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Analog Devices Inc. LTC2470CDD#TRPBF
- Part No.:
- LTC2470CDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LTC2470CDD#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,146
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Product details
Overview
LTC2470CDD#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit delta-sigma ADC with integrated 1.25V precision reference, single-ended input (0V to VREF), and selectable 208sps/833sps output rate. It operates from 2.7V–5.5V, consumes 3.5mA typical during conversion and 200nA in sleep mode, and targets high-accuracy sensor digitization in space-constrained industrial monitoring systems.
For engineers reviewing the LTC2470CDD#TRPBF datasheet, LTC2470CDD#TRPBF pinout, LTC2470CDD#TRPBF application, or LTC2470CDD#TRPBF equivalent, key selection criteria include its 2ppm/°C reference drift, ±1mV offset error, 0.01% gain error, single-cycle settling for multiplexed inputs, and SPI interface compatibility with microcontrollers requiring low-latency, no-filtering analog acquisition.
Technical Context
The LTC2470CDD#TRPBF employs a proprietary delta-sigma architecture with internal oscillator and oversampling ratios of 8,192 (208sps) or 2,048 (833sps), enabling relaxed anti-aliasing filter requirements. Its input sampling scheme draws only 50nA average input current, minimizing external RC filter error.
It supports two power states: NAP (ADC off, reference on, ~1mA supply current) and SLEEP (ADC + reference off, ≤2µA), triggered via SPI command or SDI pin configuration. Reference startup time is 12ms with 0.1µF COMP/REFOUT capacitors, and conversion results are latency-free-each 16-bit output corresponds exactly to the prior completed conversion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 distinct digital codes over full-scale range |
| Reference Output Voltage | 1.25V ±3mV (1.247V–1.253V) - sets precise full-scale input range for single-ended operation |
| Reference Drift | ±2ppm/°C (C-grade) - ensures <±0.25mV total drift over 0°C–70°C operating range |
| Offset Error | ±1mV (max) - contributes ≤0.8 LSB error at 1.25V full scale, critical for zero-point accuracy |
| Gain Error | ±0.01% FS - limits full-scale scaling deviation to <6.5 LSB at 16-bit resolution |
| Conversion Rate | Selectable 208sps or 833sps - enables trade-off between noise performance (lower rate) and throughput (higher rate) |
| Sleep Current | ≤2µA - allows battery-powered operation for extended idle periods without compromising wake-up readiness |
Pinout & Package
Package: 12-lead (3mm × 3mm) plastic DFN with exposed pad (Pin 13), rated for 0°C to 70°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFOUT (1) | Reference output | Nominally 1.25V precision voltage source; must be decoupled with ≤0.1µF capacitor to GND for stability |
| COMP (2) | Reference compensation | Connects to 0.1µF capacitor to GND; sets reference loop stability and startup time |
| CS (3) | Chip select (active-low) | Enables SPI data transfer; rising edge aborts output and triggers new conversion |
| SDI (4) | Serial data input | Accepts 4-bit programming word (EN1/EN2/SPD/SLP) to configure output rate and sleep mode |
| SCK (5) | Serial clock input | Drives SPI timing; supports up to 2MHz; idle state configurable (CPOL = 0 or 1) |
| SDO (6) | Serial data output | 3-state output delivering 16-bit MSB-first result; valid after CS low, synchronized to SCK falling edges |
| GND (7, 11, 13) | Ground terminals | Three dedicated ground connections including exposed thermal pad; require low-impedance PCB plane tie |
| REF– (8) | Negative reference input | Defines zero-input point; typically tied to system ground or sensor ground sense node |
| IN (9) | Single-ended analog input | Input range: 0V to VREF; accepts DC or slowly varying signals without external buffering |
| GND (10) | Input ground reference | Internal connection to GND for single-ended topology; not user-accessible as signal return |
| VCC (12) | Positive supply | 2.7V–5.5V operation; requires local 10µF + 0.1µF parallel bypassing at pin |
Key Features
| Feature | Design Value |
|---|---|
| No-latency conversion output | Each 16-bit serial result corresponds exactly to the most recently completed conversion-no pipeline delay or redundant reads required in multiplexed systems |
| Ultra-low input sampling current | 50nA average draw enables direct interface with simple RC filters (e.g., 1kΩ + 0.1µF yields <1 LSB error), eliminating need for input buffers |
| User-selectable output rate | Hardware- or SPI-configurable 208sps (high resolution) or 833sps (higher throughput), with oversampling ratio automatically adjusted |
| Integrated reference with 2ppm/°C drift | Eliminates external reference IC and associated layout complexity while maintaining <±0.25mV total drift across commercial temperature range |
| Auto shutdown with dual power states | Automatic transition to NAP (ADC off) post-conversion; optional SLEEP (ADC + reference off) reduces current to ≤2µA for energy-sensitive applications |
Applications
| Environmental Sensor Node | Industrial Process Transmitter |
|---|---|
|
Use Scenario: Digitizing thermistor, RTD, or pressure bridge outputs in remote, battery-powered field nodes. IC Role / Device Role / Timing Role: Single-ended ADC with integrated reference provides calibrated 16-bit readings without external components or calibration routines. Use Value: 200nA sleep current extends battery life to years; 50nA input current allows direct RC filtering, reducing BOM and board area. |
Use Scenario: Converting 4–20mA loop sensor outputs or isolated voltage signals in PLC analog input modules. IC Role / Device Role / Timing Role: Precision front-end ADC with stable 1.25V reference ensures consistent scaling across temperature and supply variations. Use Value: ±2ppm/°C reference drift and ±0.01% gain error maintain <0.02% total unadjusted error over 0°C–70°C, meeting Class A transmitter specs. |
| Embedded System Health Monitor | Portable Instrumentation Front-End |
|
Use Scenario: Monitoring supply rail voltages, temperature, and fan tachometer signals inside network equipment or servers. IC Role / Device Role / Timing Role: Low-power, SPI-connected ADC acquiring multiple DC parameters with minimal MCU intervention. Use Value: Single-cycle settling eliminates software wait states; SPI interface allows daisy-chaining multiple LTC2470CDD#TRPBF units on one bus. |
Use Scenario: High-fidelity data acquisition in handheld multimeters or portable environmental analyzers. IC Role / Device Role / Timing Role: Standalone 16-bit converter replacing legacy 12-bit parts, delivering improved dynamic range without redesigning analog front-end. Use Value: Transition noise of 3µVRMS and 8LSB INL at 208sps enable sub-millivolt resolution on 1.25V full scale-critical for low-level sensor signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1115IRUGT | 4-channel, I²C interface, no integrated reference (requires external 2.048V ref), 880µA active current | Better suited for multi-channel, low-pin-count I²C systems; lacks auto-shutdown and ultra-low sleep current | Choose ADS1115IRUGT when channel count >1 and I²C infrastructure exists; avoid if reference integration or <2µA sleep is mandatory |
| MCP3424-E/ST | 4-channel, I²C, internal 2.048V reference (15ppm/°C), 150µA active current, no programmable rate | Higher reference drift limits accuracy over temperature; fixed 15sps/60sps/240sps rates reduce flexibility | Choose MCP3424-E/ST for cost-sensitive, lower-resolution (<16-bit effective) applications where I²C simplicity outweighs drift and rate constraints |
Compared with ADS1115IRUGT and MCP3424-E/ST, the LTC2470CDD#TRPBF uniquely combines integrated 2ppm/°C reference, SPI interface with programmable 208/833sps rates, and 200nA sleep current-making it optimal for single-channel, high-stability, ultra-low-power industrial sensing where layout area and calibration overhead must be minimized.
Availability
LTC2470CDD#TRPBF is available at Aetrix Electronics and suitable for industrial process transmitters, environmental sensor nodes, embedded system health monitors, and portable instrumentation requiring stable component supply with guaranteed long-term availability.
Supply support for LTC2470CDD#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 LTC2470CDD#TRPBF belongs to ADI's legacy Linear Technology precision ADC family, designed specifically for space-constrained, low-power applications demanding integrated reference accuracy, no-latency output, and simplified analog front-end design.
FAQ
What is the operating temperature range for the LTC2470CDD#TRPBF?
The LTC2470CDD#TRPBF is specified for 0°C to 70°C operation (C-grade). This commercial temperature range is validated per the Absolute Maximum Ratings table and applies to all electrical characteristics unless otherwise noted. The device uses a 12-lead DFN package with exposed pad optimized for thermal performance within this range.
Does the LTC2470CDD#TRPBF require an external crystal or clock source?
No, the LTC2470CDD#TRPBF includes a fully integrated oscillator and requires no external clock components. Its internal timing generator drives the delta-sigma modulator and digital filter, enabling full functionality with only VCC, GND, REFOUT/COMP decoupling, and SPI interface connections.
How does the LTC2470CDD#TRPBF achieve 200nA sleep current?
The LTC2470CDD#TRPBF reaches ≤200nA sleep current by powering down both the ADC core and the internal 1.25V reference simultaneously-enabled via the SLP bit in the SPI programming word or by tying SDI high. In this state, only leakage paths remain active, verified across temperature and supply conditions per the Power Requirements table.
Can the LTC2470CDD#TRPBF interface directly with a thermistor without an op amp buffer?
Yes-the LTC2470CDD#TRPBF's 50nA average input sampling current allows direct connection to high-impedance sensors like thermistors. For example, a 10kΩ thermistor + 0.1µF RC filter introduces <1 LSB error, eliminating the need for an op-amp buffer and simplifying signal chain design.
What is the maximum SCK frequency supported by the LTC2470CDD#TRPBF?
The LTC2470CDD#TRPBF supports an SCK frequency up to 2MHz across its full operating temperature range. This timing parameter is guaranteed per the Timing Characteristics table and enables fast data readout-completing the 16-bit transfer in ≤8µs at maximum clock rate.
LTC2470CDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 833
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 12-DFN (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2470CDD#TRPBF FAQ
1.How can I place an order for LTC2470CDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2470CDD#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 LTC2470CDD#TRPBF reliable?
The price and inventory of LTC2470CDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2470CDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2470CDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2470CDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2470CDD#TRPBF?
LTC2470CDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2470CDD#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 LTC2470CDD#TRPBF?
For technical support, including LTC2470CDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2470CDD#TRPBF requirements.
6.How does Aetrix verify that LTC2470CDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2470CDD#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 LTC2470CDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2470CDD#TRPBF?
All LTC2470CDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2470CDD#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 LTC2470CDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2470CDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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