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Analog Devices Inc. LTC2312HTS8-14#TRPBF
- Part No.:
- LTC2312HTS8-14#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2312HTS8-14#TRPBF.pdf
- Description:
- IC ADC 14BIT SAR TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,536
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Product details
Overview
LTC2312HTS8-14#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, operating from a single 3V or 5V supply with integrated 2.048V/4.096V reference and reference buffer. It delivers 77dB SINAD, –85dB THD, and 77.5dB SNR at full throughput while consuming only 9mW (3V) or 15mW (5V), enabling high-speed data acquisition in space-constrained, low-power systems such as handheld medical terminals and automotive sensor interfaces.
For engineers reviewing the LTC2312HTS8-14#TRPBF datasheet, LTC2312HTS8-14#TRPBF pinout, LTC2312HTS8-14#TRPBF application, or LTC2312HTS8-14#TRPBF equivalent, key selection considerations include guaranteed 14-bit no-missing-codes performance across –40°C to 125°C, SPI-compatible 3-wire serial interface with 1.8V–5V OVDD compatibility, nap/sleep power management modes, and internal reference drift ≤20ppm/°C.
Technical Context
The LTC2312HTS8-14#TRPBF implements a fully integrated SAR architecture with on-chip sample-and-hold, bandgap-based voltage reference, and low-drift reference buffer-automatically selecting 2.048V output for VDD = 2.7–3.6V or 4.096V for VDD = 4.75–5.25V. Its timing logic synchronizes conversion initiation via rising-edge-triggered CONV input and outputs 14-bit MSB-first serial data on SDO with zero-cycle latency.
It supports dual-supply operation: VDD powers analog circuitry (2.7–3.6V or 4.75–5.25V), while OVDD independently supplies digital I/O (1.71–5.25V), enabling interoperability with 1.8V, 2.5V, 3.3V, or 5V host processors. Power states are managed autonomously-entering nap mode post-conversion (2mA typical) or sleep mode via serial command (<1µA typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with guaranteed no missing codes over full temperature range (–40°C to 125°C) |
| Sampling Rate | 500ksps maximum-enables real-time capture of signals up to 250kHz Nyquist bandwidth |
| SINAD / SNR | 77dB / 77.5dBFS at fIN = 259kHz, VDD = 5V-supports high-fidelity signal digitization in medical imaging and comms |
| THD | –85dB (first five harmonics)-minimizes harmonic distortion in precision measurement applications |
| Reference Drift | ≤20ppm/°C-ensures stable full-scale accuracy without external calibration over industrial temperature range |
| Power Consumption | 9mW @ 3V / 15mW @ 5V at 500ksps-enables battery-operated designs with >10-hour runtime at 3V |
| Supply Flexibility | VDD: 2.7–3.6V or 4.75–5.25V; OVDD: 1.71–5.25V-eliminates level-shifting components in mixed-voltage systems |
Pinout & Package
Package: 8-lead TSOT-23 (0.65mm pitch), thermally enhanced plastic surface-mount package with θJA = 195°C/W, rated for operation from –40°C to 125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Analog power supply input | Accepts 2.7–3.6V or 4.75–5.25V; requires 2.2µF ceramic bypass to GND for noise suppression |
| REF (Pin 2) | Reference input/output | Outputs 2.048V (low-VDD) or 4.096V (high-VDD); may be overdriven externally ≥50mV above internal value |
| GND (Pin 3) | Analog ground reference | Mandatory low-impedance connection to solid ground plane; separates analog return from digital return paths |
| AIN (Pin 4) | Analog input | Single-ended, 0V to VREF range; draws ≤1µA DC leakage; input capacitance = 13pF (sample), 3pF (hold) |
| OVDD (Pin 5) | Digital I/O supply | Defines SDO/SCK/CONV logic levels (1.71–5.25V); enables direct interfacing with 1.8V/2.5V/3.3V/5V controllers |
| SDO (Pin 6) | Serial data output | Three-state MSB-first 14-bit stream; enters Hi-Z when CONV = high; t4 = 11ns data valid after SCK↓ |
| SCK (Pin 7) | Serial clock input | Accepts up to 20MHz clock; data latched on falling edge; t5/t6 ≥10ns low/high time required |
| CONV (Pin 8) | Convert trigger input | Rising edge initiates conversion; falling edge enables SDO and places S/H into sample mode; t1 ≥10ns pulse width |
Key Features
| Feature | Design Value |
|---|---|
| No cycle latency serial output | MSB appears on SDO within 10ns of CONV↓-enables deterministic real-time control loop response |
| Auto nap mode entry | Enters 2mA low-power state automatically after conversion completes-reduces average power by >50% at <250ksps |
| Wide OVDD interface range | 1.71–5.25V digital supply-allows direct connection to FPGA I/O banks, microcontroller GPIO, or ASIC logic without level shifters |
| Internal reference with low drift | 20ppm/°C max drift over –40°C to 125°C-avoids external reference cost, board area, and thermal mismatch errors |
| Guaranteed operation at 125°C | Specified and tested across –40°C to 125°C junction temperature-qualified for under-hood automotive and industrial motor control |
| Low acquisition time | tACQ = 700ns minimum-supports full 500ksps throughput even with moderate source impedances (<1kΩ) |
Applications
| Medical Handheld Terminals | Automotive Sensor Interfaces |
|---|---|
|
Use Scenario: Portable ECG or blood glucose monitor acquiring analog biosignals in battery-powered enclosure. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog front-end signals with minimal latency and power. Use Value: 77.5dB SNR ensures accurate amplitude resolution of microvolt-level biopotentials; 9mW @ 3V extends battery life beyond 12 hours. |
Use Scenario: Engine control unit sampling crankshaft position, throttle angle, and exhaust gas oxygen sensors. IC Role / Device Role / Timing Role: High-reliability ADC capturing critical engine parameters in harsh under-hood environments. Use Value: Guaranteed operation to 125°C and ≤20ppm/°C reference drift maintain calibration stability across thermal cycles. |
| Industrial Data Acquisition Modules | Uninterruptible Power Supplies (UPS) |
|
Use Scenario: DIN-rail mounted PLC module monitoring AC line voltage, current, and temperature in factory automation. IC Role / Device Role / Timing Role: Precision ADC feeding isolated communication interface for cloud-connected monitoring. Use Value: 500ksps throughput captures transient grid events (e.g., sags, surges); SPI interface simplifies isolation barrier design. |
Use Scenario: Online UPS system continuously monitoring battery voltage, inverter output waveform, and load current. IC Role / Device Role / Timing Role: Real-time ADC supporting fast feedback loops for PWM inverter control and battery health estimation. Use Value: Zero-cycle latency enables sub-microsecond response to overvoltage/overcurrent faults; nap mode reduces standby power. |
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, 1MSPS, SPI interface, external reference required, 1.8V–3.6V supply only | Higher resolution but lacks integrated reference and industrial temp grade; requires external ref and level-shifting for 5V systems | Select when 16-bit resolution and 1MSPS are mandatory, and system can accommodate external reference and tighter supply constraints. |
| MAX11198ETE+ | 14-bit, 500ksps, internal 2.048V ref, –40°C to 105°C rating, 3.0V–5.25V supply | Same speed/resolution but limited to 105°C max; no 4.096V reference option; higher THD (–78dB) | Consider for cost-sensitive industrial applications where 125°C operation is not required and THD > –80dB is acceptable. |
Compared with ADS8860IDRCT and MAX11198ETE+, the LTC2312HTS8-14#TRPBF uniquely combines 125°C operation, dual-reference-voltage auto-selection (2.048V/4.096V), and –85dB THD in a TSOT-23 package-making it optimal for automotive and extended-temperature embedded systems requiring minimal BOM count and thermal robustness.
Availability
LTC2312HTS8-14#TRPBF is available at Aetrix Electronics and suitable for medical handheld terminals, automotive sensor interfaces, industrial data acquisition modules, and uninterruptible power supplies requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2312HTS8-14#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2312HTS8-14#TRPBF belongs to the LTC2312 family of ultra-low-power, high-speed SAR ADCs designed specifically for compact, battery-operated, and thermally demanding applications where integration, accuracy, and reliability are critical.
FAQ
What is the operating temperature range of the LTC2312HTS8-14#TRPBF?
The LTC2312HTS8-14#TRPBF is specified and tested for continuous operation from –40°C to +125°C ambient temperature, with junction temperature (TJ) up to 150°C. This H-grade qualification makes it suitable for under-hood automotive, industrial motor drives, and outdoor infrastructure applications where extreme thermal conditions are expected. The device maintains full parametric performance-including INL, DNL, SINAD, and reference drift-across this entire range.
Does the LTC2312HTS8-14#TRPBF require an external reference?
No, the LTC2312HTS8-14#TRPBF integrates a precision, low-drift voltage reference and reference buffer. It 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. An external reference may be applied to the REF pin if needed, provided it exceeds the internal reference voltage by at least 50mV-but the internal reference eliminates BOM cost, board area, and thermal drift concerns in most designs.
How does the nap mode function in the LTC2312HTS8-14#TRPBF?
The LTC2312HTS8-14#TRPBF automatically enters nap mode after each conversion completes, reducing supply current from 3.2mA (active) to ~2mA while retaining full reference and bias circuitry. This allows wake-up and accurate conversion within one acquisition cycle (700ns). Nap mode is ideal for burst-mode sampling at rates below 500ksps, delivering significant average power savings without sacrificing startup time or accuracy-unlike sleep mode, which requires 1.1ms recovery.
Can the LTC2312HTS8-14#TRPBF interface directly with a 1.8V microcontroller?
Yes-the LTC2312HTS8-14#TRPBF features a dedicated OVDD pin supporting 1.71V to 5.25V, allowing its SDO, SCK, and CONV pins to operate at 1.8V logic levels without external level shifters. When OVDD = 1.8V, VIH = 1.44V and VIL = 0.36V, ensuring reliable interfacing with 1.8V FPGAs, ARM Cortex-M0+ MCUs, and low-voltage ASICs while maintaining full 500ksps throughput and timing compliance.
What is the minimum acquisition time required for full 14-bit accuracy with the LTC2312HTS8-14#TRPBF?
The minimum acquisition time (tACQ) for the LTC2312HTS8-14#TRPBF is 700ns, verified across –40°C to 125°C. This assumes a low-impedance source (<100Ω); higher source impedances increase required acquisition time due to RC settling. For example, a 1kΩ source with 10pF parasitic capacitance yields ~11ns time constant-well within 700ns-but sources >10kΩ may require external buffering or reduced sampling rate to ensure full 14-bit code accuracy.
LTC2312HTS8-14#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:
- -40°C ~ 125°C
- Supplier Device Package:
- TSOT-23-8
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2312HTS8-14#TRPBF FAQ
1.How can I place an order for LTC2312HTS8-14#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2312HTS8-14#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 LTC2312HTS8-14#TRPBF reliable?
The price and inventory of LTC2312HTS8-14#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2312HTS8-14#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2312HTS8-14#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2312HTS8-14#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2312HTS8-14#TRPBF?
LTC2312HTS8-14#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2312HTS8-14#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 LTC2312HTS8-14#TRPBF?
For technical support, including LTC2312HTS8-14#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2312HTS8-14#TRPBF requirements.
6.How does Aetrix verify that LTC2312HTS8-14#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2312HTS8-14#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 LTC2312HTS8-14#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2312HTS8-14#TRPBF?
All LTC2312HTS8-14#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2312HTS8-14#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 LTC2312HTS8-14#TRPBF part is unused and in its original packaging.
Return procedure for LTC2312HTS8-14#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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