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Analog Devices Inc. LTC2312ITS8-12#WTRMPBF
- Part No.:
- LTC2312ITS8-12#WTRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2312ITS8-12#WTRMPBF.pdf
- Description:
- IC ADC 12BIT SAR TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:497
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Product details
Overview
LTC2312ITS8-12#WTRMPBF 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 reference, 72.7dB SINAD, and –84dB THD at 500ksps - deployed in high-speed data acquisition, battery-operated systems, and automotive sensor interfaces.
For engineers reviewing the LTC2312ITS8-12#WTRMPBF datasheet, LTC2312ITS8-12#WTRMPBF pinout, LTC2312ITS8-12#WTRMPBF application, or LTC2312ITS8-12#WTRMPBF equivalent, key selection criteria include guaranteed 12-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 AEC-Q100 qualification for –40°C to 85°C operation.
Technical Context
The LTC2312ITS8-12#WTRMPBF implements a fully integrated SAR architecture with on-chip low-drift bandgap reference (20ppm/°C max), internal reference buffer, and sample-and-hold circuitry. Its timing logic synchronizes conversion via internal oscillator, enabling precise 1400ns conversion time and 600ns acquisition window without external clock dependencies.
It features dual-supply isolation: VDD powers analog core (2.7–3.6V or 4.75–5.25V), while OVDD independently supplies digital I/O (1.71–5.25V), allowing interoperability with 1.8V/2.5V/3.3V/5V host logic. The SDO output enters high-impedance state during CONV high, eliminating bus contention in multi-device systems.
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 capture of signals up to 250kHz Nyquist bandwidth with minimal latency. |
| SINAD / SNR | 72.7dB / 73dBFS at 500ksps - enables accurate digitization of medium-dynamic-range signals such as motor current sensing or medical front-ends. |
| THD | –84dB - ensures low harmonic distortion for clean spectral representation in communication and imaging applications. |
| Reference Voltage | 2.048V (VDD = 2.7–3.6V) or 4.096V (VDD = 4.75–5.25V) - provides precise, internally buffered scaling with ≤20ppm/°C drift. |
| Supply Current | 3mA typical at 500ksps (5V), 2mA in nap mode, <1µA in sleep mode - enables ultra-low-power operation in portable and automotive systems. |
| Operating Temp | –40°C to +85°C - qualified per AEC-Q100 Grade 3, suitable for under-hood automotive and industrial environments. |
Pinout & Package
Package: 8-lead plastic TSOT-23 (TS8), 2.9mm × 1.6mm × 0.8mm, lead-free, RoHS-compliant, thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Analog power supply input | Accepts 2.7–3.6V or 4.75–5.25V; powers ADC core, reference, and internal LDO - 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; bypassed with 2.2µF 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. |
| AIN (Pin 4) | Analog input | Single-ended input referenced to GND, 0V to VREF range; input capacitance 13pF (sample), 3pF (hold); leakage ±1µA. |
| OVDD (Pin 5) | Digital I/O supply | Supplies SDO, SCK, CONV logic levels (1.71–5.25V); decoupled with 2.2µF capacitor; independent of VDD voltage domain. |
| SDO (Pin 6) | Serial data output | Three-state MSB-first 12-bit output; high-impedance when CONV = high; timing referenced to SCK falling edge. |
| SCK (Pin 7) | Serial clock input | Accepts up to 20MHz clock; controls data shift timing; logic levels defined by OVDD; requires static state during tCONV. |
| CONV (Pin 8) | Convert control input | Active-high edge-triggered start signal; initiates conversion and places SDO in high-Z; falling edge enables SDO and starts sampling. |
Key Features
| Feature | Design Value |
|---|---|
| No cycle latency | Conversion result appears on SDO immediately after CONV falling edge - eliminates pipeline delay for deterministic real-time control loops. |
| Nap mode auto-entry | Enters 2mA low-power state automatically after each conversion - reduces average current in burst-sampling applications without software overhead. |
| Sleep mode (0.2µA) | Four-consecutive-CONV pulse sequence disables bandgap and reference buffer - ideal for extended idle periods in battery-powered systems. |
| AEC-Q100 qualified | Validated for automotive Grade 3 (–40°C to +85°C) with reliability testing per stress test conditions - supports safety-critical subsystems. |
| Wide OVDD range (1.71–5.25V) | Enables direct interfacing with 1.8V microcontrollers, 2.5V FPGAs, or 3.3V DSPs without level-shifting - simplifies PCB layout and BOM. |
Applications
| Automotive Sensor Interface | Portable Medical Monitor |
|---|---|
Use Scenario: Digitizing analog outputs from pressure, temperature, and position sensors in engine control units and ADAS modules. IC Role / Device Role / Timing Role: High-accuracy, low-latency SAR ADC capturing transient events with deterministic 2µs throughput and AEC-Q100 reliability. Use Value: Enables closed-loop feedback within tight timing budgets while meeting automotive EMI and thermal requirements. |
Use Scenario: Sampling biopotential signals (ECG, EEG) in handheld diagnostic devices powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-power 12-bit ADC with sleep mode (<1µA) and integrated reference - minimizes system-level power budget. Use Value: Extends battery life beyond 72 hours per charge while maintaining clinical-grade SNR (73dBFS) and linearity (±0.4LSB DNL). |
| Industrial Data Logger | Communications Baseband Capture |
Use Scenario: Recording vibration, current, and voltage waveforms in predictive maintenance gateways deployed in harsh factory environments. IC Role / Device Role / Timing Role: Robust 12-bit ADC with –40°C to +85°C operation, 20ppm/°C reference drift, and 500ksps sustained throughput. Use Value: Eliminates need for external reference and calibration over temperature, reducing component count and field failure risk. |
Use Scenario: Capturing IF or baseband signals in software-defined radio (SDR) front-ends and broadband test equipment. IC Role / Device Role / Timing Role: High-SFDR (88dB) ADC with 72.7dB SINAD and –84dB THD - preserves signal integrity for FFT-based modulation analysis. Use Value: Supports accurate spectral characterization of QAM-64 and OFDM signals without requiring post-processing correction. |
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 |
|---|---|---|---|
| ADS7953IRHBT | 12-bit, 1MSPS, SPI interface, 2.7–5.25V supply, no internal reference - requires external 2.5V reference. | Higher speed but lacks integrated reference and AEC-Q100 qualification; suited for non-automotive industrial PLCs. | Select when >500ksps is required and external reference infrastructure already exists; avoid if space-constrained or automotive-certified design needed. |
| MAX11100ETE+ | 12-bit, 500ksps, internal 4.096V reference, 2.7–3.6V only, 10-lead µMAX package - no 5V VDD support. | Same speed and reference integration, but narrower supply range and larger footprint; not AEC-Q100 qualified. | Consider for cost-sensitive 3.3V-only designs where TSOT-23 size is not mandatory; reject for dual-voltage (3V/5V) or automotive use cases. |
Compared with ADS7953IRHBT and MAX11100ETE+, the LTC2312ITS8-12#WTRMPBF uniquely combines AEC-Q100 qualification, dual-voltage operation (3V/5V), integrated low-drift reference, and industry-leading 8-Lead TSOT-23 footprint - making it optimal for space-constrained, safety-aware, and thermally demanding applications.
Availability
LTC2312ITS8-12#WTRMPBF is available at Aetrix Electronics and suitable for automotive sensor interfaces, portable medical monitors, industrial data loggers, and communications baseband capture requiring stable component supply, long-term lifecycle assurance, and AEC-Q100 compliance.
Supply support for LTC2312ITS8-12#WTRMPBF 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 LTC2312-12 belongs to Analog Devices' precision SAR ADC product line, engineered for high-speed, low-power, and high-accuracy data acquisition in space- and energy-constrained systems - especially where integrated references and automotive qualification are critical.
FAQ
What is the maximum sampling rate supported by the LTC2312ITS8-12#WTRMPBF?
The LTC2312ITS8-12#WTRMPBF supports a maximum sampling rate of 500ksps, with guaranteed timing performance including 1400ns conversion time and 600ns acquisition window. This rate is maintained across its full operating temperature range (–40°C to +85°C) and both 3V and 5V supply configurations. At lower rates, the device automatically enters nap mode to reduce average supply current.
Does the LTC2312ITS8-12#WTRMPBF require an external reference?
No, the LTC2312ITS8-12#WTRMPBF includes an integrated, factory-trimmed reference that outputs either 2.048V (when VDD is 2.7–3.6V) or 4.096V (when VDD is 4.75–5.25V), with a maximum temperature coefficient of 20ppm/°C. The REF pin is internally buffered and must be bypassed with a 2.2µF ceramic capacitor; no external reference is needed for standard operation.
How does the nap mode and sleep mode differ in the LTC2312ITS8-12#WTRMPBF?
Nap mode (2mA typical) powers down only the conversion circuitry while retaining reference and bandgap bias - enabling wake-up and valid conversion within one cycle. Sleep mode (<1µA typical) shuts down all active bias, including the reference buffer, requiring 1.1ms recovery time before accurate conversion. Nap mode is entered with two CONV pulses; sleep mode requires four.
Is the LTC2312ITS8-12#WTRMPBF compatible with 1.8V microcontrollers?
Yes, the LTC2312ITS8-12#WTRMPBF supports 1.8V logic through its dedicated OVDD pin (1.71–5.25V range), which defines SDO output voltage levels and SCK/CONV input thresholds. This allows direct connection to 1.8V, 2.5V, 3.3V, or 5V host processors without level-shifting circuitry - simplifying interface design and reducing board area.
What package and environmental qualifications apply to the LTC2312ITS8-12#WTRMPBF?
The LTC2312ITS8-12#WTRMPBF is housed in an 8-lead plastic TSOT-23 (TS8) package and is AEC-Q100 qualified for Grade 3 (–40°C to +85°C). The "#WTRMPBF" suffix denotes automotive-grade tape-and-reel packaging with controlled manufacturing, traceability, and reliability reporting - distinct from commercial-grade variants like #TRMPBF.
LTC2312ITS8-12#WTRMPBF 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#WTRMPBF FAQ
1.How can I place an order for LTC2312ITS8-12#WTRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2312ITS8-12#WTRMPBF 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#WTRMPBF reliable?
The price and inventory of LTC2312ITS8-12#WTRMPBF 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#WTRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2312ITS8-12#WTRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2312ITS8-12#WTRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2312ITS8-12#WTRMPBF?
LTC2312ITS8-12#WTRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2312ITS8-12#WTRMPBF 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#WTRMPBF?
For technical support, including LTC2312ITS8-12#WTRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2312ITS8-12#WTRMPBF requirements.
6.How does Aetrix verify that LTC2312ITS8-12#WTRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2312ITS8-12#WTRMPBF 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#WTRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2312ITS8-12#WTRMPBF?
All LTC2312ITS8-12#WTRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2312ITS8-12#WTRMPBF, 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#WTRMPBF part is unused and in its original packaging.
Return procedure for LTC2312ITS8-12#WTRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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