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Analog Devices Inc. DC586A
- Part No.:
- DC586A
- Manufacturer:
- Analog Devices Inc.
- Package:
- Datasheet:
-
DC586A.pdf
- Description:
- BOARD DELTA SIGMA ADC LTC2431
- Quantity:
- Payment:
- Shipping:
Inventory:3,089
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Product details
Overview
DC586A from Analog Devices (formerly Linear Technology) is a 20-bit no-latency delta-sigma analog-to-digital converter with differential input and reference, 3ppm INL, 0.56ppm RMS noise, and integrated oscillator enabling 110dB 50Hz/60Hz notch rejection - used in precision weight scales, strain gauge transducers, and industrial process control systems.
For engineers reviewing the DC586A datasheet, DC586A pinout, DC586A application, or DC586A equivalent, this page delivers verified specifications, validated pin functions, confirmed use cases in direct sensor digitization, and two technically documented alternative parts for design flexibility and supply continuity.
Technical Context
The DC586A implements a decimating FIR digital filter synchronized to an internal oscillator (153.6kHz or 128kHz), achieving single-cycle settling without latency - each conversion output corresponds directly to the sampled input step. Its autocalibration engine performs offset and full-scale correction every cycle, ensuring stability over temperature, supply voltage, and time.
It supports flexible clocking: FO pin selects 50Hz (FO = VCC) or 60Hz (FO = GND) rejection via internal oscillator, or accepts external fEOSC (5–2000kHz) for user-defined notch frequencies at fEOSC/2560. The 3-wire SPI/MICROWIRE interface operates in internal or external SCK mode, determined at power-up by SCK pin state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 20-bit, no missing codes - guarantees monotonicity and unambiguous code mapping across full range. |
| INL | 3ppm of VREF - enables ±0.0003% linearity error in high-precision ratiometric measurements. |
| RMS Noise | 0.56ppm (2.8µV RMS at VREF = 5V) - supports 20.8 ENOB for stable low-noise DC sensing. |
| Supply Range | 2.7V to 5.5V - compatible with single-supply industrial and battery-powered systems. |
| Common Mode Rejection | 120dB DC, 140dB at 50/60Hz - rejects ground shifts and power-line interference in noisy environments. |
| Conversion Current | 200µA (conversion mode), 4µA (autosleep) - enables ultra-low-power operation in intermittent-read applications. |
| Differential Reference Range | 0.1V to VCC - allows flexible ratiometric configurations with remote sensing or low-voltage references. |
Pinout & Package
DC586A is packaged in a 16-lead plastic SSOP (Small Outline Package) with seven dedicated ground pins for optimal noise immunity and thermal dissipation. Pin layout follows LTC2431IMS pinout per Linear Technology documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 7, 8, 9, 10, 15, 16) | Ground reference | Multiple low-impedance ground paths minimize return current noise and improve PSRR. |
| VCC (Pin 2) | Positive supply | Requires 10µF tantalum + 0.1µF ceramic bypass close to pin for stable ADC operation. |
| REF+ / REF– (Pins 3, 4) | Differential reference inputs | Accept 0.1V–VCC differential voltage; common-mode range spans GND to VCC for flexible biasing. |
| IN+ / IN– (Pins 5, 6) | Differential analog inputs | Support –0.5VREF to +0.5VREF input range; absolute voltage range extends beyond rails (GND–0.3V to VCC+0.3V). |
| CS (Pin 11) | Active-low chip select | Wakes device from autosleep; aborts data transfer if raised mid-read; initiates new conversion. |
| SDO (Pin 12) | Three-state serial data output | Outputs 24-bit conversion result; serves as conversion status indicator when CS is low and no SCK active. |
| SCK (Pin 13) | Bidirectional serial clock | Functions as output (internal clock mode) or input (external clock mode); mode set at power-up or CS falling edge. |
| FO (Pin 14) | Frequency control input | Selects 50Hz (FO = VCC), 60Hz (FO = GND), or external fEOSC for programmable notch filtering. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency conversion | Single-cycle digital filter settling ensures each output corresponds exactly to its input sample - critical for multiplexed sensor arrays. |
| Per-cycle auto-calibration | Continuous offset and full-scale correction eliminates drift-related errors without interrupting conversion flow. |
| Configurable 50/60Hz rejection | Hardware-selectable notch via FO pin - no software configuration or external components required. |
| Wide common-mode input range | IN+/IN– accept GND–0.3V to VCC+0.3V - supports direct connection to bridge sensors without level-shifting circuitry. |
| Flexible reference architecture | Differential reference with 0.1V–VCC range enables true ratiometric measurement and remote sensing topologies. |
Applications
| Weight Scales | Strain Gauge Transducers |
|---|---|
Use Scenario: High-resolution load cell readout in commercial and industrial weighing systems requiring NTEP or OIML certification. IC Role / Device Role / Timing Role: Direct digitizer of mV-level bridge outputs with integrated 50/60Hz line rejection and ratiometric scaling. Use Value: 3ppm INL and 0.56ppm noise enable <10mg resolution on 30kg platforms using standard 350Ω load cells. |
Use Scenario: Precision force and pressure measurement in test benches and structural monitoring systems. IC Role / Device Role / Timing Role: Low-drift ADC interfacing with quarter/half/full Wheatstone bridges under varying ambient temperatures. Use Value: Per-cycle calibration maintains <±2ppm offset drift over –40°C to +85°C, eliminating recalibration cycles. |
| Industrial Process Control | Gas Analyzers |
Use Scenario: Analog input module for PLCs and DCS systems measuring 4–20mA loop signals via precision shunt resistors. IC Role / Device Role / Timing Role: High-common-mode-rejection ADC converting shunt voltage with simultaneous 50/60Hz noise suppression. Use Value: 120dB DC CMRR and 140dB 60Hz rejection ensure accurate current measurement in electrically noisy factory environments. |
Use Scenario: Electrochemical sensor signal conditioning in portable and fixed gas detection equipment. IC Role / Device Role / Timing Role: Low-power, low-noise ADC capturing slow-varying sensor currents with high DC stability. Use Value: 4µA autosleep current and 20.8 ENOB support >10-year battery life in handheld CO/H2S analyzers while maintaining sub-ppm baseline accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 20-bit delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2410CMS | 24-bit resolution, same pinout, higher power (350µA conversion), 0.15ppm noise - requires tighter layout and more aggressive decoupling. | Better suited for metrology-grade DVMs where 24-bit resolution outweighs power budget constraints. | Select LTC2410CMS only when 24-bit resolution is mandatory and system can accommodate higher supply current and noise floor requirements. |
| ADS124S08IPW | 24-bit, integrated PGA (1–128x), internal reference, SPI interface - different pinout, no FO pin, fixed 50/60Hz rejection via register setting. | Ideal for multi-channel sensor nodes with variable gain needs, but lacks hardware-selectable notch and true differential reference flexibility. | Choose ADS124S08IPW for designs requiring programmable gain and internal reference; avoid if FO-driven hardware notch selection or external differential reference is required. |
Compared with LTC2410CMS and ADS124S08IPW, DC586A uniquely balances 20-bit precision, ultra-low autosleep current (4µA), hardware-configurable 50/60Hz rejection, and full differential reference support - making it optimal for battery-powered, noise-immune, ratiometric sensor interfaces where pin compatibility and minimal firmware overhead are critical.
Availability
DC586A is available at Aetrix Electronics and suitable for precision weight scales, strain gauge transducers, and industrial process control systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for DC586A 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, datasheets, and application engineering for legacy Linear parts including the DC586A.
The DC586A belongs to Linear's precision delta-sigma ADC family designed for direct sensor digitization in industrial, instrumentation, and test equipment - emphasizing no-latency operation, on-chip calibration, and robust line-frequency rejection.
FAQ
What is the maximum external oscillator frequency supported by DC586A?
The DC586A accepts external oscillator frequencies from 5kHz to 2000kHz on the FO pin. At 2000kHz, the digital filter's first null occurs at 781.25Hz (2000kHz ÷ 2560), enabling custom notch placement beyond 50/60Hz. Operation remains specified across this full range per the Electrical Characteristics table in the DC586A datasheet.
Does DC586A require external components for its internal oscillator?
No, DC586A requires no external components for its internal oscillator. The oscillator is fully integrated and self-contained; connecting FO to VCC or GND configures 50Hz or 60Hz rejection respectively without crystals, capacitors, or resistors - simplifying BOM and layout for cost-sensitive precision systems.
Can DC586A operate with a 2.7V supply and still achieve 3ppm INL?
Yes, DC586A maintains 3ppm INL over its full 2.7V to 5.5V supply range when VCC ≥ 4.5V and VREF = 5V, or when VCC ≥ 5V and VREF = 5V. At 2.7V supply, INL degrades to 20ppm (per Electrical Characteristics table), so 3ppm performance requires VCC ≥ 4.5V with appropriate reference conditions.
How does DC586A handle input overrange conditions?
DC586A generates unique overrange and underrange output codes when the differential input exceeds ±0.5•VREF. These codes are distinct from valid conversion results and remain stable - enabling reliable fault detection in bridge sensor applications without external comparators or additional logic.
Is DC586A pin-compatible with any higher-resolution alternatives?
Yes, DC586A (LTC2431IMS) is pin-compatible with the 24-bit LTC2410CMS and LTC2411IMS in the same 16-lead SSOP package. This allows drop-in resolution upgrades in existing layouts, though higher resolution increases supply current (350µA vs. 200µA) and demands stricter noise control on VCC and reference lines.
DC586A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Box
- Product Status:
- Active
- Number of A/D Converters:
- 2
- Number of Bits:
- 20
- Sampling Rate (Per Second):
- 7.5
- Data Interface:
- MICROWIRE™, Serial, SPI™
- Input Range:
- -
- Power (Typ) @ Conditions:
- -
- Utilized IC / Part:
- LTC2431
- Contents:
- Board(s)
DC586A FAQ
1.How can I place an order for DC586A through Aetrix?
Please submit a Request for Quotation (RFQ) for DC586A 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 DC586A reliable?
The price and inventory of DC586A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DC586A is usually 5 days.
3.What payment methods are accepted for DC586A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DC586A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DC586A?
DC586A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DC586A 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 DC586A?
For technical support, including DC586A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DC586A requirements.
6.How does Aetrix verify that DC586A is sourced from the original manufacturer or authorized distributors?
All DC586A 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 DC586A meets industry standards.
7.What is the process for return or replacement of DC586A?
All DC586A units undergo pre-shipment inspection (PSI). If there is an issue with DC586A, 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 DC586A part is unused and in its original packaging.
Return procedure for DC586A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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