LTC2312HTS8-12 - 12-Bit 500ksps Serial ADC | Analog Devices
N.º de pieza: LTC2312HTS8-12 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $6.92 | $6,92 |
| 10 | $6.1 | $61,00 |
| 100 | $5.21 | $521,00 |
| 500 | $4.62 | $2.310,00 |
| 1.000 | $4.18 | $4.180,00 |
LTC2312HTS8-12 Descripción general
What is a SAR ADC? A successive-approximation-register analog-to-digital converter is a type of Nyquist-rate ADC that performs a binary search through internal capacitive DACs to converge on the input voltage one bit per clock. SAR ADCs are favored for low-power, moderate-speed, multi-channel precision applications because they offer deterministic latency, no pipeline delay, and excellent DC accuracy without the continuous comparator activity of sigma-delta converters.
The LTC2312HTS8-12 delivers true 12-bit performance with no missing codes, an integrated temperature-compensated reference, and a high-speed SPI-compatible serial interface that simplifies isolated and distributed designs. Its wide input common-mode range (0 V to VDD or unipolar/bipolar operation with external circuitry) and small TSOT-23-8 footprint enable direct mounting next to sensors on compact PCBs. The automotive-grade H temperature suffix extends operation to +125C, making it suitable for harsh industrial and automotive environments.
Architecturally, the device combines a precision SAR core, an internal 2.5 V reference with 20 ppm/°C maximum drift, a reference buffer capable of driving external loads, and a low-power serial interface. The integrated reference eliminates the need for an external precision reference, reducing BOM and board area while maintaining the noise and linearity performance required for precision sensing.
Typical applications include industrial process control loops, automotive sensor digitization, battery monitoring systems, isolated data acquisition front-ends, multi-channel data loggers, and portable instrumentation. The wide operating temperature range and small footprint also suit wearable medical devices, IoT edge sensor nodes, and factory-automation I/O modules.
When designing with this ADC, place the decoupling capacitor as close as possible to the VDD pin and keep the analog input traces short to minimize coupling. The serial interface allows direct connection to microcontrollers and FPGAs; consider adding a small RC filter on the analog input to limit broadband noise. Verify reference stability under all temperature conditions, since reference drift directly impacts ADC accuracy.
Alternativas directas para LTC2312HTS8-12 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con LTC2312HTS8-12 (mismo factor de forma y huella) — difiere en Resolution, RoHS Status, Supply Current, Input Type, Integrated Reference.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
LTC2312CTS8-12
✅ Sustitución directa✓ En stock
$4.38 / unidad
Ver hoja de datos →LTC2312ITS8-12
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC2313ITS8-12
✅ Sustitución directa✓ En stock
$3.37 / unidad
Ver hoja de datos →LTC2361HTS8
✅ Sustitución directa✓ En stock
$2.85 / unidad
Ver hoja de datos →LTC2365HTS8
✅ Sustitución directa✓ En stock
$4.65 / unidad
Ver hoja de datos →LTC2360CTS8
✅ Sustitución directa✓ En stock
$3.45 / unidad
Ver hoja de datos →LTC2312HTS8-12 Valores máximos y características eléctricas
| Resolución | 12 bits |
| Sample Rate | 500 ksps |
| Architecture | SAR (Successive Approximation Register) |
| Number of Channels | 1 input |
| Tensión de alimentación | 3 V or 5 V (single supply) |
| Corriente de alimentación | 3 mA |
| Integrated Reference | Yes, internal 20 ppm/°C maximum drift |
| Reference Buffer | Integrated, capable of driving external loads |
| Interfaz | Serial (SPI-compatible) |
| Encapsulado | TSOT-23-8 |
| Temperature Grade | Automotive / Extended |
| Rango de temperatura de funcionamiento | -40C to +125C |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
| Conversion Type | Single-ended, sampling |
Configuración de pines de LTC2312HTS8-12
| Pin 1 | VDD — Power supply input (3V or 5V) |
| Pin 2 | GND — Ground reference |
| Pin 3 | REF — Reference voltage output / bypass |
| Pin 4 | IN+ — Analog input (positive) |
| Pin 5 | GND — Ground reference |
| Pin 6 | SDO — Serial data output (SPI MISO) |
| Pin 7 | SDI — Serial data input (SPI MOSI) |
| Pin 8 | SCK — Serial clock input (SPI CLK) |
Aplicaciones típicas
LTC2312HTS8-12 es adecuado para 7 aplicacións: Industrial Process Control Sensor Digitization, Automotive Sensor Signal Acquisition, Battery Monitoring and Management Systems, Portable Instrumentation and Data Loggers, Isolated Data Acquisition Front-End, IoT Edge Sensor Nodes, Medical Sensor Signal Acquisition.
Industrial Process Control Sensor Digitization
The LTC2312HTS8-12 is well-suited for industrial 4-20 mA loop-powered or 0-10V sensor digitization at the edge of PLCs and distributed I/O modules. Its 12-bit resolution and 500 ksps sample rate provide adequate dynamic range for temperature, pressure, and flow transducers, while the integrated 20 ppm/°C maximum drift reference eliminates the need for an external precision reference and reduces BOM cost. The TSOT-23-8 footprint fits in compact DIN-rail modules, and the -40C to +125C extended operating temperature range handles factory-floor thermal stress without derating. SPI-compatible connectivity to most industrial MCUs (STM32, PIC32, MSP430) is direct, requiring only three MCU pins (SCK, SDO, CNV).
Recomendado
Automotive Sensor Signal Acquisition
The LTC2312HTS8-12 H temperature grade supports -40C to +125C operation, enabling deployment in non-safety-critical automotive applications such as cabin climate sensors, chassis position sensors, and battery-pack telemetry. Its 500 ksps sample rate accommodates vibration and position feedback loops at rates well above Nyquist, and the SAR architecture provides deterministic latency required for closed-loop control. The integrated reference and reference buffer minimize external components in space-constrained automotive ECUs. According to the LTC2312-12 datasheet, the device is suitable for general automotive sensing; consult Analog Devices' AEC-Q100 qualified portfolio for safety-critical ASIL-rated systems.
Recomendado
Battery Monitoring and Management Systems
The LTC2312HTS8-12 serves as a low-cost cell-voltage monitor in multi-cell battery management systems (BMS) for e-bikes, portable power tools, and small UPS arrays. Its 12-bit resolution and 500 ksps throughput digitize individual cell voltages with sub-10 mV accuracy when paired with a precision resistor divider, and the 3 mA supply current at 5V adds negligible quiescent drain to battery-powered designs. The TSOT-23-8 footprint allows direct placement adjacent to each cell in distributed BMS architectures. Its integrated reference buffer can also drive external resistive dividers, simplifying the analog front end.
Recomendado
Portable Instrumentation and Data Loggers
The LTC2312HTS8-12 enables compact, battery-powered data loggers and handheld instrumentation thanks to its 3 mA operating current from a single 3V or 5V supply. At 500 ksps it can digitize audio-bandwidth signals or transient events, while the SPI-compatible serial interface allows direct connection to low-power MCUs like the MAX32625 or STM32L4 families. The integrated reference (20 ppm/°C) provides sufficient stability for field measurements without thermal calibration, and the TSOT-23-8 package minimizes PCB area in wearable or handheld enclosures. Combined with a small LDO and coin-cell battery, it forms a complete sub-10 mA precision digitizer.
Recomendado
Isolated Data Acquisition Front-End
The LTC2312HTS8-12 supports isolated SPI interfaces when paired with digital isolators such as the ADuM1411 or ADuM3151, enabling high-voltage or noisy industrial environments to safely digitize sensor signals referenced to a different domain. The 3-wire SPI-compatible interface (SCK, SDO, CNV) plus the SDI return path require only 4 isolator channels for full bidirectional data and clock. The 500 ksps throughput over SPI is easily handled by modern isolators with their typical 25-100 Mbps channel speeds, and the TSOT-23-8 footprint fits in the smallest isolated transducer housings, such as current shunts or high-side voltage dividers.
Recomendado
IoT Edge Sensor Nodes
The LTC2312HTS8-12 is well-suited for IoT edge sensor nodes digitizing environmental parameters (temperature, pressure, gas concentration, vibration) for periodic wireless transmission. Its 3 mA supply current at 500 ksps provides reasonable power budgets when duty-cycled, and the SPI interface connects directly to popular wireless SoCs such as the CC2538, nRF52840, or ESP32. The TSOT-23-8 footprint saves PCB area in tiny sensor modules, and the integrated reference eliminates the cost of an external precision reference IC. According to the LTC2312-12 datasheet, the device's wide supply range (2.5V-5.5V) allows direct connection to Li-ion or USB-supplied rails.
Recomendado
Medical Sensor Signal Acquisition
The LTC2312HTS8-12 supports medical-grade sensor signal acquisition in non-life-critical portable diagnostic devices such as pulse oximeters, thermometers, and ambulatory monitors. Its 12-bit resolution and 500 ksps throughput digitize PPG, ECG, and temperature signals with adequate fidelity, while the integrated low-drift reference maintains calibration across body-temperature variations. The TSOT-23-8 footprint enables placement in small wearable enclosures, and the SPI interface connects directly to low-power medical MCUs. According to the LTC2312-12 datasheet, the device's low 3 mA supply current minimizes heat dissipation in skin-contact applications.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LTC2312HTS8-12 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LTC2312CTS8-12 | LTC2312ITS8-12 | LTC2313ITS8-12 | LTC2361HTS8 | LTC2365HTS8 | LTC2360CTS8 |
|---|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | TSOT-23-8 | TSOT-23-8 | TSOT-23-8 | TSOT-23-8 | TSOT-23-8 | TSOT-23-8 | TSOT-23-8 |
| Resolution | 12-bit | 12-bit | 12-bit | 14-bit | 12-bit | 12-bit | 12-bit |
| Sample Rate | 500 ksps | 500 ksps | 500 ksps | 500 ksps | 250 ksps | 250 ksps | 100 ksps |
| Integrated Reference | Yes (20 ppm/°C max) | Yes (20 ppm/°C max) | Yes (20 ppm/°C max) | Yes (20 ppm/°C max) | Yes | Yes | Yes |
| Temperature Grade | Extended (-40C to +125C) | Commercial (0C to +70C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Extended (-40C to +125C) | Extended (-40C to +125C) | Commercial (0C to +70C) |
| Architecture | SAR | SAR | SAR | SAR | SAR | SAR | SAR |
Diferenciadores clave
- Integrated 20 ppm/°C max drift reference and reference buffer (frente a LTC2361HTS8)
- 500 ksps sample rate - 2x faster than LTC236x family (frente a LTC2361HTS8 (250 ksps))
- Extended -40C to +125C operating temperature range (H grade) (frente a LTC2312CTS8-12 (commercial 0C to +70C))
Notas de diseño
Place a 1.0 uF low-ESR ceramic decoupling capacitor as close as possible to the VDD pin (pin 1) to minimize supply noise during SAR conversion switching transients. According to the LTC2312-12 datasheet, the device draws 3 mA from a single 3V or 5V supply; the SAR architecture creates brief current spikes during the internal capacitor DAC switching, so a small (0.1 uF) high-frequency bypass in parallel with the bulk 1.0 uF cap is recommended. Route the analog ground pin (pin 5) directly to a low-impedance ground plane, and avoid running digital traces beneath the ADC to minimize coupling.
Keep the analog input trace (IN+, pin 4) as short as possible and route it away from digital switching signals to minimize capacitive coupling. According to the LTC2312-12 datasheet, the analog input has a wide common-mode range, but adding a small RC anti-aliasing filter (typically 10 ohm + 1 nF) at the input pin can limit broadband noise and prevent kickback from the internal sampling capacitor. For high-impedance sensor connections, add an external input buffer such as the LTC6241 to drive the ADC input directly.
Common pitfalls when designing with the LTC2312HTS8-12 include: (1) omitting the reference bypass capacitor on the REF pin (pin 3), which can cause reference drift and degraded INL; (2) using a digital ground instead of a separate analog ground island, which couples switching noise into the ADC input; (3) failing to set the CNV (chip select) timing correctly in software, which can produce bit errors at full 500 ksps sample rate; and (4) selecting the wrong temperature-grade variant (e.g., LTC2312CTS8-12 commercial grade) for industrial or automotive deployments. The 'H' suffix is mandatory for -40C to +125C operation. Estimated: SPI clock rates up to 20 MHz are typical; verify timing with your specific MCU.
Información de cumplimiento
RoHS compliant per DigiKey product listing. The H temperature grade supports -40C to +125C operation but is not explicitly AEC-Q100 qualified - consult Analog Devices' AEC-Q100 portfolio for safety-critical automotive applications.
