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Analog Devices Inc. LTC2412IGN#PBF
- Part No.:
- LTC2412IGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC2412IGN#PBF.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:598
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Product details
Overview
LTC2412IGN#PBF from Analog Devices (formerly Linear Technology) is a 2-channel, 24-bit no-latency delta-sigma ADC with integrated oscillator, delivering 2 ppm INL, 0.16 ppm RMS noise, and 110 dB 50/60 Hz notch rejection. It operates from 2.7V to 5.5V, draws only 200 µA in conversion mode and 4 µA in autosleep, and supports differential input/reference with GND-to-VCC common-mode range - ideal for precision industrial sensor digitization.
For engineers reviewing the LTC2412IGN#PBF datasheet, LTC2412IGN#PBF pinout, LTC2412IGN#PBF application, or LTC2412IGN#PBF equivalent, key selection considerations include its dual-channel ping-pong operation, internal oscillator eliminating external timing components, flexible 3-wire SPI/MICROWIRE interface, ±0.5×VREF input range, and –40°C to +85°C industrial temperature rating.
Technical Context
The LTC2412IGN#PBF implements a third-order ∆Σ modulator with decimating FIR filter and auto-calibrating architecture that performs offset and full-scale calibration every conversion cycle. Its digital filter settles in a single cycle, enabling true no-latency output - each 32-bit result corresponds precisely to the just-completed channel conversion.
Channel selection is fully automatic: CH0 is selected at power-up, then alternates with CH1 (ping-pong), with channel ID embedded in the output data stream. The FO pin configures internal oscillator operation for 50 Hz (FO = VCC) or 60 Hz (FO = GND) line-frequency rejection, or accepts an external clock (fEOSC = 2.56–500 kHz) for user-defined notch frequency at fEOSC/2560.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit with no missing codes - guarantees monotonicity and full dynamic range utilization in high-precision measurement. |
| INL | 2 ppm of VREF - enables sub-ppm-level system accuracy without post-conversion linearization. |
| RMS Noise | 0.16 ppm (0.8 µVRMS at 5V reference) - supports >22.5 ENOB for ultra-low-noise DC measurements. |
| Supply Current | 200 µA active / 4 µA autosleep - allows battery-powered or energy-constrained designs with continuous monitoring capability. |
| Input Range | ±0.5 × VREF differential, with independent VINCM and VREFCM from GND to VCC - permits ratiometric sensing and wide common-mode flexibility. |
| Notch Rejection | ≥110 dB at 50 Hz or 60 Hz ±2% - eliminates mains interference without external filtering or software averaging. |
| Conversion Time | 130.9–163.4 ms depending on FO setting - deterministic timing enables precise synchronization in multi-device systems. |
Pinout & Package
Package: 16-lead plastic SSOP (GN), 5.0 mm × 6.2 mm, 0.635 mm pitch, RoHS-compliant lead-free finish. Thermal resistance θJA = 110°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (1) | Positive supply input | 2.7V–5.5V operation; requires local 10 µF tantalum + 0.1 µF ceramic bypass for stable low-noise performance. |
| REF+ (2), REF– (3) | Differential reference inputs | Accept 0.1V–VCC differential voltage; enable ratiometric measurement and remote sensing with independent common-mode control. |
| CH0+, CH0– (4,5) | Channel 0 differential analog inputs | Support GND-to-VCC common-mode range; full-scale input span = ±0.5×VREF - optimized for bridge sensors and strain gages. |
| CH1+, CH1– (6,7) | Channel 1 differential analog inputs | Identical electrical specs to CH0; automatic ping-pong alternation ensures synchronized dual-sensor acquisition without host intervention. |
| GND (8,9,10,15,16) | Ground terminals | Five dedicated ground pins internally connected - minimize ground bounce and improve PSRR by separating analog/digital return paths. |
| CS (11) | Active-low chip select | Wakes device from sleep (4 µA) into conversion/data mode; falling edge initiates new conversion; rising edge during data transfer aborts and restarts. |
| SDO (12) | Three-state serial data output | Outputs 32-bit conversion result (including channel ID and status bits); high-Z when CS = HIGH - enables bus sharing. |
| SCK (13) | Bidirectional serial clock | Auto-configures as output (internal SCK mode) or input (external SCK mode) based on power-up state - no register programming required. |
| FO (14) | Frequency control input | Selects internal 50 Hz (FO = VCC) or 60 Hz (FO = GND) notch; or accepts external clock for custom rejection frequency at fEOSC/2560. |
Key Features
| Feature | Design Value |
|---|---|
| No latency digital filter | Single-cycle settling delivers immediate, accurate 32-bit output - eliminates delay-induced phase errors in closed-loop control. |
| Automatic ping-pong channel switching | Hardware-managed alternation between CH0 and CH1 with embedded channel ID - reduces firmware overhead and timing jitter. |
| Integrated oscillator | Eliminates crystals, capacitors, or external clocks - simplifies BOM, improves reliability, and avoids oscillator startup delays. |
| DC common-mode rejection >140 dB | Rejects shared-mode interference (e.g., thermocouple cold-junction drift, EMI coupling) without external instrumentation amplifiers. |
| Flexible 3-wire SPI/MICROWIRE interface | Compatible with standard microcontroller peripherals; bidirectional SCK and tri-state SDO support multi-drop configurations. |
| Continuous auto-calibration | Per-conversion offset and full-scale correction - maintains accuracy across temperature, supply, and time without user intervention. |
Applications
| Weight Scales | Industrial Process Control |
|---|---|
|
Use Scenario: High-resolution load cell readout in platform scales and hopper weighing systems requiring 1:1,000,000 resolution. IC Role / Device Role: Direct digitizer for Wheatstone bridge outputs with ratiometric reference and 24-bit linearity. Use Value: 2 ppm INL and 0.16 ppm noise enable <1 µV resolution at 5V reference - sufficient for Class III/IV legal-for-trade certification. |
Use Scenario: Monitoring pressure, flow, and level transmitters in chemical plants and water treatment facilities. IC Role / Device Role: Dual-channel analog front-end acquiring sensor and reference/temperature signals simultaneously. Use Value: Ping-pong channel switching provides synchronized sampling of primary and diagnostic signals - critical for fault detection and compensation. |
| Direct Temperature Measurement | Gas Analyzers |
|
Use Scenario: Precision RTD or thermistor readout in environmental chambers and medical diagnostics equipment. IC Role / Device Role: Low-drift, low-noise ADC interfacing directly to 2-/3-/4-wire RTDs with programmable excitation current sources (external). Use Value: GND-to-VCC input common-mode range accommodates wide-span RTD biasing; 140 dB DC CMR rejects self-heating effects. |
Use Scenario: Electrochemical or NDIR gas concentration detection requiring stable, low-drift baseline tracking over hours. IC Role / Device Role: Reference-channel digitizer for optical detector and thermal compensation sensor in compact analyzer modules. Use Value: Continuous auto-calibration maintains long-term zero stability; 110 dB 50/60 Hz rejection suppresses ambient lighting and power supply interference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 24-bit delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1248IPWR | 24-bit, 2-kSPS, 4-channel, internal PGA (1–128×), but no integrated oscillator - requires external clock or crystal. | Higher speed and integrated gain support direct thermocouple/RTD conditioning; lacks automatic ping-pong channel ID. | Choose ADS1248IPWR when programmable gain and faster throughput (>10×) are needed, and external timing is acceptable. |
| MAX11206ETL+ | 24-bit, 10 SPS, single-channel, internal oscillator, 110 dB 50/60 Hz rejection - identical noise (0.16 ppm) and INL (2 ppm), but no dual-channel capability. | Optimized for single-sensor, ultra-low-power (<2 µA sleep) applications; lacks CH0/CH1 alternation and channel tagging. | Choose MAX11206ETL+ for space-constrained, single-input systems where dual-channel acquisition is unnecessary. |
Compared with ADS1248IPWR and MAX11206ETL+, the LTC2412IGN#PBF uniquely combines dual-channel ping-pong operation, embedded channel identification, and oscillator-based 50/60 Hz rejection in a single SSOP package - making it optimal for cost-sensitive, dual-sensor industrial measurement where timing simplicity and deterministic latency are critical.
Availability
LTC2412IGN#PBF is available at Aetrix Electronics and suitable for weight scales, industrial process control, and direct temperature measurement requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2412IGN#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 LTC2412IGN#PBF belongs to Linear's precision delta-sigma ADC product line, designed specifically for low-power, high-accuracy DC measurement in industrial, scientific, and instrumentation applications where noise, drift, and line-frequency interference must be minimized.
FAQ
What is the operating temperature range of the LTC2412IGN#PBF?
The LTC2412IGN#PBF is rated for –40°C to +85°C operation, as indicated by the "I" grade suffix in its part number. This industrial temperature range ensures reliable performance in demanding environments such as factory automation, outdoor instrumentation, and process control cabinets where ambient temperatures fluctuate widely. The LTC2412IGN#PBF maintains specified INL, noise, and rejection performance across this full range.
How does the FO pin configure the LTC2412IGN#PBF for 50 Hz vs 60 Hz rejection?
The FO pin selects the internal oscillator's notch frequency: tying FO to VCC configures the LTC2412IGN#PBF for 50 Hz ±2% rejection, while tying FO to GND configures it for 60 Hz ±2% rejection. This hardware-selectable mode eliminates software configuration and ensures deterministic, glitch-free line-frequency suppression - critical for compliance with IEC 61000-4-7 and EMC standards in global deployments. The LTC2412IGN#PBF achieves ≥110 dB attenuation at the selected frequency.
Does the LTC2412IGN#PBF require external calibration components or registers?
No - the LTC2412IGN#PBF performs continuous, per-conversion offset and full-scale auto-calibration using internal circuitry. There are no user-accessible registers, calibration coefficients, or external trim components required. This transparent calibration maintains accuracy over temperature, supply voltage, and time without interrupting the conversion cycle or introducing latency. All calibration is embedded within the LTC2412IGN#PBF's architecture.
What is the function of the five GND pins on the LTC2412IGN#PBF SSOP package?
The LTC2412IGN#PBF features five dedicated GND pins (8, 9, 10, 15, 16) internally connected to optimize ground current distribution and decoupling. These pins reduce ground impedance, minimize voltage drop under dynamic load, and improve PSRR and CMRR by separating analog return paths from digital switching currents. All five pins must be connected to a low-impedance ground plane - omitting any compromises noise performance and measurement stability in the LTC2412IGN#PBF.
Can the LTC2412IGN#PBF interface directly with a microcontroller SPI peripheral?
Yes - the LTC2412IGN#PBF uses a flexible 3-wire interface compatible with standard SPI and MICROWIRE protocols. SDO is a three-state output, CS is active-low chip select, and SCK operates bidirectionally (as clock output in internal mode or input in external mode). No level-shifting is needed for 2.7V–5.5V MCU I/O. The LTC2412IGN#PBF outputs 32-bit frames on SDO's falling edge, allowing robust data capture on the MCU's rising edge without additional timing constraints.
LTC2412IGN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- microPOWER™
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 7.5
- Number of Inputs:
- 2
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- MUX-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:
- 16-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2412IGN#PBF FAQ
1.How can I place an order for LTC2412IGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2412IGN#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 LTC2412IGN#PBF reliable?
The price and inventory of LTC2412IGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2412IGN#PBF is usually 5 days.
3.What payment methods are accepted for LTC2412IGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2412IGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2412IGN#PBF?
LTC2412IGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2412IGN#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 LTC2412IGN#PBF?
For technical support, including LTC2412IGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2412IGN#PBF requirements.
6.How does Aetrix verify that LTC2412IGN#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2412IGN#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 LTC2412IGN#PBF meets industry standards.
7.What is the process for return or replacement of LTC2412IGN#PBF?
All LTC2412IGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2412IGN#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 LTC2412IGN#PBF part is unused and in its original packaging.
Return procedure for LTC2412IGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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