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Analog Devices Inc. LTC2451CTS8#TRPBF
- Part No.:
- LTC2451CTS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2451CTS8#TRPBF.pdf
- Description:
- IC ADC 16BIT SIG-DELTA TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,708
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Product details
Overview
LTC2451CTS8#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit delta-sigma analog-to-digital converter with single-ended input, I²C interface, and internal oscillator. It operates from 2.7V to 5.5V, delivers 30/60 conversions per second, achieves 0.02 LSB RMS noise and 2 LSB INL, and is used in embedded system monitoring and environmental sensing where ultra-low input current (50 nA avg) and single-cycle settling are critical.
For engineers reviewing the LTC2451CTS8#TRPBF datasheet, LTC2451CTS8#TRPBF pinout, LTC2451CTS8#TRPBF application, or LTC2451CTS8#TRPBF equivalent, key selection considerations include its TSOT-23-8 package, 30Hz/60Hz programmable conversion rate, GND-to-VCC input range with external REF±, sleep current <0.2 µA, and I²C timing compliance up to 400 kHz.
Technical Context
The LTC2451CTS8#TRPBF implements a proprietary delta-sigma modulator with integrated oscillator and single-cycle settling-enabling true multiplexed ADC operation without latency or filter delay. Its input sampling architecture draws only 50 nA average current, eliminating need for buffer amplifiers in many sensor interfaces.
It uses a hardwired I²C slave address (0010100), supports standard/fast-mode timing (≤400 kHz SCL), and performs continuous internal offset calibration in 30Hz mode-ensuring stable accuracy across temperature without user intervention or external recalibration cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes-guarantees monotonic transfer function for precision measurement systems. |
| INL | 2 LSB max-limits end-point linearity error to ±0.003% of full scale at 16-bit resolution. |
| RMS Noise | 0.02 LSB-enables 19.2-bit effective resolution (ENOB ≈ 15.2) in 30Hz mode for low-drift DC measurements. |
| Conversion Rate | Programmable 30 or 60 sps-selectable via I²C write byte; 30Hz mode enables continuous offset calibration. |
| Supply Current | 400 µA active, <0.2 µA sleep-supports battery-powered nodes with sub-50 µW average power at 1 Hz read rate. |
| Input Range | GND to VCC (with external REF±)-allows direct connection to unbuffered resistive sensors or voltage dividers. |
| I²C Interface | Standard/fast-mode (≤400 kHz), 7-bit address 0x24-compatible with most microcontrollers without level-shifting. |
Pinout & Package
Package: 8-lead TSOT-23 (3 mm × 1.75 mm), RoHS-compliant, exposed pad soldered to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1, 5) | Ground reference | Low-impedance return path for analog/digital circuits; exposed pad (Pin 9) must be soldered to PCB ground plane. |
| REF– (Pin 2) | Negative reference input | Differential reference terminal; sets lower bound of input range (VIN ≥ VREF–); requires VREF+ – VREF– ≥ 2.5 V. |
| REF+ (Pin 3) | Positive reference input | Differential reference terminal; sets upper bound of input range (VIN ≤ VREF+); can be tied to VCC for simplicity. |
| VCC | Positive supply | Single 2.7–5.5 V supply; requires 0.1 µF + 10 µF ceramic decoupling directly at pins. |
| IN (Pin 6) | Analog input | Single-ended input node; accepts voltage from VREF– to VREF+; average sampling current = 50 nA. |
| SCL (Pin 7) | I²C clock input | Slave-only interface; accepts external clock up to 400 kHz; no internal clock generation on this pin. |
| SDA (Pin 8) | I²C bidirectional data | Open-drain output requiring external 1.7 kΩ pull-up to VCC; transmits 16-bit MSB-first conversion result. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input sampling current | 50 nA average-enables direct RC filtering (e.g., 1 kΩ + 0.1 µF) with <1 LSB error, eliminating op-amp buffers. |
| Single-cycle settling time | One conversion completes before next sample-eliminates dead time and enables true time-multiplexed multi-channel acquisition. |
| Internal oscillator | No external crystal or RC network required-reduces BOM count and board area in space-constrained designs. |
| Auto-sleep mode | Enters <0.2 µA sleep after conversion-lowers average power to <50 µW at 1 Hz read rate from 2.7 V supply. |
| Continuous offset calibration | Active in 30Hz mode only-maintains <0.5 mV offset drift over –40°C to +85°C without interrupting conversion flow. |
Applications
| System Monitoring | Environmental Monitoring |
|---|---|
Use Scenario: Real-time voltage/current/temperature tracking in industrial PLCs and edge gateways. IC Role / Device Role / Timing Role: Primary ADC for analog sensor front-ends; provides calibrated 16-bit readings every 33 ms (30Hz mode) with no software calibration overhead. Use Value: Eliminates need for external reference ICs or trimming components due to integrated offset calibration and wide VREF range. | Use Scenario: Battery-powered air quality or soil moisture nodes deployed in remote locations. IC Role / Device Role / Timing Role: Low-power sensing hub ADC; samples thermistors or electrochemical gas sensors at 1 Hz with <50 µW average consumption. Use Value: 50 nA input current allows direct connection to high-impedance sensors without loading error or buffer stage. |
| Direct Temperature Measurements | Instrumentation |
Use Scenario: Precision thermistor-based temperature logging in medical devices and HVAC controls. IC Role / Device Role / Timing Role: High-accuracy ratiometric ADC; uses same VCC as sensor excitation source to reject supply variation. Use Value: GND-to-VCC input range and 2 LSB INL enable ±0.1°C resolution over 0–100°C with 10 kΩ NTC. | Use Scenario: Portable multimeters and handheld data loggers requiring compact, self-contained ADC subsystems. IC Role / Device Role / Timing Role: Standalone measurement engine; outputs ready-to-use 16-bit values over I²C with no configuration registers or command sequences. Use Value: No-latency output and single-cycle settling simplify firmware-no FIFO management or timing-critical polling needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1115IDGSR | 4-channel input, programmable gain amplifier (PGA), 860 µA active current, no internal oscillator-requires external clock or MCU timing. | Supports differential inputs and variable gain; better for multi-sensor systems but higher power and larger footprint (10-lead VSSOP). | Select ADS1115IDGSR when channel count or PGA flexibility outweighs ultra-low power and minimal footprint requirements. |
| MCP3424-E/ST | 4-channel, 18-bit resolution, 250 µA active current, fixed 15 sps/3.75 sps rates, no auto-sleep-requires explicit shutdown command. | Higher resolution suited for lab-grade instrumentation; lacks single-cycle settling and continuous calibration. | Choose MCP3424-E/ST when 18-bit ENOB and differential channel density are prioritized over power efficiency and ease of multiplexing. |
Compared with ADS1115IDGSR and MCP3424-E/ST, the LTC2451CTS8#TRPBF offers the smallest package (TSOT-23), lowest active/sleep current, and simplest integration-ideal for size- and power-constrained single-input applications where 16-bit precision suffices.
Availability
LTC2451CTS8#TRPBF is available at Aetrix Electronics and suitable for system monitoring, environmental sensing, and portable instrumentation requiring stable component supply, long-term production continuity, and RoHS-compliant packaging.
Supply support for LTC2451CTS8#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 LTC2451CTS8#TRPBF belongs to ADI's ultra-low-power precision ADC product line, designed specifically for space-constrained, battery-operated measurement systems needing high resolution without external support components.
FAQ
What is the operating temperature range of the LTC2451CTS8#TRPBF?
The LTC2451CTS8#TRPBF is specified for 0°C to +70°C (Commercial grade). This range is confirmed by the "C" suffix in the part number and the order information table listing LTC2451CTS8#TRPBF under "0°C to 70°C" temperature grade. It uses the TSOT-23 package with θJA = 140°C/W.
Does the LTC2451CTS8#TRPBF require external passive components for basic operation?
No-except for mandatory VCC/GND decoupling (0.1 µF + 10 µF ceramics) and an external 1.7 kΩ pull-up resistor on SDA, the LTC2451CTS8#TRPBF needs no external timing components, reference ICs, or input buffers. Its internal oscillator and proprietary sampling scheme eliminate those dependencies.
How does the LTC2451CTS8#TRPBF achieve single-cycle settling time?
The LTC2451CTS8#TRPBF achieves single-cycle settling through a proprietary delta-sigma modulator architecture that completes full conversion-including digital filtering and output register update-in one sample period. Unlike conventional sigma-delta ADCs requiring multiple cycles to settle after input changes, it delivers valid data immediately after each conversion trigger.
Can the LTC2451CTS8#TRPBF operate with VREF+ and VREF– tied to VCC and GND respectively?
Yes-the LTC2451CTS8#TRPBF explicitly supports this configuration. When VREF+ = VCC and VREF– = GND, the input range becomes GND to VCC, enabling direct interfacing with unbuffered resistive sensors or voltage dividers without external reference circuitry.
What is the I²C address of the LTC2451CTS8#TRPBF and how is it configured?
The LTC2451CTS8#TRPBF has a fixed 7-bit I²C slave address of 0x24 (binary 0010100). It is factory-hardwired and not configurable via pins or registers. The device responds only to this address and supports standard/fast-mode protocols up to 400 kHz SCL frequency.
LTC2451CTS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- 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:
- I2C
- Configuration:
- ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- TSOT-23-8
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2451CTS8#TRPBF FAQ
1.How can I place an order for LTC2451CTS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2451CTS8#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 LTC2451CTS8#TRPBF reliable?
The price and inventory of LTC2451CTS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2451CTS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2451CTS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2451CTS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2451CTS8#TRPBF?
LTC2451CTS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2451CTS8#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 LTC2451CTS8#TRPBF?
For technical support, including LTC2451CTS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2451CTS8#TRPBF requirements.
6.How does Aetrix verify that LTC2451CTS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2451CTS8#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 LTC2451CTS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2451CTS8#TRPBF?
All LTC2451CTS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2451CTS8#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 LTC2451CTS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC2451CTS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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