My Inquiry
My Account
Analog Devices Inc. LTC2461CMS#PBF
- Part No.:
- LTC2461CMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-TSSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2461CMS#PBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:696
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2461CMS#PBF 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), and I²C interface. It delivers 2 LSB typical offset error, ±0.01% typical gain error, and 60 conversions per second in a 12-lead MSOP package rated for 0°C to 70°C operation. It is used in embedded system monitoring where low power, small size, and self-calibrating accuracy are critical.
For engineers reviewing the LTC2461CMS#PBF datasheet, LTC2461CMS#PBF pinout, LTC2461CMS#PBF application, or LTC2461CMS#PBF equivalent, key selection considerations include its 200nA sleep current, internal oscillator eliminating external timing components, 1.25V reference drift ≤10ppm/°C (max), and compatibility with standard-mode and fast-mode I²C buses up to 400kHz.
Technical Context
The LTC2461CMS#PBF implements a proprietary delta-sigma architecture with continuous internal offset and full-scale calibration-transparent to the user and performed every conversion cycle. Its input sampling scheme reduces average input current to 50nA, enabling direct RC filter interfacing without significant error.
It operates from a single 2.7V–5.5V supply, uses an internal oscillator (no external crystal required), and supports two I²C slave addresses (0010100b or 1010100b) via the A0 pin. Conversion time is fixed at 13–23ms (typ. 16.6ms), with no latency between completion and data availability on the SDA line.
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 sensor interfacing without external scaling. |
| Reference Voltage | 1.25V ±3mV (1.247V–1.253V) - stable output with ≤10ppm/°C max drift (C-grade), reducing system-level temperature compensation burden. |
| Conversion Rate | 60 conversions per second - supports real-time monitoring of slow-varying signals (e.g., temperature, pressure) with relaxed anti-aliasing filtering. |
| Supply Current | 1.5mA during conversion, 200nA in sleep mode - enables battery-powered or energy-harvested applications with extended duty cycling. |
| I²C Interface | Standard- and fast-mode compatible (≤400kHz), 7-bit address + R/W bit - integrates seamlessly into existing microcontroller-based I²C systems without protocol translation. |
| Offset Error | 2 LSB typical (≤15 LSB max) - ensures high DC accuracy for precision measurement without factory trimming. |
| Gain Error | ±0.01% typical - minimizes full-scale scaling error in calibrated sensor front-ends. |
Pinout & Package
Package: 12-lead plastic MSOP (3.0mm × 4.9mm × 1.0mm height), exposed pad not connected in MSOP variant. RoHS-compliant lead-free finish (PBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFOUT (Pin 1) | Reference output | Nominally 1.25V reference voltage source; must be decoupled with 0.1µF to GND; sets ADC full-scale range. |
| COMP (Pin 2) | Reference compensation | Stabilizes internal reference; requires 0.1µF capacitor to GND; value must be ≥ REFOUT capacitor. |
| A0 (Pin 3) | I²C address select | Determines slave address: tied to GND → 0010100b; tied to VCC → 1010100b; enables dual-device bus configuration. |
| GND (Pins 4, 7, 11) | Ground return | Three dedicated ground pins minimize ground bounce and improve noise immunity; connect directly to low-impedance ground plane. |
| SCL (Pin 5) | I²C clock input | Slave-only serial clock input; accepts external 0–400kHz clock; rising edge latches data, falling edge outputs data. |
| SDA (Pin 6) | I²C bidirectional data | Open-drain output requiring external pull-up; transmits 16-bit conversion result MSB-first on falling SCL edges. |
| REF– (Pin 8) | Reference negative input | Defines zero-scale point; typically tied to system ground or remote sensor ground sense point. |
| IN (Pin 9) | Analog input | Single-ended input node (LTC2461 only); accepts 0V to 1.25V; high-impedance with 0.35pF sampling capacitance. |
| GND (Pin 10) | Input ground reference | Internal connection to ground for single-ended operation; not used as signal return in LTC2461. |
| VCC (Pin 12) | Power supply | 2.7V–5.5V analog/digital supply; requires 10µF + 0.1µF parallel bypassing close to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.25V reference | 2ppm/°C typical drift, 0.1% initial accuracy - eliminates need for external reference IC and associated layout complexity. |
| Zero-latency data output | 16-bit result available immediately after conversion completes - enables deterministic timing in multiplexed sensor systems. |
| Ultra-low input sampling current | 50nA average - allows use of simple RC filters (e.g., 1kΩ + 0.1µF) with <1 LSB added error, simplifying anti-aliasing design. |
| Automatic power management | Auto-nap after conversion; optional SLEEP mode cuts total current to 200nA - extends battery life in intermittent-read applications. |
| Continuous background calibration | Per-conversion offset and full-scale correction - maintains accuracy over temperature and time without user intervention. |
| No external oscillator required | On-chip oscillator - removes crystal, load capacitors, and associated board space and cost; supports immediate startup. |
Applications
| Environmental Sensor Node | Industrial Process Monitor |
|---|---|
|
Use Scenario: Battery-powered wireless temperature/humidity node measuring thermistor and capacitive humidity sensor outputs. IC Role / Device Role / Timing Role: Single-ended ADC digitizing conditioned analog outputs; provides stable 1.25V reference for sensor excitation and ratiometric measurement. Use Value: 200nA sleep current extends 10-year battery life; 16-bit resolution resolves <1mK temperature changes; I²C simplifies MCU integration. |
Use Scenario: DIN-rail mounted PLC module acquiring 4–20mA loop signals via precision shunt resistors. IC Role / Device Role / Timing Role: High-accuracy, low-drift ADC converting shunt voltage; internal reference eliminates matching errors between reference and signal path. Use Value: ±0.01% gain error and ≤10ppm/°C reference drift ensure <0.1% total system accuracy over 0°C–70°C industrial ambient range. |
| Medical Vital Sign Front-End | Embedded System Health Monitor |
|
Use Scenario: Portable pulse oximeter measuring photodiode currents through transimpedance amplifiers. IC Role / Device Role / Timing Role: Low-noise, low-input-current ADC capturing amplified optical channel outputs; 50nA sampling current prevents TIA output loading. Use Value: Transition noise of 2.2µVRMS and 16-bit resolution support detection of weak AC plethysmographic signals amid DC bias. |
Use Scenario: Server motherboard monitoring rail voltages (1.8V, 3.3V, 5V, 12V), temperature, and fan tachometer signals. IC Role / Device Role / Timing Role: Multi-channel system monitor ADC; reads multiple rails sequentially via external multiplexer; I²C allows shared bus with other PMBus devices. Use Value: 60Hz conversion rate supports real-time health telemetry; 1.5mA active current fits within platform power budget; MSOP footprint saves board area. |
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; no integrated reference (requires external 2.048V ref); 88dB SNR vs. LTC2461's 90dB typical; 128SPS max rate. | Supports simultaneous multi-channel acquisition but lacks internal reference stability and ultra-low sleep current (0.15mA vs. 200nA). | Choose ADS1115IDGSR when multi-channel scanning without external MUX is needed and reference sourcing is already centralized. |
| MCP3424-E/SL | 4-channel, 18-bit resolution; internal 2.048V reference (15ppm/°C); 15SPS max rate; no I²C address select pin (fixed address). | Better resolution and INL (±4ppm FS) but slower speed and higher sleep current (1µA); lacks A0 pin flexibility for multi-device addressing. | Choose MCP3424-E/SL when ultimate DC precision outweighs speed and power constraints, and bus topology permits fixed addressing. |
Compared with ADS1115IDGSR and MCP3424-E/SL, the LTC2461CMS#PBF uniquely balances ultra-low sleep current (200nA), integrated 1.25V reference with ≤10ppm/°C drift, and 60SPS throughput-making it optimal for compact, battery-sensitive, single-channel precision sensing where reference autonomy matters.
Availability
LTC2461CMS#PBF is available at Aetrix Electronics and suitable for environmental sensor nodes, industrial process monitors, and embedded system health monitors requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for LTC2461CMS#PBF 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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LTC2461CMS#PBF belongs to Linear's ultra-low-power, integrated-reference delta-sigma ADC family, designed specifically for space-constrained, battery-operated, and high-accuracy measurement applications where minimal external components and guaranteed monotonicity are essential.
FAQ
What is the operating temperature range for the LTC2461CMS#PBF?
The LTC2461CMS#PBF is specified for 0°C to 70°C ambient operation (C-grade). This rating is confirmed by the "CMS" package suffix and order information table, which explicitly lists "0°C to 70°C" for all LTC2461CMS#PBF variants. The device's electrical characteristics-including reference drift (≤10ppm/°C), offset error, and supply current-are guaranteed across this full range.
Does the LTC2461CMS#PBF require an external crystal or oscillator?
No, the LTC2461CMS#PBF does not require an external crystal or oscillator. It includes a fully integrated oscillator that enables autonomous operation with no external timing components. This is confirmed in the FEATURES section ("Internal Oscillator-No External Components Required") and APPLICATIONS INFORMATION ("The LTC2461/LTC2463 include an integrated oscillator").
How does the LTC2461CMS#PBF handle power-down and wake-up sequences?
The LTC2461CMS#PBF supports two low-power states: Nap (ADC powered down, reference active) and Sleep (both ADC and reference powered down, drawing 200nA). Wake-up occurs automatically upon valid I²C address acknowledgment; the reference requires ~12ms to stabilize if previously powered down. This behavior is documented in the APPLICATIONS INFORMATION section under "Converter Operation Cycle" and "Power-Up Sequence".
Can the LTC2461CMS#PBF measure input voltages above 1.25V?
No-the LTC2461CMS#PBF's single-ended input range is strictly 0V to 1.25V, defined by its internal reference. Inputs exceeding 1.25V saturate to full-scale code (65535); inputs below 0V clamp to zero-scale (0). The datasheet explicitly states: "For applications that require an input range greater than 0V to 1.25V, please refer to the LTC2451." No internal scaling or gain adjustment is provided.
What is the I²C address configuration for the LTC2461CMS#PBF?
The LTC2461CMS#PBF supports two I²C slave addresses via the A0 pin: 0010100b (0x24) when A0 = GND, and 1010100b (0x54) when A0 = VCC. This is stated in the PIN FUNCTIONS section and confirmed in the ORDER INFORMATION table footnote. Both addresses include a read bit (R=1), resulting in 8-bit transaction addresses of 0x48 and 0xA8 respectively.
LTC2461CMS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-TSSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LTC2461CMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2461CMS#PBF 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#PBF reliable?
The price and inventory of LTC2461CMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2461CMS#PBF is usually 5 days.
3.What payment methods are accepted for LTC2461CMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2461CMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2461CMS#PBF?
LTC2461CMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2461CMS#PBF 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#PBF?
For technical support, including LTC2461CMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2461CMS#PBF requirements.
6.How does Aetrix verify that LTC2461CMS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2461CMS#PBF 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#PBF meets industry standards.
7.What is the process for return or replacement of LTC2461CMS#PBF?
All LTC2461CMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2461CMS#PBF, 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#PBF part is unused and in its original packaging.
Return procedure for LTC2461CMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2461CMS#PBF 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…
