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Analog Devices Inc. LTC2312CTS8-14#TRPBF
- Part No.:
- LTC2312CTS8-14#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2312CTS8-14#TRPBF.pdf
- Description:
- IC ADC 14BIT SAR TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,126
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Product details
Overview
LTC2312CTS8-14#TRPBF from Analog Devices (formerly Linear Technology) is a 14-bit, 500ksps successive approximation register (SAR) analog-to-digital converter in an 8-lead TSOT-23 package. It operates from a single 3V or 5V analog supply, integrates a low-drift (20ppm/°C max) internal reference (2.048V or 4.096V), and delivers 77dB SINAD and –85dB THD at full speed-enabling high-fidelity data acquisition in space-constrained, battery-powered systems such as handheld medical terminals and portable test equipment.
For engineers reviewing the LTC2312CTS8-14#TRPBF datasheet, LTC2312CTS8-14#TRPBF pinout, LTC2312CTS8-14#TRPBF application, or LTC2312CTS8-14#TRPBF equivalent, key selection criteria include guaranteed 14-bit no-missing-codes performance, nap/sleep mode power management (<1µA sleep current), SPI-compatible 3-wire serial interface with 1.8V–5V OVDD compatibility, and operation across 0°C to 70°C.
Technical Context
The LTC2312CTS8-14#TRPBF implements a fully integrated SAR architecture with on-chip sample-and-hold, bandgap reference, and reference buffer. Its conversion timing is governed by an internal oscillator, eliminating external clock dependency for the core ADC function.
It features dual power domains: VDD (2.7–3.6V or 4.75–5.25V) supplies analog circuitry including the reference, while OVDD (1.71–5.25V) independently powers digital I/O-enabling interoperability with 1.8V, 2.5V, 3.3V, or 5V host logic without level shifters. CONV-triggered conversion and SDO-driven serial output ensure zero-cycle latency and deterministic timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with guaranteed no missing codes-ensures monotonicity and full-scale linearity in precision measurement applications. |
| Sampling Rate | 500ksps maximum-supports real-time capture of signals up to ~5 MHz bandwidth (full-power bandwidth 130 MHz). |
| SINAD / SNR | 77 dB / 77.5 dBFS at 500ksps and 5V supply-enables >12.5 effective bits for high-fidelity signal digitization. |
| THD | –85 dB (first five harmonics)-minimizes harmonic distortion in audio, medical imaging, and communication baseband sampling. |
| Reference | Internal 2.048V (VDD = 2.7–3.6V) or 4.096V (VDD = 4.75–5.25V), 20ppm/°C max drift-eliminates external reference component count and thermal drift error. |
| Power Consumption | 3.2 mA at 500ksps and 3V VDD (9 mW); drops to 2 mA in nap mode and <1 µA in sleep mode-optimizes battery life in portable instrumentation. |
| Operating Temperature | 0°C to 70°C (Commercial grade)-validated for stable performance in industrial control panels and consumer-grade test gear. |
Pinout & Package
Package: 8-lead TSOT-23 (0.65 mm pitch), RoHS-compliant, lead-free finish. Compact footprint (2.9 mm × 1.6 mm × 0.8 mm) supports high-density PCB layouts in handheld and embedded systems.
| 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 2.2 µF ceramic bypass to GND. |
| REF (Pin 2) | Reference input/output | Outputs 2.048V or 4.096V internal reference; can be overdriven externally; must be bypassed with 2.2 µF low-ESR capacitor. |
| GND (Pin 3) | Analog ground | Primary return path for analog circuitry; must connect directly to solid ground plane to minimize noise coupling. |
| AIN (Pin 4) | Analog input | Single-ended input referenced to GND, range 0V to VREF; input capacitance 13 pF (sample mode), leakage ±1 µA. |
| OVDD (Pin 5) | Digital I/O supply | Supplies SDO, SCK, and CONV logic levels (1.71–5.25V); enables direct interfacing with 1.8V/2.5V/3.3V/5V microcontrollers without level translation. |
| SDO (Pin 6) | Serial data output | 3-state output; MSB-first 14-bit result + trailing zeros; driven by OVDD; enters high-Z when CONV = high. |
| SCK (Pin 7) | Serial clock input | Accepts up to 20 MHz clock; data valid on falling edge; timing critical for t4 (11 ns min access time) and t7 (1 ns hold time). |
| CONV (Pin 8) | Convert trigger input | Active-high edge-triggered start signal; initiates acquisition and conversion; controls SDO enable/disable and nap/sleep entry sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| No cycle latency serial output | Conversion result appears on SDO immediately after CONV falling edge-enables deterministic real-time processing without pipeline delay. |
| Auto nap mode activation | Device automatically enters 2 mA nap mode post-conversion-reduces average power at sub-maximum sampling rates without software intervention. |
| Separate OVDD supply | Independent 1.71–5.25V digital I/O rail allows seamless integration with mixed-voltage systems (e.g., 1.8V FPGA + 5V analog front-end). |
| Guaranteed 14-bit performance | Specified INL ±1 LSB and DNL ±0.3 LSB over temperature-ensures accuracy in closed-loop control and calibration-critical applications. |
| Low aperture jitter | 10 ps RMS-preserves SFDR (88 dB) and SNR at high input frequencies, critical for undersampling and IF digitization. |
Applications
| Handheld Medical Terminal Interface | Portable Battery-Operated Data Logger |
|---|---|
|
Use Scenario: Digitizing ECG, pulse oximetry, or temperature sensor outputs in compact clinical devices with strict size and battery life constraints. IC Role / Device Role / Timing Role: Primary 14-bit ADC capturing physiological waveforms at ≥250ksps with minimal power draw and no external reference required. Use Value: Integrated 2.048V reference and nap mode reduce BOM count and extend battery runtime beyond 12 hours per charge. |
Use Scenario: Recording environmental parameters (voltage, current, temperature) in field-deployable IoT sensors powered by coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: High-accuracy, low-quiescent-current ADC enabling long-term unattended monitoring with wake-on-event capability. Use Value: Sleep mode current <1 µA and fast wake-up (<50 ns from nap) allow microsecond-level responsiveness while maintaining multi-year battery life. |
| Industrial Motor Control Feedback | Automotive Diagnostic Tool Front-End |
|
Use Scenario: Sampling current shunt or resolver feedback signals in servo drives where DC accuracy and noise immunity are critical. IC Role / Device Role / Timing Role: Precision SAR ADC providing isolated analog feedback to MCU with guaranteed monotonicity and low offset drift (±2 LSB max). Use Value: 20ppm/°C reference drift and ±1 LSB INL ensure consistent torque control across –40°C to 70°C ambient operating range. |
Use Scenario: Capturing OBD-II bus analog diagnostics (e.g., throttle position, coolant temp) in handheld scan tools requiring rugged, low-power design. IC Role / Device Role / Timing Role: Robust ADC tolerant of automotive voltage transients (6V abs max), operating from 5V supply with integrated reference stability. Use Value: Absolute max ratings (6V supply, –0.3V to VDD+0.3V inputs) and 0°C–70°C rating align with under-hood diagnostic tool requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 14-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8860IDRCT | 16-bit resolution, 100ksps max, SPI interface, external reference required, 1.8V–3.6V supply only | Better DC accuracy but lower speed; requires external 2.5V reference and level-shifting for 5V systems | Select for ultra-high-resolution DC measurements where throughput ≤100ksps suffices and board area allows extra reference components. |
| MAX11198ETE+ | 14-bit, 500ksps, internal 2.048V reference, 2.7V–3.6V supply only, TDFN-12 package | Same speed and resolution but lacks 5V VDD support and 1.8V OVDD compatibility; larger 3mm × 3mm footprint | Choose when system uses only 3.3V rails and PCB layout accommodates TDFN-12; not suitable for 5V analog domains or 1.8V host interfaces. |
Compared with ADS8860IDRCT and MAX11198ETE+, the LTC2312CTS8-14#TRPBF uniquely combines 500ksps throughput, dual-voltage (3V/5V) analog supply support, 1.8V–5V OVDD flexibility, and integrated low-drift reference in an ultra-small TSOT-23 package-making it optimal for size- and power-constrained mixed-voltage systems.
Availability
LTC2312CTS8-14#TRPBF is available at Aetrix Electronics and suitable for handheld medical terminals, portable data loggers, industrial motor control feedback loops, and automotive diagnostic tools requiring stable component supply, commercial-grade temperature performance, and long-term production continuity.
Supply support for LTC2312CTS8-14#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, formed through the acquisition of Linear Technology in 2017.
The LTC2312-14 belongs to ADI's precision SAR ADC product line, engineered for applications demanding high speed, low power, and integrated reference functionality in minimal PCB area-targeting portable instrumentation, industrial automation, and automotive test equipment.
FAQ
What is the operating temperature range of the LTC2312CTS8-14#TRPBF?
The LTC2312CTS8-14#TRPBF is specified for commercial-grade operation from 0°C to 70°C. This range is validated for stability in applications such as handheld test equipment and consumer-grade medical devices where ambient conditions remain within controlled environments. The part's internal reference drift remains ≤20ppm/°C across this span, ensuring consistent full-scale accuracy without recalibration.
Does the LTC2312CTS8-14#TRPBF require an external reference?
No, the LTC2312CTS8-14#TRPBF integrates a factory-trimmed, low-drift reference that outputs 2.048V when VDD is 2.7–3.6V or 4.096V when VDD is 4.75–5.25V. An external reference may be applied to the REF pin if higher precision or custom voltage scaling is needed, but it is not required for standard operation-reducing BOM cost and board space.
How does the nap mode function in the LTC2312CTS8-14#TRPBF?
The LTC2312CTS8-14#TRPBF automatically enters nap mode after each conversion completes, reducing supply current from 3.2 mA to 2 mA while retaining reference and bias circuitry. This enables rapid wake-up (<50 ns) and immediate next conversion-ideal for burst-mode sampling. Nap mode requires no software command and is inherent to the device's power management architecture.
Can the LTC2312CTS8-14#TRPBF interface directly with a 1.8V microcontroller?
Yes, the LTC2312CTS8-14#TRPBF supports 1.8V digital I/O via its dedicated OVDD pin (1.71–5.25V range). When OVDD = 1.8V, SDO output levels and SCK/CONV input thresholds comply with 1.8V logic standards-enabling direct connection to 1.8V FPGAs or MCUs without level shifters, preserving signal integrity and simplifying layout.
What is the minimum acquisition time for the LTC2312CTS8-14#TRPBF at full speed?
The minimum acquisition time (tACQ) for the LTC2312CTS8-14#TRPBF is 700 ns at 500ksps. This value assumes optimal driving conditions: low-source-impedance analog input and proper 2.2 µF REF bypass. Exceeding this time degrades settling and may reduce effective resolution; for high-impedance sources, a buffer amplifier (e.g., LT6230) is recommended to meet the 700 ns requirement.
LTC2312CTS8-14#TRPBF 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:
- 14
- 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, 5V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V, 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- TSOT-23-8
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2312CTS8-14#TRPBF FAQ
1.How can I place an order for LTC2312CTS8-14#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2312CTS8-14#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 LTC2312CTS8-14#TRPBF reliable?
The price and inventory of LTC2312CTS8-14#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2312CTS8-14#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2312CTS8-14#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2312CTS8-14#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2312CTS8-14#TRPBF?
LTC2312CTS8-14#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2312CTS8-14#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 LTC2312CTS8-14#TRPBF?
For technical support, including LTC2312CTS8-14#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2312CTS8-14#TRPBF requirements.
6.How does Aetrix verify that LTC2312CTS8-14#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2312CTS8-14#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 LTC2312CTS8-14#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2312CTS8-14#TRPBF?
All LTC2312CTS8-14#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2312CTS8-14#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 LTC2312CTS8-14#TRPBF part is unused and in its original packaging.
Return procedure for LTC2312CTS8-14#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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