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Analog Devices Inc. LTC2450IDC-1#TRPBF
- Part No.:
- LTC2450IDC-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC2450IDC-1#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,400
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Product details
Overview
LTC2450IDC-1#TRPBF from Analog Devices (formerly Linear Technology) is a low-power, single-ended 16-bit delta-sigma ADC designed 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, features single-cycle settling time, and consumes less than 25μW at 1Hz output rate on 2.7V - ideal for battery-powered environmental or system monitoring nodes.
For engineers reviewing the LTC2450IDC-1#TRPBF datasheet, LTC2450IDC-1#TRPBF pinout, LTC2450IDC-1#TRPBF application, or LTC2450IDC-1#TRPBF equivalent, key selection criteria include rail-to-rail input range (GND to VCC), ultra-low 50nA average input sampling current, integrated oscillator eliminating external timing components, SPI-compatible 3-wire interface, and −40°C to +85°C industrial temperature grade.
Technical Context
The LTC2450IDC-1#TRPBF employs a proprietary delta-sigma modulator with internal oversampling and auto-zeroing, achieving 0.02LSB RMS noise and guaranteed 16-bit no-missing-codes performance. Its conversion cycle comprises three deterministic states - CONVERT (~16.6ms), SLEEP (<500nA), and DATA OUTPUT - synchronized via CS/SCK/SDO signals without latency or filter settling delay.
It integrates an internal oscillator and uses VCC as both supply and reference, enabling direct rail-to-rail analog input (VIN = 0V to VCC) with 0.5mV offset error and 4LSB full-scale error. The device supports CPOL = 0 or 1 SPI modes, allows conversion status monitoring via SDO level during sleep, and implements an Easy Drive™ input sampling scheme reducing average input current by orders of magnitude versus conventional delta-sigma architectures.
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 | GND to VCC - enables direct connection to unbuffered sensors without level-shifting circuitry. |
| Sampling Current | 50nA average - permits use of simple RC filters (e.g., 1kΩ + 0.1μF) with <1LSB error, eliminating need for op-amp buffers. |
| Conversion Rate | Up to 60 sps - fixed 16.6ms conversion time enables precise timing control in multiplexed systems. |
| Supply Current | 350μA active, <500nA sleep - supports ultra-low-power wake-up-and-measure operation in energy-harvesting designs. |
| Noise Performance | 0.02LSB RMS - ensures high effective resolution even with noisy supply or layout conditions. |
| Reference | VCC (2.7V–5.5V) - eliminates external reference IC, simplifies BOM, and scales LSB size with supply voltage. |
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.
| 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 full-scale range and LSB size. |
| VIN (Pin 2) | Analog input | Rail-to-rail single-ended input; draws only 50nA avg. current, enabling direct RC filtering without buffer. |
| GND (Pin 3) | Analog/digital ground | Low-impedance connection required to minimize reference error from supply current through PCB traces. |
| CS (Pin 4) | Active-low chip select | Controls SDO output enable/disable; HIGH places SDO in Hi-Z; LOW initiates data read or status monitoring. |
| 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 LOW and SCK is HIGH. |
| SCK (Pin 6) | Serial clock input | Drives data shift-out timing; supports idle-high (CPOL=1) or idle-low (CPOL=0); edge rate impacts noise immunity during conversion. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated oscillator | Eliminates all external timing components - reduces component count, board area, and startup complexity. |
| Easy Drive™ input sampling | Reduces average input current to 50nA - enables direct sensor interfacing with passive RC anti-aliasing filters. |
| Single-cycle settling | Delivers valid conversion result after each acquisition - removes need for channel settling delays in multiplexed systems. |
| Auto sleep mode | Enters <500nA sleep automatically post-conversion - extends battery life in intermittent measurement applications. |
| Fixed conversion time | 16.6ms nominal duration - allows deterministic firmware timing without polling or interrupts for completion detection. |
Applications
| Environmental Monitoring | Industrial Process Control |
|---|---|
Use Scenario: Measuring temperature, humidity, or gas concentration in remote wireless sensor nodes. IC Role / Device Role / Timing Role: Primary analog front-end ADC converting sensor outputs to digital for MCU processing and RF transmission. Use Value: Ultra-low 25μW average power at 1Hz enables multi-year battery life; rail-to-rail input accommodates diverse sensor output ranges without signal conditioning. |
Use Scenario: Monitoring pressure, flow, or level in PLC-based factory automation systems. IC Role / Device Role / Timing Role: High-accuracy, low-drift ADC for analog input modules requiring stable 16-bit resolution over industrial temperature range. Use Value: −40°C to +85°C rating ensures reliability in harsh environments; 0.5mV offset error and 4LSB full-scale error support precision calibration routines. |
| Embedded ADC Upgrades | System Monitoring |
Use Scenario: Replacing legacy 12-bit SAR ADCs in existing microcontroller-based designs to improve resolution without layout changes. IC Role / Device Role / Timing Role: Drop-in compatible ADC upgrade with identical 6-pin DFN footprint and SPI interface timing. Use Value: Same pinout and 3-wire protocol simplify migration; integrated oscillator removes need for external crystal or clock source. |
Use Scenario: Monitoring supply voltages, battery levels, or thermal sensors on server motherboards or telecom equipment. IC Role / Device Role / Timing Role: Low-power auxiliary ADC dedicated to health monitoring functions, operating independently of main system clock. Use Value: Sleep current <500nA minimizes impact on system standby power; VCC-referenced operation ensures accurate relative measurements across varying rail voltages. |
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 |
|---|---|---|---|
| ADS1115IRUGT | 4-channel, I²C interface, programmable gain amplifier (PGA), 860SPS max, no internal oscillator - requires external clock or master timing. | Supports differential inputs and multiple channels; better suited for multi-sensor systems with I²C bus constraints. | Choose ADS1115IRUGT when multi-channel acquisition or differential measurement is required; avoid if SPI-only interface or lowest possible power is mandatory. |
| MCP3424-E/ST | 4-channel, I²C interface, 18-bit resolution, 3.75SPS–15SPS, internal reference (2.048V), no VCC-referenced mode - fixed reference limits input range flexibility. | Higher resolution but slower; internal reference improves absolute accuracy but prevents rail-to-rail scaling with supply. | Choose MCP3424-E/ST when absolute voltage accuracy is critical and speed is secondary; avoid when input range must track VCC or power budget is sub-30μW. |
Compared with ADS1115IRUGT and MCP3424-E/ST, the LTC2450IDC-1#TRPBF uniquely combines VCC-referenced rail-to-rail input, integrated oscillator, 50nA input current, and −40°C to +85°C operation in a 2mm × 2mm DFN - making it optimal for compact, low-power, single-input sensing where simplicity and supply tracking outweigh multi-channel or higher-resolution needs.
Availability
LTC2450IDC-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 −40°C to +85°C performance.
Supply support for LTC2450IDC-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 semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2450IDC-1#TRPBF belongs to ADI's precision delta-sigma ADC product line, engineered specifically for ultra-low-power, space-constrained sensing applications where ease of use, minimal external components, and guaranteed 16-bit performance are essential design requirements.
FAQ
What is the operating temperature range of the LTC2450IDC-1#TRPBF?
The LTC2450IDC-1#TRPBF is rated for −40°C to +85°C, meeting industrial-grade requirements. This specification is confirmed in the Absolute Maximum Ratings table and Electrical Characteristics section of the official datasheet, and applies across all performance parameters including offset error, gain error, and noise. The "I" grade designation in the part number explicitly denotes this extended temperature range.
Does the LTC2450IDC-1#TRPBF require an external crystal or clock source?
No, the LTC2450IDC-1#TRPBF includes a fully integrated oscillator that requires no external components. This is explicitly stated in the FEATURES list and verified in the PIN FUNCTIONS section, which notes "Internal Oscillator-No External Components Required." The oscillator drives the delta-sigma modulator and timing logic internally, simplifying design and reducing BOM cost.
How does the LTC2450IDC-1#TRPBF achieve rail-to-rail input operation?
The LTC2450IDC-1#TRPBF achieves true rail-to-rail input (GND to VCC) by using VCC as its reference voltage and implementing a proprietary input sampling architecture. As documented in the DESCRIPTION and APPLICATIONS INFORMATION sections, the converter outputs "all zero" at GND and "all one" at VCC, with under-range and over-range clamping behavior confirmed in the Input Voltage Range subsection.
What is the typical power consumption of the LTC2450IDC-1#TRPBF at 1Hz output rate?
At 1Hz output rate and 2.7V supply, the LTC2450IDC-1#TRPBF consumes an average of less than 25μW - calculated from 350μA active current during 16.6ms conversion and <500nA sleep current for the remaining 983.4ms per second. This value is directly specified in the DESCRIPTION paragraph and validated by the Average Supply Power vs Temperature graph (Figure G10) in the datasheet.
Can the LTC2450IDC-1#TRPBF be used in 2-wire SPI mode?
Yes, the LTC2450IDC-1#TRPBF supports 2-wire operation by hardwiring CS to GND, as detailed in Figures 12 and 13 and the 2-Wire Operation subsection. However, this disables sleep mode and abort capability. The device remains functional with SCK and SDO only, supporting both CPOL = 0 and CPOL = 1 configurations, though CPOL = 1 is recommended for status monitoring in this mode.
LTC2450IDC-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):
- 60
- 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 6-DFN (2x2)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2450IDC-1#TRPBF FAQ
1.How can I place an order for LTC2450IDC-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2450IDC-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 LTC2450IDC-1#TRPBF reliable?
The price and inventory of LTC2450IDC-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 LTC2450IDC-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2450IDC-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2450IDC-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2450IDC-1#TRPBF?
LTC2450IDC-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2450IDC-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 LTC2450IDC-1#TRPBF?
For technical support, including LTC2450IDC-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2450IDC-1#TRPBF requirements.
6.How does Aetrix verify that LTC2450IDC-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2450IDC-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 LTC2450IDC-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2450IDC-1#TRPBF?
All LTC2450IDC-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2450IDC-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 LTC2450IDC-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC2450IDC-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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