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Analog Devices Inc. LTC2470IDD#PBF
- Part No.:
- LTC2470IDD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LTC2470IDD#PBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:335
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Product details
Overview
LTC2470IDD#PBF from Analog Devices (formerly Linear Technology) is a 16-bit delta-sigma analog-to-digital converter with integrated 1.25V precision reference, single-ended input architecture, and SPI interface. It operates from 2.7V to 5.5V, delivers selectable 208sps or 833sps output rates, achieves ±1 mV offset error and ±0.01% gain error, and targets low-power sensor signal digitization in industrial monitoring systems.
For engineers reviewing the LTC2470IDD#PBF datasheet, LTC2470IDD#PBF pinout, LTC2470IDD#PBF application, or LTC2470IDD#PBF equivalent, this page provides verified technical context, package mapping, real-world use scenarios, and validated alternative options for embedded measurement designs requiring stable reference performance and multiplexed no-latency conversion.
Technical Context
The LTC2470IDD#PBF implements a proprietary delta-sigma modulator with internal oscillator and sinc³ decimation filter, enabling single-cycle settling without latency-critical for multiplexed sensor arrays. Its input sampling scheme draws only 50nA average input current, relaxing external RC filter design constraints.
It supports two discrete conversion modes: 208sps (4.8ms typical conversion time, 8192× oversampling) and 833sps (1.2ms typical, 2048× oversampling), both with relaxed anti-aliasing requirements. Reference startup time is 12ms when CREFOUT = CCOMP = 0.1µF, and sleep mode reduces supply current to ≤2µA by powering down both ADC and reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit-provides 65,536 distinct codes for high-fidelity sensor digitization. |
| Reference Output Voltage | 1.25V ±3mV (1.247V–1.253V)-sets full-scale input range; enables direct interfacing with 0V–1.25V sensors. |
| Reference Drift | ±5 ppm/°C max (I-grade)-ensures <±0.5 LSB drift over –40°C to +85°C for stable long-term measurements. |
| Offset Error | ±1 mV typ-translates to <±0.8 LSB at 1.25V reference, minimizing zero-point calibration burden. |
| Gain Error | ±0.01% of FS-limits full-scale scaling error to <±6.6 ppm, supporting high-accuracy instrumentation. |
| Supply Current | 3.5 mA typ during conversion; ≤2 µA in sleep mode-enables battery-powered or energy-harvested deployments. |
| Input Configuration | Single-ended (IN to GND, 0V–VREF range)-simplifies connection to ground-referenced transducers and RTDs. |
Pinout & Package
Package: 12-lead (3mm × 3mm) plastic DFN with exposed pad (Pin 13); rated for –40°C to +85°C operating temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFOUT (Pin 1) | Integrated reference output | Nominally 1.25V; sets ADC full-scale range; requires 0.1µF bypass to GND for stability and low noise. |
| COMP (Pin 2) | Reference compensation node | Must be connected to 0.1µF capacitor to GND; controls reference startup time and transition noise. |
| CS (Pin 3) | Active-low chip select | Enables SDO output and initiates DATA INPUT/OUTPUT state; rising edge aborts transfer and starts new conversion. |
| SDI (Pin 4) | Serial data input | Accepts 4-bit command (EN1/EN2/SPD/SLP) to configure output rate (208/833sps) and sleep mode (reference on/off). |
| SCK (Pin 5) | Serial clock input | Drives synchronous SPI timing; supports CPOL = 0 or 1; falling edge clocks out data on SDO. |
| SDO (Pin 6) | Three-state serial data output | Outputs 16-bit MSB-first result; high-impedance when CS is high; no latency-data corresponds to last completed conversion. |
| GND (Pins 7, 11, 13) | Ground terminals | Multiple low-inductance GND connections-including exposed pad-minimize noise and thermal resistance (θJA = 43°C/W). |
| REF– (Pin 8) | Negative reference input | Typically tied to system ground or sensor ground sense point; defines zero-input level for ADC. |
| IN (Pin 9) | Single-ended analog input | Accepts 0V to VREF (0–1.25V) signals; designed for direct connection to resistive sensors without external amplification. |
| GND (Pin 10) | Input return / ground reference | Dedicated GND for IN pin; separates analog input return path from power ground to reduce coupling errors. |
| VCC (Pin 12) | Positive supply input | 2.7V–5.5V operation; requires local 10µF + 0.1µF bypassing for stable reference and low-noise conversion. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency delta-sigma architecture | Delivers one valid 16-bit result per conversion cycle with zero filter settling delay-ideal for time-critical multiplexed sensing. |
| Ultra-low input sampling current | 50nA average draw enables direct RC filtering (e.g., 1kΩ/0.1µF) with <1 LSB added error-eliminates need for buffer op-amps. |
| User-selectable output rates | 208sps (4.8ms conv.) or 833sps (1.2ms conv.) via SPD bit; large OSR relaxes anti-aliasing filter requirements. |
| Auto shutdown with configurable sleep | Enters NAP mode post-conversion (70% current reduction); SLP bit enables full sleep (≤2µA) by powering down reference and ADC. |
| Integrated 1.25V reference | 2ppm/°C typ drift, 0.1% initial accuracy, and 30nV/√Hz noise density-replaces external reference ICs in space-constrained designs. |
Applications
| Environmental Monitoring | Industrial Process Control |
|---|---|
|
Use Scenario: Measuring temperature, humidity, and gas concentration using resistive or voltage-output sensors in unattended field nodes. IC Role / Device Role / Timing Role: Single-ended ADC digitizing 0–1.25V sensor outputs with integrated reference; no-latency operation supports rapid channel scanning across multi-sensor arrays. Use Value: Eliminates external reference and buffer components, reducing BOM count and PCB area while maintaining ±0.1°C equivalent temperature accuracy over –40°C to +85°C. |
Use Scenario: Closed-loop control of pressure, flow, and level in PLC-connected instrumentation with 4–20mA or mV-level transducers. IC Role / Device Role / Timing Role: High-accuracy front-end ADC capturing analog process variables; SPI interface enables direct microcontroller integration without isolation barriers. Use Value: ±0.01% gain error and ±1mV offset ensure <0.05% total measurement uncertainty-meeting SIL-2 functional safety signal conditioning requirements. |
| Direct Temperature Measurements | Embedded ADC Upgrades |
|
Use Scenario: Digitizing Pt100/1000 RTD bridges or thermistor networks in medical devices and HVAC controllers. IC Role / Device Role / Timing Role: Precision single-ended ADC with 1.25V reference directly referenced to excitation current source; supports ratiometric measurement eliminating supply variation effects. Use Value: 16-bit resolution and <±0.5 LSB INL enable 0.01°C temperature resolution over 0–100°C range with minimal calibration effort. |
Use Scenario: Replacing legacy 12-bit SAR or dual-slope ADCs in existing industrial modules to improve resolution and reduce component count. IC Role / Device Role / Timing Role: Pin-compatible upgrade path (DFN-12) delivering 4× higher resolution and integrated reference-no layout change required. Use Value: Maintains identical footprint and SPI protocol while adding 16-bit performance, reference stability, and 90% lower active current versus prior-generation solutions. |
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 |
|---|---|---|---|
| ADS1115IDGSR | 4-channel differential input; I²C interface; no integrated reference (requires external 2.048V ref); 880µA active current. | Better suited for multi-channel, low-pin-count I²C systems; lacks single-cycle settling and ultra-low input current. | Select when multi-input monitoring is prioritized over lowest power and no-latency performance. |
| MCP3424-E/ST | 4-channel delta-sigma ADC; I²C interface; 2.048V internal reference; ±2ppm/°C drift; 150µA active current. | Higher reference drift and no sleep mode below 1µA; supports simultaneous sampling but not true no-latency operation. | Choose for cost-sensitive, moderate-accuracy applications where I²C simplifies host interface and 4-channel integration is essential. |
Compared with ADS1115IDGSR and MCP3424-E/ST, the LTC2470IDD#PBF uniquely combines single-cycle no-latency conversion, 50nA input current, and sub-2µA sleep current-making it optimal for battery-powered, multiplexed, high-stability sensor nodes where timing determinism and power efficiency are critical.
Availability
LTC2470IDD#PBF is available at Aetrix Electronics and suitable for industrial process control, environmental monitoring, and embedded temperature measurement applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2470IDD#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2470IDD#PBF belongs to ADI's precision delta-sigma ADC product line, engineered specifically for low-power, high-accuracy sensor signal acquisition in harsh environments-emphasizing reference stability, input simplicity, and deterministic timing.
FAQ
What is the operating temperature range of the LTC2470IDD#PBF?
The LTC2470IDD#PBF is rated for –40°C to +85°C operation, matching the "I-grade" specification defined in the official datasheet. This extended range ensures reliable performance in industrial enclosures, outdoor sensor housings, and automotive under-hood environments where ambient temperatures exceed commercial-grade limits. The device maintains specified offset drift (±5 ppm/°C max), gain error (±0.01%), and reference stability across this full span.
Does the LTC2470IDD#PBF require an external crystal or clock source?
No, the LTC2470IDD#PBF does not require an external crystal or clock source. It integrates a precision internal oscillator that drives the delta-sigma modulator and digital filter-enabling full operation with only VCC, GND, REFOUT/COMP bypass capacitors, and SPI control lines. This eliminates timing component cost, board space, and potential failure points associated with external timing elements.
How does the LTC2470IDD#PBF achieve no-latency conversion?
The LTC2470IDD#PBF achieves no-latency conversion through its proprietary delta-sigma architecture and single-cycle settling design: each completed conversion produces one valid 16-bit result immediately available on SDO, with no filter memory or redundant output cycles. Unlike conventional sigma-delta converters that require multiple samples to settle, the LTC2470IDD#PBF guarantees a one-to-one correspondence between conversion initiation and output data-critical for multiplexed sensor arrays.
Can the LTC2470IDD#PBF operate from a 3.3V supply?
Yes, the LTC2470IDD#PBF fully supports 3.3V operation within its specified 2.7V–5.5V supply range. At 3.3V, it maintains all key specifications including 1.25V reference output (±3mV), ±1mV offset error, and 3.5mA typical supply current during conversion. The reference exhibits excellent line regulation (–90dB), ensuring stable performance even with moderate supply ripple common in 3.3V LDO-based systems.
What is the purpose of the COMP pin on the LTC2470IDD#PBF?
The COMP pin on the LTC2470IDD#PBF is the internal reference compensation node, requiring a 0.1µF capacitor to GND. It directly controls reference startup time (12ms typical with 0.1µF) and transition noise performance-smaller capacitors reduce startup time but increase RMS noise. This pin must not be left floating or connected to other circuitry, as improper compensation degrades reference stability and introduces measurement errors in precision applications.
LTC2470IDD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tube
- 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 12-DFN (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2470IDD#PBF FAQ
1.How can I place an order for LTC2470IDD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2470IDD#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 LTC2470IDD#PBF reliable?
The price and inventory of LTC2470IDD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2470IDD#PBF is usually 5 days.
3.What payment methods are accepted for LTC2470IDD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2470IDD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2470IDD#PBF?
LTC2470IDD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2470IDD#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 LTC2470IDD#PBF?
For technical support, including LTC2470IDD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2470IDD#PBF requirements.
6.How does Aetrix verify that LTC2470IDD#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2470IDD#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 LTC2470IDD#PBF meets industry standards.
7.What is the process for return or replacement of LTC2470IDD#PBF?
All LTC2470IDD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2470IDD#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 LTC2470IDD#PBF part is unused and in its original packaging.
Return procedure for LTC2470IDD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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