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Analog Devices Inc. LT6660HCDC-10
- Part No.:
- LT6660HCDC-10
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 3-WFDFN Exposed Pad
- Datasheet:
-
LT6660HCDC-10.pdf
- Description:
- IC VREF SERIES 0.2% 3DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,836
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Product details
Overview
LT6660HCDC-10 from Analog Devices (formerly Linear Technology) is a precision micropower series voltage reference delivering 10V output with ±0.2% initial accuracy, 20ppm/°C max temperature coefficient, and guaranteed 20mA sourcing capability - designed for high-accuracy analog signal chains in handheld instruments and sensor modules.
For engineers reviewing the LT6660HCDC-10 datasheet, LT6660HCDC-10 pinout, LT6660HCDC-10 application, or LT6660HCDC-10 equivalent, key selection criteria include low supply current (270µA typ), no-output-capacitor operation, reverse-battery protection, and DFN package compatibility with space-constrained PCB layouts.
Technical Context
The LT6660HCDC-10 uses curvature-compensated bandgap architecture and laser-trimmed thin-film resistors to achieve stable 10V output across 0°C to 70°C. Its series topology eliminates idle current waste inherent in shunt references, enabling battery-operated systems to extend runtime.
It operates with input voltages as low as VOUT + 0.9V (10.9V min), supports up to 20mA load without external compensation, and features intrinsic reverse-battery protection - preventing conduction at –15V input. Thermal regulation is specified at 10ppm/mW, critical for precision applications under varying power dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10.000V ±0.2% (±20mV) at 25°C - enables 8-bit absolute accuracy over temperature without system calibration |
| Temp Coefficient | 20ppm/°C max (0°C to 70°C) - ensures ≤140ppm (0.0014%) drift across full range |
| Supply Current | 270µA typical at 25°C - supports >10-year battery life in µA-level standby systems |
| Load Current | 20mA guaranteed sourcing - sufficient to drive ADC references, op-amp bias networks, and DAC buffers |
| Line Regulation | 50ppm/V (typ) for VIN = 12.5V to 20V - minimizes output shift during supply rail variation |
| Dropout Voltage | 1.3V at 10mA load - allows operation from 11.3V input, reducing headroom requirements vs. older references |
| Output Noise | 4ppm P-P (0.1–10Hz), 4ppm RMS (10Hz–1kHz) - suitable for 16-bit+ data acquisition without added filtering |
Pinout & Package
3-lead 2mm × 2mm × 0.75mm plastic DFN package with exposed pad (GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input supply connection | Accepts 10.9V to 30V; reverse-battery protected to –15V; no series resistor required |
| GND | Ground reference and thermal path | Exposed pad must be soldered to PCB ground; serves as primary heat sink (θJA = 102°C/W) |
| OUT | Precision 10V output | Capacitor-free stable operation; drives up to 20mA; output impedance <1Ω below 10kHz |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables zero-footprint design and sub-10µs settling in fast-sampling systems |
| Reverse-battery protection | Blocks reverse current at –15V input - eliminates need for external blocking diode in portable equipment |
| Low IR reflow stress | 0.02% typical VOUT shift after reflow - reduces post-assembly calibration burden in production |
| Low long-term drift | 100ppm/√kHr - supports 10+ year field reliability in uncalibrated instrumentation |
| Wide input range | VIN = VOUT + 0.9V to 30V - accommodates 12V and 24V industrial rails while maintaining regulation |
Applications
| Handheld Precision Meters | Sensor Signal Conditioning |
|---|---|
Use Scenario: Battery-powered multimeter requiring stable 10V reference for 5½-digit ADC conversion across –10°C to 50°C ambient. IC Role / Device Role / Timing Role: Primary voltage reference for SAR ADC and front-end PGA gain-setting network. Use Value: 20ppm/°C drift and 0.2% accuracy eliminate factory recalibration; 270µA supply current extends alkaline battery life to >2 years. |
Use Scenario: Industrial pressure transducer module with 4–20mA output and onboard 24-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Excitation and reference source for bridge sensor and ADC, sharing common 10V rail. Use Value: Matched tempcos between excitation and reference minimize ratiometric error; 20mA drive handles both ADC REF and bridge bias simultaneously. |
| Portable Data Loggers | Medical Instrumentation |
Use Scenario: Low-power environmental logger recording temperature/humidity with 16-bit resolution over 5-year deployment. IC Role / Device Role / Timing Role: Reference for successive-approximation ADC and internal voltage monitor. Use Value: No-output-capacitor operation saves board area; 100ppm/√kHr long-term stability ensures <0.01% measurement drift over lifetime. |
Use Scenario: Portable ECG amplifier requiring ultra-low-noise, low-drift reference for analog front-end gain stages. IC Role / Device Role / Timing Role: Precision bias generator for instrumentation amplifiers and ADC reference input. Use Value: 4ppm P-P (0.1–10Hz) noise avoids contamination of sub-µV bio-signals; reverse-battery protection prevents damage during accidental polarity reversal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision series reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1460HCS8-10 | 0.075% initial accuracy, 10ppm/°C max, SO-8 package, 20mA output | Higher accuracy and lower drift, but larger SO-8 footprint and 1.2mA supply current | Select when ultimate stability outweighs size/power constraints |
| LT1790ACS6-10 | 0.05% accuracy, 10ppm/°C, SOT-23-6, 60µA supply current, 10mA output | Lower power and smaller package, but reduced output drive limits use in high-current buffer stages | Select for ultra-low-power sensor nodes where load <10mA |
Compared with LT6660HCDC-10, LT1460HCS8-10 offers tighter drift but triples supply current and doubles board area; LT1790ACS6-10 halves power consumption yet sacrifices 50% output current - making LT6660HCDC-10 the optimal balance of accuracy, drive strength, and micropower efficiency in compact DFN form.
Availability
LT6660HCDC-10 is available at Aetrix Electronics and suitable for handheld instruments, precision regulators, and sensor modules requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for LT6660HCDC-10 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) is a global leader in high-performance analog, mixed-signal, and digital signal processing ICs, serving industrial, automotive, communications, and healthcare markets.
The LT6660 family was designed specifically for micropower, high-accuracy series reference applications in space-constrained, battery-sensitive systems - emphasizing low drift, no-output-capacitor stability, and robust thermal performance in DFN packaging.
FAQ
What is the minimum input voltage required for stable operation of the LT6660HCDC-10?
The LT6660HCDC-10 requires a minimum input voltage of VOUT + 0.9V = 10.9V for stable regulation at room temperature. At 10mA load, dropout increases to 1.4V, requiring ≥11.4V input. Absolute maximum input is 30V, with reverse-battery protection active down to –15V.
Does the LT6660HCDC-10 require an output capacitor for stability?
No, the LT6660HCDC-10 is internally compensated and remains stable with zero output capacitance - a key advantage for fast-settling, space-constrained designs. Adding capacitance may improve PSRR but is not necessary for stability, unlike many competing references.
What is the long-term stability specification for the LT6660HCDC-10?
The LT6660HCDC-10 exhibits 100ppm/√kHr long-term stability, measured over >1000 hours on PC-board-mounted units at 30°C. This translates to ~316ppm drift after 10,000 hours (≈1.14 years), supporting multi-year calibration-free operation in field-deployed instrumentation.
How does the LT6660HCDC-10 handle reverse-voltage conditions?
The LT6660HCDC-10 incorporates integrated reverse-battery protection, limiting reverse leakage to ≤10µA at –15V input. This eliminates the need for external series diodes in portable equipment, preserving forward voltage headroom and avoiding power loss.
Can the LT6660HCDC-10 drive a 10µF capacitive load?
At 10mA load, the LT6660HCDC-10 supports up to 0.15µF output capacitance per datasheet Table 1. Driving 10µF would risk instability and ringing; for large capacitive loads, use an external buffer amplifier or select a reference explicitly rated for high-COUT operation.
LT6660HCDC-10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 3-WFDFN Exposed Pad
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 10V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 20ppm/°C
- Noise - 0.1Hz to 10Hz:
- 4ppmp-p
- Noise - 10Hz to 10kHz:
- 4ppmrms
- Voltage - Input:
- 10.9V ~ 20V
- Current - Supply:
- 350µA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 3-DFN (2x2)
LT6660HCDC-10 FAQ
1.How can I place an order for LT6660HCDC-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6660HCDC-10 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 LT6660HCDC-10 reliable?
The price and inventory of LT6660HCDC-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6660HCDC-10 is usually 5 days.
3.What payment methods are accepted for LT6660HCDC-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6660HCDC-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6660HCDC-10?
LT6660HCDC-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6660HCDC-10 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 LT6660HCDC-10?
For technical support, including LT6660HCDC-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6660HCDC-10 requirements.
6.How does Aetrix verify that LT6660HCDC-10 is sourced from the original manufacturer or authorized distributors?
All LT6660HCDC-10 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 LT6660HCDC-10 meets industry standards.
7.What is the process for return or replacement of LT6660HCDC-10?
All LT6660HCDC-10 units undergo pre-shipment inspection (PSI). If there is an issue with LT6660HCDC-10, 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 LT6660HCDC-10 part is unused and in its original packaging.
Return procedure for LT6660HCDC-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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