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Analog Devices Inc. LTC2450CDC#TRPBF
- Part No.:
- LTC2450CDC#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC2450CDC#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:11,605
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Product details
Overview
LTC2450CDC#TRPBF from Analog Devices (formerly 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 conversion rate, and ultra-low 50 nA sleep current. It is used in embedded environmental monitoring and precision system-level voltage sensing where minimal board space and low power are critical.
For engineers reviewing the LTC2450CDC#TRPBF datasheet, LTC2450CDC#TRPBF pinout, LTC2450CDC#TRPBF application, or LTC2450CDC#TRPBF equivalent, key selection considerations include its 2 mm × 2 mm DFN-6 package, internal reference tied to VCC, single-cycle settling for multiplexed inputs, continuous offset/full-scale calibration, and guaranteed no-missing-codes performance across 0°C to 70°C.
Technical Context
The LTC2450CDC#TRPBF implements a delta-sigma modulator core with proprietary input sampling that reduces average input current to 50 nA-enabling direct RC filter interfacing without buffering. Its internal oscillator eliminates external timing components and ensures fixed 33.3 ms conversion time.
It operates in three deterministic states-CONVERT, SLEEP, and DATA OUTPUT-with CS-controlled state transitions and MSB-first serial data output via SDO synchronized to SCK. Calibration occurs every conversion, maintaining accuracy over temperature and time without user intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit, guaranteed no missing codes-ensures full 65536-code range is utilized across full input span. |
| INL | ±2 LSB max-limits end-point linearity error to ≤0.003% of full scale at 3V/5V supply. |
| RMS Noise | 0.02 LSB typical-translates to ~1.5 µV RMS at 3V reference, enabling sub-millivolt measurement resolution. |
| Conversion Rate | 30 sps nominal-fixed 33.3 ms conversion time enables deterministic timing for multiplexed sensor polling. |
| Sleep Current | 50 nA typical-reduces average power to <50 µW at 1 Hz sampling from 2.7V, ideal for battery-powered nodes. |
| Input Range | 0 V to VCC single-ended-supports rail-to-rail sensing without level-shifting or external reference. |
| Supply Range | 2.7 V to 5.5 V-allows direct operation from common microcontroller I/O rails or Li-ion battery systems. |
Pinout & Package
Package: 6-lead, 2 mm × 2 mm plastic DFN with exposed pad (Pin 7 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply and reference voltage input | Supplies power and serves as ADC reference; must be bypassed with 10 µF + 0.1 µF capacitors close to pin. |
| VIN (Pin 2) | Analog input | Single-ended, rail-to-rail input (0 V to VCC); accepts up to ±0.3 V beyond rails per absolute max rating. |
| GND (Pin 3) | Analog/digital ground | Common return for VCC, VIN, and digital signals; low-impedance connection to ground plane required. |
| CS (Pin 4) | Active-low chip select | Controls SDO output enable and state transitions; HIGH places SDO in Hi-Z, LOW initiates DATA OUTPUT. |
| SDO (Pin 5) | Serial data output | Three-state output delivering 16-bit MSB-first result; also indicates conversion status (HIGH = in progress). |
| SCK (Pin 6) | Serial clock input | Edge-triggered clock for data readout; supports CPOL = 0 or 1; idle state determines status monitoring capability. |
| Exposed Pad (Pin 7) | Thermal & electrical ground | Must be soldered to PCB ground; not optional-required for thermal dissipation and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated oscillator | Eliminates external crystal/capacitor-reduces BOM count and layout sensitivity while guaranteeing stable conversion timing. |
| Proprietary input sampling | Reduces average input current to 50 nA-permits use of simple 1 kΩ/0.1 µF RC filter with <1 LSB error, avoiding op-amp buffers. |
| Continuous calibration | Per-conversion offset and full-scale correction-maintains 2 LSB INL and 4 LSB full-scale error over temperature without firmware overhead. |
| Single-cycle settling | Delivers valid result after one conversion period-enables true time-division multiplexing of multiple sensors without settling delay penalties. |
| SPI-compatible 3-wire interface | Supports both CPOL = 0 and CPOL = 1 modes-enables flexible integration with diverse microcontrollers and allows conversion status monitoring via SDO. |
Applications
| Environmental Sensor Node | Industrial System Monitor |
|---|---|
Use Scenario: Battery-powered wireless node measuring temperature, humidity, and ambient light using resistive or voltage-output sensors. IC Role / Device Role / Timing Role: Primary ADC digitizing multiple analog sensor outputs with rail-to-rail input range and ultra-low sleep current. Use Value: Enables >5-year battery life at 1 sample/second due to 50 nA sleep current and eliminates need for external reference or timing components. |
Use Scenario: PLC or motor drive control board monitoring supply rail voltages, heatsink temperatures, and current sense feedback. IC Role / Device Role / Timing Role: Precision voltage monitor providing calibrated 16-bit readings of DC bus, auxiliary supplies, and isolated analog feedback paths. Use Value: Delivers 2 LSB INL and continuous calibration-ensuring long-term accuracy without recalibration across industrial temperature range (0°C to 70°C). |
| Embedded Data Logger | Medical Instrument Front-End |
Use Scenario: Portable diagnostic device logging ECG-derived biopotentials, respiration waveforms, or pressure transducer outputs. IC Role / Device Role / Timing Role: Low-noise, low-power ADC capturing slow-varying physiological signals with minimal power draw between samples. Use Value: 0.02 LSB RMS noise (~1.5 µV at 3V) and single-ended input simplify front-end design-no instrumentation amplifier needed for high-impedance sources. |
Use Scenario: Handheld patient monitor acquiring battery-supplied analog sensor data including SpO₂, NIBP, and temperature. IC Role / Device Role / Timing Role: System-level ADC handling multiple calibrated sensor channels with deterministic 33.3 ms conversion latency. Use Value: Fixed conversion time and auto-sleep mode allow precise power budgeting and predictable MCU wake-up scheduling in safety-critical applications. |
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, I²C interface, programmable gain amplifier (PGA), 860 µA active current, no internal oscillator. | Requires external clock source and I²C host; better suited for multi-channel, variable-gain systems with higher power budget. | Select ADS1115IDGSR when multi-input channel aggregation or PGA flexibility outweighs need for lowest sleep current and SPI simplicity. |
| MCP3424-E/ST | 4-channel, I²C interface, 18-bit resolution, 250 µA active current, internal reference only (2.048 V), no rail-to-rail input. | Limited to 2.048 V reference and 0–2.048 V input range; requires level-shifting for VCC-referenced signals above 2.048 V. | Choose MCP3424-E/ST when higher resolution is mandatory and input signal range permits fixed 2.048 V reference usage. |
Compared with ADS1115IDGSR and MCP3424-E/ST, the LTC2450CDC#TRPBF uniquely combines rail-to-rail single-ended input, VCC-referenced operation, 50 nA sleep current, and integrated oscillator in a 2 mm × 2 mm footprint-making it optimal for space-constrained, single-channel, ultra-low-power sensing where simplicity and deterministic timing are prioritized.
Availability
LTC2450CDC#TRPBF is available at Aetrix Electronics and suitable for environmental monitoring, industrial system supervision, and embedded data acquisition requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for LTC2450CDC#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, 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#TRPBF belongs to ADI's precision delta-sigma ADC product line, designed specifically for space- and power-constrained applications demanding high resolution, low noise, and minimal external components-such as portable instrumentation and distributed sensor networks.
FAQ
What is the operating temperature range for the LTC2450CDC#TRPBF?
The LTC2450CDC#TRPBF is rated for 0°C to 70°C ambient operation (Commercial grade). This is confirmed by the "CDC" suffix in the part number and the "LTC2450C" designation in the Absolute Maximum Ratings table. The device maintains full 16-bit performance-including 2 LSB INL and 0.02 LSB RMS noise-across this range due to on-chip continuous calibration algorithms.
Does the LTC2450CDC#TRPBF require an external reference voltage?
No, the LTC2450CDC#TRPBF uses its VCC supply as the reference voltage-no external reference is needed. The input range is 0 V to VCC, and resolution remains 1 LSB regardless of VCC value (2.7 V to 5.5 V). While INL, offset, and full-scale errors vary slightly with VCC, the device is fully specified and characterized across the entire supply range.
How does the LTC2450CDC#TRPBF achieve such low input sampling current?
The LTC2450CDC#TRPBF employs a proprietary input sampling architecture that reduces average input current to 50 nA-several orders of magnitude lower than conventional delta-sigma ADCs. This allows direct interface with simple RC filters (e.g., 1 kΩ/0.1 µF) without op-amp buffering, minimizing error and component count while preserving accuracy.
Can the LTC2450CDC#TRPBF be used in 2-wire SPI mode?
Yes-the LTC2450CDC#TRPBF supports 2-wire operation by hardwiring CS to GND. In this mode, SDO status monitoring is retained for CPOL = 1 (idle-high clock), but sleep mode is disabled and abort functionality is lost. The device enters DATA OUTPUT immediately after conversion, and new conversions are triggered by SCK edges (17th pulse for CPOL = 1, 16th falling edge for CPOL = 0).
What is the conversion time and settling behavior of the LTC2450CDC#TRPBF?
The LTC2450CDC#TRPBF has a fixed nominal conversion time of 33.3 ms (29–42 ms max), with single-cycle settling-meaning a valid, calibrated 16-bit result is available after each complete conversion. There is no filter delay or latency; the output corresponds directly to the sampled input, enabling reliable time-division multiplexing of multiple analog sources without additional timing margin.
LTC2450CDC#TRPBF 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#TRPBF FAQ
1.How can I place an order for LTC2450CDC#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2450CDC#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 LTC2450CDC#TRPBF reliable?
The price and inventory of LTC2450CDC#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2450CDC#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2450CDC#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2450CDC#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2450CDC#TRPBF?
LTC2450CDC#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2450CDC#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 LTC2450CDC#TRPBF?
For technical support, including LTC2450CDC#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2450CDC#TRPBF requirements.
6.How does Aetrix verify that LTC2450CDC#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2450CDC#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 LTC2450CDC#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2450CDC#TRPBF?
All LTC2450CDC#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2450CDC#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 LTC2450CDC#TRPBF part is unused and in its original packaging.
Return procedure for LTC2450CDC#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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