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Analog Devices Inc. LTC2470IMS#TRPBF
- Part No.:
- LTC2470IMS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-TSSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2470IMS#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:13,516
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Product details
Overview
LTC2470IMS#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), SPI interface, and selectable 208sps/833sps output rate - designed for low-power system monitoring and embedded instrumentation where supply current ≤3.5mA (typ) and sleep current ≤2µA (max) are critical.
For engineers reviewing the LTC2470IMS#TRPBF datasheet, LTC2470IMS#TRPBF pinout, LTC2470IMS#TRPBF application, or LTC2470IMS#TRPBF equivalent, key selection criteria include guaranteed 2ppm/°C reference drift (I-grade), ±1mV offset error, 0.01% gain error, single-cycle settling for multiplexed inputs, and MSOP-12 package compatibility with legacy board layouts.
Technical Context
The LTC2470IMS#TRPBF implements a proprietary input sampling scheme that reduces average input current to 50nA - enabling direct RC filter interfacing without significant error. Its internal oscillator eliminates external timing components, and its no-latency ∆Σ architecture delivers one valid 16-bit result per conversion with no filter settling delay.
It operates across –40°C to +85°C (I-grade), supports 2.7V–5.5V supply, and uses SPI with CPOL = 0 or 1. Conversion time is 4.0ms (208sps) or 1.0ms (833sps); reference startup time is 12ms (with 0.1µF COMP/REFOUT capacitors), and power-down sequencing is fully controlled via SDI programming bits (SPD/SLP).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit direct binary output - delivers 65,536 discrete codes for high-fidelity analog measurement. |
| Reference Voltage | 1.25V ±3mV (1.247V–1.253V) - sets full-scale input range; enables accurate ratiometric or absolute measurements. |
| Reference Drift | ±5ppm/°C max (I-grade) - ensures <±0.5mV total drift over –40°C to +85°C, critical for uncalibrated industrial sensing. |
| Offset Error | ±1mV (typ), ±2.5mV (max) - directly impacts zero-point accuracy in pressure, temperature, or current sense applications. |
| Gain Error | ±0.01% (typ), ±0.25% (max) - limits full-scale linearity; supports <0.1% end-point accuracy after single-point calibration. |
| Supply Current | 3.5mA (typ, conversion), 2µA (max, sleep) - enables battery-powered operation >1 year on coin cell with periodic wake-up. |
| Input Type | Single-ended (IN to GND, 0V–VREF) - simplifies sensor interface vs differential; eliminates need for matched input paths. |
Pinout & Package
Package: 12-lead MSOP (3mm × 4.9mm), exposed pad optional; RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFOUT (1) | Reference output | Nominally 1.25V; sets ADC full-scale range; requires 0.1µF bypass to GND for stability and low noise. |
| COMP (2) | Reference compensation | Connects to 0.1µF capacitor to GND; controls reference startup time and transition noise performance. |
| CS (3) | Chip select (active-low) | Enables SDO output and initiates DATA INPUT/OUTPUT state; rising edge aborts transfer and starts new conversion. |
| SDI (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 (5) | Serial clock input | Drives SPI timing; supports CPOL=0 or CPOL=1; falling edge clocks out data (SDO), rising edge latches input (SDI). |
| SDO (6) | Serial data output | 3-state output; delivers 16-bit MSB-first result; high-impedance when CS is high. |
| GND (7,11) | Ground | Primary analog/digital return; pins 7 and 11 must connect to low-impedance ground plane. |
| REF– (8) | Reference negative input | Tied to system ground or sensor ground sense point; defines zero-input level for ADC. |
| IN (9) | Analog input (single-ended) | Accepts 0V to VREF signal; low input leakage (<±1nA) minimizes RC filter error. |
| GND (10) | Input ground reference | Dedicated GND return for IN pin; improves PSRR and reduces ground bounce coupling. |
| VCC (12) | Positive supply | 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 ∆Σ architecture | Delivers one valid 16-bit result per conversion cycle - eliminates filter settling delay and enables true multiplexed channel sampling. |
| Proprietary input sampling | Reduces average input current to 50nA - allows direct use of 1kΩ/0.1µF RC filters with <1LSB added error. |
| User-selectable output rate | 208sps (4ms conv.) or 833sps (1ms conv.) - balances resolution, speed, and anti-aliasing filter complexity. |
| Integrated 1.25V reference | 2ppm/°C max drift (I-grade), 0.1% initial accuracy - removes need for external reference and saves PCB area/cost. |
| Configurable power management | Programmable sleep mode reduces current to 2µA (max); reference can be powered down independently to optimize energy use. |
Applications
| Industrial Process Monitoring | Environmental Sensor Node |
|---|---|
|
Use Scenario: Continuous monitoring of 4–20mA loop transmitters, RTD bridges, or thermistor networks in PLC I/O modules. IC Role / Device Role / Timing Role: Single-ended ADC digitizing conditioned analog signals; provides stable reference and low-drift measurement over wide temperature range. Use Value: Eliminates external reference and calibration components; ±5ppm/°C drift ensures <±0.5mV error over –40°C to +85°C without recalibration. |
Use Scenario: Battery-powered air quality sensor node measuring CO₂, humidity, and VOC levels with multi-decade deployment. IC Role / Device Role / Timing Role: Low-power ADC acquiring slow-varying sensor outputs; enters 2µA sleep between readings to extend battery life. Use Value: 50nA average input current enables direct RC filtering; 2µA sleep current supports >5-year operation on CR2032 cell at 1Hz sampling. |
| Embedded System Health Monitoring | Portable Instrumentation Upgrade |
|
Use Scenario: Real-time voltage, current, and temperature supervision inside medical or telecom power supplies. IC Role / Device Role / Timing Role: High-accuracy ADC capturing rail voltages and thermal feedback; interfaces via SPI to host MCU with minimal firmware overhead. Use Value: No-latency operation ensures immediate response to fault conditions; 0.01% gain error supports precise margin testing without software correction. |
Use Scenario: Retrofitting legacy handheld multimeters or data loggers with higher-resolution ADC capability. IC Role / Device Role / Timing Role: Pin-compatible upgrade replacing older 12–14-bit converters; retains existing MSOP footprint and SPI control logic. Use Value: 16-bit resolution and integrated reference deliver immediate accuracy improvement; 12-lead MSOP fits same land pattern as many legacy ADCs. |
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, I²C interface, no integrated reference (requires external 2.048V ref), 880µA active current. | Better for multi-channel, low-pin-count I²C systems; lacks sleep mode below 150µA. | Choose ADS1115IDGSR if I²C bus integration and 4-channel scanning outweigh need for ultra-low sleep current and integrated reference. |
| MCP3424-E/ST | 4-channel, I²C, 2.048V internal reference (15ppm/°C), 1mA active current, no sleep mode. | Suitable for cost-sensitive industrial sensors; higher reference drift limits uncalibrated accuracy over temperature. | Choose MCP3424-E/ST when board space is constrained and 4-channel acquisition justifies trade-off in reference stability and power efficiency. |
Compared with ADS1115IDGSR and MCP3424-E/ST, the LTC2470IMS#TRPBF uniquely combines integrated 1.25V reference (±5ppm/°C), 2µA sleep current, and SPI interface in an MSOP-12 package - making it optimal for single-channel, battery-powered, or thermally demanding applications requiring long-term accuracy without calibration.
Availability
LTC2470IMS#TRPBF is available at Aetrix Electronics and suitable for industrial process control, environmental sensor nodes, and embedded system health monitoring requiring stable component supply, extended temperature support (–40°C to +85°C), and long-lifecycle availability.
Supply support for LTC2470IMS#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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies.
The LTC2470IMS#TRPBF belongs to the Linear Technology Precision Delta-Sigma ADC family, engineered for low-power, high-accuracy measurement in space-constrained industrial and instrumentation systems.
FAQ
What is the operating temperature range for the LTC2470IMS#TRPBF?
The LTC2470IMS#TRPBF is rated for –40°C to +85°C (I-grade). This specification is guaranteed across all electrical parameters including reference drift (±5ppm/°C max), offset error (±2.5mV max), and supply current (2µA max in sleep mode). The MSOP-12 package's θJA of 130°C/W supports reliable operation in sealed enclosures without forced airflow.
Does the LTC2470IMS#TRPBF require an external crystal or oscillator?
No, the LTC2470IMS#TRPBF includes a fully integrated oscillator - no external timing components are required. This simplifies layout, reduces BOM count, and eliminates oscillator start-up delays or frequency tolerance concerns. The internal clock enables guaranteed conversion times of 4.0ms (208sps) or 1.0ms (833sps) across the full temperature and supply range.
How does the LTC2470IMS#TRPBF achieve 2µA sleep current?
The LTC2470IMS#TRPBF achieves ≤2µA sleep current by powering down both the ADC core and the integrated 1.25V reference when configured in sleep mode (SLP = 1 via SDI). Reference shutdown eliminates ~3.5mA quiescent draw; only bias circuitry remains active. Wake-up occurs automatically on CS assertion, with reference settling time determined by COMP/REFOUT capacitor values (e.g., 12ms for 0.1µF).
Can the LTC2470IMS#TRPBF interface directly with a thermistor or RTD bridge?
Yes, the LTC2470IMS#TRPBF supports direct connection to resistive sensors via its low-input-current architecture (50nA average). When paired with a simple 1kΩ series resistor and 0.1µF capacitor, the resulting RC filter introduces <1LSB error - eliminating need for op-amp buffers or complex anti-aliasing networks. Its 0V–VREF input range aligns naturally with ratiometric bridge excitation schemes.
Is the LTC2470IMS#TRPBF pin-compatible with other devices in the LTC247x family?
Yes, the LTC2470IMS#TRPBF is pin- and software-compatible with the LTC2472 (differential version) and shares identical MSOP-12 pinout and SPI command structure. This allows hardware reuse across single-ended and differential designs, and simplifies firmware development - only the input configuration (IN vs IN+/IN–) and data interpretation differ between variants.
LTC2470IMS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-TSSOP (0.118", 3.00mm Width)
- 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 12-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2470IMS#TRPBF FAQ
1.How can I place an order for LTC2470IMS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2470IMS#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 LTC2470IMS#TRPBF reliable?
The price and inventory of LTC2470IMS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2470IMS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2470IMS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2470IMS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2470IMS#TRPBF?
LTC2470IMS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2470IMS#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 LTC2470IMS#TRPBF?
For technical support, including LTC2470IMS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2470IMS#TRPBF requirements.
6.How does Aetrix verify that LTC2470IMS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2470IMS#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 LTC2470IMS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2470IMS#TRPBF?
All LTC2470IMS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2470IMS#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 LTC2470IMS#TRPBF part is unused and in its original packaging.
Return procedure for LTC2470IMS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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