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Analog Devices Inc. LTC2312ITS8-12#TRPBF
- Part No.:
- LTC2312ITS8-12#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2312ITS8-12#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,107
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Product details
Overview
LTC2312ITS8-12#TRPBF from Analog Devices (formerly Linear Technology) is a 12-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) internal reference (2.048V or 4.096V), and delivers 72.7dB SINAD and –84dB THD at full speed. It targets high-speed, low-power data acquisition in battery-operated and space-constrained systems such as handheld terminals and medical imaging front-ends.
For engineers reviewing the LTC2312ITS8-12#TRPBF datasheet, LTC2312ITS8-12#TRPBF pinout, LTC2312ITS8-12#TRPBF application, or LTC2312ITS8-12#TRPBF equivalent, this page provides verified technical context, exact pin functions, real-world application mappings, and validated alternative options for industrial and automotive-grade signal chain design.
Technical Context
The LTC2312ITS8-12#TRPBF implements a true SAR architecture with no pipeline latency and guaranteed 12-bit no-missing-codes performance across –40°C to +85°C. Its integrated reference buffer supports automatic 2.048V output at 2.7–3.6V VDD and 4.096V at 4.75–5.25V VDD, eliminating external reference components.
It features a 3-wire SPI-compatible serial interface with independent OVDD (1.71–5.25V) for logic-level flexibility, nap mode (<2mA quiescent) after conversion, and sleep mode (<0.2µA) with 1.1ms wake-up time. Acquisition time is fixed at 600ns, conversion time at 1400ns, and throughput at exactly 500ksps with zero cycle latency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees monotonic transfer function and no missing codes over full temperature range. |
| Sampling Rate | 500ksps - fixed maximum throughput; enables real-time capture of signals up to 250kHz Nyquist bandwidth. |
| SINAD | 72.7dB at 5V, fIN = 20kHz - defines usable dynamic range for precision measurement applications. |
| THD | –84dB at 5V, fIN = 20kHz - limits harmonic distortion in high-fidelity signal digitization. |
| Reference Drift | ≤20ppm/°C - ensures stable full-scale accuracy across –40°C to +85°C without calibration. |
| Power Dissipation | 15mW at 5V, 500ksps - enables compact thermal design in uncooled portable instrumentation. |
| Operating Temp | –40°C to +85°C - qualified for industrial and automotive under-hood environments. |
Pinout & Package
Package: 8-lead plastic TSOT-23 (0.65mm pitch, 2.9mm × 1.6mm footprint). RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Analog power supply input | Accepts 2.7–3.6V or 4.75–5.25V; powers core ADC, reference, and sample-and-hold; requires 2.2µF ceramic bypass to GND. |
| 2 - REF | Reference input/output | Outputs 2.048V (at 3V range) or 4.096V (at 5V range); may be overdriven externally; bypassed with 2.2µF low-ESR capacitor. |
| 3 - GND | Analog ground | Primary return path for analog circuitry; must connect directly to solid ground plane to minimize noise coupling. |
| 4 - AIN | Analog input | Single-ended input referenced to GND; full-scale range = 0V to VREF; input capacitance = 13pF in sample mode. |
| 5 - OVDD | Digital I/O supply | Supplies SDO, SCK, CONV logic levels; supports 1.71–5.25V; decoupled with 2.2µF ceramic capacitor. |
| 6 - SDO | Serial data output | Three-state MSB-first 12-bit output; enters Hi-Z when CONV = high; timing referenced to SCK falling edge. |
| 7 - SCK | Serial clock input | Accepts up to 20MHz clock; synchronizes data readout; logic thresholds defined by OVDD voltage. |
| 8 - CONV | Convert start input | Active-high edge-triggered control; initiates conversion and places SDO in active state on falling edge. |
Key Features
| Feature | Design Value |
|---|---|
| No cycle latency | Conversion result appears on SDO immediately after CONV falling edge - eliminates pipeline delay in closed-loop control. |
| Integrated reference buffer | Eliminates need for external reference IC or resistor divider; reduces BOM count and PCB area in space-constrained designs. |
| Nap mode auto-entry | Enters <2mA low-power state automatically after each conversion - cuts average power in burst-sampling applications. |
| Wide OVDD range | 1.71–5.25V digital supply allows direct interfacing with 1.8V FPGA I/O banks, 2.5V ASICs, or 3.3V microcontrollers without level shifters. |
| Guaranteed operation to +85°C | Qualified per Industrial temperature grade (I-grade) - supports deployment in non-derated industrial automation and motor control systems. |
Applications
| Communication Systems | High Speed Data Acquisition |
|---|---|
|
Use Scenario: Digitizing IF signals in software-defined radio (SDR) receivers operating at intermediate frequencies up to 250kHz. IC Role / Device Role / Timing Role: Primary sampling ADC capturing baseband or low-IF analog waveforms with minimal group delay. Use Value: 72.7dB SINAD and –84dB THD preserve modulation fidelity; 500ksps rate supports 16-QAM and QPSK symbol rates within Nyquist limit. |
Use Scenario: Real-time waveform capture in portable oscilloscopes and power quality analyzers. IC Role / Device Role / Timing Role: High-fidelity front-end ADC converting sensor outputs (voltage, current, temperature) with deterministic timing. Use Value: Zero-cycle latency enables precise trigger alignment; integrated reference ensures consistent full-scale scaling across temperature swings. |
| Handheld Terminal Interface | Medical Imaging |
|
Use Scenario: Signal conditioning for biometric sensors (ECG, pulse oximetry) in battery-powered diagnostic devices. IC Role / Device Role / Timing Role: Low-power, high-accuracy ADC acquiring physiological waveforms at sub-500ksps rates. Use Value: Nap mode reduces average current to ~1.5mA at 100ksps; 12-bit resolution captures subtle amplitude variations in low-amplitude biosignals. |
Use Scenario: Digitizing analog outputs from ultrasound transducer arrays or X-ray detector front-ends. IC Role / Device Role / Timing Role: High-SNR ADC in multi-channel acquisition modules requiring tight channel matching and low inter-channel crosstalk. Use Value: ≤20ppm/°C reference drift maintains gain stability across scan durations; TSOT-23 package enables dense channel packing on compact PCBs. |
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, but requires external reference and separate AVDD/DVDD supplies; higher power (12mW at 1MSPS). | Best suited for higher-throughput, multi-channel systems where external reference control and channel sequencing are required. | Select when >500ksps sampling or programmable input ranges are needed; avoid if board space or BOM simplification is critical. |
| MAX11192ETE+ | 12-bit, 500ksps, internal reference (2.048V only), TSOT-23-8 package, but rated only to +70°C (C-grade) and lacks nap mode. | Applicable in commercial-grade portable instruments where extended temperature range is not required. | Choose for cost-sensitive consumer applications; reject for industrial deployments requiring guaranteed –40°C to +85°C operation. |
Compared with ADS7953IRHBT and MAX11192ETE+, the LTC2312ITS8-12#TRPBF uniquely combines industrial temperature rating, integrated dual-range reference, nap-mode power savings, and zero-latency output - making it optimal for compact, battery-aware, thermally demanding signal acquisition.
Availability
LTC2312ITS8-12#TRPBF is available at Aetrix Electronics and suitable for high-speed data acquisition, handheld terminal interface, and medical imaging applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.
Supply support for LTC2312ITS8-12#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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC2312-12 belongs to Linear's precision SAR ADC family designed for low-power, high-speed, space-constrained signal chain applications where integration, accuracy, and thermal stability are critical.
FAQ
What is the operating temperature range of the LTC2312ITS8-12#TRPBF?
The LTC2312ITS8-12#TRPBF is specified for industrial-grade operation from –40°C to +85°C. This range is explicitly confirmed in the Absolute Maximum Ratings table and Electrical Characteristics section of the official datasheet, and applies to all performance parameters including INL, DNL, SINAD, and reference drift. The "I" in the part number denotes this industrial temperature grade.
Does the LTC2312ITS8-12#TRPBF require an external reference?
No, the LTC2312ITS8-12#TRPBF does not require an external reference. It integrates a low-drift (≤20ppm/°C) internal reference that outputs 2.048V when powered from 2.7–3.6V VDD and 4.096V when powered from 4.75–5.25V VDD. The REF pin is internally buffered and must be bypassed with a 2.2µF ceramic capacitor to GND for stable operation.
What is the minimum acquisition time for the LTC2312ITS8-12#TRPBF?
The minimum acquisition time (tACQ) for the LTC2312ITS8-12#TRPBF is 600ns, as specified in the ADC Timing Characteristics table. This value is guaranteed over the full –40°C to +85°C temperature range and is independent of sampling rate. It defines the shortest time the analog input must settle before conversion begins.
How does nap mode work on the LTC2312ITS8-12#TRPBF?
Nap mode on the LTC2312ITS8-12#TRPBF activates automatically after each conversion completes, reducing supply current to ≤2mA. It retains reference buffer and bandgap bias, enabling wake-up and valid conversion within one clock cycle. Unlike sleep mode, nap mode requires no recovery delay and is ideal for intermittent sampling at rates below 500ksps.
Is the LTC2312ITS8-12#TRPBF pin-compatible with other members of the LTC2312 family?
Yes, the LTC2312ITS8-12#TRPBF shares identical pinout and package (8-lead TSOT-23) with all variants in the LTC2312 family, including the LTC2312CTS8-12#TRPBF (0°C to +70°C) and LTC2312HTS8-12#TRPBF (–40°C to +125°C). Functionally, it is also compatible with the 14-bit LTC2312-14 variants, differing only in resolution and dynamic performance specifications.
LTC2312ITS8-12#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:
- 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, 5V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V, 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- TSOT-23-8
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2312ITS8-12#TRPBF FAQ
1.How can I place an order for LTC2312ITS8-12#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2312ITS8-12#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 LTC2312ITS8-12#TRPBF reliable?
The price and inventory of LTC2312ITS8-12#TRPBF 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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2312ITS8-12#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2312ITS8-12#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2312ITS8-12#TRPBF?
LTC2312ITS8-12#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2312ITS8-12#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 LTC2312ITS8-12#TRPBF?
For technical support, including LTC2312ITS8-12#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2312ITS8-12#TRPBF requirements.
6.How does Aetrix verify that LTC2312ITS8-12#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2312ITS8-12#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 LTC2312ITS8-12#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2312ITS8-12#TRPBF?
All LTC2312ITS8-12#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2312ITS8-12#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 LTC2312ITS8-12#TRPBF part is unused and in its original packaging.
Return procedure for LTC2312ITS8-12#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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