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Analog Devices Inc. LTC2412IGN#TRPBF
- Part No.:
- LTC2412IGN#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC2412IGN#TRPBF.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,230
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Product details
Overview
LTC2412IGN#TRPBF from Analog Devices (formerly Linear Technology) is a 2-channel, 24-bit no-latency delta-sigma ADC with integrated oscillator, 2 ppm INL, 0.16 ppm RMS noise, and differential input/reference support across GND to VCC common-mode range. It operates from 2.7V to 5.5V and delivers 110 dB line-frequency rejection at 50/60 Hz for precision sensor digitization in industrial instrumentation.
For engineers reviewing the LTC2412IGN#TRPBF datasheet, LTC2412IGN#TRPBF pinout, LTC2412IGN#TRPBF application, or LTC2412IGN#TRPBF equivalent, key selection criteria include its ping-pong dual-channel auto-selection, internal oscillator eliminating external timing components, 24-bit no-missing-codes resolution, differential reference flexibility (0.1V–VCC), and guaranteed DC common-mode rejection >140 dB.
Technical Context
The LTC2412IGN#TRPBF implements a third-order ∆Σ modulator with decimating FIR filter and on-chip autocalibration running every conversion cycle. Its digital filter settles in a single cycle-enabling true no-latency operation where output data corresponds precisely to the just-completed conversion.
Channel selection is fully automatic: CH0 is selected at power-up, then alternates (ping-pong) between CH0 and CH1 with channel ID embedded in each 32-bit output word. The FO pin configures notch frequency (50 Hz when tied to VCC, 60 Hz when tied to GND) or accepts external clock (2.56–500 kHz) for user-defined rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit with no missing codes-guarantees monotonicity and full dynamic range utilization for high-precision measurement systems. |
| INL | 2 ppm of VREF-enables sub-1 ppm system-level accuracy after calibration in 6½-digit DVM and strain-gage applications. |
| RMS Noise | 0.16 ppm (0.8 µVRMS at 5V reference)-supports 22.5 ENOB and resolves microvolt-level signals in low-drift temperature sensing. |
| Supply Current | 200 µA in conversion mode, 4 µA in autosleep-enables battery-powered portable instrumentation with multi-year runtime. |
| Common-Mode Rejection | >140 dB DC-rejects ground loop errors and enables direct connection to floating sensors without level-shifting circuitry. |
| Line Rejection | 110 dB min at 50/60 Hz ±2%-eliminates need for external analog notch filters in AC-coupled industrial environments. |
| Reference Range | 0.1 V to VCC differential-allows ratiometric sensing with any stable reference, including low-voltage bandgap or remote sense configurations. |
Pinout & Package
Package: 16-lead plastic SSOP (GN), 5.0 mm × 6.2 mm, 0.635 mm pitch, RoHS-compliant, rated for –40°C to +85°C operating temperature.
| 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 conversion performance. |
| REF+ (2), REF– (3) | Differential reference inputs | Accept 0.1V–VCC differential voltage; enable flexible ratiometric and remote sensing topologies with independent common-mode setting. |
| CH0+, CH0– (4,5) | Channel 0 differential inputs | Full-scale range = ±0.5×VREF; support direct connection to bridge transducers or thermocouples without gain/level-shift stages. |
| CH1+, CH1– (6,7) | Channel 1 differential inputs | Identical electrical specs to CH0; automatically alternated with CH0 for dual-sensor monitoring without external multiplexer control. |
| GND (8,9,10,15,16) | Ground terminals | Five dedicated pins internally connected-must all be tied to low-impedance ground plane to minimize noise coupling and ensure specified PSRR. |
| CS (11) | Active-low chip select | Wakes device from sleep (4 µA); initiates data output; HIGH = autosleep; LOW-to-HIGH during transfer aborts readout and starts new conversion. |
| SDO (12) | Three-state serial data output | Outputs 32-bit conversion result (including channel ID and sign bit); Hi-Z when CS = HIGH; status indicator during conversion/sleep. |
| SCK (13) | Bidirectional serial clock | Auto-configured at power-up: outputs internal clock (19.2 kHz) or accepts external clock (2–2000 kHz) based on SCK pin state at CS falling edge. |
| FO (14) | Frequency control input | Selects internal 50 Hz (FO = VCC) or 60 Hz (FO = GND) notch; or accepts external oscillator (2.56–500 kHz) for custom rejection frequency fEOSC/2560. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency conversion | Digital filter settles in one cycle-output data is always valid for the most recent conversion, enabling real-time closed-loop control without pipeline delay. |
| Ping-pong dual-channel operation | Automatic alternating conversion between CH0 and CH1 with embedded channel ID-reduces firmware overhead and eliminates external MUX timing complexity. |
| Integrated oscillator | No external crystal, capacitor, or resistor required-simplifies BOM, reduces board area, and improves long-term stability vs. discrete timing components. |
| GND-to-VCC input common-mode range | Both inputs and reference can operate anywhere from ground to supply-enables direct interface to unbuffered sensors, thermocouples, and strain gages without rail-to-rail op-amps. |
| Per-conversion autocalibration | Offset and full-scale corrections applied every cycle-maintains accuracy over temperature and time without requiring user-initiated recalibration sequences. |
Applications
| Weight Scales | Direct Temperature Measurement |
|---|---|
Use Scenario: High-resolution load cell readout in commercial and industrial weighing systems with 20,000+ count resolution. IC Role / Device Role / Timing Role: Direct digitizer for Wheatstone bridge outputs; provides 24-bit resolution and 2 ppm INL to resolve sub-gram changes at full scale. Use Value: Eliminates need for external PGA and analog filtering; 0.16 ppm RMS noise ensures stable display updates without dithering or averaging artifacts. | Use Scenario: Precision RTD or thermistor readout in HVAC controllers, medical thermometers, and environmental monitors. IC Role / Device Role / Timing Role: Ratiometric ADC with programmable reference; supports 4-wire RTD configurations using internal reference and differential inputs. Use Value: >140 dB DC common-mode rejection rejects lead resistance errors; 24-bit resolution enables <0.01°C temperature resolution over wide ranges. |
| Gas Analyzers | Industrial Process Control |
Use Scenario: Electrochemical or NDIR sensor signal conditioning in portable and fixed gas detection equipment. IC Role / Device Role / Timing Role: Low-power, high-accuracy front-end for microamp-level sensor currents converted via precision shunt resistors. Use Value: 4 µA autosleep current extends battery life; 110 dB 50/60 Hz rejection prevents interference from mains-powered lab equipment. | Use Scenario: Analog input module for PLCs and distributed I/O systems measuring pressure, flow, and level transmitters. IC Role / Device Role / Timing Role: Dual-channel simultaneous sampling alternative (via ping-pong sequencing) for redundant sensor validation and fault detection. Use Value: Embedded channel ID and no-latency output simplify firmware synchronization; SSOP package supports compact DIN-rail mounting. |
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 |
|---|---|---|---|
| ADS124S08IPWR | 24-bit, 4-kSPS, integrated PGA and burn-out current sources; SPI interface only; no internal oscillator; requires external clock or crystal. | Optimized for RTD/thermocouple with built-in excitation; less suitable for ultra-low-noise bridge applications without external filtering. | Choose ADS124S08IPWR when PGA gain, sensor excitation, or higher throughput (>7.5 Hz) is required; LTC2412IGN#TRPBF preferred for lowest noise, lowest power, and oscillator-free design. |
| MAX11206ETL+ | 24-bit, 10 Hz output rate, internal oscillator, but single-channel; 16-pin TQFN; 130 dB 50/60 Hz rejection; 0.25 ppm RMS noise. | Lacks dual-channel ping-pong capability; smaller footprint but no CH1 for redundancy or multi-sensor use. | Choose MAX11206ETL+ for space-constrained single-sensor designs where 0.25 ppm noise is acceptable; LTC2412IGN#TRPBF required for dual-channel, 0.16 ppm noise, and guaranteed 110 dB rejection. |
Compared with ADS124S08IPWR and MAX11206ETL+, the LTC2412IGN#TRPBF uniquely combines dual-channel ping-pong operation, 0.16 ppm RMS noise, internal oscillator, and >140 dB DC common-mode rejection-making it optimal for battery-powered, high-accuracy, two-sensor measurement systems where layout simplicity and long-term stability are critical.
Availability
LTC2412IGN#TRPBF is available at Aetrix Electronics and suitable for weight scales, gas analyzers, and industrial process control systems requiring stable component supply, extended temperature operation (–40°C to +85°C), and long-lifecycle availability.
Supply support for LTC2412IGN#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 LTC2412IGN#TRPBF belongs to ADI's legacy Linear Technology precision ADC product line, designed specifically for ultra-low-noise, micropower, direct-sensor-digitization applications demanding 24-bit accuracy without latency or external timing components.
FAQ
What is the operating temperature range for the LTC2412IGN#TRPBF?
The LTC2412IGN#TRPBF is specified for operation from –40°C to +85°C, denoted by the "I" grade in the part number. This extended industrial temperature range ensures reliable performance in harsh environments such as factory floors, outdoor instrumentation, and automotive under-hood modules. All key specifications-including INL, noise, and common-mode rejection-are guaranteed across this full range.
How does the FO pin affect the LTC2412IGN#TRPBF's line-frequency rejection?
The FO pin configures the LTC2412IGN#TRPBF's digital filter null: tying FO to VCC selects 50 Hz rejection, tying FO to GND selects 60 Hz rejection, and driving FO with an external clock (2.56–500 kHz) sets rejection at fEOSC/2560. This allows precise matching to regional mains frequencies without hardware changes. The LTC2412IGN#TRPBF achieves ≥110 dB rejection at the selected frequency, eliminating need for external analog filtering.
Does the LTC2412IGN#TRPBF require external components for its oscillator function?
No, the LTC2412IGN#TRPBF includes a fully integrated, factory-trimmed oscillator that requires no external capacitors, crystals, or resistors. When FO is tied to VCC or GND, the internal oscillator automatically generates the precise clock needed for 50 Hz or 60 Hz notch filtering. This simplifies design, reduces BOM cost, and improves long-term frequency stability compared to discrete oscillator solutions.
What is the significance of the "no latency" feature in the LTC2412IGN#TRPBF?
"No latency" means the LTC2412IGN#TRPBF's digital filter settles in a single conversion cycle-so the 32-bit output word corresponds exactly to the most recently completed conversion, with no pipeline delay or redundant samples. This enables deterministic real-time response in closed-loop systems and eliminates the need for output buffering or frame synchronization logic in firmware.
Can the LTC2412IGN#TRPBF interface directly with a microcontroller SPI port?
Yes, the LTC2412IGN#TRPBF uses a flexible 3-wire interface compatible with standard SPI and MICROWIRE protocols. Its SDO is three-state, CS is active-low, and SCK operates bidirectionally-supporting both internal clock output (for MCU GPIO capture) and external clock input (for synchronous SPI master operation). No level shifters are needed for 2.7V–5.5V MCU interfaces.
LTC2412IGN#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- microPOWER™
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LTC2412IGN#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2412IGN#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 LTC2412IGN#TRPBF reliable?
The price and inventory of LTC2412IGN#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2412IGN#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2412IGN#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2412IGN#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2412IGN#TRPBF?
LTC2412IGN#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2412IGN#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 LTC2412IGN#TRPBF?
For technical support, including LTC2412IGN#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2412IGN#TRPBF requirements.
6.How does Aetrix verify that LTC2412IGN#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2412IGN#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 LTC2412IGN#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2412IGN#TRPBF?
All LTC2412IGN#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2412IGN#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 LTC2412IGN#TRPBF part is unused and in its original packaging.
Return procedure for LTC2412IGN#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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