My Inquiry
My Account
Analog Devices Inc. LTC2461IDD#TRPBF
- Part No.:
- LTC2461IDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LTC2461IDD#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,024
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2461IDD#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit delta-sigma analog-to-digital converter with integrated 1.25V precision reference, single-ended input (0V to 1.25V), I²C interface, and ultra-low 200nA sleep current. It operates from 2.7V to 5.5V, delivers 60 conversions per second, and targets high-accuracy sensor digitization in space-constrained industrial monitoring systems.
For engineers reviewing the LTC2461IDD#TRPBF datasheet, LTC2461IDD#TRPBF pinout, LTC2461IDD#TRPBF application, or LTC2461IDD#TRPBF equivalent, key selection criteria include its guaranteed no-missing-codes performance, ±2 LSB typical offset error, 2ppm/°C reference drift (I-grade), 1.5mA active supply current, and compatibility with standard-mode and fast-mode I²C buses up to 400kHz.
Technical Context
The LTC2461IDD#TRPBF implements a proprietary delta-sigma architecture with continuous internal offset and full-scale calibration, eliminating user intervention while ensuring accuracy over temperature (–40°C to +85°C) and time. Its integrated oscillator removes external timing components, and its input sampling scheme draws only 50nA average input current - enabling direct RC filtering without significant error.
It supports two I²C slave addresses (0010100b or 1010100b) via the A0 pin, includes programmable sleep mode (reference power-down), and delivers conversion results with zero latency - each 16-bit output corresponds one-to-one with the most recently completed conversion, making it ideal for multiplexed multi-channel sensing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit, no missing codes - guarantees monotonicity and full code coverage across full input range. |
| Input Range | 0V to 1.25V single-ended - matches internal reference; enables direct connection to ratiometric sensors. |
| Reference Accuracy | 1.25V ±0.1% initial, ±5 ppm/°C max drift (I-grade) - ensures stable full-scale definition across operating temperature. |
| Conversion Rate | 60 conversions/second - supports real-time monitoring of slow-varying physical parameters (e.g., temperature, pressure). |
| Supply Current | 1.5mA active, 200nA sleep - enables battery-powered operation for >10-year lifetime in low-duty-cycle IoT nodes. |
| I²C Interface | Standard/Fast-mode (0–400kHz), 7-bit address + R/W bit - interoperates with legacy and modern microcontrollers without protocol translation. |
| Offset Error | ±2 LSB typical - translates to <39 µV error at 1.25V FS, sufficient for 12-bit-equivalent system accuracy without trimming. |
Pinout & Package
Package: 12-lead (3mm × 3mm) plastic DFN with exposed pad (DD package), rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFOUT (1) | Reference output | Nominally 1.25V; sets ADC full-scale; requires 0.1µF bypass to GND for noise suppression and stability. |
| COMP (2) | Reference compensation | Connects to same 0.1µF capacitor as REFOUT; critical for minimizing reference voltage drift and noise. |
| A0 (3) | I²C address select | Logic level determines slave address: GND → 0010100b, VCC → 1010100b - enables dual-device addressing on same bus. |
| GND (4, 7, 11, 13) | Ground return | Multiple dedicated ground pins and exposed pad ensure low-impedance return path and thermal dissipation. |
| SCL (5) | I²C clock input | Slave-only interface; accepts external clock up to 400kHz; defines data sampling edges for SDA. |
| 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 | Tied to system ground or sensor ground sense point; defines zero-scale input voltage for ADC. |
| IN (9) | Analog input (single-ended) | Accepts 0V to 1.25V signal; high-impedance input with 0.35pF sampling capacitance minimizes loading. |
| GND (10) | Input ground reference | Dedicated ground return for IN pin; isolates analog input path from digital noise sources. |
| VCC (12) | Positive supply | 2.7V–5.5V operation; requires local 10µF + 0.1µF bypassing to maintain PSRR >80dB across frequency. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.25V reference | 2ppm/°C max drift (I-grade) and 0.1% initial accuracy eliminate need for external precision reference and reduce BOM count. |
| Zero-latency data output | One-to-one mapping between conversion completion and 16-bit output ensures deterministic timing for multiplexed sensor arrays. |
| Continuous auto-calibration | Per-conversion offset and full-scale correction maintains accuracy over temperature and aging without interrupting operation. |
| Ultra-low input sampling current | 50nA average draw allows direct use of simple RC filters (e.g., 1kΩ + 0.1µF) with <1 LSB added error - simplifies anti-aliasing design. |
| Configurable sleep mode | Software-selectable reference shutdown reduces total current to 200nA, enabling multi-year battery life in wake-on-event applications. |
Applications
| Environmental Monitoring | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Measuring temperature, humidity, or gas concentration in unattended field deployments using thermistors, RTDs, or electrochemical cells. IC Role / Device Role / Timing Role: Single-ended ADC digitizing low-bandwidth analog outputs; provides stable 16-bit resolution referenced to internal 1.25V source. Use Value: Eliminates external reference and calibration circuitry, reducing PCB area by >30% and enabling sub-5mm² sensor node designs. |
Use Scenario: Digitizing 4–20mA loop signals, strain gauge bridges, or potentiometer wiper voltages in PLC I/O modules. IC Role / Device Role / Timing Role: Precision front-end ADC with ratiometric input support; interfaces directly to conditioned sensor outputs without gain scaling. Use Value: ±2 LSB offset error and 0.01% gain error enable <0.1% total system accuracy without factory calibration. |
| Portable Medical Devices | Energy Metering Subsystems |
|
Use Scenario: Blood glucose meters, pulse oximeters, or wearable ECG front-ends requiring low-power, high-linearity analog acquisition. IC Role / Device Role / Timing Role: Low-noise, low-drift ADC capturing biopotential or optical sensor signals; operates from coin-cell batteries. Use Value: 200nA sleep current extends battery life to >5 years in intermittent-read applications (e.g., daily glucose checks). |
Use Scenario: Secondary metrology channels in smart meters measuring auxiliary parameters like temperature-compensated crystal oscillator drift or supply rail health. IC Role / Device Role / Timing Role: Auxiliary ADC providing high-stability reference tracking and environmental compensation data for primary metering ICs. Use Value: 2ppm/°C reference drift ensures <10ppm total error contribution over –40°C to +85°C - meeting IEC 62053-21 Class 0.5 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1115IDGSR | 16-bit, 860SPS, PGA (±256mV to ±6.144V), no internal reference - requires external 2.048V ref for best accuracy. | Supports wider input ranges via PGA; better suited for mixed-signal systems needing programmable gain, but lacks integrated reference stability. | Choose ADS1115IDGSR when input signal amplitude varies widely and PGA flexibility outweighs reference integration benefits. |
| MCP3421A0T-E/CH | 18-bit, 15SPS, internal 2.048V reference (15ppm/°C), I²C interface - higher resolution but 4× slower and worse reference drift than LTC2461IDD#TRPBF. | Better resolution for static measurements; unsuitable for dynamic or temperature-critical applications due to reference drift and speed limitations. | Choose MCP3421A0T-E/CH only for ultra-high-resolution DC measurements where 15SPS and 15ppm/°C drift are acceptable. |
Compared with ADS1115IDGSR and MCP3421A0T-E/CH, the LTC2461IDD#TRPBF uniquely balances 16-bit no-missing-codes performance, integrated 2ppm/°C reference, 60SPS throughput, and 200nA sleep current - making it optimal for compact, battery-efficient, temperature-stable sensor nodes where reference autonomy and low power are non-negotiable.
Availability
LTC2461IDD#TRPBF is available at Aetrix Electronics and suitable for industrial sensor interface, portable medical devices, environmental monitoring, and energy metering subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2461IDD#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 LTC2461IDD#TRPBF belongs to ADI's ultra-precision delta-sigma ADC family designed specifically for space-constrained, low-power applications demanding reference autonomy, guaranteed linearity, and seamless I²C integration - not general-purpose data acquisition.
FAQ
What is the operating temperature range of the LTC2461IDD#TRPBF?
The LTC2461IDD#TRPBF is specified for –40°C to +85°C operation (I-grade). This rating is validated across all electrical parameters including reference drift (±5 ppm/°C max), offset error (±2 LSB typical), and supply current (1.5mA active, 200nA sleep), ensuring reliable performance in industrial and automotive-adjacent environments where ambient temperature fluctuates widely.
Does the LTC2461IDD#TRPBF require an external crystal or oscillator?
No, the LTC2461IDD#TRPBF includes a fully integrated oscillator and requires no external timing components. This eliminates board space, cost, and layout sensitivity associated with crystals or RC networks, while maintaining consistent 60 conversions per second timing across voltage (2.7V–5.5V) and temperature (–40°C to +85°C) variations - a key enabler for ultra-compact sensor node designs.
How does the LTC2461IDD#TRPBF handle input overrange or underrange conditions?
The LTC2461IDD#TRPBF clamps output codes at digital extremes: input < 0V yields 0x0000 (0 decimal), input > 1.25V yields 0xFFFF (65535 decimal). This behavior is deterministic and documented in the output data format table. No saturation recovery delay occurs, and subsequent conversions remain fully accurate - critical for fault-tolerant sensor systems detecting open-circuit or short-circuit conditions.
Can the LTC2461IDD#TRPBF be used with a 3.3V microcontroller I²C bus?
Yes, the LTC2461IDD#TRPBF supports standard- and fast-mode I²C (0–400kHz) with VIH = 0.7VCC and VIL = 0.3VCC logic thresholds. At VCC = 3.3V, it accepts 2.31V as high and 0.99V as low - fully compatible with 3.3V GPIOs. Its 10pF pin capacitance and 400pF bus load tolerance ensure robust communication even with longer traces or multiple slaves on the same bus.
What is the purpose of the COMP pin on the LTC2461IDD#TRPBF?
The COMP pin on the LTC2461IDD#TRPBF connects to the same 0.1µF capacitor as REFOUT and stabilizes the internal reference amplifier's feedback loop. Omitting or mismatching this capacitor degrades reference voltage temperature coefficient and increases output noise - violating the ±5 ppm/°C max drift specification. Proper COMP pin decoupling is mandatory for achieving datasheet accuracy across the full –40°C to +85°C range.
LTC2461IDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- 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-DFN (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2461IDD#TRPBF FAQ
1.How can I place an order for LTC2461IDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2461IDD#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 LTC2461IDD#TRPBF reliable?
The price and inventory of LTC2461IDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2461IDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2461IDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2461IDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2461IDD#TRPBF?
LTC2461IDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2461IDD#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 LTC2461IDD#TRPBF?
For technical support, including LTC2461IDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2461IDD#TRPBF requirements.
6.How does Aetrix verify that LTC2461IDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2461IDD#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 LTC2461IDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2461IDD#TRPBF?
All LTC2461IDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2461IDD#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 LTC2461IDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2461IDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2461IDD#TRPBF Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
