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Analog Devices Inc. LTC2450CDC#TRMPBF
- Part No.:
- LTC2450CDC#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC2450CDC#TRMPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,664
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Product details
Overview
LTC2450CDC#TRMPBF from Analog Devices (acquired Linear Technology) is a 16-bit delta-sigma analog-to-digital converter with single-ended rail-to-rail input (0 V to VCC), SPI interface, and integrated oscillator. It delivers 2 LSB INL, 0.02 LSB RMS noise, 30 sps throughput, and auto-sleep mode drawing <200 nA - used in embedded environmental monitoring and low-power sensor interfaces.
For engineers reviewing the LTC2450CDC#TRMPBF datasheet, LTC2450CDC#TRMPBF pinout, LTC2450CDC#TRMPBF application, or LTC2450CDC#TRMPBF equivalent, key selection criteria include guaranteed no-missing-codes resolution, internal reference tied to VCC, single-cycle settling for multiplexed inputs, ultra-low input sampling current (50 nA), and 2 mm × 2 mm DFN package compatibility with space-constrained PCB layouts.
Technical Context
The LTC2450CDC#TRMPBF employs a delta-sigma modulator core with continuous internal offset and full-scale calibration per conversion, ensuring stability over temperature (0°C to 70°C) and time without user intervention. Its proprietary input sampling scheme reduces average input current by orders of magnitude versus conventional architectures.
It operates on a single 2.7 V to 5.5 V supply, uses VCC as its reference voltage, and achieves true rail-to-rail input range (GND to VCC). The 3-wire SPI interface supports both CPOL = 0 and CPOL = 1 modes, with fixed 33.3 ms conversion time and automatic transition between CONVERT → SLEEP → DATA OUTPUT states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit, no missing codes - guarantees monotonicity and full 65536-code output range across operating conditions. |
| INL | ±2 LSB max - ensures linearity error remains below 0.003% of full scale, critical for precision measurement systems. |
| Offset Error | ±2 LSB max - enables accurate zero-point referencing without external trimming in industrial sensor front-ends. |
| Full-Scale Error | ±4 LSB max - maintains end-point accuracy when using VCC as reference, supporting direct battery-supplied operation. |
| Sampling Current | 50 nA typical - allows direct connection to high-impedance sources (e.g., thermistors, RTDs) without buffer amplifiers. |
| Supply Current | 350 μA during conversion, <200 nA in sleep - enables microamp-level system power budgets in battery-powered IoT nodes. |
| Conversion Rate | 30 sps maximum - provides deterministic timing for synchronized multi-channel acquisition with minimal software overhead. |
| Input Range | 0 V to VCC, single-ended - eliminates need for level-shifting circuitry when interfacing with unipolar sensors or DAC outputs. |
Pinout & Package
Package: 6-lead (2 mm × 2 mm) plastic DFN with exposed pad (Pin 7 = GND, must be soldered to PCB ground plane).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply and reference voltage input | Supplies power and sets ADC full-scale range; requires 10 μF + 0.1 μF bypassing close to pin for stable reference. |
| VIN (Pin 2) | Analog input voltage | Accepts rail-to-rail single-ended signal (0 V to VCC); input leakage <10 nA enables high-Z source interfacing. |
| GND (Pin 3) | Analog/digital ground reference | Common return for VCC, VIN, and digital I/O; low-impedance connection required to minimize reference error. |
| CS (Pin 4) | Active-low chip select | Enables SDO output when LOW; HIGH places SDO in high-Z and triggers sleep mode (<200 nA ICC). |
| SDO (Pin 5) | 3-state serial data output | Outputs MSB-first 16-bit result; indicates conversion status (HIGH = in progress, LOW = complete) when CS is asserted. |
| SCK (Pin 6) | Serial clock input | Synchronizes data output; supports idle-high (CPOL=1) or idle-low (CPOL=0); max 2 MHz frequency. |
| Exposed Pad (Pin 7) | Thermal and electrical ground | Must be soldered to PCB ground plane to ensure thermal performance and reduce noise coupling into analog path. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated oscillator | Eliminates all external timing components - reduces BOM count and layout area in compact sensor modules. |
| Single-cycle settling | Enables true multiplexed operation without settling delay - simplifies firmware for multi-sensor polling architectures. |
| Auto-sleep mode | Reduces average power to <50 μW at 1 Hz sampling (2.7 V supply) - extends battery life in remote environmental loggers. |
| Continuous calibration | Per-conversion offset and full-scale correction - maintains accuracy over temperature and aging without host intervention. |
| Ultra-low input sampling current | 50 nA average - permits RC filter (1 kΩ/0.1 μF) with <1 LSB error, enabling anti-aliasing without active buffers. |
| Rail-to-rail input with VCC reference | Supports direct interface to unregulated battery rails (2.7–5.5 V) - removes need for separate precision reference IC. |
Applications
| Environmental Monitoring | Industrial Process Control |
|---|---|
|
Use Scenario: Battery-powered wireless node measuring temperature, humidity, and air quality in HVAC ducts or agricultural greenhouses. IC Role / Device Role / Timing Role: Primary ADC digitizing analog outputs from thermistors, capacitive humidity sensors, and gas detection elements. Use Value: 50 nA input current and auto-sleep enable >5-year battery life; 2 LSB INL ensures compliance with ISO 14644 cleanroom monitoring thresholds. |
Use Scenario: Modular PLC analog input module acquiring signals from pressure transducers and flow meters in factory automation. IC Role / Device Role / Timing Role: High-accuracy, low-drift ADC channel in isolated 4–20 mA loop receiver subsystems. Use Value: Continuous internal calibration maintains ±0.1% FS accuracy over –40°C to 70°C ambient; SPI interface simplifies FPGA-based data aggregation. |
| Embedded Sensor Upgrades | Data Acquisition Systems |
|
Use Scenario: Retrofitting legacy 12-bit microcontroller-based equipment (e.g., medical handhelds, portable test gear) with higher-resolution sensing. IC Role / Device Role / Timing Role: Drop-in ADC replacement adding 4 extra bits of resolution without changing MCU firmware timing logic. Use Value: Same 6-pin DFN footprint and 3-wire SPI protocol as many legacy parts; single-cycle settling avoids reworking interrupt service routines. |
Use Scenario: Low-cost benchtop DAQ unit for educational labs or field service diagnostics requiring 16-bit precision at ≤30 sps. IC Role / Device Role / Timing Role: Core ADC in USB-connected signal conditioning board with software-configurable gain and sampling rate. Use Value: 0.02 LSB RMS noise and relaxed anti-aliasing (due to high oversampling ratio) eliminate need for steep analog filters - reducing component count and cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1115IDGSR | 4-channel, programmable gain amplifier (PGA), I²C interface, 860 sps max - lacks integrated oscillator and auto-sleep current <200 nA. | Preferred for multi-channel, variable-gain systems; less suitable for ultra-low-power single-input designs. | Select ADS1115IDGSR when needing hardware-configurable PGA or I²C bus compatibility; LTC2450CDC#TRMPBF better for minimal pin count and lowest sleep current. |
| MCP3421A0T-E/CH | 18-bit resolution, I²C interface, 15 sps (18-bit) / 60 sps (12-bit), 1 μA sleep current - no SPI, larger 8-pin SOIC package. | Better for higher-resolution static measurements; not optimal for space-constrained or SPI-native MCU platforms. | Choose MCP3421A0T-E/CH for sub-10 ppm accuracy requirements; LTC2450CDC#TRMPBF preferred for 2 mm × 2 mm DFN footprint and deterministic 33.3 ms conversion timing. |
Compared with ADS1115IDGSR and MCP3421A0T-E/CH, the LTC2450CDC#TRMPBF uniquely combines SPI simplicity, 2 mm × 2 mm DFN size, <200 nA sleep current, and single-cycle settling - making it optimal for compact, battery-operated, single-input precision sensing where layout area and quiescent power are primary constraints.
Availability
LTC2450CDC#TRMPBF is available at Aetrix Electronics and suitable for environmental monitoring, industrial process control, and embedded sensor upgrades requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC2450CDC#TRMPBF 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 LTC2450CDC#TRMPBF belongs to ADI's precision delta-sigma ADC product line, designed specifically for low-power, space-constrained applications demanding high DC accuracy, rail-to-rail input, and minimal external components - such as portable instrumentation and wireless sensor nodes.
FAQ
What is the operating temperature range for the LTC2450CDC#TRMPBF?
The LTC2450CDC#TRMPBF is specified for 0°C to 70°C ambient operation (Commercial grade). This is confirmed by the "C" suffix in the part number and the ordering information table, which lists LTC2450CDC#TRMPBF under "0°C to 70°C" temperature range. The device's internal calibration algorithms maintain accuracy across this full range without user intervention.
Does the LTC2450CDC#TRMPBF require an external crystal or oscillator?
No, the LTC2450CDC#TRMPBF does not require any external timing components. It integrates a precision oscillator that drives the delta-sigma modulator and conversion engine. This is explicitly stated in the Features section and confirmed in the Typical Application schematic, where no external crystal or resonator is shown - reducing BOM cost and PCB area.
How does the LTC2450CDC#TRMPBF achieve rail-to-rail input capability?
The LTC2450CDC#TRMPBF achieves rail-to-rail input (0 V to VCC) by using its VCC supply as the positive reference voltage and implementing a proprietary input sampling architecture that avoids internal voltage headroom penalties. As stated in the Applications Information section, "the converter will theoretically output an 'all zero' digital result when the input is at ground… and an 'all one' digital result when the input is at VCC."
What is the conversion time and data output format of the LTC2450CDC#TRMPBF?
The LTC2450CDC#TRMPBF has a fixed conversion time of 33.3 ms (typical), with a maximum of 42 ms. It outputs a 16-bit direct binary result, MSB first, via the SDO pin synchronized to the SCK input. This is documented in the Timing Characteristics table (tCONV = 29–42 ms) and Functional Block Diagram, and verified in Figure 3 (Data Output Timing).
Can the LTC2450CDC#TRMPBF operate from a 3.3 V supply, and what is its reference voltage?
Yes, the LTC2450CDC#TRMPBF operates from 2.7 V to 5.5 V, including standard 3.3 V supplies. Its reference voltage is internally tied to VCC - meaning the full-scale range is exactly 0 V to VCC. This is confirmed in the DESCRIPTION section ("uses its power supply voltage as the reference voltage") and Electrical Characteristics table (VIN input range = 0 to VCC).
LTC2450CDC#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 30
- 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:
- Supply
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 6-DFN (2x2)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2450CDC#TRMPBF FAQ
1.How can I place an order for LTC2450CDC#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2450CDC#TRMPBF 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 LTC2450CDC#TRMPBF reliable?
The price and inventory of LTC2450CDC#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2450CDC#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2450CDC#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2450CDC#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2450CDC#TRMPBF?
LTC2450CDC#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2450CDC#TRMPBF 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 LTC2450CDC#TRMPBF?
For technical support, including LTC2450CDC#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2450CDC#TRMPBF requirements.
6.How does Aetrix verify that LTC2450CDC#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2450CDC#TRMPBF 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 LTC2450CDC#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2450CDC#TRMPBF?
All LTC2450CDC#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2450CDC#TRMPBF, 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 LTC2450CDC#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2450CDC#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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