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Analog Devices Inc. LTC2451ITS8#TRPBF
- Part No.:
- LTC2451ITS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2451ITS8#TRPBF.pdf
- Description:
- IC ADC 16BIT SIG-DELTA TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:5,733
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Product details
Overview
LTC2451ITS8#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit delta-sigma analog-to-digital converter with single-ended input, I²C interface, and integrated oscillator. It operates from 2.7V to 5.5V, achieves 2 LSB INL and 0.02 LSB RMS noise, and delivers programmable 30/60 conversions per second in a TSOT-23-8 package. It is used for precision system monitoring and embedded sensor digitization where low power and minimal external components are critical.
For engineers reviewing the LTC2451ITS8#TRPBF datasheet, LTC2451ITS8#TRPBF pinout, LTC2451ITS8#TRPBF application, or LTC2451ITS8#TRPBF equivalent, key selection considerations include its single-cycle settling time for multiplexed inputs, 50 nA average input sampling current enabling direct RC filtering, sleep current below 0.2 µA, and guaranteed no missing codes over –40°C to +85°C.
Technical Context
The LTC2451ITS8#TRPBF implements a proprietary delta-sigma modulator core with internal oscillator and continuous offset calibration in 30 Hz mode. Its input sampling architecture reduces average input current to 50 nA, eliminating need for active buffering in many applications.
It uses a fixed 7-bit I²C slave address (0010100), supports standard/fast-mode I²C up to 400 kHz, and provides transparent auto-shutdown after each conversion. Reference inputs (REF+, REF–) accept differential voltages ≥2.5 V across GND to VCC, enabling flexible ratiometric or absolute measurement configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit, no missing codes - ensures monotonic transfer function and full code coverage across full temperature range. |
| INL | 2 LSB max - guarantees linearity error ≤ ±0.003% of full scale, critical for high-fidelity sensor digitization. |
| RMS Noise | 0.02 LSB - corresponds to ~1.4 µVRMS at 5 V reference, enabling sub-millivolt signal resolution. |
| Conversion Rate | Programmable 30 or 60 sps - allows trade-off between noise performance and throughput without firmware changes. |
| Sleep Current | <0.2 µA - enables multi-year battery life in intermittent-read sensor nodes. |
| Input Sampling Current | 50 nA avg - permits use of simple 1 kΩ/0.1 µF RC filter with <1 LSB error, eliminating op-amp buffer. |
| Supply Range | 2.7 V to 5.5 V - supports direct connection to common microcontroller rails (3.3 V or 5 V) without LDO. |
Pinout & Package
Package: 8-lead TSOT-23 (3 mm × 1.75 mm), exposed pad (GND), rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 5) | Ground reference | Primary analog/digital return; exposed pad (Pin 9) must be soldered to PCB ground plane for thermal and noise performance. |
| REF– (Pin 2) | Negative reference input | Differential reference terminal; sets lower bound of input range (VIN ≥ VREF–); requires ≥2.5 V difference from REF+. |
| REF+ (Pin 3) | Positive reference input | Differential reference terminal; sets upper bound of input range (VIN ≤ VREF+); may be tied to VCC for single-supply operation. |
| VCC | Power supply | Single 2.7–5.5 V supply; requires local 0.1 µF + 10 µF decoupling to GND for optimal PSRR and noise immunity. |
| IN (Pin 6) | Analog input | Single-ended input referenced to REF–/REF+; accepts DC-coupled signals with 50 nA average sampling current. |
| SCL (Pin 7) | I²C clock input | Slave-only interface; accepts external clock up to 400 kHz; timing-critical for data synchronization. |
| SDA (Pin 8) | I²C bidirectional data | Open-drain output during read; requires external 1.7 kΩ pull-up to VCC; transmits 16-bit MSB-first result on falling SCL edges. |
Key Features
| Feature | Design Value |
|---|---|
| Single-cycle settling time | Enables true multiplexed ADC operation - no delay or reconfiguration needed when switching inputs. |
| Internal oscillator | Eliminates all external timing components (crystal, caps, resistors), reducing BOM count and layout area. |
| Continuous offset calibration (30 Hz mode) | Maintains <1 mV offset drift over –40°C to +85°C without user intervention or calibration cycles. |
| Ultra-low input sampling current | 50 nA average enables direct RC anti-aliasing with <1 LSB error - no op-amp buffer required. |
| Auto shutdown after conversion | Reduces average power to <50 µW at 1 sps (2.7 V), extending battery life in portable instrumentation. |
Applications
| System Monitoring | Environmental Monitoring |
|---|---|
Use Scenario: Real-time voltage, current, and temperature tracking in industrial PLCs and power supplies. IC Role / Device Role / Timing Role: Precision single-ended ADC digitizing analog sensor outputs with minimal latency and no missing codes. Use Value: Enables accurate fault detection and closed-loop control using only two I²C lines and no external clock components. | Use Scenario: Battery-powered air quality sensors measuring CO₂, humidity, and ambient temperature. IC Role / Device Role / Timing Role: Low-power ADC acquiring slow-varying environmental signals at 30 sps with automatic offset correction. Use Value: Achieves >10-year battery life via 0.2 µA sleep current and eliminates calibration drift across seasonal temperature swings. |
| Direct Temperature Measurements | Embedded ADC Upgrades |
Use Scenario: RTD or thermistor-based temperature sensing in medical devices and HVAC controls. IC Role / Device Role / Timing Role: High-linearity ADC interfacing directly to ratiometric bridge circuits with REF+/REF– driven by same reference. Use Value: Delivers 2 LSB INL and 0.02 LSB noise without external gain/offset trimming, reducing calibration overhead. | Use Scenario: Replacing legacy 12-bit ADCs in existing microcontroller-based designs to improve resolution without board redesign. IC Role / Device Role / Timing Role: Pin-compatible drop-in upgrade offering 16-bit resolution, I²C interface, and identical TSOT-23 footprint. Use Value: Increases measurement fidelity by 16× while maintaining same PCB layout, firmware I²C driver, and supply rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit I²C ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1115IDGSR | 4-channel input mux, programmable gain amplifier (PGA), 128–860 sps, 16-bit resolution, 150 nA input bias current. | Supports differential/muxed inputs and PGA; higher input current requires buffering for high-Z sources. | Select when multi-channel acquisition or variable gain is required; not suitable for ultra-low-input-current direct RC filtering. |
| MCP3424-E/ST | 4-channel delta-sigma ADC, 18-bit resolution, 15 sps default, 2.7–5.5 V supply, 1 µA typical sleep current. | Higher resolution but slower speed and higher sleep current; lacks single-cycle settling for multiplexed use. | Select when ultimate DC accuracy outweighs speed and power; avoid when fast channel switching or sub-µA sleep is mandatory. |
Compared with ADS1115IDGSR and MCP3424-E/ST, the LTC2451ITS8#TRPBF uniquely combines single-cycle settling, 50 nA input current, and 0.2 µA sleep in a TSOT-23 package - making it optimal for low-power, single-input, high-stability applications where simplicity and minimal external components are prioritized.
Availability
LTC2451ITS8#TRPBF is available at Aetrix Electronics and suitable for system monitoring, environmental sensing, and embedded ADC upgrades requiring stable component supply across industrial temperature ranges.
Supply support for LTC2451ITS8#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 IC portfolio, emphasizing metrology-grade performance, low power, and robust design for demanding applications.
The LTC2451ITS8#TRPBF belongs to Linear's ultra-low-power delta-sigma ADC family, engineered for embedded systems where size, power, and accuracy must coexist - especially in battery-operated instrumentation and space-constrained industrial sensors.
FAQ
What is the operating temperature range of the LTC2451ITS8#TRPBF?
The LTC2451ITS8#TRPBF is specified for –40°C to +85°C operation (I-grade). This extended range ensures reliable performance in industrial environments, outdoor sensor nodes, and automotive under-hood applications where thermal stability is critical. The device includes continuous internal offset calibration in 30 Hz mode to maintain accuracy across this full span.
Does the LTC2451ITS8#TRPBF require external clock components?
No, the LTC2451ITS8#TRPBF integrates a precision oscillator and requires no external crystal, resonator, or timing capacitors. This simplifies design, reduces BOM cost, and improves reliability - especially in high-vibration or miniaturized applications. All timing is self-contained, including conversion clock and I²C interface synchronization.
How does the LTC2451ITS8#TRPBF achieve single-cycle settling time?
The LTC2451ITS8#TRPBF uses a proprietary delta-sigma modulator architecture with optimized input sampling and internal digital filtering that completes full settling within one conversion period. Unlike conventional delta-sigma ADCs requiring multiple cycles to settle after input changes, the LTC2451ITS8#TRPBF delivers valid data immediately after each conversion command - essential for multiplexed sensor arrays.
What is the I²C address of the LTC2451ITS8#TRPBF?
The LTC2451ITS8#TRPBF has a fixed 7-bit I²C slave address of 0010100 (0x24 in hexadecimal). It operates only as a slave device and supports standard/fast-mode I²C up to 400 kHz. No address pins or configuration bits exist - the address is factory-hardwired and immutable across all variants including LTC2451ITS8#TRPBF.
Can the LTC2451ITS8#TRPBF operate with a 3.3 V supply and 3.3 V reference?
Yes, the LTC2451ITS8#TRPBF supports 3.3 V operation: VCC = 3.3 V, REF+ = 3.3 V, REF– = 0 V. Input range becomes 0 V to 3.3 V, and all specifications - including 2 LSB INL, 0.02 LSB noise, and 400 µA supply current - are guaranteed across the full –40°C to +85°C range under these conditions. The device's 2.7–5.5 V supply range ensures compatibility with common logic rails.
LTC2451ITS8#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:
- -40°C ~ 85°C
- Supplier Device Package:
- TSOT-23-8
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2451ITS8#TRPBF FAQ
1.How can I place an order for LTC2451ITS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2451ITS8#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 LTC2451ITS8#TRPBF reliable?
The price and inventory of LTC2451ITS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2451ITS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2451ITS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2451ITS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2451ITS8#TRPBF?
LTC2451ITS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2451ITS8#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 LTC2451ITS8#TRPBF?
For technical support, including LTC2451ITS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2451ITS8#TRPBF requirements.
6.How does Aetrix verify that LTC2451ITS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2451ITS8#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 LTC2451ITS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2451ITS8#TRPBF?
All LTC2451ITS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2451ITS8#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 LTC2451ITS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC2451ITS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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