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Analog Devices Inc. LTC2450CDC-1#TRMPBF
- Part No.:
- LTC2450CDC-1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC2450CDC-1#TRMPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:262
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Product details
Overview
LTC2450CDC-1#TRMPBF from Analog Devices (formerly Linear Technology) is a low-power, single-ended 16-bit delta-sigma analog-to-digital converter optimized for space-constrained embedded sensing applications. It operates from a single 2.7V to 5.5V supply, uses VCC as its reference, delivers 60 conversions per second with single-cycle settling, and achieves 0.02LSB RMS noise and 16-bit no-missing-codes resolution in a 2mm × 2mm DFN package.
For engineers reviewing the LTC2450CDC-1#TRMPBF datasheet, LTC2450CDC-1#TRMPBF pinout, LTC2450CDC-1#TRMPBF application, or LTC2450CDC-1#TRMPBF equivalent, this page provides verified technical context, SPI interface timing constraints, rail-to-rail input behavior, sleep-mode power management (50nA), and real-world design implications of its proprietary input sampling scheme.
Technical Context
The LTC2450CDC-1#TRMPBF implements a fixed-conversion-time delta-sigma modulator core with internal oscillator-no external timing components required. Its single-cycle settling enables deterministic multiplexed sampling without filter delay compensation.
It uses a 3-wire SPI interface (CS, SCK, SDO) supporting both CPOL = 0 and CPOL = 1 modes, with conversion status monitor capability via SDO level during CS assertion. The device enters <500nA sleep current when CS is high, and holds the last result indefinitely in static register during sleep.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit, no missing codes-guarantees monotonicity and full code coverage across full temperature range. |
| Input Range | Rail-to-rail single-ended (GND to VCC)-simplifies sensor interfacing without level-shifting circuitry. |
| Conversion Rate | Up to 60 sps-fixed 16.6ms conversion time enables precise timing budgeting in polling-based systems. |
| Supply Current | 350μA active, 50nA sleep-enables battery-powered operation with >1-year runtime on coin cell at 1Hz output rate. |
| Reference | VCC as reference-eliminates external reference IC but requires stable supply; LSB size scales with VCC. |
| Noise Performance | 0.02LSB RMS-translates to ~1.2μVRMS at 3V, enabling sub-100μV signal resolution without external amplification. |
| Offset Error | ±0.5mV-directly impacts zero-scale accuracy in direct sensor readout (e.g., thermistor, RTD). |
| Full-Scale Error | ±4LSB-defines end-point linearity deviation; remains stable over temperature due to internal trimming. |
Pinout & Package
Package: 6-lead (2mm × 2mm) plastic DFN with exposed pad (GND). Pin 1 = VCC, Pin 2 = VIN, Pin 3 = GND, Pin 4 = CS, Pin 5 = SDO, Pin 6 = SCK. Exposed pad must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply and reference voltage | Must be bypassed with 10μF + 0.1μF capacitors close to pin; directly defines LSB size and input full-scale range. |
| VIN (Pin 2) | Analog input | Single-ended, rail-to-rail capable; average input sampling current is 50nA-permits direct RC filtering (e.g., 1kΩ/0.1μF) with <1LSB error. |
| GND (Pin 3) | Analog/digital ground | Common return for VCC reference and digital logic; low-impedance connection critical to avoid reference shift. |
| CS (Pin 4) | Active-low chip select | Controls SDO output enable and sleep entry/exit; HIGH forces <500nA sleep mode; LOW initiates data output or status monitoring. |
| SDO (Pin 5) | Three-state serial data output | Outputs MSB-first 16-bit result; indicates conversion status (HIGH = in progress, LOW = complete) when CS is LOW and SCK is HIGH. |
| SCK (Pin 6) | Serial clock input | Drives data shift-out timing; supports idle-high (CPOL=1) and idle-low (CPOL=0); edge rate control (10ns) recommended to avoid conversion interference. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated oscillator | Eliminates external crystal/capacitor-reduces BOM count and board area in ultra-compact designs. |
| Proprietary input sampling | Reduces average input current to 50nA-enables direct connection to high-impedance sensors without buffer op-amps. |
| Single-cycle settling | Removes need for post-mux settling delays-simplifies firmware for multi-channel scanning systems. |
| Auto sleep mode | Transitions to <500nA after conversion-critical for energy harvesting and long-life battery applications. |
| Rail-to-rail input with VCC reference | Supports direct interface to 0–3.3V or 0–5V sensors (e.g., voltage outputs from pressure transducers) without scaling resistors. |
Applications
| Environmental Monitoring | Industrial Process Control |
|---|---|
Use Scenario: Measuring temperature, humidity, or gas concentration using analog-output sensors in remote, battery-powered nodes. IC Role / Device Role / Timing Role: Primary ADC digitizing sensor outputs at 1–10Hz rates; manages own power state via CS-controlled sleep. Use Value: 50nA sleep current extends node lifetime to years on CR2032; rail-to-rail input accommodates 0–VCC sensor spans without signal conditioning. | Use Scenario: Digitizing 4–20mA loop signals or thermocouple outputs in PLC I/O modules with tight thermal and space constraints. IC Role / Device Role / Timing Role: High-accuracy front-end ADC with deterministic 16.6ms conversion time for synchronized sampling across multiple channels. Use Value: Single-cycle settling eliminates inter-channel delay calibration; ±0.5mV offset ensures <0.1%FS accuracy in 12-bit-equivalent industrial ranges. |
| Direct Temperature Measurements | Embedded ADC Upgrades |
Use Scenario: Reading NTC thermistors or RTDs in medical wearables or portable test equipment where board space is limited to <10mm². IC Role / Device Role / Timing Role: Precision 16-bit ADC replacing legacy 12-bit parts; leverages VCC reference to simplify supply architecture. Use Value: 0.02LSB RMS noise resolves <100μK temperature changes with 10kΩ NTC; 2mm × 2mm DFN fits under connectors or displays. | Use Scenario: Retrofitting legacy microcontroller systems with external ADCs lacking integrated converters or requiring higher resolution than on-chip peripherals. IC Role / Device Role / Timing Role: Drop-in SPI ADC upgrade adding 16-bit precision and ultra-low quiescent power without changing MCU firmware timing logic. Use Value: Compatible with standard SPI drivers; fixed conversion time allows reuse of existing polling intervals; no external clock or reference needed. |
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, 860μA active current | Requires I²C bus and external PGA configuration; better for multi-sensor differential measurements | Choose ADS1115IDGSR when multi-channel differential inputs or programmable gain are required; avoid if SPI-only or ultra-low sleep current (<100nA) is mandatory. |
| MCP3424-E/ST | 4-channel, 18-bit resolution, I²C interface, 1.2μA sleep current, no internal oscillator | Higher resolution but slower (up to 15 sps), requires external clock; larger 20-pin TSSOP package | Choose MCP3424-E/ST when 18-bit precision justifies slower speed and larger footprint; avoid if 2mm × 2mm DFN or 60 sps rate is required. |
Compared with ADS1115IDGSR and MCP3424-E/ST, the LTC2450CDC-1#TRMPBF uniquely combines SPI interface, 60 sps rate, 50nA sleep current, and 2mm × 2mm DFN in a single-ended 16-bit solution-making it optimal for compact, battery-sensitive, single-input sensing nodes where simplicity and minimal external components are critical.
Availability
LTC2450CDC-1#TRMPBF is available at Aetrix Electronics and suitable for environmental monitoring, industrial process control, and direct temperature measurement applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC2450CDC-1#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-1#TRMPBF belongs to ADI's precision delta-sigma ADC product line, designed specifically for ultra-low-power, space-constrained sensing applications where simplicity, rail-to-rail input, and guaranteed 16-bit performance are essential.
FAQ
What is the absolute maximum input voltage for the LTC2450CDC-1#TRMPBF?
The absolute maximum analog input voltage for the LTC2450CDC-1#TRMPBF is –0.3V to (VCC + 0.3V), as specified in the Absolute Maximum Ratings table. Exceeding this range risks permanent damage. For reliable operation, VIN must remain within the GND-to-VCC rail-to-rail range, where the device guarantees 16-bit linearity and no missing codes. This constraint applies regardless of supply voltage within the 2.7V–5.5V operating range.
Does the LTC2450CDC-1#TRMPBF require an external reference voltage?
No, the LTC2450CDC-1#TRMPBF does not require an external reference voltage. It uses the VCC supply rail as its reference, simplifying system design and reducing component count. This means the full-scale input range is always GND to VCC, and LSB size scales linearly with VCC (e.g., ~45.8μV/LSB at 3V, ~76.3μV/LSB at 5V). Designers must ensure VCC stability to maintain accuracy, as reference drift directly affects conversion results.
How does the LTC2450CDC-1#TRMPBF achieve single-cycle settling time?
The LTC2450CDC-1#TRMPBF achieves single-cycle settling time through its proprietary delta-sigma modulator architecture and integrated input sampling scheme, which eliminates the need for traditional digital filter settling delays. Unlike oversampled ADCs requiring multiple conversions to settle after channel changes, the LTC2450CDC-1#TRMPBF delivers a valid, fully settled 16-bit result every 16.6ms-enabling true multiplexed sampling without firmware wait states or redundant reads. This behavior is confirmed in the "Single Conversion Settling Time for Multiplexed Applications" feature list.
What is the minimum and maximum SCK frequency supported by the LTC2450CDC-1#TRMPBF?
The LTC2450CDC-1#TRMPBF supports an SCK frequency range of 0 to 2MHz, with timing specifications guaranteeing reliable operation up to 2MHz. The datasheet specifies minimum SCK low and high periods of 250ns each, implying a practical maximum clock frequency of 2MHz. Lower frequencies-including DC (SCK held static)-are permitted for status monitoring or low-power operation, but SCK transitions during conversion may introduce noise; thus, stable SCK levels (HIGH or LOW) are recommended during the CONVERT state.
Can the LTC2450CDC-1#TRMPBF operate from a 2.5V supply?
No, the LTC2450CDC-1#TRMPBF cannot operate from a 2.5V supply. Its specified minimum supply voltage is 2.7V, and operation below this threshold may cause undefined behavior or failure to meet specifications. The Absolute Maximum Ratings table confirms VCC must be ≥ –0.3V, but the Electrical Characteristics section explicitly defines the operating range as 2.7V to 5.5V. Attempting to power the LTC2450CDC-1#TRMPBF at 2.5V risks incomplete power-on reset, inaccurate conversions, or non-functional SPI communication.
LTC2450CDC-1#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-1#TRMPBF FAQ
1.How can I place an order for LTC2450CDC-1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2450CDC-1#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-1#TRMPBF reliable?
The price and inventory of LTC2450CDC-1#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-1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2450CDC-1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2450CDC-1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2450CDC-1#TRMPBF?
LTC2450CDC-1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2450CDC-1#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-1#TRMPBF?
For technical support, including LTC2450CDC-1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2450CDC-1#TRMPBF requirements.
6.How does Aetrix verify that LTC2450CDC-1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2450CDC-1#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-1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2450CDC-1#TRMPBF?
All LTC2450CDC-1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2450CDC-1#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-1#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2450CDC-1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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