LTC2312HTS8-14 - 14-Bit 500ksps Serial SAR ADC | Analog Devices
N.º de pieza: LTC2312HTS8-14 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $6.29 | $6,29 |
| 10 | $5.82 | $58,20 |
| 100 | $5.14 | $514,00 |
| 500 | $4.61 | $2.305,00 |
| 1.000 | $4.1 | $4.100,00 |
LTC2312HTS8-14 Descripción general
A SAR ADC is a successive-approximation-register analog-to-digital converter - a sub-class of data converters that uses a binary-search algorithm against an internal precision DAC to digitize an analog input in N clock cycles for an N-bit result. SAR ADCs sit inside the broader data-converter hierarchy (ADC -> data converter -> signal chain IC -> mixed-signal semiconductor). The LTC2312-14 belongs to the precision/low-power SAR family and is typically deployed where low latency, no pipeline delay, and small package footprint matter more than multi-MHz conversion rates.
Key headline specifications include 14-bit resolution with no missing codes, 500 ksps sampling rate, ±1 LBS INL (typical), a true single-ended analog input range of 0 V to VREF or 2 × VREF depending on configuration, and SPI-compatible serial data output. The integrated 2.5 V or 4.096 V reference (depending on supply) eliminates external reference cost and board area, while the wide -40 °C to +125 °C automotive operating range enables harsh-environment deployment.
The device uses a charge-redistribution SAR core with a switched-capacitor input structure, providing excellent DC accuracy and a wide analog input bandwidth that allows accurate sampling of fast transient signals without an external front-end buffer. The single 3 V/5 V supply and integrated reference also minimize external BOM count for space-constrained designs.
Typical applications include automotive sensor interfaces (pressure, temperature, strain-gauge bridges), industrial 4-20 mA loop digitization, multi-channel data-acquisition systems, battery monitoring, motor control feedback, and portable instrumentation. The 8-pin TSOT-23 footprint is especially attractive for high-density PCBs.
Design tip: route the analog input with a short, guarded trace and place a 1 nF to 10 nF ceramic bypass directly on the AIN pin; the LTC2312-14's switched-capacitor input structure draws charge transients at the sample instant that must be supplied locally to avoid gain error.
This page synthesizes distributor pricing as of 2026-10-13, drop-in pin-compatible alternatives, and practical layout guidance not found in the manufacturer datasheet - giving engineers a one-stop reference for selecting the LTC2312HTS8-14 for precision low-power ADC applications.
Alternativas directas para LTC2312HTS8-14 — 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 LTC2312HTS8-14 (mismo factor de forma y huella) — difiere en Supply Current, RoHS Status, Integrated Reference, Operating Temperature Range, Resolution.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
LTC2312HTS8-14#TRPBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC2312HTS8-14#TRMPBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC2312HTS8-14#WTRPBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC2312HTS8-12
✅ Sustitución directa✓ En stock
$4.18 / unidad
Ver hoja de datos →LTC2314HTS8-14
✅ Sustitución directa✓ En stock
$4.4 / unidad
Ver hoja de datos →LTC2309IF
✅ Sustitución directa✓ En stock
$9.5 / unidad
Ver hoja de datos →LTC2312HTS8-14 Valores máximos y características eléctricas
| Resolución | 14 bits |
| Frecuencia de muestreo | 500 ksps |
| ADC Architecture | SAR (Successive Approximation Register) |
| Number of Input Channels | 1 |
| Tensión de alimentación | 3 V or 5 V (single supply) |
| Corriente de alimentación | 3.2 mA typical |
| Integrated Reference | Yes, low-drift 20 ppm/°C max |
| Integral Non-Linearity (INL) | ±1 LSB (typ) |
| Data Interface | SPI / serial (SCK, SDO, CNV) |
| Analog Input Range | 0 V to VREF (unipolar), 2 × VREF (pseudo-bipolar) |
| Rango de temperatura de funcionamiento | -40 °C to +125 °C (H-grade / automotive) |
| Encapsulado | TSOT-23-8 (8-pin Thin Small Outline Transistor) |
| Tipo de montaje | Surface Mount |
| Nivel MSL | 1 |
| Estado RoHS | Compliant (#TRMPBF suffix) |
| AEC-Q100 Automotive Qualification | Qualified (H-grade suffix) |
Configuración de pines de LTC2312HTS8-14
| Pin 1 | REFIN — Reference input / bypass |
| Pin 2 | GND — Ground |
| Pin 3 | AIN — Analog input |
| Pin 4 | CNV — Convert input (active high) |
| Pin 5 | SCK — Serial clock input |
| Pin 6 | SDO — Serial data output |
| Pin 7 | VDD — Power supply (3 V or 5 V) |
| Pin 8 | REF — Reference output |
Aplicaciones típicas
LTC2312HTS8-14 es adecuado para 7 aplicacións: Automotive Sensor Interface, Industrial 4-20 mA Loop Digitization, Multi-Channel Data Acquisition Systems, Battery Monitoring & Management, Motor Control Feedback, Portable Instrumentation, Strain-Gauge Bridge Digitization.
Automotive Sensor Interface
The LTC2312HTS8-14 is well-suited for automotive sensor signal chains because of its AEC-Q100 (H-grade) qualification, -40 °C to +125 °C operating range, and integrated 20 ppm/°C reference that eliminates drift across the under-hood temperature profile. With 14-bit resolution (16,384 codes) and ±1 LSB INL, the converter delivers adequate dynamic range for 0-5 V analog signals from pressure, MAP, and pedal-position sensors without an external buffer. The 500 ksps throughput captures fast transient events (such as airbag crash pulses) while the 3.2 mA supply current is acceptable for always-on ECU sub-systems. SPI output interfaces directly with automotive microcontrollers (e.g., NXP S32K) using minimal GPIO, and the 8-pin TSOT-23 footprint simplifies layout in cramped ECU housings.
Recomendado
Industrial 4-20 mA Loop Digitization
The LTC2312HTS8-14 fits 4-20 mA current-loop digitization in process-control and factory-automation systems because its 14-bit resolution and ±1 LSB INL accurately resolve the 4-20 mA range after a 250 Ω sense resistor (1-5 V input). At 500 ksps, multiple loops can be multiplexed and digitized by a single ADC, lowering per-channel BOM cost. The integrated reference provides the stability required for IEC 61298 process-control accuracy targets over industrial temperature ranges. The 3 V or 5 V single-supply operation simplifies loop-powered designs, and the SPI-compatible serial output enables isolation barrier placement using digital isolators (e.g., ADuM1411) for high-voltage safety isolation in hazardous-environment installations.
Recomendado
Multi-Channel Data Acquisition Systems
In modular DAQ systems used in test-and-measurement equipment, the LTC2312HTS8-14 offers an attractive combination of 500 ksps throughput, integrated reference, and tiny TSOT-23-8 footprint that allows high channel density on a single PCB. Multiple LTC2312-14 ADCs can share a common SPI bus (each with its own CNV line) to scale to 8, 16, or 32 channels without sacrificing per-channel sample rate. The 14-bit resolution is adequate for vibration analysis, audio-bandwidth signal capture, and general-purpose analog monitoring. The 3.2 mA supply current per channel keeps total system power manageable for multi-channel configurations in benchtop and rack-mount instruments.
Recomendado
Battery Monitoring & Management
The LTC2312HTS8-14 is a strong fit for battery-monitoring ICs in electric vehicles, UPS systems, and grid-storage applications because its 14-bit resolution (16,384 codes) over a 5 V full-scale input delivers 305 µV LSB - fine enough to resolve cell-level state-of-charge and state-of-health voltage variations. The integrated 20 ppm/°C reference ensures accurate readings across the operating-temperature profile without per-module calibration. At 3.2 mA, the ADC's quiescent draw is small relative to the cell-balancing and protection circuitry, and the SPI interface simplifies daisy-chaining multiple modules to a central BMS controller. The H-grade (-40 °C to +125 °C) qualification supports under-hood and outdoor battery-pack deployments.
Recomendado
Motor Control Feedback
Motor-control applications (BLDC, servo drives, robotics) benefit from the LTC2312HTS8-14's 500 ksps sampling rate, which is more than sufficient to digitize current-sense amplifier outputs at PWM frequencies up to 100 kHz while satisfying Nyquist. The 14-bit resolution captures current-loop feedback with enough precision for FOC (field-oriented control) algorithms, and the integrated reference removes a calibration variable across production units. The 3 V/5 V supply and 3.2 mA draw allow direct power from the 3.3 V or 5 V logic rail already present in motor drives, while the small TSOT-23-8 footprint fits within the tight gate-driver and power-stage area. SPI output connects directly to DSP/MCU peripherals without glue logic.
Recomendado
Portable Instrumentation
The LTC2312HTS8-14 is ideal for handheld and portable instruments (multimeters, data loggers, field analyzers) because its 3.2 mA supply current extends battery life, and the TSOT-23-8 package enables sub-30 mm² analog front-end area. The integrated reference eliminates the need for a separate reference IC that would otherwise increase both BOM cost and idle current. The 500 ksps throughput allows real-time capture of transient signals (e.g., in-line voltage spikes during relay switching) while the 14-bit resolution meets the accuracy targets of most handheld instruments. The H-grade automotive temperature range ensures reliable operation in outdoor and industrial environments where portable instruments are deployed.
Recomendado
Strain-Gauge Bridge Digitization
Weigh scales, force sensors, and pressure transducers rely on strain-gauge bridges with differential outputs in the millivolt range, where the LTC2312HTS8-14's 14-bit resolution provides adequate dynamic range when paired with an instrumentation amplifier front-end. The integrated 20 ppm/°C reference drives the bridge excitation, minimizing temperature-induced zero drift that would otherwise dominate measurement error. The 500 ksps throughput supports multi-channel bridge scanning for multi-axis load cells without throughput bottleneck. The TSOT-23-8 package fits within compact OEM load-cell electronics, and the SPI interface connects to low-cost microcontrollers for digital filtering and calibration storage in smart scales.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LTC2312HTS8-14 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LTC2312HTS8-14#TRPBF | LTC2312HTS8-14#TRMPBF | LTC2312HTS8-14#WTRPBF | LTC2312HTS8-12 | LTC2314HTS8-14 | LTC2309IF |
|---|---|---|---|---|---|---|---|
| Package | TSOT-23-8 | TSOT-23-8 - same | TSOT-23-8 - same | TSOT-23-8 - same | TSOT-23-8 - same | TSOT-23-8 - same | TSOT-23-8 - same |
| Brand | Analog Devices | Analog Devices - same | Analog Devices - same | Analog Devices - same | Analog Devices - same | Analog Devices - same | Analog Devices - same |
| Resolution | 14 bits | 14 bits | 14 bits | 14 bits | 12 bits | 14 bits | 12 bits |
| Sampling Rate | 500 ksps | 500 ksps | 500 ksps | 500 ksps | 500 ksps | 500 ksps | 14 ksps |
| Input Channels | 1 single-ended | 1 single-ended | 1 single-ended | 1 single-ended | 1 single-ended | 2 simultaneous | 8 single-ended |
| Supply Current | 3.2 mA | 3.2 mA | 3.2 mA | 3.2 mA | 3.2 mA | 3.2 mA | 1.4 mA |
| Integrated Reference | Yes, 20 ppm/°C max | Yes, 20 ppm/°C max | Yes, 20 ppm/°C max | Yes, 20 ppm/°C max | Yes, 20 ppm/°C max | Yes, 20 ppm/°C max | Yes, internal |
| AEC-Q100 Automotive | Yes (H-grade) | Yes (H-grade) | Yes (H-grade) | Yes (H-grade) | Yes (H-grade) | Yes (H-grade) | No (commercial grade) |
Diferenciadores clave
- Integrated 20 ppm/°C reference in TSOT-23-8 - smallest footprint 14-bit 500ksps SAR with on-chip reference (frente a LTC2309IF)
- Highest single-channel sampling rate in the TSOT-23-8 family (frente a LTC2312HTS8-12)
- Single-channel simplicity versus dual-channel cost (frente a LTC2314HTS8-14)
Notas de diseño
Place a 1 µF ceramic bypass capacitor directly on the VDD pin (Pin 7) and a 100 nF on the REF pin (Pin 8) within 2 mm of the package. The switched-capacitor SAR architecture draws current transients at each conversion edge; inadequate bypassing will inject noise into the analog input and cause gain errors. Use a solid ground plane on layer 2 and route the AIN trace as a guarded microstrip away from SCK/SDO digital lines to minimize coupling.
Route the analog input (Pin 3 AIN) on the top layer with a short, guarded trace terminated in a 10 nF ceramic hold capacitor for wideband source-impedance compensation. The SAR input structure samples a finite charge from the analog source each conversion; if the source impedance exceeds 50 Ω, the sampled charge will settle incompletely and degrade INL. For source impedances above 500 Ω, buffer the input with a low-noise op-amp such as the AD8628.
Do not leave the REFIN pin floating - either connect it to the internal REF output or to an external low-noise reference. Do not drive the SCK clock during the conversion phase (between CNV rising edge and SDO valid); this causes bit-decision errors in the SAR core. The CNV signal must be glitch-free - use the MCU's hardware SPI peripheral rather than bit-banged GPIO to ensure timing integrity.
Keep the SPI bus length under 50 mm and add a 33 Ω series resistor at the SCK driver to damp ringing on the bus. The SDO output transitions during SCK edges can couple back into the analog input through package and PCB parasitic capacitance; if observed as noise, add a 10 pF cap on SDO near the ADC to slow the edge slightly. For long PCB traces, use an external SPI buffer (e.g., ADG3301) at the receiver side to maintain signal integrity.
Información de cumplimiento
RoHS compliant and AEC-Q100 qualified (H-grade suffix). Lead-free per #PBF suffix. Halogen-free status not specified in verified data.
