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Analog Devices Inc. LTC2312HTS8-12#PBF
- Part No.:
- LTC2312HTS8-12#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2312HTS8-12#PBF.pdf
- Description:
- LTC2312HTS8-12#PBF
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC2312HTS8-12#PBF 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), 72.7dB SINAD, and –84dB THD - deployed in high-speed automotive data acquisition and battery-powered medical sensors.
For engineers reviewing the LTC2312HTS8-12#PBF datasheet, LTC2312HTS8-12#PBF pinout, LTC2312HTS8-12#PBF application, or LTC2312HTS8-12#PBF equivalent, key selection criteria include guaranteed 12-bit no-missing-codes operation across –40°C to 125°C, 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 under-hood automotive use.
Technical Context
The LTC2312HTS8-12#PBF implements a fully integrated SAR architecture with internal bandgap reference, reference buffer, and sample-and-hold - eliminating external reference components while maintaining 73dB SNR at 500ksps. Its timing logic synchronizes conversion start on CONV rising edge and outputs MSB on CONV falling edge with zero-cycle latency.
It supports dual supply domains: VDD (2.7–3.6V or 4.75–5.25V) powers analog circuitry and reference, while OVDD (1.71–5.25V) independently sets digital I/O voltage levels - enabling direct interfacing with 1.8V microcontrollers or 5V FPGAs without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with guaranteed no missing codes over full temperature range - ensures monotonicity and deterministic code mapping in closed-loop control. |
| Sampling Rate | 500ksps maximum - enables real-time capture of signals up to 250kHz Nyquist bandwidth for motor phase current or vibration monitoring. |
| SINAD / SNR | 72.7dB / 73dB at 500ksps, 5V - delivers >11.8 effective bits for precision sensor digitization in noisy automotive environments. |
| Reference Drift | 20ppm/°C max - maintains ±0.25% full-scale accuracy from –40°C to 125°C without calibration, critical for engine control unit (ECU) analog front-ends. |
| Power Consumption | 15mW at 5V/500ksps; <1µA in sleep mode - supports ultra-low-power wake-on-event architectures in telematics and ADAS subsystems. |
| Operating Temperature | –40°C to 125°C (H-grade) - qualified per AEC-Q100 Grade 0 - suitable for under-hood placement without derating. |
| Digital Interface | SPI-compatible 3-wire (CONV/SCK/SDO), OVDD-referenced - eliminates level-shifter requirements when interfacing with 1.8V/2.5V/3.3V/5V host processors. |
Pinout & Package
Package: 8-lead TSOT-23 (3.0mm × 1.6mm × 0.8mm), RoHS-compliant, lead-free finish (#PBF). Thermal resistance θJA = 195°C/W; TJMAX = 150°C.
| 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 (at 3V VDD) or 4.096V (at 5V VDD); may be overdriven externally; bypassed with 2.2µF capacitor for stability. |
| GND (Pin 3) | Analog ground reference | Must connect directly to solid ground plane - separates analog return path from digital noise sources. |
| AIN (Pin 4) | Analog input | Single-ended, 0V to VREF range; input capacitance 13pF (sample mode); draws ≤1µA DC leakage - compatible with op-amp buffers like LT6230. |
| OVDD (Pin 5) | Digital I/O supply | 1.71–5.25V supply setting SDO/CONV/SCK logic levels - enables direct interface with mixed-voltage systems without level translation. |
| SDO (Pin 6) | Serial data output | Three-state output; MSB-first 12-bit stream with trailing zeros; high-impedance when CONV = high - timing-critical for SCK falling-edge sampling. |
| SCK (Pin 7) | Serial clock input | Accepts up to 20MHz clock; defines data transfer rate; logic thresholds referenced to OVDD - must remain static during tCONV (1400ns). |
| CONV (Pin 8) | Convert control input | Active-high start signal; rising edge initiates conversion; falling edge enables SDO and places S/H into sample mode - controls nap/sleep entry via pulse count. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for automotive under-hood operation (–40°C to 125°C) with extended reliability testing - meets ISO/TS 16949 manufacturing requirements. |
| No-cycle latency serial output | MSB appears on SDO within 10ns after CONV falling edge; remaining bits clocked on SCK falling edges - enables deterministic real-time processing in motor control loops. |
| Auto nap mode activation | Enters 2mA nap mode automatically after each conversion - reduces average power by >50% at 100ksps vs. continuous operation. |
| Separate OVDD supply | Independent 1.71–5.25V digital I/O rail decouples ADC timing from host processor voltage - prevents logic-level mismatch in heterogeneous SoC interfaces. |
| Internal reference buffer | Eliminates need for external reference IC or buffer op-amp; provides 2.048V/4.096V with 7ppm/°C typical drift - saves PCB area and BOM cost in space-constrained modules. |
Applications
| Automotive Engine Control | Portable Medical Sensors |
|---|---|
|
Use Scenario: Digitizing cylinder pressure, throttle position, and exhaust gas oxygen signals in ECU modules. IC Role / Device Role / Timing Role: High-speed, temperature-stable ADC capturing transient combustion events at 500ksps with minimal latency. Use Value: AEC-Q100 qualification and 20ppm/°C reference drift ensure consistent measurement accuracy across engine thermal cycles without recalibration. |
Use Scenario: Converting biopotential signals (ECG, EMG) in handheld diagnostic devices powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-power 12-bit SAR ADC enabling multi-hour operation via <1µA sleep current and fast wake-up from nap mode. Use Value: Integrated reference and 15mW active power allow elimination of discrete reference and LDO, reducing solution size by >30%. |
| Industrial Motor Drive Feedback | Uninterruptible Power Supply Monitoring |
|
Use Scenario: Sampling phase currents and DC-link voltage in compact servo drives for robotics and CNC equipment. IC Role / Device Role / Timing Role: Precision ADC with 72.7dB SINAD and no missing codes ensuring accurate field-oriented control (FOC) vector calculations. Use Value: 500ksps throughput and zero-cycle latency support 20kHz PWM switching frequencies with synchronized current sampling. |
Use Scenario: Monitoring battery voltage, load current, and inverter output in line-interactive UPS units requiring high reliability. IC Role / Device Role / Timing Role: Robust ADC operating continuously across wide temperature and supply ranges with built-in reference stability. Use Value: 125°C operation and 2.2µF REF bypass tolerance enable reliable performance during sustained overload conditions without thermal shutdown. |
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 |
|---|---|---|---|
| ADS7953IRSLR | 12-bit, 1MSPS, SPI interface, but requires external reference and separate AVDD/DVDD supplies; no integrated reference buffer. | Higher speed but larger footprint (16-pin QFN); lacks AEC-Q100 qualification and automotive temperature range. | Select when >500ksps is required and external reference design is acceptable; avoid for space-constrained automotive modules. |
| MAX11192ETE+ | 12-bit, 500ksps, internal reference (2.048V only), but rated only to 85°C (I-grade); no AEC-Q100 certification. | Lower cost, but unsuitable for under-hood deployment; sleep current 2µA vs. LTC2312HTS8-12#PBF's 0.2µA typical. | Consider for industrial or consumer applications where ambient temperature stays below 85°C and automotive qualification is unnecessary. |
Compared with ADS7953IRSLR and MAX11192ETE+, the LTC2312HTS8-12#PBF uniquely combines AEC-Q100 Grade 0 qualification, integrated dual-range reference, and sub-1µA sleep current in an 8-pin TSOT-23 - making it the only drop-in option for thermally demanding automotive signal chains requiring minimal BOM count.
Availability
LTC2312HTS8-12#PBF is available at Aetrix Electronics and suitable for automotive engine control units, portable medical diagnostics, industrial motor feedback systems, and uninterruptible power supply monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2312HTS8-12#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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The LTC2312 family was designed specifically for compact, low-power, high-speed data acquisition in harsh environments - emphasizing integrated references, wide supply flexibility, and automotive-grade reliability without sacrificing AC performance.
FAQ
What is the operating temperature range for the LTC2312HTS8-12#PBF?
The LTC2312HTS8-12#PBF is specified for continuous operation from –40°C to 125°C and is AEC-Q100 Grade 0 qualified. This rating is confirmed in the Absolute Maximum Ratings table and supported by thermal characterization (θJA = 195°C/W, TJMAX = 150°C). The device maintains full 12-bit no-missing-codes performance and 20ppm/°C reference drift across this entire range - making it suitable for under-hood automotive placement without derating. The "H" suffix explicitly denotes this high-temperature grade.
Does the LTC2312HTS8-12#PBF require an external reference?
No, the LTC2312HTS8-12#PBF does not require an external reference. It integrates a low-drift bandgap reference and reference buffer that automatically outputs 2.048V when VDD is in the 2.7–3.6V range or 4.096V when VDD is in the 4.75–5.25V range. The REF pin functions as both output and overvoltage input (≥50mV above internal VREF), and must be bypassed with a 2.2µF ceramic capacitor. This integration eliminates external reference components and associated layout sensitivity, reducing BOM count and board area.
How does the nap mode function in the LTC2312HTS8-12#PBF?
The LTC2312HTS8-12#PBF enters nap mode automatically after each conversion cycle, reducing supply current from 3mA to ~2mA. Nap mode retains biasing of the internal bandgap and reference buffer, enabling wake-up and valid conversion within one acquisition time (600ns). It is distinct from sleep mode (entered via four CONV pulses), which shuts down all bias circuitry and draws <1µA but requires 1.1ms reference recovery. Nap mode is ideal for burst-mode acquisition at variable rates below 500ksps, delivering significant power savings without latency penalty.
Can the LTC2312HTS8-12#PBF interface directly with a 1.8V microcontroller?
Yes, the LTC2312HTS8-12#PBF can interface directly with a 1.8V microcontroller using its dedicated OVDD pin (Pin 5), which accepts 1.71–5.25V. When OVDD = 1.8V, the SDO output high level is ≥1.6V, CONV/SCK input high threshold is ≥1.44V, and logic levels are fully compatible - eliminating level shifters. The analog domain (VDD) remains independent (3V or 5V), preserving SNR and reference accuracy while enabling seamless digital interoperability with low-voltage hosts.
What is the significance of the "#PBF" suffix in LTC2312HTS8-12#PBF?
The "#PBF" suffix in LTC2312HTS8-12#PBF indicates a lead-free, RoHS-compliant finish with matte tin plating over nickel palladium gold (NiPdAu) underplate. It confirms compliance with JEDEC J-STD-020 moisture sensitivity level 1 (unlimited floor life at ≤30°C/85% RH) and IPC/JEDEC J-STD-002B solderability standards. This suffix is used for standard commercial/reel packaging (e.g., #TRPBF) and distinguishes it from lead-based alternatives - critical for automotive and medical manufacturing traceability and environmental compliance.
LTC2312HTS8-12#PBF 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:
- External, 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 ~ 125°C
- Supplier Device Package:
- TSOT-23-8
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
LTC2312HTS8-12#PBF FAQ
1.How can I place an order for LTC2312HTS8-12#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2312HTS8-12#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 LTC2312HTS8-12#PBF reliable?
The price and inventory of LTC2312HTS8-12#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2312HTS8-12#PBF is usually 5 days.
3.What payment methods are accepted for LTC2312HTS8-12#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2312HTS8-12#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2312HTS8-12#PBF?
LTC2312HTS8-12#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2312HTS8-12#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 LTC2312HTS8-12#PBF?
For technical support, including LTC2312HTS8-12#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2312HTS8-12#PBF requirements.
6.How does Aetrix verify that LTC2312HTS8-12#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2312HTS8-12#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 LTC2312HTS8-12#PBF meets industry standards.
7.What is the process for return or replacement of LTC2312HTS8-12#PBF?
All LTC2312HTS8-12#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2312HTS8-12#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 LTC2312HTS8-12#PBF part is unused and in its original packaging.
Return procedure for LTC2312HTS8-12#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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