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Analog Devices Inc. LTC2470CMS#PBF
- Part No.:
- LTC2470CMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-TSSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2470CMS#PBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,091
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Product details
Overview
LTC2470CMS#PBF from Analog Devices (formerly Linear Technology) is a 16-bit single-ended delta-sigma ADC with integrated 1.25V precision reference, SPI interface, and selectable 208sps/833sps output rate. It operates from 2.7V to 5.5V, draws 3.5mA typical supply current during conversion, and achieves ±1mV offset error and ±0.01% gain error - enabling high-accuracy sensor digitization in space-constrained industrial monitoring systems.
For engineers reviewing the LTC2470CMS#PBF datasheet, LTC2470CMS#PBF pinout, LTC2470CMS#PBF application, or LTC2470CMS#PBF equivalent, key selection criteria include its single-ended input architecture, MSOP-12 package, 2µA max sleep current, internal oscillator, and no-latency data output for multiplexed sensor acquisition.
Technical Context
The LTC2470CMS#PBF implements a proprietary delta-sigma modulator with decimating sinc filter and oversampling ratios of 8,192 (208sps) or 2,048 (833sps), relaxing anti-aliasing filter requirements. Its internal 1.25V reference exhibits ±2ppm/°C drift over 0°C to 70°C and 0.1% initial accuracy, directly setting the full-scale input range (0V to VREF).
Operation follows a deterministic three-state cycle: CONVERT (3.2–4.8ms at 208sps), SLEEP/NAP (ADC auto-shutdown), and DATA INPUT/OUTPUT (SPI read with MSB-first 16-bit serial stream). Input sampling current is 50nA, enabling direct RC filtering without significant error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 distinct digital codes for high-fidelity analog measurement |
| Reference Voltage | 1.25V ±3mV - sets precise 0V–1.25V input range; stable across temperature and supply |
| Offset Error | ±1mV - ensures accurate zero-scale response without calibration in most applications |
| Gain Error | ±0.01% FS - maintains linearity across full input span, critical for calibrated sensors |
| Supply Current | 3.5mA typ (conversion), 2µA max (sleep) - enables battery-powered or low-power system operation |
| Output Rate | Selectable 208sps or 833sps - balances resolution, speed, and noise performance per application need |
| Input Type | Single-ended (IN to GND) - simplifies signal conditioning for unipolar sensors and transducers |
Pinout & Package
Package: 12-lead plastic MSOP (3mm × 4.9mm), exposed pad optional, rated for 0°C to 70°C operating temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFOUT (Pin 1) | Reference output | Nominally 1.25V precision voltage source; must be bypassed with ≤0.1µF capacitor to GND for stability |
| COMP (Pin 2) | Reference compensation | Requires 0.1µF capacitor to GND; controls reference startup time and transition noise |
| CS (Pin 3) | Chip select (active low) | Enables SPI communication; rising edge aborts data transfer and initiates new conversion |
| SDI (Pin 4) | Serial data input | Accepts 4-bit command (EN1/EN2/SPD/SLP) to configure output rate and sleep mode |
| SCK (Pin 5) | Serial clock input | Drives SPI timing; supports CPOL = 0 or 1; falling edge clocks out data on SDO |
| SDO (Pin 6) | Serial data output | Three-state MSB-first 16-bit result; high-impedance when CS is high |
| GND (Pins 7, 11) | Ground | Primary analog/digital return; multiple pins reduce ground impedance and improve noise immunity |
| REF– (Pin 8) | Reference negative input | Connected to system ground or sensor ground sense point; defines zero-input level |
| IN (Pin 9) | Analog input (single-ended) | Accepts 0V to VREF (0–1.25V); designed for low-leakage, high-impedance sources |
| GND (Pin 10) | Input ground reference | Dedicated ground return for IN pin; improves PSRR and common-mode rejection |
| VCC (Pin 12) | Positive supply | 2.7V–5.5V operation; requires 10µF + 0.1µF parallel bypassing at device pin |
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 multiplexed sensor arrays |
| Integrated 1.25V reference | 2ppm/°C max drift and 0.1% initial accuracy eliminate need for external reference and reduce BOM count |
| Ultra-low input sampling current | 50nA average draw enables direct use of simple RC filters (e.g., 1kΩ/0.1µF) with <1LSB error |
| Configurable power management | Software-selectable sleep mode reduces current to 2µA max; reference powers down independently for further savings |
| Internal oscillator | Removes requirement for external clock source or crystal - simplifies layout and lowers system cost |
Applications
| Environmental Sensor Node | Industrial Process Monitor |
|---|---|
Use Scenario: Measuring temperature, humidity, and gas concentration in remote field deployments with limited power budget. IC Role / Device Role / Timing Role: Single-ended ADC digitizing conditioned outputs from analog-output sensors (e.g., thermistors, RTDs, analog gas sensors). Use Value: 2µA sleep current extends battery life; integrated reference ensures long-term measurement stability without recalibration. |
Use Scenario: Monitoring pressure, flow, and level signals in PLC I/O modules and distributed control systems. IC Role / Device Role / Timing Role: High-accuracy front-end converter for 4–20mA loop receivers and isolated analog inputs. Use Value: ±1mV offset and ±0.01% gain error support 12-bit+ effective system accuracy; MSOP package fits dense PCB layouts. |
| Embedded Data Logger | Medical Instrumentation Front-End |
Use Scenario: Portable environmental logging devices capturing slow-varying parameters (e.g., soil moisture, ambient light) over days or weeks. IC Role / Device Role / Timing Role: Low-power ADC acquiring data at 208sps with automatic nap/sleep transitions between samples. Use Value: No-latency output allows deterministic sampling intervals; internal oscillator eliminates timing component dependencies. |
Use Scenario: Patient vital sign monitors requiring precise, low-noise digitization of biopotential signals (e.g., ECG lead-off detection, respiration). IC Role / Device Role / Timing Role: Precision ADC interfacing to instrumentation amplifiers with minimal external components. Use Value: 50nA input current prevents loading of high-Z sensor paths; 30nV/√Hz reference noise preserves signal integrity. |
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; 16-bit, 860sps max | Requires external reference and level-shifting for 5V systems; better suited for multi-channel, low-pin-count designs | Choose ADS1115IDGSR when channel count >1 and I²C bus availability outweighs need for integrated reference and SPI simplicity |
| MCP3424-E/ST | 4-channel, 18-bit resolution; I²C interface; internal 2.048V reference; 15sps/60sps/240sps/960sps | Higher resolution but slower max rate; fixed 2.048V reference limits input range flexibility vs. LTC2470CMS#PBF's 1.25V | Choose MCP3424-E/ST when 18-bit resolution is mandatory and system can accommodate I²C timing constraints and fixed reference voltage |
Compared with ADS1115IDGSR and MCP3424-E/ST, the LTC2470CMS#PBF provides superior integration (reference + oscillator), simpler SPI interface, lower sleep current, and single-ended input optimized for unipolar sensor interfaces - making it ideal for compact, low-power, single-channel measurement nodes where design simplicity and long-term stability are prioritized.
Availability
LTC2470CMS#PBF is available at Aetrix Electronics and suitable for industrial process control, environmental monitoring, and embedded data acquisition requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC2470CMS#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LTC2470CMS#PBF belongs to Linear's precision delta-sigma ADC product line, engineered for low-power, high-accuracy sensor digitization in space- and energy-constrained industrial and instrumentation applications.
FAQ
What is the operating temperature range for the LTC2470CMS#PBF?
The LTC2470CMS#PBF is specified for 0°C to 70°C operation (C-grade). This is confirmed by the "LTC2470CMS#PBF" ordering code in the Order Information table, where "CMS" denotes the MSOP package and "C" indicates the commercial temperature grade. The device uses internal thermal compensation to maintain reference drift within ±2ppm/°C across this range.
Does the LTC2470CMS#PBF require an external clock source?
No, the LTC2470CMS#PBF does not require an external clock source. It integrates a precision internal oscillator that drives the delta-sigma modulator and digital logic. This eliminates the need for crystals, oscillators, or clock distribution circuitry - a key feature explicitly stated in the Features list and Block Diagram of the LTC2470/LTC2472 datasheet.
How does the LTC2470CMS#PBF handle input overrange and underrange conditions?
The LTC2470CMS#PBF clamps output codes for out-of-range inputs: all zeros (0x0000) for inputs below 0V (underrange), and all ones (0xFFFF) for inputs ≥ VREF (1.25V, overrange). This behavior is defined in the "Input Voltage Range (LTC2470)" section and verified in Table 1 of the datasheet, ensuring predictable saturation without damage or undefined states.
Can the LTC2470CMS#PBF operate from a 3.3V supply?
Yes, the LTC2470CMS#PBF fully supports 3.3V operation. Its supply voltage range is 2.7V to 5.5V, and all electrical characteristics - including reference voltage (1.25V), offset error (±1mV), and supply current (3.5mA typ) - are guaranteed across this range. The datasheet confirms stable VREF vs. VCC performance from 2.7V to 5.5V in Figure G12.
What is the purpose of the COMP pin on the LTC2470CMS#PBF?
The COMP pin on the LTC2470CMS#PBF is the internal reference compensation terminal. It must be connected to a 0.1µF capacitor to GND to stabilize the integrated 1.25V reference, control startup time (~12ms), and minimize transition noise. This is a mandatory connection specified in the Pin Functions section and Figure 3 of the datasheet - omitting it degrades reference accuracy and noise performance.
LTC2470CMS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-TSSOP (0.118", 3.00mm Width)
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 12-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2470CMS#PBF FAQ
1.How can I place an order for LTC2470CMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2470CMS#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 LTC2470CMS#PBF reliable?
The price and inventory of LTC2470CMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2470CMS#PBF is usually 5 days.
3.What payment methods are accepted for LTC2470CMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2470CMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2470CMS#PBF?
LTC2470CMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2470CMS#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 LTC2470CMS#PBF?
For technical support, including LTC2470CMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2470CMS#PBF requirements.
6.How does Aetrix verify that LTC2470CMS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2470CMS#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 LTC2470CMS#PBF meets industry standards.
7.What is the process for return or replacement of LTC2470CMS#PBF?
All LTC2470CMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2470CMS#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 LTC2470CMS#PBF part is unused and in its original packaging.
Return procedure for LTC2470CMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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