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Analog Devices Inc. LTC2461CMS#TRPBF
- Part No.:
- LTC2461CMS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-TSSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2461CMS#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,217
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Product details
Overview
LTC2461CMS#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit single-ended delta-sigma ADC with integrated 1.25V precision reference, I²C interface, 0V to 1.25V input range, and 60 conversions per second - designed for low-power system monitoring and embedded sensor digitization.
For engineers reviewing the LTC2461CMS#TRPBF datasheet, LTC2461CMS#TRPBF pinout, LTC2461CMS#TRPBF application, or LTC2461CMS#TRPBF equivalent, key selection criteria include its 200nA sleep current, ±2 LSB offset error (typ), 0.01% gain error (typ), 2ppm/°C reference drift (C-grade), and MSOP-12 package compatibility with space-constrained industrial and environmental sensing nodes.
Technical Context
The LTC2461CMS#TRPBF implements a proprietary delta-sigma architecture with continuous internal offset and full-scale calibration, eliminating latency in multiplexed applications. Its integrated oscillator enables operation without external timing components, and its input sampling scheme draws only 50nA average input current.
It operates from a single 2.7V to 5.5V supply, supports two I²C addresses (0010100b or 1010100b via A0 pin), and delivers no-missing-codes 16-bit resolution across 0°C to 70°C. The device transitions automatically between CONVERT (16.6 ms), SLEEP/NAP, and DATA INPUT/OUTPUT states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit, no missing codes - guarantees monotonicity and full dynamic range utilization in precision measurement. |
| Input Range | 0V to 1.25V single-ended - matches internal reference, enabling ratiometric accuracy without external scaling. |
| Conversion Rate | 60 conversions/second - supports real-time monitoring of slow-varying signals like temperature or pressure. |
| Reference Drift | ±2 ppm/°C (max, C-grade) - ensures <±0.0025% full-scale shift over 0°C–70°C ambient range. |
| Sleep Current | 200 nA - allows battery-powered nodes to achieve multi-year operation with periodic wake-up sampling. |
| Offset Error | 2 LSB (typ) - corresponds to ~38 µV at 1.25V reference, suitable for sub-100 µV signal resolution. |
| Gain Error | ±0.01% FS (typ) - contributes <±125 µV absolute error at full scale, critical for calibrated sensor interfaces. |
Pinout & Package
Package: 12-lead plastic MSOP (3mm × 4.9mm), exposed pad not connected in MSOP variant; RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFOUT (1) | Reference output | Nominally 1.25V, sets ADC full-scale; requires 0.1µF bypass to GND for stability and noise reduction. |
| COMP (2) | Reference compensation | Connects to same 0.1µF capacitor as REFOUT; stabilizes internal reference loop dynamics. |
| A0 (3) | I²C address select | Logic level sets slave address: GND → 0010100b, VCC → 1010100b; enables dual-device bus configuration. |
| GND (4,7,11) | Ground return | Three dedicated ground pins minimize ground bounce and improve PSRR in noisy environments. |
| SCL (5) | I²C clock input | Accepts standard/fast-mode clocks up to 400 kHz; synchronous timing for data readout and configuration writes. |
| SDA (6) | I²C bidirectional data | Open-drain output requiring external pull-up; transmits 16-bit conversion result MSB-first on falling SCL edges. |
| REF– (8) | Reference negative input | Typically tied to system ground or sensor reference; defines zero-input point for ADC transfer function. |
| IN (9) | Analog input (single-ended) | Accepts 0V–1.25V signals directly; high-impedance input with 0.35 pF sampling capacitance minimizes loading. |
| GND (10) | Input ground reference | Dedicated ground return for analog input path; isolates digital switching noise from sensitive input node. |
| VCC (12) | Supply voltage | 2.7V–5.5V operation; requires local 10µF + 0.1µF decoupling for stable conversion performance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.25V reference | 2ppm/°C drift (C-grade) and 0.1% initial accuracy eliminate need for external precision reference and reduce BOM count. |
| Zero-latency multiplexed sampling | Single-conversion settling enables direct channel switching without filter delay or data invalidation. |
| Proprietary input sampling | 50nA average input current allows direct RC filtering (e.g., 1kΩ + 0.1µF) with <1 LSB added error. |
| Configurable sleep mode | SLP bit powers down reference after conversion, reducing total quiescent current to 200nA for ultra-low-power duty cycling. |
| Continuous internal calibration | Per-conversion offset correction maintains accuracy over time and temperature without user intervention or interrupt overhead. |
Applications
| Environmental Monitoring | System Health Monitoring |
|---|---|
Use Scenario: Measuring thermistor or RTD voltage outputs in HVAC sensors or weather stations. IC Role / Device Role / Timing Role: Single-ended ADC digitizing ratiometric bridge or voltage divider outputs referenced to internal 1.25V. Use Value: 16-bit resolution and 2ppm/°C reference drift enable ±0.1°C temperature accuracy over 0°C–70°C without external calibration. | Use Scenario: Reading supply rail voltages (e.g., 3.3V, 5V) and internal die temperature in microcontroller-based edge devices. IC Role / Device Role / Timing Role: Low-power system monitor ADC acquiring multiple rails sequentially via shared I²C bus. Use Value: 200nA sleep current extends battery life in always-on monitoring; 60Hz rate captures transient brownouts and thermal trends. |
| Direct Temperature Measurements | Embedded ADC Upgrades |
Use Scenario: Digitizing thermocouple cold-junction compensation or semiconductor temperature sensor outputs. IC Role / Device Role / Timing Role: Precision ADC interfacing to analog temperature sensors with minimal external components. Use Value: Integrated reference and no-missing-codes performance ensure linear response across full industrial temperature range. | Use Scenario: Replacing legacy 12-bit ADCs (e.g., ADS7822, MCP3201) in existing PCBs where layout space and power budget are constrained. IC Role / Device Role / Timing Role: Pin-compatible upgrade delivering 4× resolution improvement with identical MSOP-12 footprint and I²C protocol. Use Value: Same package and interface simplify drop-in replacement; 16-bit output enables higher diagnostic fidelity without firmware changes. |
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 differential input, programmable gain amplifier (PGA), 860SPS max, 150nA sleep current, no integrated reference (requires external or VDD-referenced). | Better suited for multi-channel, variable-range sensor arrays; lacks internal reference stability for ratiometric precision. | Select when channel count >1 or PGA flexibility is required; avoid when reference drift <5ppm/°C is mandatory. |
| MCP3424-E/ST | 4-channel delta-sigma, 18-bit resolution, 3.75SPS–15SPS, 1ppm/°C reference drift, I²C interface, but no sleep mode below 1µA. | Higher resolution at lower speed; optimized for static or slowly varying measurements (e.g., weigh scales), not dynamic monitoring. | Select for ultra-high-precision static measurements; avoid for battery-powered nodes needing sub-µA sleep. |
Compared with ADS1115IDGSR and MCP3424-E/ST, the LTC2461CMS#TRPBF uniquely balances 16-bit precision, 60SPS throughput, 200nA sleep current, and integrated 2ppm/°C reference - making it optimal for compact, battery-aware environmental and system monitors where ratiometric accuracy and low quiescent power are jointly critical.
Availability
LTC2461CMS#TRPBF is available at Aetrix Electronics and suitable for environmental monitoring, system health monitoring, and embedded ADC upgrades requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC2461CMS#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 LTC2461CMS#TRPBF belongs to ADI's ultra-low-power precision ADC product line, engineered specifically for space- and energy-constrained sensing applications where integrated reference stability and I²C simplicity are essential.
FAQ
What is the operating temperature range of the LTC2461CMS#TRPBF?
The LTC2461CMS#TRPBF is specified for 0°C to 70°C (C-grade). This range is confirmed in the "ORDER INFORMATION" table of the datasheet, where "LTC2461CMS#TRPBF" is explicitly listed under "TEMPERATURE RANGE: 0°C to 70°C". It uses the MSOP-12 package and is rated for commercial ambient conditions, not extended industrial or automotive ranges.
Does the LTC2461CMS#TRPBF require external components for basic operation?
No, the LTC2461CMS#TRPBF requires only three external passive components for functional operation: a 0.1µF capacitor on REFOUT, a 0.1µF capacitor on COMP, and a 1.7kΩ pull-up resistor on SDA. The internal oscillator eliminates need for crystals or RC timing networks, and the integrated 1.25V reference removes requirement for external voltage references - enabling true "no-external-components" ADC functionality in many designs.
How does the LTC2461CMS#TRPBF handle overrange and underrange input conditions?
The LTC2461CMS#TRPBF clamps output codes at extremes: input < 0V yields code 0 (all zeros); input > 1.25V yields code 65535 (all ones). This behavior is defined in the "Input Voltage Range (LTC2461)" section and verified in Table 1. No saturation recovery delay or flag is generated - the output reflects hard clipping, simplifying firmware handling in ratiometric sensor applications.
Can the LTC2461CMS#TRPBF be used with a 3.3V microcontroller I²C bus?
Yes, the LTC2461CMS#TRPBF supports I²C operation with 3.3V logic levels: VIH is specified as 0.7×VCC (min), so at VCC = 3.3V, VIH(min) = 2.31V - comfortably within standard 3.3V I²C high-level range. Its open-drain SDA and Schmitt-trigger SCL inputs tolerate mixed-voltage buses, and digital input leakage remains ≤±10µA across the full temperature range.
What is the conversion time and how does it affect multiplexed sampling?
The LTC2461CMS#TRPBF has a nominal conversion time of 16.6 ms (13–23 ms min–max). Crucially, it provides single-conversion settling - meaning each acquired sample is fully settled and valid upon completion, with no filter group delay or latency. This enables reliable interleaved sampling across multiple sensors without inter-sample crosstalk or timing compensation in firmware.
LTC2461CMS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-TSSOP (0.118", 3.00mm Width)
- 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:
- Internal
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- Selectable Address
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 12-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2461CMS#TRPBF FAQ
1.How can I place an order for LTC2461CMS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2461CMS#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 LTC2461CMS#TRPBF reliable?
The price and inventory of LTC2461CMS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2461CMS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2461CMS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2461CMS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2461CMS#TRPBF?
LTC2461CMS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2461CMS#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 LTC2461CMS#TRPBF?
For technical support, including LTC2461CMS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2461CMS#TRPBF requirements.
6.How does Aetrix verify that LTC2461CMS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2461CMS#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 LTC2461CMS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2461CMS#TRPBF?
All LTC2461CMS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2461CMS#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 LTC2461CMS#TRPBF part is unused and in its original packaging.
Return procedure for LTC2461CMS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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