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Analog Devices Inc. LTC2312ITS8-12#WTRPBF
- Part No.:
- LTC2312ITS8-12#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2312ITS8-12#WTRPBF.pdf
- Description:
- IC ADC 12BIT SAR TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,740
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Product details
Overview
LTC2312ITS8-12#WTRPBF from Analog Devices is a 12-bit, 500ksps successive approximation register (SAR) analog-to-digital converter in an 8-lead TSOT-23 package, operating from a single 3V or 5V supply with integrated 2.048V/4.096V low-drift reference (20ppm/°C max), delivering 72.7dB SINAD and –84dB THD at full throughput - ideal for automotive-grade data acquisition in space-constrained, low-power systems.
For engineers reviewing the LTC2312ITS8-12#WTRPBF datasheet, LTC2312ITS8-12#WTRPBF pinout, LTC2312ITS8-12#WTRPBF application, or LTC2312ITS8-12#WTRPBF equivalent, key selection considerations include guaranteed no missing codes, nap/sleep mode power management (<1µA sleep current), SPI-compatible 3-wire serial interface with 1.8V–5V OVDD compatibility, and AEC-Q100 qualification for –40°C to 85°C operation.
Technical Context
The LTC2312ITS8-12#WTRPBF implements a fully integrated SAR architecture with internal bandgap reference, reference buffer, and sample-and-hold - eliminating external reference components while maintaining ±0.3 LSB INL and ±0.2 LSB DNL over temperature. Its timing logic synchronizes conversion initiation on CONV rising edge and outputs MSB on CONV falling edge with zero-cycle latency.
Power management is handled autonomously: after each conversion, the device enters nap mode (2mA typical), and can be forced into sleep mode (<1µA) via serial command sequence. The dual-supply architecture separates analog (VDD) and digital I/O (OVDD) domains, enabling interoperability with 1.8V, 2.5V, 3.3V, or 5V host logic without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes with guaranteed no missing codes across full temperature range. |
| Sampling Rate | 500ksps - supports real-time acquisition of signals up to 250kHz Nyquist bandwidth with 2000ns minimum throughput time. |
| SINAD / SNR | 72.7dB / 73dB at 500ksps - enables high-fidelity digitization of medium-bandwidth sensor or communication signals with minimal noise floor degradation. |
| Reference Voltage | 2.048V (VDD = 2.7–3.6V) or 4.096V (VDD = 4.75–5.25V) - auto-configured internal reference eliminates external component count and reduces layout sensitivity. |
| Supply Current | 3mA at 500ksps (5V), 2mA in nap mode, <1µA in sleep mode - enables battery-operated or thermally constrained automotive subsystems. |
| Operating Temp | –40°C to +85°C - AEC-Q100 qualified for under-hood and infotainment applications requiring industrial-grade reliability. |
| Interface | SPI-compatible 3-wire (CONV/SCK/SDO) with 1.8V–5V OVDD - allows direct connection to modern microcontrollers without voltage translation. |
Pinout & Package
Package: 8-lead plastic TSOT-23 (TS8), 3.0mm × 1.6mm × 0.8mm profile, lead-free, RoHS-compliant, optimized for automated assembly and thermal performance in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Analog power supply input | Accepts 2.7–3.6V or 4.75–5.25V; powers internal reference, SAR core, and sample-and-hold - requires 2.2µF ceramic bypass to GND. |
| REF (Pin 2) | Reference input/output | Outputs 2.048V or 4.096V depending on VDD; may be overdriven externally; must be bypassed with 2.2µF low-ESR capacitor for stability. |
| GND (Pin 3) | Analog ground reference | Primary return path for analog circuitry; must connect directly to solid ground plane to minimize noise coupling into ADC core. |
| AIN (Pin 4) | Analog input | Single-ended input referenced to GND, 0V to VREF range; draws ≤1µA DC leakage and exhibits 13pF sample-mode capacitance. |
| OVDD (Pin 5) | Digital I/O supply | Supplies SDO, SCK, and CONV logic levels (1.71–5.25V); decoupled with 2.2µF ceramic capacitor - enables mixed-voltage system interfacing. |
| SDO (Pin 6) | Serial data output | Three-state output driven by OVDD; shifts out 12-bit MSB-first result with no latency; enters Hi-Z when CONV is high. |
| SCK (Pin 7) | Serial clock input | Accepts up to 20MHz clock; data valid on falling edge; timing-critical for t4 (11ns access) and t7 (1ns hold) compliance. |
| CONV (Pin 8) | Convert control input | Active-high start signal; rising edge initiates conversion; falling edge enables SDO and triggers sample mode - defines full timing sequence. |
Key Features
| Feature | Design Value |
|---|---|
| No missing codes guarantee | Ensures monotonic transfer function across full temperature range (–40°C to +85°C), critical for closed-loop control and position sensing. |
| Auto nap mode entry | Reduces average supply current to ~2mA between conversions without software intervention - simplifies power-aware firmware design. |
| Zero-cycle latency | Delivers first bit (MSB) on falling edge of CONV, enabling deterministic timing alignment in time-critical sampling applications like motor control. |
| AEC-Q100 qualification | Validated for automotive use per Grade I (–40°C to +85°C), including HTOL, ESD, and vibration testing - suitable for ADAS sensor front-ends. |
| Separate OVDD supply | Decouples digital I/O voltage from analog supply, allowing direct interface to 1.8V FPGAs or 3.3V MCUs without level shifters or additional BOM cost. |
Applications
| Automotive Sensor Interface | Portable Medical Monitoring |
|---|---|
|
Use Scenario: Digitizing analog outputs from pressure, temperature, and position sensors in engine control units and battery management systems. IC Role / Device Role / Timing Role: High-accuracy, low-latency SAR ADC providing synchronized 12-bit samples at 500ksps for real-time feedback control loops. Use Value: Integrated reference and AEC-Q100 qualification eliminate calibration overhead and reduce bill-of-materials while meeting ASIL-B functional safety requirements. |
Use Scenario: Capturing biopotential signals (ECG, EMG) in handheld diagnostic devices powered by coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: Low-power, high-SINAD ADC enabling >70dB dynamic range within strict 15mW power budget at 5V supply. Use Value: Nap/sleep modes extend battery life; 20ppm/°C reference drift ensures stable gain accuracy across clinical operating environments. |
| Industrial Data Acquisition | Communications Baseband Sampling |
|
Use Scenario: High-speed monitoring of motor phase currents, vibration spectra, and power quality metrics in PLC and gateway modules. IC Role / Device Role / Timing Role: Single-supply, SPI-compatible ADC interfacing directly to ARM Cortex-M or RISC-V SoCs via 3-wire bus. Use Value: 72.7dB SINAD and –84dB THD support accurate FFT-based spectral analysis up to 250kHz without external anti-aliasing complexity. |
Use Scenario: Digitizing IF or baseband analog waveforms in small-cell radios, IoT gateways, and software-defined radio front-ends. IC Role / Device Role / Timing Role: Medium-speed, high-linearity ADC serving as cost-optimized alternative to pipeline converters in non-5G applications. Use Value: 500ksps throughput with no cycle latency enables precise symbol timing recovery and real-time envelope detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7953IRSBT | 12-bit, 1MSPS, 16-channel multiplexed SAR ADC; requires external reference; 3.3V-only supply; SPI interface with busy indicator. | Designed for multi-sensor scanning systems; lacks integrated reference and automotive qualification. | Select when channel multiplexing and higher throughput outweigh need for reference integration and AEC-Q100 compliance. |
| MAX11100ETE+ | 12-bit, 500ksps, internal reference (2.048V), 1.8V–5.25V supply; no AEC-Q100 rating; 16-pin TQFN package. | Targeted at industrial and medical instrumentation; wider supply range but larger footprint and unqualified for automotive use. | Choose for non-automotive designs needing identical speed/reference but preferring TQFN thermal performance and availability. |
Compared with ADS7953IRSBT and MAX11100ETE+, the LTC2312ITS8-12#WTRPBF uniquely combines AEC-Q100 qualification, TSOT-23 miniaturization, and autonomous nap mode - making it the only drop-in solution for space- and reliability-constrained automotive signal chains requiring zero-latency 12-bit sampling.
Availability
LTC2312ITS8-12#WTRPBF is available at Aetrix Electronics and suitable for automotive sensor interfaces, portable medical monitors, and industrial data loggers requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LTC2312ITS8-12#WTRPBF 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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets with precision data conversion and power management solutions.
The LTC2312-12 belongs to Analog Devices' low-power, high-speed SAR ADC product line - engineered specifically for automotive and portable applications demanding integrated references, minimal board area, and guaranteed performance across extended temperature ranges.
FAQ
What is the operating temperature range for the LTC2312ITS8-12#WTRPBF?
The LTC2312ITS8-12#WTRPBF is rated for –40°C to +85°C operation and is AEC-Q100 qualified for automotive Grade I applications. All electrical specifications - including INL, DNL, SINAD, and reference drift - are guaranteed across this full range, with thermal resistance θJA = 195°C/W in the TSOT-23 package.
Does the LTC2312ITS8-12#WTRPBF require an external reference?
No, the LTC2312ITS8-12#WTRPBF integrates a precision bandgap reference and reference buffer, automatically selecting 2.048V (at 2.7–3.6V VDD) or 4.096V (at 4.75–5.25V VDD). External reference is optional via REF pin overdrive, but not required - reducing BOM count and layout sensitivity for the LTC2312ITS8-12#WTRPBF.
How does the nap mode function in the LTC2312ITS8-12#WTRPBF?
The LTC2312ITS8-12#WTRPBF automatically enters nap mode after each conversion, reducing supply current to ~2mA while retaining reference and bias circuitry active. This enables wake-up and full-accuracy conversion within one clock cycle - unlike sleep mode, which requires 1.1ms reference recovery. Nap mode is transparent to firmware and requires no configuration.
What is the maximum SCK frequency supported by the LTC2312ITS8-12#WTRPBF?
The LTC2312ITS8-12#WTRPBF supports up to 20MHz SCK frequency, with minimum SCK period of 50ns. Timing parameters t4 (11ns data access) and t7 (1ns data hold) are specified at 10pF load; loads >10pF require buffering to maintain setup/hold margins and ensure reliable 12-bit data capture from the LTC2312ITS8-12#WTRPBF.
Is the LTC2312ITS8-12#WTRPBF pin-compatible with other members of the LTC2312 family?
Yes, the LTC2312ITS8-12#WTRPBF shares identical 8-lead TSOT-23 pinout and interface protocol with all LTC2312-x variants (e.g., LTC2312-14), enabling hardware reuse across resolution grades. However, reference voltage scaling and dynamic performance differ - the LTC2312ITS8-12#WTRPBF delivers 12-bit resolution with 72.7dB SINAD, while 14-bit versions offer higher ENOB at lower speed.
LTC2312ITS8-12#WTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V, 4.75V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V, 4.75V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- TSOT-23-8
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
LTC2312ITS8-12#WTRPBF FAQ
1.How can I place an order for LTC2312ITS8-12#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2312ITS8-12#WTRPBF 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 LTC2312ITS8-12#WTRPBF reliable?
The price and inventory of LTC2312ITS8-12#WTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2312ITS8-12#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC2312ITS8-12#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2312ITS8-12#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2312ITS8-12#WTRPBF?
LTC2312ITS8-12#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2312ITS8-12#WTRPBF 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 LTC2312ITS8-12#WTRPBF?
For technical support, including LTC2312ITS8-12#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2312ITS8-12#WTRPBF requirements.
6.How does Aetrix verify that LTC2312ITS8-12#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2312ITS8-12#WTRPBF 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 LTC2312ITS8-12#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC2312ITS8-12#WTRPBF?
All LTC2312ITS8-12#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2312ITS8-12#WTRPBF, 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 LTC2312ITS8-12#WTRPBF part is unused and in its original packaging.
Return procedure for LTC2312ITS8-12#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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