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Analog Devices Inc. LTC2312CTS8-12#TRPBF
- Part No.:
- LTC2312CTS8-12#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2312CTS8-12#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,535
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Product details
Overview
LTC2312CTS8-12#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 max) internal reference (2.048V or 4.096V), and delivers 72.7dB SINAD and –84dB THD at full speed-enabling high-fidelity data acquisition in space-constrained, battery-powered systems such as handheld medical terminals and portable instrumentation.
For engineers reviewing the LTC2312CTS8-12#TRPBF datasheet, LTC2312CTS8-12#TRPBF pinout, LTC2312CTS8-12#TRPBF application, or LTC2312CTS8-12#TRPBF equivalent, this page provides verified technical context, real-world timing behavior, confirmed power modes (nap/sleep), exact pin functions, and two validated alternative SAR ADCs for system-level trade-off analysis.
Technical Context
The LTC2312CTS8-12#TRPBF implements a fully integrated SAR architecture with on-chip sample-and-hold, bandgap reference, and reference buffer-eliminating external reference components. Its conversion timing is governed by an internal oscillator, enabling deterministic 1400ns conversion time and zero-cycle latency output.
It features dual-supply operation: VDD (2.7–3.6V or 4.75–5.25V) powers analog circuitry and reference, while OVDD (1.71–5.25V) independently supplies digital I/O logic-supporting direct interfacing to 1.8V, 2.5V, 3.3V, or 5V host processors without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit-guarantees no missing codes across full temperature range (0°C to 70°C). |
| Sampling Rate | 500ksps-supports real-time acquisition of signals up to 5MHz input bandwidth (–3dB point). |
| SINAD / SNR | 72.7dB / 73dBFS at 500ksps and 5V supply-enables >11.8 effective bits for precision measurement. |
| Reference Output | 2.048V (at 3V VDD) or 4.096V (at 5V VDD)-low-drift (≤20ppm/°C) eliminates need for external reference IC. |
| Power Consumption | 15mW at 5V/500ksps; drops to <1µA in sleep mode-ideal for intermittent-sampling battery applications. |
| Digital Interface | SPI-compatible 3-wire serial (CONV/SCK/SDO); SDO logic levels set by OVDD-enables seamless integration with mixed-voltage SoCs. |
| Acquisition Time | 600ns minimum-dictates maximum allowable source impedance for full 12-bit settling without external buffering. |
Pinout & Package
Package: 8-lead TSOT-23 (0.65mm pitch), RoHS-compliant, lead-free finish. Thermal resistance θJA = 195°C/W. Requires 2.2µF ceramic bypass capacitors on VDD, REF, and OVDD pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Analog power supply input | Accepts 2.7–3.6V or 4.75–5.25V; powers internal reference, SAR core, and sample-and-hold. |
| 2 - REF | Reference input/output | Outputs 2.048V or 4.096V; may be overdriven externally; requires 2.2µF low-ESR ceramic bypass. |
| 3 - GND | Analog ground reference | Must connect directly to solid ground plane; separates analog return path from digital noise. |
| 4 - AIN | Analog input | Single-ended, 0V to VREF range; input capacitance 13pF (sample mode); leakage ±1µA max. |
| 5 - OVDD | Digital I/O supply | 1.71–5.25V; sets SDO/CONV/SCK logic thresholds-decouples digital interface voltage from analog supply. |
| 6 - SDO | Serial data output | Three-state, MSB-first 12-bit stream; enters Hi-Z when CONV = high; no cycle latency. |
| 7 - SCK | Serial clock input | Accepts up to 20MHz; data valid on falling edge; timing-critical for t4 (11ns access) and t7 (1ns hold). |
| 8 - CONV | Convert trigger input | Active-high; rising edge initiates conversion; falling edge enables SDO and starts sample mode. |
Key Features
| Feature | Design Value |
|---|---|
| No-cycle-latency serial output | MSB appears on SDO within 10ns after CONV↓-enables deterministic real-time control loops without pipeline delay. |
| Auto nap-mode power reduction | Enters 2mA nap mode automatically post-conversion-reduces average power at sub-500ksps rates without software intervention. |
| Wide OVDD interface voltage range | 1.71–5.25V digital supply-allows direct connection to 1.8V FPGA I/O banks or 5V microcontrollers without level translators. |
| Guaranteed operation at 125°C junction | Specified for 0°C to 70°C ambient (C-grade); thermal design must maintain TJ ≤ 150°C using θJA = 195°C/W. |
| Internal reference with 20ppm/°C drift | Eliminates external reference IC and trimming-reduces BOM count and layout area in portable diagnostics equipment. |
Applications
| Portable Medical Terminals | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Battery-powered handheld ECG or pulse oximeter acquiring analog biosignals at ≥250ksps for real-time waveform display and arrhythmia detection. IC Role / Device Role / Timing Role: Primary 12-bit digitizer capturing conditioned analog front-end outputs; zero-latency SDO enables immediate DSP preprocessing. Use Value: Integrated 4.096V reference and 73dB SNR ensure clinical-grade amplitude accuracy without calibration; 15mW dissipation extends battery life beyond 8 hours. | Use Scenario: Compact PLC analog input module converting 4–20mA or ±10V sensor outputs in harsh factory environments. IC Role / Device Role / Timing Role: High-speed SAR ADC interfacing to isolated signal conditioners; nap mode reduces thermal load during idle polling intervals. Use Value: 20ppm/°C reference stability maintains measurement integrity across –20°C to 70°C cabinet temperatures; TSOT-23 footprint saves PCB area in dense I/O modules. |
| Automotive Diagnostic Tools | Uninterruptible Power Supply Monitoring |
Use Scenario: OBD-II scan tool sampling engine sensor voltages (TPS, MAP, O2) and CAN bus auxiliary analogs for fault correlation. IC Role / Device Role / Timing Role: Secondary ADC for non-critical analog channels; synchronized via microcontroller's SPI peripheral. Use Value: Dual-supply flexibility (3V VDD + 3.3V OVDD) simplifies integration into 3.3V automotive MCU designs; guaranteed operation to 125°C junction supports under-hood placement. | Use Scenario: Online UPS monitoring AC line voltage, battery voltage, and inverter output with 12-bit resolution for precise charge/discharge control. IC Role / Device Role / Timing Role: Isolated analog monitor ADC sampling at 100ksps during normal operation; sleeps between cycles to minimize standby loss. Use Value: Sleep mode current <1µA cuts quiescent power in always-on monitoring circuits; internal reference avoids drift-induced false trip events during long-term backup operation. |
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; no integrated reference buffer. | Better suited for multi-channel systems (8-channel MUX) where shared external reference is already present. | Select when higher throughput (1MSPS) and channel count outweigh reference integration benefits. |
| MAX11100ETE+ | 12-bit, 500ksps, internal 2.048V reference, but only supports 2.7–3.6V VDD (no 5V option); lower THD (–90dB) but higher typical supply current (3.5mA vs 3mA). | Ideal for 3.3V-only systems prioritizing ultra-low distortion over supply voltage flexibility. | Choose for 3.3V embedded designs requiring best-in-class harmonic performance and smaller 16-pin TQFN package. |
Compared with ADS7953IRHBT and MAX11100ETE+, the LTC2312CTS8-12#TRPBF uniquely combines 5V operation, integrated dual-range reference, and sub-1µA sleep current-making it optimal for cost-sensitive, single-channel, battery-backed instrumentation where board space and BOM count are critical.
Availability
LTC2312CTS8-12#TRPBF is available at Aetrix Electronics and suitable for portable medical terminals, industrial sensor signal conditioning, automotive diagnostic tools, and uninterruptible power supply monitoring requiring stable component supply and long-term production continuity.
Supply support for LTC2312CTS8-12#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC2312CTS8-12#TRPBF belongs to ADI's precision SAR ADC product line, designed specifically for compact, low-power, high-speed data acquisition where integrated references, minimal external components, and guaranteed no-missing-codes performance are essential.
FAQ
What is the operating temperature range for the LTC2312CTS8-12#TRPBF?
The LTC2312CTS8-12#TRPBF is specified for 0°C to 70°C ambient operation (C-grade). Its absolute maximum junction temperature is 150°C, and thermal design must ensure θJA = 195°C/W does not exceed this limit. The device achieves guaranteed 12-bit performance-including INL, DNL, and SINAD-across this full range.
Does the LTC2312CTS8-12#TRPBF require an external reference?
No, the LTC2312CTS8-12#TRPBF does not require an external reference. It integrates a low-drift (≤20ppm/°C) internal reference that outputs 2.048V when VDD is 2.7–3.6V or 4.096V when VDD is 4.75–5.25V. The REF pin is internally buffered and must be bypassed with a 2.2µF ceramic capacitor to GND for stable operation.
How does the nap mode function in the LTC2312CTS8-12#TRPBF?
Nap mode in the LTC2312CTS8-12#TRPBF activates automatically after each conversion completes, reducing supply current to ~2mA. It retains reference buffer and bandgap bias-allowing wake-up and valid conversion within one acquisition cycle (600ns). This differs from sleep mode (<1µA), which shuts down the reference and requires 1.1ms recovery before accurate conversion.
Can the LTC2312CTS8-12#TRPBF interface directly with a 1.8V microcontroller?
Yes, the LTC2312CTS8-12#TRPBF can interface directly with a 1.8V microcontroller. Its OVDD pin accepts 1.71–5.25V, setting logic thresholds for CONV, SCK, and SDO. When OVDD = 1.8V, SDO outputs valid 1.8V-compatible levels, and the microcontroller's 1.8V GPIOs meet VIH/VIL requirements without level-shifting circuitry.
What is the minimum acquisition time required for full 12-bit accuracy with the LTC2312CTS8-12#TRPBF?
The minimum acquisition time (tACQ) for full 12-bit accuracy with the LTC2312CTS8-12#TRPBF is 600ns. This assumes a low-impedance source (<50Ω). Higher source impedances increase required acquisition time; for example, a 1kΩ source may need >1.5µs. External buffering is recommended for high-impedance sensors to guarantee tACQ-MIN compliance.
LTC2312CTS8-12#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:
- 0°C ~ 70°C
- Supplier Device Package:
- TSOT-23-8
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2312CTS8-12#TRPBF FAQ
1.How can I place an order for LTC2312CTS8-12#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2312CTS8-12#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 LTC2312CTS8-12#TRPBF reliable?
The price and inventory of LTC2312CTS8-12#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2312CTS8-12#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2312CTS8-12#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2312CTS8-12#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2312CTS8-12#TRPBF?
LTC2312CTS8-12#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2312CTS8-12#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 LTC2312CTS8-12#TRPBF?
For technical support, including LTC2312CTS8-12#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2312CTS8-12#TRPBF requirements.
6.How does Aetrix verify that LTC2312CTS8-12#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2312CTS8-12#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 LTC2312CTS8-12#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2312CTS8-12#TRPBF?
All LTC2312CTS8-12#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2312CTS8-12#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 LTC2312CTS8-12#TRPBF part is unused and in its original packaging.
Return procedure for LTC2312CTS8-12#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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