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Analog Devices Inc. LTC2450IDC#TRMPBF
- Part No.:
- LTC2450IDC#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC2450IDC#TRMPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,462
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Product details
Overview
LTC2450IDC#TRMPBF 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 throughput, and auto-sleep mode drawing <200 nA - used in embedded environmental monitoring and low-power sensor interfaces.
For engineers reviewing the LTC2450IDC#TRMPBF datasheet, LTC2450IDC#TRMPBF pinout, LTC2450IDC#TRMPBF application, or LTC2450IDC#TRMPBF equivalent, key selection criteria include guaranteed no-missing-codes resolution, internal reference operation from 2.7 V to 5.5 V supply, single-cycle settling for multiplexed inputs, ultra-low input sampling current (50 nA), and DFN-6 (2 mm × 2 mm) package compatibility with space-constrained PCB layouts.
Technical Context
The LTC2450IDC#TRMPBF employs a delta-sigma modulator core with continuous internal offset and full-scale calibration per conversion, ensuring accuracy over temperature (–40°C to +85°C) without user intervention. Its proprietary input sampling scheme reduces average input current by orders of magnitude versus conventional architectures.
It operates in three deterministic states - CONVERT (~33.3 ms), SLEEP (<200 nA), and DATA OUTPUT - controlled via a 3-wire SPI interface (CS, SCK, SDO). The internal oscillator eliminates external timing components, and the VCC pin serves as both supply and reference voltage, enabling true rail-to-rail input range (GND to VCC) with LSB scaling tied directly to supply voltage.
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 at 3 V or 5 V supply. |
| RMS Noise | 0.02 LSB - translates to ~1.4 µVRMS at 3 V reference, supporting high-fidelity low-level signal digitization. |
| Conversion Rate | 30 sps - fixed 33.3 ms conversion time enables predictable timing for multiplexed sensor polling. |
| Supply Current | 350 µA active, <200 nA sleep - enables battery-powered operation with sub-50 µW average power at 1 Hz sampling (2.7 V). |
| Input Range | GND to VCC, single-ended - eliminates need for external level-shifting or differential amplifiers in direct sensor interfacing. |
| Reference | Internal, tied to VCC - removes external reference IC, simplifies BOM, and scales LSB with supply (e.g., 45.8 µV/LSB at 3 V). |
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 | Must be bypassed with 10 µF || 0.1 µF capacitors close to pin; sets ADC full-scale range and LSB size. |
| VIN (Pin 2) | Analog input | Single-ended, rail-to-rail (0 V to VCC); accepts direct connection to resistive sensors or transducer outputs. |
| GND (Pin 3) | Analog/digital ground reference | Low-impedance connection to PCB ground plane required to maintain reference stability and noise immunity. |
| CS (Pin 4) | Active-low chip select | Controls SDO output enable (LOW) and initiates DATA OUTPUT state; HIGH forces SDO into high-Z and triggers new conversion. |
| SDO (Pin 5) | 3-state serial data output | Outputs MSB-first 16-bit result during DATA OUTPUT; also 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 CPOL = 0 or 1; falling edge clocks data out on SDO; rising edge can latch data externally. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated oscillator | Eliminates external crystal/capacitor - reduces component count and board area while guaranteeing stable conversion timing. |
| Single-cycle settling | Enables reliable multiplexed operation without inter-channel settling delay or software wait states. |
| Auto-sleep mode | Reduces supply current to <200 nA between conversions - critical for multi-year battery life in remote sensing nodes. |
| Proprietary input sampling | 50 nA average input current allows direct RC filtering (e.g., 1 kΩ + 0.1 µF) with <1 LSB error - avoids buffer op-amps. |
| Continuous calibration | Per-conversion offset and full-scale correction ensures long-term accuracy without user-triggered recalibration routines. |
Applications
| Environmental Sensor Node | Industrial Temperature Monitoring |
|---|---|
|
Use Scenario: Battery-powered wireless node measuring ambient temperature, humidity, and air quality using resistive and thermistor-based sensors. IC Role / Device Role / Timing Role: Primary ADC digitizing multiple low-bandwidth analog sensor outputs with minimal power overhead and no external timing components. Use Value: 350 µA active current and <200 nA sleep current enable >5-year operation on a CR2032; rail-to-rail input accommodates 0–3.3 V sensor outputs directly. |
Use Scenario: DIN-rail mounted PLC module acquiring temperature from PT100/1000 RTDs and thermocouples via conditioning circuits. IC Role / Device Role / Timing Role: High-accuracy, low-drift ADC front-end with internal calibration maintaining ±2 LSB INL across –40°C to +85°C industrial temperature range. Use Value: Continuous offset/gain correction ensures measurement stability over thermal cycling; 0.02 LSB RMS noise supports 16-bit effective resolution in noisy factory environments. |
| Embedded System Upgrade | Portable Instrumentation |
|
Use Scenario: Retrofitting legacy 12-bit microcontroller-based data loggers with higher-resolution analog capture capability. IC Role / Device Role / Timing Role: Drop-in ADC upgrade providing 16-bit resolution and SPI interface compatible with existing MCU firmware and PCB layout. Use Value: Same 6-pin DFN footprint and 3-wire SPI protocol simplify hardware integration; no changes to decoupling or routing needed beyond VCC/GND optimization. |
Use Scenario: Handheld multimeter or portable gas analyzer requiring precision DC measurements with ultra-low standby power. IC Role / Device Role / Timing Role: Core measurement engine delivering calibrated 16-bit results with <1.4 µVRMS noise and automatic sleep between readings. Use Value: Internal VCC-referenced architecture eliminates external reference drift; 2 mm × 2 mm DFN enables compact handheld form factor without sacrificing accuracy. |
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), 860 sps max, no internal oscillator - requires external clock or MCU timing. | Supports differential inputs and PGA gain up to 16×; better for small-signal or multi-channel systems but lacks auto-sleep and rail-to-rail VIN. | Select ADS1115IRUGT when multi-channel acquisition or programmable gain is required; avoid if single-ended rail-to-rail input or ultra-low sleep current (<200 nA) is mandatory. |
| MCP3424-E/ST | 4-channel, I²C interface, 18-bit resolution, 3.75 sps (18-bit) to 15 sps (16-bit), internal reference only (2.048 V), no VCC-referenced operation. | Higher resolution but fixed 2.048 V reference limits input range to 0–2.048 V unless external scaling; no auto-sleep mode - minimum current 1 µA. | Select MCP3424-E/ST when absolute 18-bit accuracy is prioritized over supply-voltage scalability and ultra-low power; not suitable for direct VCC-referenced designs. |
Compared with LTC2450IDC#TRMPBF, ADS1115IRUGT offers channel flexibility and PGA but sacrifices rail-to-rail input and deep-sleep capability, while MCP3424-E/ST provides higher resolution at the cost of fixed reference, higher sleep current, and no VCC-scaling - making LTC2450IDC#TRMPBF optimal for ultra-compact, single-input, battery-critical applications demanding simplicity and supply-voltage adaptability.
Availability
LTC2450IDC#TRMPBF is available at Aetrix Electronics and suitable for environmental monitoring, industrial process control, and embedded ADC upgrades requiring stable component supply, extended temperature support (–40°C to +85°C), and long-lifecycle availability.
Supply support for LTC2450IDC#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 acquired Linear Technology in 2017 and maintains its precision analog product lines, including high-performance ADCs, with global manufacturing, testing, and reliability validation infrastructure.
The LTC2450IDC#TRMPBF belongs to Linear's ultra-low-power, easy-to-use delta-sigma ADC family designed specifically for space- and power-constrained sensor interfaces where minimal external components, guaranteed no-missing-codes performance, and robust operation across industrial temperatures are essential.
FAQ
What is the operating temperature range of the LTC2450IDC#TRMPBF?
The LTC2450IDC#TRMPBF is rated for –40°C to +85°C (industrial grade), as confirmed by its "I" suffix and ordering information in the datasheet. This range applies to all electrical specifications including INL (2 LSB), offset error (2 LSB), and supply current (350 µA typical), ensuring reliable performance in harsh environments without derating.
Does the LTC2450IDC#TRMPBF require an external reference voltage?
No, the LTC2450IDC#TRMPBF uses its VCC supply pin as the reference voltage - eliminating the need for external reference ICs or precision resistors. This internal referencing supports rail-to-rail input (0 V to VCC) and scales LSB size with supply voltage (e.g., 45.8 µV/LSB at 3 V), simplifying design and reducing BOM cost.
How does the LTC2450IDC#TRMPBF achieve ultra-low input sampling current?
The LTC2450IDC#TRMPBF uses a proprietary input sampling architecture that reduces average input current to 50 nA - several orders of magnitude lower than conventional delta-sigma ADCs. This enables direct RC filtering (e.g., 1 kΩ + 0.1 µF) with <1 LSB error, avoiding buffer amplifiers and associated power/complexity.
Can the LTC2450IDC#TRMPBF operate with a 2.7 V supply?
Yes, the LTC2450IDC#TRMPBF is fully specified from 2.7 V to 5.5 V. At 2.7 V, it maintains 16-bit resolution, 2 LSB INL, and 350 µA supply current, with LSB size scaling to ~41.3 µV. Its internal oscillator and SPI interface remain functional across this entire range, supporting low-voltage battery operation.
What is the conversion time and settling behavior of the LTC2450IDC#TRMPBF?
The LTC2450IDC#TRMPBF has a fixed conversion time of 33.3 ms (typical), with 29–42 ms min/max across temperature. It achieves single-cycle settling - meaning each conversion result is fully settled and valid after one cycle, with no additional filter delay or latency - enabling deterministic timing for multiplexed sensor reads without software wait loops.
LTC2450IDC#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:
- -40°C ~ 85°C
- Supplier Device Package:
- 6-DFN (2x2)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2450IDC#TRMPBF FAQ
1.How can I place an order for LTC2450IDC#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2450IDC#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 LTC2450IDC#TRMPBF reliable?
The price and inventory of LTC2450IDC#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2450IDC#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2450IDC#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2450IDC#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2450IDC#TRMPBF?
LTC2450IDC#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2450IDC#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 LTC2450IDC#TRMPBF?
For technical support, including LTC2450IDC#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2450IDC#TRMPBF requirements.
6.How does Aetrix verify that LTC2450IDC#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2450IDC#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 LTC2450IDC#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2450IDC#TRMPBF?
All LTC2450IDC#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2450IDC#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 LTC2450IDC#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2450IDC#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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