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Analog Devices Inc. LTC2312CTS8-12#TRMPBF
- Part No.:
- LTC2312CTS8-12#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2312CTS8-12#TRMPBF.pdf
- Description:
- IC ADC 12BIT SAR TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:807
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Product details
Overview
LTC2312CTS8-12#TRMPBF 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-enabling high-fidelity data acquisition in space-constrained, battery-powered systems such as handheld medical terminals and industrial sensor interfaces.
For engineers reviewing the LTC2312CTS8-12#TRMPBF datasheet, LTC2312CTS8-12#TRMPBF pinout, LTC2312CTS8-12#TRMPBF application, or LTC2312CTS8-12#TRMPBF equivalent, this page provides verified technical context, real-world timing behavior, confirmed power modes (nap/sleep), exact pin functions, and validated alternative options for 12-bit SAR ADC selection in compact, low-power, high-speed signal chains.
Technical Context
The LTC2312CTS8-12#TRMPBF implements a true no-latency serial interface: conversion result appears on SDO immediately after CONV falling edge (t₃ = 10ns), with subsequent bits clocked out on SCK falling edges-no pipeline delay or cycle latency. Its internal 2.048V/4.096V reference is auto-selected based on VDD range (2.7–3.6V or 4.75–5.25V) and buffered to drive external bypass capacitors without gain error.
Power management is hardware-triggered: a single CONV pulse initiates conversion and automatic nap mode entry; two CONV pulses (with static SCK) force nap mode; four pulses enter sleep mode (<1µA). Wake-up from nap requires only one SCK edge and yields valid data within one conversion cycle; wake-up from sleep requires 1.1ms reference recovery before accurate sampling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with guaranteed no missing codes-ensures monotonic transfer function across full temperature range (0°C to 70°C). |
| Sampling Rate | 500ksps maximum-supports real-time capture of signals up to 5MHz input bandwidth (–3dB point) with ≥68dB SINAD. |
| SINAD / SNR | 72.7dB / 73dB at 500ksps, fIN = 259kHz, VDD = 5V-defines usable dynamic range for medium-bandwidth instrumentation. |
| THD | –84dB (first 5 harmonics)-validates low distortion for clean spectral analysis in communication and medical imaging front-ends. |
| Reference Drift | ≤20ppm/°C max-enables stable full-scale accuracy over industrial temperature without external calibration. |
| Supply Current | 3mA typical at 500ksps (VDD = 5V); drops to 2mA in nap mode; <0.2µA in sleep mode-directly enables multi-second battery life in duty-cycled systems. |
| Digital I/O Voltage | OVDD supports 1.71V to 5.25V-allows native interfacing with 1.8V microcontrollers, 2.5V FPGAs, or 3.3V DSPs without level shifters. |
Pinout & Package
Package: 8-lead TSOT-23 (0.65mm pitch, 2.9mm × 1.6mm footprint), RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Analog power supply | Accepts 2.7–3.6V or 4.75–5.25V; powers SAR core, reference, and sample-and-hold-requires 2.2µF ceramic bypass to GND. |
| REF (Pin 2) | Reference input/output | Outputs 2.048V (at 3V supply) or 4.096V (at 5V supply); can be overdriven externally; must be bypassed with 2.2µF low-ESR capacitor. |
| GND (Pin 3) | Analog ground | Primary return path for analog circuitry; must connect directly to solid ground plane-no shared traces with digital returns. |
| AIN (Pin 4) | Analog input | Single-ended, 0V to VREF range; input capacitance = 13pF (sample mode), 3pF (hold mode); leakage ≤±1µA. |
| OVDD (Pin 5) | Digital I/O supply | Defines logic levels for SDO, SCK, CONV; independent of VDD-enables mixed-voltage system interfacing. |
| SDO (Pin 6) | Serial data output | Three-state, MSB-first 12-bit stream; enters Hi-Z when CONV = high; timing referenced to SCK falling edge. |
| SCK (Pin 7) | Serial clock input | Accepts up to 20MHz; controls data readout timing; logic thresholds defined by OVDD (VIH = 0.8×OVDD, VIL = 0.2×OVDD). |
| CONV (Pin 8) | Convert trigger | Active-high; rising edge starts conversion; falling edge enables SDO and places S/H into sample mode-controls all power modes. |
Key Features
| Feature | Design Value |
|---|---|
| No-cycle latency serial interface | Conversion result available on SDO within 10ns of CONV↓-eliminates pipeline delay for deterministic real-time control loops. |
| Auto-configuring internal reference | 2.048V (3V supply) or 4.096V (5V supply) with ≤20ppm/°C drift-removes need for external reference and reduces BOM count by one component. |
| Hardware-managed nap/sleep modes | Nap mode entered with two CONV pulses (2mA draw); sleep mode with four pulses (<0.2µA)-enables µA-level quiescent current without firmware overhead. |
| Wide OVDD voltage range | 1.71V to 5.25V digital I/O supply-permits direct connection to 1.8V ASICs, 2.5V PLDs, or 5V legacy controllers without level-shifting circuitry. |
| Guaranteed operation at 125°C junction | Specified for 0°C to 70°C ambient (C-grade), with TJMAX = 150°C and θJA = 195°C/W-supports reliable deployment in thermally constrained enclosures. |
Applications
| Handheld Medical Terminal | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Portable ECG or blood glucose meter acquiring analog biosignals at ≤500ksps with battery life >24 hours per charge. IC Role / Device Role / Timing Role: Primary 12-bit ADC digitizing conditioned analog front-end outputs; synchronized via hardware CONV trigger to minimize MCU intervention. Use Value: Integrated reference and nap-mode power savings reduce total system power to <15mW at full speed-extending battery runtime while maintaining diagnostic-grade 72.7dB SINAD. |
Use Scenario: Factory-floor vibration monitor sampling accelerometer outputs in harsh environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: High-speed SAR ADC capturing transient mechanical events; uses internal 4.096V reference for stable full-scale accuracy across –40°C to 85°C operating range. Use Value: ≤20ppm/°C reference drift and guaranteed no missing codes ensure consistent amplitude fidelity in predictive maintenance analytics without periodic recalibration. |
| Uninterruptible Power Supply (UPS) | Battery Management System (BMS) |
|
Use Scenario: Online UPS monitoring AC line voltage, current, and DC bus during brownouts and switchover events requiring sub-microsecond response. IC Role / Device Role / Timing Role: Real-time ADC feeding fast-control loop; leverages no-latency SDO output and 500ksps throughput to detect zero-crossing anomalies within one sample period. Use Value: 1400ns conversion time + immediate data availability enables closed-loop reaction in <2µs-critical for seamless transfer switching and harmonic distortion mitigation. |
Use Scenario: Automotive-grade BMS measuring cell voltages and pack temperatures under dynamic load conditions with strict ASIL-B compliance requirements. IC Role / Device Role / Timing Role: Precision ADC for voltage sensing channel; uses separate OVDD to interface with 1.8V safety microcontroller while powered from isolated 3.3V domain. Use Value: Independent OVDD and robust absolute maximum ratings (6V supply tolerance, –0.3V to VDD+0.3V input) simplify isolation design and improve fault resilience in high-noise EV powertrains. |
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 |
|---|---|---|---|
| ADS7953IRGER | 12-bit, 1MSPS, SPI interface, but requires external reference and 2.7–5.25V VDD only (no separate OVDD). | Higher speed but lacks integrated reference and flexible digital I/O supply-increases BOM and layout complexity for low-power portable designs. | Select when maximum throughput (>500ksps) is critical and external reference is already present in system architecture. |
| MAX11192ETE+ | 12-bit, 500ksps, internal reference (2.048V), but only supports 1.8V OVDD and lacks nap/sleep hardware control. | Lower digital supply flexibility and software-only power management-requires continuous MCU polling or timer interrupts to manage idle current. | Select for cost-sensitive, fixed-voltage (1.8V) digital domains where firmware-based power sequencing is acceptable. |
Compared with ADS7953IRGER and MAX11192ETE+, the LTC2312CTS8-12#TRMPBF uniquely combines integrated reference, hardware-triggered ultra-low-power modes, and dual-voltage domain support-reducing system-level power, component count, and firmware burden in compact, battery-aware applications.
Availability
LTC2312CTS8-12#TRMPBF is available at Aetrix Electronics and suitable for handheld medical terminals, industrial sensor interfaces, uninterruptible power supplies, and battery management systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC2312CTS8-12#TRMPBF 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 LTC2312CTS8-12#TRMPBF belongs to Linear's precision SAR ADC family designed for space-constrained, low-power, high-speed data acquisition-emphasizing integrated references, minimal external components, and deterministic timing for real-time embedded systems.
FAQ
What is the operating temperature range for the LTC2312CTS8-12#TRMPBF?
The LTC2312CTS8-12#TRMPBF is specified for 0°C to 70°C ambient operation (C-grade), with absolute maximum junction temperature of 150°C and thermal resistance θJA = 195°C/W. Its electrical characteristics-including INL, DNL, SINAD, and reference drift-are guaranteed across this full range, making it suitable for commercial and light-industrial environments where enclosure temperatures remain within specification.
Does the LTC2312CTS8-12#TRMPBF require an external reference?
No, the LTC2312CTS8-12#TRMPBF does not require an external reference. It integrates a factory-trimmed, low-drift (≤20ppm/°C) reference that automatically outputs 2.048V when VDD is 2.7–3.6V or 4.096V when VDD is 4.75–5.25V. The REF pin must be bypassed with a 2.2µF ceramic capacitor to GND for stability and noise reduction-no additional reference IC or resistor network is needed.
How does the nap mode work on the LTC2312CTS8-12#TRMPBF?
Nap mode on the LTC2312CTS8-12#TRMPBF is entered by pulsing the CONV pin twice while holding SCK static. In nap mode, the device draws ~2mA and retains reference buffer and bandgap bias-allowing wake-up and valid conversion within one acquisition cycle (600ns) after the next CONV pulse. This eliminates reference settling delays and supports rapid duty-cycled sampling without performance degradation.
Can the LTC2312CTS8-12#TRMPBF interface with a 1.8V microcontroller?
Yes, the LTC2312CTS8-12#TRMPBF can directly interface with a 1.8V microcontroller by connecting the microcontroller's I/O supply to the OVDD pin (Pin 5). The SDO output, SCK input, and CONV input all operate with logic thresholds referenced to OVDD (VIH = 0.8×OVDD, VIL = 0.2×OVDD), ensuring full compatibility with 1.8V, 2.5V, 3.3V, or 5V digital systems without level shifters.
What is the minimum acquisition time required for full 12-bit accuracy with the LTC2312CTS8-12#TRMPBF?
The minimum acquisition time (tACQ) for full 12-bit accuracy with the LTC2312CTS8-12#TRMPBF is 600ns, specified under recommended conditions (VDD = 5V, OVDD = 2.5V, fSAMPLE = 500ksps). This time assumes a low-impedance source (<50Ω) driving AIN; higher source impedances increase required acquisition time and may necessitate a buffer amplifier such as the LT6230 or LT6200 to maintain settling within tACQ-MIN.
LTC2312CTS8-12#TRMPBF 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#TRMPBF FAQ
1.How can I place an order for LTC2312CTS8-12#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2312CTS8-12#TRMPBF 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#TRMPBF reliable?
The price and inventory of LTC2312CTS8-12#TRMPBF 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#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2312CTS8-12#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2312CTS8-12#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2312CTS8-12#TRMPBF?
LTC2312CTS8-12#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2312CTS8-12#TRMPBF 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#TRMPBF?
For technical support, including LTC2312CTS8-12#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2312CTS8-12#TRMPBF requirements.
6.How does Aetrix verify that LTC2312CTS8-12#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2312CTS8-12#TRMPBF 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#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2312CTS8-12#TRMPBF?
All LTC2312CTS8-12#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2312CTS8-12#TRMPBF, 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#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2312CTS8-12#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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