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Analog Devices Inc. LTC2450CDC-1#TRPBF
- Part No.:
- LTC2450CDC-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC2450CDC-1#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,943
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Product details
Overview
LTC2450CDC-1#TRPBF 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 in a 2mm × 2mm DFN package.
For engineers reviewing the LTC2450CDC-1#TRPBF datasheet, LTC2450CDC-1#TRPBF pinout, LTC2450CDC-1#TRPBF application, or LTC2450CDC-1#TRPBF equivalent, key selection considerations include rail-to-rail input range (GND to VCC), ultra-low sleep current (<500nA), integrated oscillator eliminating external timing components, SPI interface compatibility, and verified performance across 0°C to 70°C.
Technical Context
The LTC2450CDC-1#TRPBF employs a proprietary delta-sigma modulator architecture with internal oversampling and auto-shutdown logic, enabling true single-conversion settling for multiplexed inputs. Its input sampling scheme reduces average input current to 50nA, allowing direct RC filter interfacing without significant error.
It implements a fixed 16.6ms conversion time, supports both CPOL = 0 and CPOL = 1 SPI modes, and uses an internal 4MHz switching frequency. The device transitions through three deterministic states-CONVERT, SLEEP, and DATA OUTPUT-with CS-controlled entry/exit and SDO-monitored status indication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and full code coverage over full scale. |
| Input Range | GND to VCC - enables direct connection to rail-referenced sensors without level-shifting circuitry. |
| Conversion Rate | Up to 60 sps - supports real-time monitoring of slow-varying physical parameters like temperature or pressure. |
| Supply Current | 350μA active, <500nA sleep - allows battery-powered operation for years in low-duty-cycle sensor nodes. |
| Noise Performance | 0.02LSB RMS - ensures sub-1μV effective resolution at 3V reference (≈46μV LSB). |
| Reference Source | VCC - eliminates need for external voltage reference, reducing BOM count and layout complexity. |
| Interface | 3-wire SPI (CS, SCK, SDO) - compatible with standard microcontroller peripherals and requires no additional protocol logic. |
Pinout & Package
Package: 6-lead (2mm × 2mm) plastic DFN with exposed pad (Pin 7), rated for 0°C to 70°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply and reference voltage input | Must be bypassed with 10μF + 0.1μF capacitors close to pin; directly sets ADC full-scale range and LSB size. |
| VIN (Pin 2) | Analog input | Single-ended, rail-to-rail input accepting 0V to VCC; internal sampling capacitance is 0.35pF. |
| GND (Pin 3) | Analog/digital ground | Low-impedance connection required; shared with exposed pad (Pin 7) to minimize reference path errors. |
| CS (Pin 4) | Active-low chip select | Controls SDO output enable and state transitions; HIGH forces sleep mode, LOW initiates data read or status check. |
| SDO (Pin 5) | Three-state serial data output | Outputs MSB-first 16-bit result during DATA OUTPUT; indicates conversion status (HIGH = in progress, LOW = complete) when CS is LOW and SCK is HIGH. |
| SCK (Pin 6) | Serial clock input | Synchronizes data output; falling edge clocks out each bit; supports idle-high or idle-low polarity (CPOL = 0 or 1). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated oscillator | Eliminates all external timing components - reduces PCB area and design validation effort for timing-critical systems. |
| Proprietary input sampling | Reduces average input current to 50nA - enables use of simple RC filters (e.g., 1kΩ + 0.1μF) with <1LSB error. |
| Single-cycle settling | Enables true multiplexed operation without inter-channel settling delay - simplifies firmware for multi-sensor acquisition. |
| Rail-to-rail input range | Accepts 0V to VCC signals - avoids external op-amp buffers for sensors with output swing near supply rails. |
| Auto shutdown after conversion | Enters <500nA sleep automatically - removes need for software-controlled power gating in low-power firmware. |
Applications
| Environmental Monitoring | Industrial Process Control |
|---|---|
Use Scenario: Measuring ambient temperature, humidity, or gas concentration using resistive or voltage-output sensors in remote IoT nodes. IC Role / Device Role / Timing Role: Primary ADC digitizing low-bandwidth analog sensor outputs with minimal power overhead. Use Value: 25μW average power at 1Hz output rate extends battery life beyond 10 years in coin-cell–powered deployments. | Use Scenario: Monitoring pressure, flow, or liquid level in factory automation systems with PLC-connected analog front-ends. IC Role / Device Role / Timing Role: High-accuracy signal conditioner converting industrial 0–5V or 0–10V sensor outputs into digital values for control loop feedback. Use Value: 0.5mV offset error and 4LSB full-scale error ensure ±0.1% measurement fidelity without calibration in production environments. |
| Direct Temperature Measurements | Embedded ADC Upgrades |
Use Scenario: Digitizing outputs from thermistors, RTDs, or thermocouples (with cold-junction compensation) in medical or test equipment. IC Role / Device Role / Timing Role: Precision analog front-end ADC providing 16-bit resolution for high-fidelity thermal profiling. Use Value: 0.02LSB RMS noise enables detection of sub-0.1°C temperature changes at 3V reference. | Use Scenario: Replacing legacy 12-bit or 14-bit ADCs in existing designs to improve dynamic range without changing PCB layout. IC Role / Device Role / Timing Role: Pin-compatible upgrade path delivering higher resolution and lower power than older discrete ADC solutions. Use Value: Same 6-pin DFN footprint and SPI interface allow drop-in replacement while doubling effective resolution. |
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), 860SPS max, no internal oscillator - requires external clock or master timing. | Better suited for multi-channel, moderate-speed systems with I²C bus availability; lacks rail-to-rail input without PGA configuration. | Select ADS1115IDGSR when channel count >1 and I²C infrastructure exists; avoid if single-channel, SPI-only, or ultra-low-power sleep is mandatory. |
| MCP3421A0T-E/CH | 18-bit resolution, I²C interface, 15SPS max, internal 2.048V reference - fixed reference limits input range flexibility vs. VCC-referenced LTC2450CDC-1#TRPBF. | Ideal for high-precision, low-speed measurements where absolute accuracy outweighs speed; incompatible with rail-to-rail sensor outputs unless buffered. | Choose MCP3421A0T-E/CH for calibrated lab-grade readings; prefer LTC2450CDC-1#TRPBF for cost-sensitive, supply-referenced, or battery-operated field sensors. |
Compared with ADS1115IDGSR and MCP3421A0T-E/CH, the LTC2450CDC-1#TRPBF uniquely combines SPI simplicity, VCC-referenced rail-to-rail input, and sub-500nA sleep current - making it optimal for compact, single-channel, energy-constrained sensing nodes requiring deterministic timing and minimal external components.
Availability
LTC2450CDC-1#TRPBF is available at Aetrix Electronics and suitable for environmental monitoring, industrial process control, and embedded ADC upgrades requiring stable component supply, long-term lifecycle support, and guaranteed 0°C to 70°C performance compliance.
Supply support for LTC2450CDC-1#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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC2450CDC-1#TRPBF belongs to ADI's precision delta-sigma ADC product line, designed specifically for ultra-low-power, space-constrained sensing applications where resolution, simplicity, and supply efficiency are prioritized over multi-channel density or ultra-high speed.
FAQ
What is the operating temperature range for the LTC2450CDC-1#TRPBF?
The LTC2450CDC-1#TRPBF is specified for operation from 0°C to 70°C, as indicated by the "C" grade suffix in its part number. This commercial-grade rating makes it suitable for indoor industrial controls, consumer instrumentation, and non-automotive embedded systems where ambient conditions remain within this envelope. The device's electrical characteristics-including offset error drift (0.02 LSB/°C) and gain error drift-are guaranteed across this full range.
Does the LTC2450CDC-1#TRPBF require an external crystal or oscillator?
No, the LTC2450CDC-1#TRPBF does not require an external crystal or oscillator. It integrates a proprietary internal oscillator that operates at approximately 4MHz and drives the delta-sigma modulator core. This eliminates all external timing components, reduces bill-of-materials cost, and improves system reliability by removing potential failure points associated with external resonators or clock distribution networks.
How does the LTC2450CDC-1#TRPBF achieve rail-to-rail input capability?
The LTC2450CDC-1#TRPBF achieves rail-to-rail input capability by designing its input stage to accept analog voltages from GND to VCC without clipping or distortion. Its internal architecture ensures that an input of 0V produces a digital output code of 0x0000, and an input of VCC yields 0xFFFF-provided offset and full-scale errors are within specification. This eliminates the need for external level-shifting circuitry when interfacing with sensors whose output spans the supply rails.
Can the LTC2450CDC-1#TRPBF be used in 2-wire SPI mode?
Yes, the LTC2450CDC-1#TRPBF supports 2-wire operation by hardwiring CS to GND. In this configuration, SDO status monitoring and sleep mode are disabled, and conversion triggering relies solely on SCK edges. Idle-high (CPOL = 1) mode is recommended for 2-wire use because SDO transitions from HIGH (conversion in progress) to LOW (complete) provide reliable status indication without CS control.
What is the typical power consumption of the LTC2450CDC-1#TRPBF at 1Hz output rate?
At a 1Hz output rate and 2.7V supply, the LTC2450CDC-1#TRPBF consumes an average of less than 25μW. This is achieved by drawing 350μA during its ~16.6ms conversion phase and dropping below 500nA during the remaining 983ms of each second in automatic sleep mode. This ultra-low average power enables multi-year operation from small batteries in wireless sensor nodes.
LTC2450CDC-1#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-1#TRPBF FAQ
1.How can I place an order for LTC2450CDC-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2450CDC-1#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-1#TRPBF reliable?
The price and inventory of LTC2450CDC-1#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-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2450CDC-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2450CDC-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2450CDC-1#TRPBF?
LTC2450CDC-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2450CDC-1#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-1#TRPBF?
For technical support, including LTC2450CDC-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2450CDC-1#TRPBF requirements.
6.How does Aetrix verify that LTC2450CDC-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2450CDC-1#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-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2450CDC-1#TRPBF?
All LTC2450CDC-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2450CDC-1#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-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC2450CDC-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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