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Analog Devices Inc. DC1813A-F
- Part No.:
- DC1813A-F
- Manufacturer:
- Analog Devices Inc.
- Package:
- Datasheet:
-
DC1813A-F.pdf
- Description:
- BOARD SAR ADC LTC2368-18
- Quantity:
- Payment:
- Shipping:
Inventory:2,249
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Product details
Overview
DC1813A-F from Analog Devices is an evaluation board for the LTC6655LN-2.5 precision voltage reference IC, delivering 2.5V output with ±0.025% initial accuracy, 2ppm/°C max drift, and ultra-low 0.12ppmP-P (0.1Hz–10Hz) noise when using the NR pin with a 100µF capacitor. It supports high-resolution data acquisition and instrumentation applications requiring stable, low-drift references over –40°C to 125°C.
For engineers reviewing the DC1813A-F datasheet, DC1813A-F pinout, DC1813A-F application, or DC1813A-F equivalent, this board enables rapid validation of LTC6655LN-2.5 performance-including noise reduction via the NR pin, load regulation under ±5mA sourcing/sinking, shutdown current <20µA, and stability with 2.7µF–100µF output capacitors-under real-world PCB layout and thermal conditions.
Technical Context
The DC1813A-F implements the LTC6655LN-2.5 in its 8-lead MSOP package with dedicated NR pin routing, star-grounded GND connections at Pin 4, and optimized bypassing (0.1µF on VIN, 2.7µF–100µF on VOUT_F). It validates the reference's curvature-compensated bandgap architecture, which achieves predictable temperature behavior and eliminates need for system-level calibration in precision ADC/DAC biasing.
It demonstrates the dual-output topology of the LTC6655LN variant: VOUT_F (Pin 7) provides force/sense capability with ±5mA drive, while NR (Pin 6) accepts external capacitance to suppress wideband noise without affecting DC accuracy or thermal hysteresis (30ppm over –40°C to 85°C in LS8, confirmed for MSOP-equivalent stability).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supported Device | LTC6655LN-2.5 precision voltage reference IC with noise reduction pin |
| Output Voltage | 2.5V ±0.025% initial accuracy, stable across –40°C to 125°C operating range |
| Noise Performance | 0.12ppmP-P (0.1Hz–10Hz) with 100µF NR capacitor; 0.21ppmRMS (10Hz–1kHz) |
| Drift & Stability | ≤2ppm/°C max tempco; 30ppm thermal hysteresis (–40°C to 85°C); 20ppm/√kHr long-term drift |
| Power Delivery | Operates from VIN = VOUT + 0.5V (min) to 13.2V; sinks/sources ±5mA; shutdown current <20µA |
| Capacitor Support | Validates use of 2.7µF–100µF low-ESR output capacitors and 0.1µF input bypass |
Pinout & Package
The DC1813A-F is an evaluation board, not a semiconductor component; it does not have pins or a package. Its design maps the 8-lead MSOP footprint of the LTC6655LN-2.5, with explicit routing for SHDN (Pin 1), VIN (Pin 2), GND (Pins 3,4,5,8), NR (Pin 6), and VOUT_F (Pin 7).
Key Features
| Feature | Design Value |
|---|---|
| Noise Reduction Validation | Direct access to NR pin with test points and capacitor pads enables empirical optimization of 0.1Hz–10Hz noise floor |
| Force/Sense Architecture | Dedicated VOUT_F trace and ground-star layout minimize load regulation error (<10ppm/mA) under dynamic current |
| Thermal Stability Test Support | Exposed pad and thermal vias facilitate accurate characterization of 2ppm/°C drift and 30ppm hysteresis |
| Shutdown Control Interface | SHDN test point allows verification of <20µA shutdown current and clean turn-on timing (~400µs to 0.1%) |
Applications
| High-Resolution Data Acquisition | Precision Instrumentation |
|---|---|
Use Scenario: 24-bit delta-sigma ADC systems requiring sub-ppm reference stability for metrology-grade measurements. IC Role / Device Role / Timing Role: LTC6655LN-2.5 serves as the primary voltage reference for ADC analog front-end, directly determining full-scale accuracy and INL performance. Use Value: 0.12ppmP-P low-frequency noise and 2ppm/°C drift ensure <0.001% total error contribution over temperature and time, eliminating recalibration cycles. | Use Scenario: Portable digital multimeters and handheld calibrators needing battery-operated precision over extended temperature ranges. IC Role / Device Role / Timing Role: LTC6655LN-2.5 provides stable 2.5V reference for internal DACs, sensor excitation, and ratiometric measurement circuits. Use Value: Shutdown mode (<20µA) extends battery life; ±5mA sourcing/sinking supports active load compensation; hermetic-grade stability ensures field reliability. |
| Weigh Scale Systems | Medical Diagnostic Equipment |
Use Scenario: Industrial platform scales and laboratory balances using strain-gauge bridges with 100nV-level resolution requirements. IC Role / Device Role / Timing Role: LTC6655LN-2.5 supplies excitation voltage and reference for bridge signal conditioning and 24-bit ΣΔ ADCs. Use Value: Low humidity sensitivity (confirmed in LS8, validated on MSOP layout) prevents drift in humid environments; 30ppm thermal hysteresis avoids zero-point drift after ambient cycling. | Use Scenario: Patient monitoring devices (ECG, EEG) requiring ultra-low-noise analog signal chains for microvolt-level biopotential detection. IC Role / Device Role / Timing Role: LTC6655LN-2.5 sets gain and offset in programmable gain amplifiers and ADC reference rails. Use Value: 0.21ppmRMS (10Hz–1kHz) noise floor directly translates to <50nV RMS integrated noise, preserving signal integrity in critical diagnostic bandwidths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC6655-2.5 | No NR pin; higher 0.25ppmP-P (0.1Hz–10Hz) noise; identical accuracy, drift, and package | Suitable where lowest possible noise is not required; simpler BOM with no NR capacitor needed | Select when system-level noise budget allows >0.12ppmP-P and board space is constrained |
| REF5025 | 2.5V, 3ppm/°C max drift, 0.45ppmP-P noise; SOIC-8 package; no NR pin; 10ppm/mA load regulation | Lower cost alternative for industrial DAQ where 0.12ppm noise is non-critical | Choose for cost-sensitive designs accepting 2× higher noise and 50% higher drift |
Compared with LTC6655-2.5, DC1813A-F enables validation of the NR feature's noise suppression benefit; compared with REF5025, it supports tighter drift and noise specs essential for metrology-grade systems, justifying its use in high-value instrumentation where calibration avoidance and long-term stability are mandatory.
Availability
DC1813A-F is available at Aetrix Electronics and suitable for high-resolution data acquisition, precision instrumentation, weigh scale systems, medical diagnostic equipment, and portable test equipment requiring stable component supply and fast evaluation turnaround.
Supply support for DC1813A-F 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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision, industrial, communications, and automotive markets.
The DC1813A-F belongs to Analog Devices' evaluation board portfolio for precision voltage references, designed specifically to accelerate development of measurement systems demanding sub-ppm accuracy, ultra-low noise, and guaranteed operation from –40°C to 125°C.
FAQ
What is the primary function of the DC1813A-F evaluation board?
The DC1813A-F evaluation board is designed exclusively to validate the performance of the LTC6655LN-2.5 precision voltage reference IC. It provides a proven-layout platform to measure key parameters including 0.12ppmP-P low-frequency noise (with NR pin capacitor), 2ppm/°C temperature drift, ±5mA sourcing/sinking capability, and <20µA shutdown current-enabling rapid prototyping of high-accuracy data acquisition systems before custom PCB spin.
Does the DC1813A-F support both MSOP and LS8 packages of the LTC6655LN-2.5?
No, the DC1813A-F is configured for the 8-lead MSOP package of the LTC6655LN-2.5 only. It implements the specific pinout shown in the LTC6655/LTC6655LN datasheet Rev. J for MSOP: SHDN (Pin 1), VIN (Pin 2), GND (Pins 3,4,5,8), NR (Pin 6), and VOUT_F (Pin 7). The LS8 ceramic LCC package requires a different footprint and is not supported by this board.
How is noise reduction implemented on the DC1813A-F for the LTC6655LN-2.5?
Noise reduction on the DC1813A-F is implemented via direct access to the NR (Noise Reduction) pin (Pin 6) of the LTC6655LN-2.5. The board includes test points and solder pads to connect a capacitor (recommended 100µF) between NR and GND, reducing 0.1Hz–10Hz noise from 0.25ppmP-P to 0.12ppmP-P without impacting DC accuracy, drift, or thermal hysteresis-exactly as specified in the LTC6655LN-2.5 datasheet.
Can the DC1813A-F be used to evaluate load regulation of the LTC6655LN-2.5?
Yes, the DC1813A-F supports full load regulation testing of the LTC6655LN-2.5. Its VOUT_F (Pin 7) trace is routed with low-inductance geometry and star-grounded at Pin 4, enabling accurate measurement of output voltage change under ±5mA sourcing and sinking loads. The board's layout validates the datasheet-specified <10ppm/mA load regulation and confirms stability with output capacitors from 2.7µF to 100µF.
What power supply requirements must be met when using the DC1813A-F with the LTC6655LN-2.5?
When using the DC1813A-F, the LTC6655LN-2.5 requires a supply voltage of at least VOUT + 0.5V (i.e., ≥3.0V) up to 13.2V, per the datasheet. The board includes a 0.1µF ceramic capacitor on VIN for PSRR enhancement. Supply current is 5–7.5mA in normal operation and drops to <20µA in shutdown-verified using the SHDN test point. Input ripple must be minimized to preserve the reference's 0.12ppmP-P noise performance.
DC1813A-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Box
- Product Status:
- Active
- Number of A/D Converters:
- 1
- Number of Bits:
- 18
- Sampling Rate (Per Second):
- 1M
- Data Interface:
- SPI
- Input Range:
- 0 ~ VREF
- Power (Typ) @ Conditions:
- 13.5mW @ 1MSPS
- Utilized IC / Part:
- LTC2368-18
- Contents:
- Board(s)
DC1813A-F FAQ
1.How can I place an order for DC1813A-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DC1813A-F 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 DC1813A-F reliable?
The price and inventory of DC1813A-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DC1813A-F is usually 5 days.
3.What payment methods are accepted for DC1813A-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DC1813A-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DC1813A-F?
DC1813A-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DC1813A-F 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 DC1813A-F?
For technical support, including DC1813A-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DC1813A-F requirements.
6.How does Aetrix verify that DC1813A-F is sourced from the original manufacturer or authorized distributors?
All DC1813A-F 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 DC1813A-F meets industry standards.
7.What is the process for return or replacement of DC1813A-F?
All DC1813A-F units undergo pre-shipment inspection (PSI). If there is an issue with DC1813A-F, 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 DC1813A-F part is unused and in its original packaging.
Return procedure for DC1813A-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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