation. At 3.3V, it maintains rail-to-rail input (0V to 3.3V common-mode range) and output swing within 5mV of both rails under no-load conditions, delivering full dynamic range for 12-bit+ ADC interfacing without level-shifting circuitry.
What is the turn-on time for the shutdown feature of the LTC6084CDD#PBF?
The turn-on time (tON) for the LTC6084CDD#PBF is 7μs, defined as the delay from SHDNx rising from 0.5V to 1.8V until the output reaches 90% of final value. This parameter is tested per amplifier and applies identically to both SHDNA and SHDNB pins, enabling fast wake-up in duty-cycled sensor systems.
LTC6084CDD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 1.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 110µA (x2 Channels)
- Current - Output / Channel:
- 12.5 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
LTC6084CDD#PBF FAQ
1.How can I place an order for LTC6084CDD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6084CDD#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 LTC6084CDD#PBF reliable?
The price and inventory of LTC6084CDD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6084CDD#PBF is usually 5 days.
3.What payment methods are accepted for LTC6084CDD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6084CDD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6084CDD#PBF?
LTC6084CDD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6084CDD#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 LTC6084CDD#PBF?
For technical support, including LTC6084CDD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6084CDD#PBF requirements.
6.How does Aetrix verify that LTC6084CDD#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6084CDD#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 LTC6084CDD#PBF meets industry standards.
7.What is the process for return or replacement of LTC6084CDD#PBF?
All LTC6084CDD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6084CDD#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 LTC6084CDD#PBF part is unused and in its original packaging.
Return procedure for LTC6084CDD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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