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Analog Devices Inc. LTC2450IDC#TRPBF
- Part No.:
- LTC2450IDC#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC2450IDC#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,469
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Product details
Overview
LTC2450IDC#TRPBF from Analog Devices (acquired 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#TRPBF datasheet, LTC2450IDC#TRPBF pinout, LTC2450IDC#TRPBF application, or LTC2450IDC#TRPBF equivalent, key selection criteria include guaranteed no-missing-codes resolution, internal reference tied to VCC, single-cycle settling for multiplexed inputs, and ultra-low 50 nA average input sampling current enabling direct RC filter interfacing without buffering.
Technical Context
The LTC2450IDC#TRPBF employs a delta-sigma modulator core with continuous internal offset and full-scale calibration per conversion, ensuring stability over temperature (–40°C to +85°C) and time without user intervention. Its proprietary input sampling scheme reduces average input current to 50 nA, eliminating need for external op-amp drivers in many sensor applications.
It operates exclusively from a single 2.7 V to 5.5 V supply, using VCC as both power source and reference voltage - resulting in fixed 1 LSB = VCC / 65536. Conversion time is fixed at 33.3 ms (max 42 ms), enabling deterministic timing for microcontroller polling or status monitoring via SDO pin.
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, critical for precision measurement systems. |
| RMS Noise | 0.02 LSB - translates to ~1.4 µVRMS at 3 V supply, enabling sub-millivolt signal resolution without oversampling. |
| Conversion Rate | 30 sps - fixed 33.3 ms cycle time supports deterministic firmware scheduling and eliminates filter settling delays. |
| Supply Current | 350 µA active, <200 nA sleep - enables battery-powered operation for >1 year on a CR2032 when sampling once per second. |
| Input Sampling Current | 50 nA average - allows direct connection of 1 kΩ/0.1 µF RC anti-aliasing filter with <1 LSB error, removing need for buffer amplifier. |
| Reference | VCC (2.7 V to 5.5 V) - eliminates external reference component; LSB size scales with supply, preserving 16-bit effective resolution. |
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 | Must be bypassed with 10 µF + 0.1 µF capacitors close to pin; sets full-scale range and LSB value (VCC/65536). |
| VIN (Pin 2) | Analog input | Single-ended, rail-to-rail (0 V to VCC); accepts true DC signals without level-shifting or biasing networks. |
| GND (Pin 3) | Analog and digital ground | Low-impedance connection to system ground plane required; shares reference return path with VCC. |
| 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) | Three-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 | Edge-triggered (rising or falling depending on CPOL); synchronizes bit transfer; idle-high (CPOL=1) or idle-low (CPOL=0) supported. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated oscillator | Eliminates all external timing components - reduces BOM count and layout sensitivity while guaranteeing consistent conversion timing. |
| Single-cycle settling | Enables true multiplexed operation: each channel conversion completes fully before next sample begins, avoiding inter-channel crosstalk or settling errors. |
| Auto-sleep mode | Enters <200 nA quiescent state after conversion completion; wakes instantly on CS or SCK activity - ideal for intermittent sensing. |
| Continuous calibration | Per-conversion offset and full-scale correction runs transparently - maintains accuracy across –40°C to +85°C without calibration registers or host intervention. |
| Ultra-low input sampling current | 50 nA average draw allows direct RC filtering (e.g., 1 kΩ/0.1 µF) with <1 LSB error - removes need for power-hungry op-amp buffers in sensor front-ends. |
Applications
| Environmental Sensor Node | Industrial Process Monitoring |
|---|---|
Use Scenario: Battery-powered remote air quality sensor measuring temperature, humidity, and CO₂ via analog outputs. IC Role / Device Role / Timing Role: Primary ADC digitizing multiple sensor outputs with rail-to-rail input range and deterministic 33.3 ms conversion cycle. Use Value: 50 nA input current enables direct RC filtering; 350 µA active / <200 nA sleep current extends CR2032 life beyond 2 years at 1 Hz sampling. |
Use Scenario: PLC analog input module acquiring 4–20 mA loop signals and thermocouple outputs in factory automation. IC Role / Device Role / Timing Role: High-accuracy, low-drift ADC providing 16-bit resolution with no missing codes for certified process control compliance. Use Value: ±2 LSB INL and continuous internal calibration ensure long-term stability across –40°C to +85°C ambient without recalibration. |
| Embedded System Upgrade | Direct Temperature Measurement |
Use Scenario: Retrofitting legacy 12-bit microcontroller-based equipment with higher-resolution data acquisition capability. IC Role / Device Role / Timing Role: Drop-in ADC replacement adding 4 extra bits of resolution while maintaining same SPI interface and supply voltage range. Use Value: Pin-compatible with existing layouts (2 mm × 2 mm DFN); requires only firmware update to handle 16-bit serial output - no hardware redesign. |
Use Scenario: Thermistor-based temperature monitor in medical wearable device requiring millidegree accuracy. IC Role / Device Role / Timing Role: Precision ADC converting ratiometric thermistor divider output with VCC-referenced measurement eliminating reference drift. Use Value: 0.02 LSB RMS noise (~1.4 µVRMS) resolves <0.05°C changes in 10 kΩ NTC at 25°C with standard bias network. |
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. | Better suited for multi-channel, variable-gain systems; lacks auto-sleep and single-cycle settling for multiplexed use. | Select ADS1115IRUGT when multi-input scanning or PGA flexibility is needed; LTC2450IDC#TRPBF preferred for lowest power, deterministic timing, and minimal external components. |
| MCP3421A0T-E/CH | 18-bit resolution, I²C interface, internal 2.048 V reference, 15 sps (18-bit) or 240 sps (12-bit); no rail-to-rail input - input range limited to ±2.048 V. | Higher resolution but narrower input range and slower effective rate at full resolution; requires level-shifting for 0–VCC sensors. | Choose MCP3421A0T-E/CH for ultra-high precision DC measurements with stable reference; LTC2450IDC#TRPBF better for wide-input-range, low-power, single-supply sensor interfaces. |
Compared with ADS1115IRUGT and MCP3421A0T-E/CH, the LTC2450IDC#TRPBF uniquely combines rail-to-rail input, VCC-referenced operation, integrated oscillator, and 50 nA input current - making it optimal for space-constrained, battery-powered, single-channel sensor nodes where simplicity and power efficiency are primary.
Availability
LTC2450IDC#TRPBF is available at Aetrix Electronics and suitable for industrial process control, environmental monitoring, and embedded ADC upgrades requiring stable component supply, extended temperature support (–40°C to +85°C), and long-term production continuity.
Supply support for LTC2450IDC#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 acquired Linear Technology in 2017 and maintains its high-precision analog product lines, including delta-sigma ADCs, with focus on performance, reliability, and design-in support for industrial and instrumentation markets.
The LTC2450IDC#TRPBF belongs to Linear's ultra-low-power, easy-to-use precision ADC family designed specifically for space- and power-constrained sensor interfaces where minimal external components and guaranteed no-missing-codes operation are essential.
FAQ
What is the operating temperature range of the LTC2450IDC#TRPBF?
The LTC2450IDC#TRPBF is rated for –40°C to +85°C (Industrial grade), as confirmed by its part number suffix "I" and Absolute Maximum Ratings table. This range is validated across all key specifications including INL, offset error, and supply current - ensuring reliable operation in harsh environments such as factory floors or outdoor sensor enclosures. The LTC2450IDC#TRPBF maintains its 2 LSB INL and 350 µA supply current within this full range.
Does the LTC2450IDC#TRPBF require an external crystal or oscillator?
No, the LTC2450IDC#TRPBF includes a fully integrated oscillator that requires no external components - a key differentiator confirmed in the Features list and Functional Block Diagram. This oscillator drives the delta-sigma modulator and defines the fixed 33.3 ms conversion time. Using the internal oscillator eliminates BOM cost, board space, and layout sensitivity associated with external timing elements, and is explicitly stated as "no external components required" in the datasheet.
Can the LTC2450IDC#TRPBF measure signals from 0 V to VCC without external level-shifting?
Yes, the LTC2450IDC#TRPBF supports true rail-to-rail single-ended input from 0 V to VCC, as specified in the Input Voltage Range section and confirmed by the "GND to VCC Single-Ended Input Range" feature bullet. When VCC = 3.3 V, the input range is exactly 0 V to 3.3 V; at VCC = 5 V, it is 0 V to 5 V. This eliminates need for biasing resistors or op-amp level shifters when interfacing with most sensors and transducers, and is guaranteed across the full –40°C to +85°C range.
How does the LTC2450IDC#TRPBF achieve such low input sampling current?
The LTC2450IDC#TRPBF uses a proprietary input sampling architecture that reduces average input current to 50 nA - documented in the Electrical Characteristics table under "ICONV" and explained in the Applications Information section. This is achieved through optimized charge redistribution and duty-cycled sampling, enabling direct RC filter interfacing (e.g., 1 kΩ/0.1 µF) with <1 LSB error. Unlike conventional delta-sigma ADCs, this architecture avoids continuous input loading, making the LTC2450IDC#TRPBF uniquely suitable for high-impedance sensor sources.
Is the LTC2450IDC#TRPBF pin-compatible with other members of the LTC245x family?
Yes, the LTC2450IDC#TRPBF shares the identical 6-lead 2 mm × 2 mm DFN package and pinout with LTC2451 and LTC2452, as verified in their respective datasheet pin configuration diagrams and ordering tables. All three devices use VCC, VIN, GND, CS, SDO, and SCK on the same pins with identical functions - allowing hardware reuse across variants differing only in interface (SPI vs I²C) or input type (single-ended vs differential). This compatibility is explicitly maintained across Linear's documentation.
LTC2450IDC#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:
- -40°C ~ 85°C
- Supplier Device Package:
- 6-DFN (2x2)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2450IDC#TRPBF FAQ
1.How can I place an order for LTC2450IDC#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2450IDC#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#TRPBF reliable?
The price and inventory of LTC2450IDC#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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2450IDC#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2450IDC#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2450IDC#TRPBF?
LTC2450IDC#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2450IDC#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#TRPBF?
For technical support, including LTC2450IDC#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2450IDC#TRPBF requirements.
6.How does Aetrix verify that LTC2450IDC#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2450IDC#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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2450IDC#TRPBF?
All LTC2450IDC#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2450IDC#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#TRPBF part is unused and in its original packaging.
Return procedure for LTC2450IDC#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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