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Analog Devices Inc. LTC2461IMS#TRPBF
- Part No.:
- LTC2461IMS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-TSSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2461IMS#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,787
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Product details
Overview
LTC2461IMS#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit single-ended delta-sigma ADC with integrated 1.25V precision reference, I²C interface, 60 sps output rate, and MSOP-12 package. It operates from 2.7V to 5.5V, draws 1.5mA during conversion and 200nA in sleep mode, and targets low-power sensor monitoring in space-constrained industrial systems.
For engineers reviewing the LTC2461IMS#TRPBF datasheet, LTC2461IMS#TRPBF pinout, LTC2461IMS#TRPBF application, or LTC2461IMS#TRPBF equivalent, key selection criteria include its guaranteed no-missing-codes performance, ±2 LSB typical offset error, ±0.01% typical gain error, 2ppm/°C reference drift (I-grade), and single-conversion settling for multiplexed analog inputs.
Technical Context
The LTC2461IMS#TRPBF implements a proprietary delta-sigma architecture with continuous internal offset and full-scale calibration, eliminating user intervention while ensuring accuracy over temperature and time. Its integrated oscillator eliminates external timing components, and its input sampling scheme reduces average input current to 50nA-enabling direct RC filter interfacing without significant error.
It supports two I²C slave addresses (0x24 or 0x54) via the A0 pin, includes programmable sleep mode (reference power-down), and delivers 16-bit results with no latency or filter settling delay-ensuring one-to-one correspondence between conversion completion and data availability on the SDA line.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes-guarantees monotonicity and full dynamic range utilization. |
| Input Range | 0 V to 1.25 V single-ended-matches internal reference; enables direct ratiometric sensing with 0–VREF scaling. |
| Reference Accuracy | 1.25 V ±0.1% initial, ±5 ppm/°C max drift (I-grade)-supports stable measurements across –40°C to +85°C without external trimming. |
| Conversion Rate | 60 conversions per second-provides real-time sampling for slow-varying signals like temperature or pressure. |
| Supply Current | 1.5 mA active, 200 nA sleep-enables battery-powered operation with >10-year runtime in duty-cycled sensing. |
| Integral Nonlinearity | ±1 LSB max-ensures high code-to-code consistency critical for precision instrumentation. |
| I²C Interface | Standard/Fast-mode (0–400 kHz), 7-bit address + R/W bit-compatible with legacy and modern microcontrollers without protocol translation. |
Pinout & Package
Package: 12-lead plastic MSOP (3.0 mm × 4.9 mm), exposed pad grounded, rated for –40°C to +85°C operating temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFOUT (1) | Reference output | Nominally 1.25 V; sets ADC full-scale range; requires 0.1 µF bypass to GND for noise suppression. |
| COMP (2) | Reference compensation | Stabilizes internal reference; must connect 0.1 µF capacitor to GND-value ≤ REFOUT capacitor. |
| A0 (3) | I²C address select | Configures slave address: GND → 0x24, VCC → 0x54-enables dual-device bus sharing. |
| GND (4,7,11) | Ground return | Multiple low-impedance ground connections reduce noise coupling and improve PSRR. |
| SCL (5) | I²C clock input | Slave-only interface; accepts external clock up to 400 kHz; defines data sampling edges. |
| SDA (6) | I²C bidirectional data | Open-drain output requiring external pull-up; transmits 16-bit result MSB-first on falling SCL edges. |
| REF– (8) | Reference negative input | Connects to system ground or sensor ground sense point-defines zero-scale reference potential. |
| IN (9) | Analog input | Single-ended input node (LTC2461 only); accepts 0–1.25 V; high-impedance with 0.35 pF sampling capacitance. |
| GND (10) | Input ground | Dedicated ground tie for IN pin-minimizes common-mode error in single-ended configuration. |
| VCC (12) | Positive supply | 2.7–5.5 V operation; requires local 10 µF + 0.1 µF bypassing for stable reference and conversion integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.25 V reference | Eliminates external reference IC and associated layout complexity while delivering ±5 ppm/°C max drift over –40°C to +85°C. |
| Proprietary input sampling | Reduces average input current to 50 nA-allows direct connection of RC anti-alias filters (e.g., 1 kΩ + 0.1 µF) with <1 LSB error. |
| Continuous offset calibration | Performs automatic offset correction every conversion cycle-maintains accuracy without user-triggered recalibration or downtime. |
| Zero-latency data output | Delivers final 16-bit result immediately after conversion completes-no FIFO buffering or filter group delay complicates timing in multiplexed systems. |
| Programmable sleep mode | Disables both ADC and reference to achieve 200 nA quiescent current-ideal for wake-on-event architectures with microcontroller-controlled polling. |
Applications
| Environmental Monitoring | Industrial Sensor Interface |
|---|---|
Use Scenario: Measuring temperature, humidity, or gas concentration in remote wireless nodes with limited PCB area and battery capacity. IC Role / Device Role / Timing Role: Single-ended ADC digitizing conditioned sensor outputs (e.g., thermistor voltage or bridge amplifier output) with ratiometric reference stability. Use Value: 1.5 mA active and 200 nA sleep current enable multi-year battery life; 16-bit resolution captures sub-degree thermal changes without oversampling. | Use Scenario: Reading analog outputs from pressure transducers, load cells, or current shunts in factory automation PLC modules. IC Role / Device Role / Timing Role: Precision front-end converter providing calibrated digital values to an MCU over I²C-replacing discrete op-amp + external ADC solutions. Use Value: Integrated 1.25 V reference with ±5 ppm/°C drift ensures measurement repeatability across ambient temperature swings without calibration tables. |
| Embedded System Health Monitoring | Portable Medical Instrumentation |
Use Scenario: Monitoring supply rail voltages, board temperature, or fan tachometer signals in network equipment or edge compute gateways. IC Role / Device Role / Timing Role: Low-power system monitor ADC acquiring multiple DC parameters via external multiplexer, synchronized via I²C global address call. Use Value: Single-conversion settling and no-latency output simplify firmware design; MSOP-12 footprint fits dense control boards without redesign. | Use Scenario: Digitizing biopotential signals (e.g., ECG lead-off detection or skin temperature) in handheld diagnostic devices. IC Role / Device Role / Timing Role: High-accuracy, low-noise ADC capturing slow-varying physiological signals with minimal power draw and compact packaging. Use Value: 2.2 µVRMS transition noise and ±1 LSB INL ensure clinical-grade fidelity; 12-lead MSOP eases hand-soldering during low-volume assembly. |
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 differential input, 16-bit, 860 sps max, 0.15 µVRMS noise, no integrated reference-requires external 2.048 V ref. | Higher speed and channel count but lacks on-chip reference and ultra-low sleep current (0.5 µA vs 200 nA). | Choose ADS1115IDGSR when multi-channel simultaneous sampling or higher throughput is required and external reference is acceptable. |
| MCP3421A0T-E/CH | 18-bit resolution, 15 sps, 2.048 V reference, 1 µA sleep current, I²C interface, SOIC-8 package. | Higher resolution but slower update rate and higher sleep current; no programmable reference power-down. | Choose MCP3421A0T-E/CH when absolute precision outweighs speed and ultra-low-power sleep requirements. |
Compared with ADS1115IDGSR and MCP3421A0T-E/CH, the LTC2461IMS#TRPBF uniquely balances 16-bit accuracy, integrated 1.25 V reference with 5 ppm/°C drift, 60 sps throughput, and industry-leading 200 nA sleep current in a space-efficient MSOP-12-making it optimal for battery-powered, single-input, long-duration monitoring.
Availability
LTC2461IMS#TRPBF is available at Aetrix Electronics and suitable for environmental monitoring, industrial sensor interface, and embedded system health monitoring requiring stable component supply, extended temperature support (–40°C to +85°C), and RoHS-compliant packaging.
Supply support for LTC2461IMS#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 semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2461IMS#TRPBF belongs to ADI's ultra-low-power precision ADC product line, designed specifically for space-constrained, battery-operated systems needing high-resolution analog sensing without external reference or timing components.
FAQ
What is the operating temperature range of the LTC2461IMS#TRPBF?
The LTC2461IMS#TRPBF is specified for operation from –40°C to +85°C (I-grade). This extended industrial temperature range ensures reliable performance in harsh environments such as factory floors, outdoor sensor enclosures, and automotive under-hood applications where ambient temperatures fluctuate widely. The device maintains its 16-bit resolution, ±2 LSB offset error, and ±5 ppm/°C reference drift across this full range.
Does the LTC2461IMS#TRPBF require external components for basic operation?
No, the LTC2461IMS#TRPBF requires only three external passive components for functional operation: a 0.1 µF capacitor on REFOUT to GND, a 0.1 µF capacitor on COMP to GND, and a pull-up resistor (typically 1.7 kΩ) on SDA. Its integrated oscillator, precision reference, and internal calibration eliminate the need for crystals, external references, or trimming networks-reducing BOM count and PCB area versus discrete ADC solutions.
How does the LTC2461IMS#TRPBF handle input overrange and underrange conditions?
The LTC2461IMS#TRPBF clamps output codes at digital extremes: input voltages below 0 V produce code 0 (all zeros), and inputs above 1.25 V produce code 65535 (all ones). Within the 0–1.25 V range, it delivers linear 16-bit output with no missing codes. This behavior simplifies firmware handling-no additional saturation logic is needed, and out-of-range events are unambiguously indicated by saturated codes.
Can the LTC2461IMS#TRPBF be used in a multi-device I²C system?
Yes, the LTC2461IMS#TRPBF supports two I²C slave addresses (0x24 and 0x54) selected via the A0 pin, enabling up to two devices on the same bus without address conflict. Additionally, it responds to the I²C global address (0x77) for synchronized conversion start across multiple LTC2461IMS#TRPBF units-critical for phase-aligned sampling in distributed sensor arrays.
What is the conversion time and how does it affect system timing?
The LTC2461IMS#TRPBF has a nominal conversion time of 16.6 ms (60 sps), with min/max values of 13 ms and 23 ms across temperature and supply. This fixed, deterministic duration allows precise scheduling of read operations-firmware can poll or use timer interrupts knowing exactly when valid data will be ready. No filter settling delay or variable latency exists, simplifying real-time control loop integration.
LTC2461IMS#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:
- -40°C ~ 85°C
- Supplier Device Package:
- 12-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2461IMS#TRPBF FAQ
1.How can I place an order for LTC2461IMS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2461IMS#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 LTC2461IMS#TRPBF reliable?
The price and inventory of LTC2461IMS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2461IMS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2461IMS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2461IMS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2461IMS#TRPBF?
LTC2461IMS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2461IMS#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 LTC2461IMS#TRPBF?
For technical support, including LTC2461IMS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2461IMS#TRPBF requirements.
6.How does Aetrix verify that LTC2461IMS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2461IMS#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 LTC2461IMS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2461IMS#TRPBF?
All LTC2461IMS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2461IMS#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 LTC2461IMS#TRPBF part is unused and in its original packaging.
Return procedure for LTC2461IMS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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