LTC2365HTS8 - 12-Bit 1Msps SAR ADC | Analog Devices | TSOT-23-8
N.º de pieza: LTC2365HTS8 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $7.5 | $7,50 |
| 10 | $6.75 | $67,50 |
| 100 | $6.05 | $605,00 |
| 500 | $5.4 | $2.700,00 |
| 1.000 | $4.65 | $4.650,00 |
LTC2365HTS8 Descripción general
Background: A SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a class of data converter that performs a binary search across the analog input range using an internal DAC and comparator, producing one conversion per N clock cycles for N bits of resolution. SAR ADCs sit within the broader ADC family (SAR, sigma-delta, pipeline, flash) and are widely chosen for applications that need deterministic latency, low power, and small package size. The LTC2365 belongs to the TSOT-23 ADC family from Analog Devices, optimized for space-constrained precision front ends.
Key features include a high dynamic range sample-and-hold front end, a high-speed SPI-/QSPI-/MICROWIRE-compatible serial interface, an external reference option (0 V to VDD or 0 V to VREF input range), 72 dB SINAD and -80 dB THD at full sample rate, and a 1 Msps throughput in the LTC2365 grade. The low 2 mA supply current at 1 Msps makes the part suitable for battery-powered and portable instruments, while the TSOT-23-8 footprint allows placement directly next to sensors on crowded mixed-signal boards.
Architecturally, the device pairs a charge-redistribution capacitive DAC with an internal oscillator and clock generator; no external clock source is required, which simplifies BOM. The high-impedance analog input and reference pin allow direct connection to low-power sensor outputs or to a precision external reference such as the LT1461. Nap and shutdown modes further reduce current consumption to microampere levels for duty-cycled measurements.
Typical applications include portable data acquisition, multichannel sensor front-end digitization, isolated or industrial process control loops, optical module monitoring, and instrumentation where a small serial ADC saves board area. The wide input common-mode range and small 3 mm x 2.9 mm TSOT-23 footprint make it ideal for high-density plug-in modules where SPI-based ADCs are preferred over parallel-interface devices.
When designing with the LTC2365, place a 0.1 uF decoupling capacitor as close as possible to the VDD pin, route the analog input traces away from the serial clock, and use a low-noise reference if DC accuracy below 1 LSB is needed at 12 bits. The LTC2365HTS8 is one of several H-grade speed variants; the C-, I-, and H-suffix parts differ in throughput (200 ksps / 500 ksps / 1 Msps respectively), allowing designers to scale speed and power with the same PCB layout.
This page synthesizes distributor pricing, drop-in same-family variants, and practical design notes not all found in a single manufacturer data brief.
Alternativas directas para LTC2365HTS8 — 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 LTC2365HTS8 (mismo factor de forma y huella) — difiere en RoHS Status, Operating Temperature, Supply Voltage, Number of Channels, Supply Current.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
LTC2365ITS8
✅ Sustitución directa✓ En stock
$3.58 / unidad
Ver hoja de datos →LTC2365CTS8
✅ Sustitución directa✓ En stock
$5.1 / unidad
Ver hoja de datos →LTC2361HTS8
✅ Sustitución directa✓ En stock
$2.85 / unidad
Ver hoja de datos →LTC2362ITS8
✅ Sustitución directa✓ En stock
$3.58 / unidad
Ver hoja de datos →LTC2360HTS8
✅ Sustitución directa✓ En stock
$3.78 / unidad
Ver hoja de datos →LTC2312HTS8-14
✅ Sustitución directa✓ En stock
$4.1 / unidad
Ver hoja de datos →LTC2365HTS8 Valores máximos y características eléctricas
| Resolución | 12 bits |
| Sample Rate (Throughput) | 1 Msps |
| Number of Channels | 1 |
| Architecture | SAR (Successive Approximation Register) |
| Input Type | Single-ended, pseudo-differential (unipolar) |
| Analog Input Range | 0 V to VDD or 0 V to VREF |
| Supply Voltage (VDD) | 2.5 V or 3 V (single supply) |
| Supply Current at 1 Msps | 2 mA |
| SINAD | 72 dB at 1 Msps |
| THD | -80 dB at 1 Msps |
| Digital Interface | SPI / QSPI / MICROWIRE compatible, serial |
| Package Type | TSOT-23-8 (TS8) |
| Rango de temperatura de funcionamiento | -40C to +125C (H-grade automotive/industrial) |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
| Lead-Free / #TRMPBF suffix | Yes (Pb-free, Matte Tin) |
Configuración de pines de LTC2365HTS8
| Pin 1 | CH0 — Analog input channel 0 (single-ended, 0 V to VDD) |
| Pin 2 | VREF — External reference input; bypassed with 10 uF + 0.1 uF cap |
| Pin 3 | VDD — 3 V (or 2.5 V) supply; bypassed with 0.1 uF close to pin |
| Pin 4 | GND — Ground / reference for analog and digital return currents |
| Pin 5 | SDO — Serial Data Output (to host MCU SPI MISO line) |
| Pin 6 | SCK — Serial Clock Input from host MCU |
| Pin 7 | CS — Chip Select (active low) |
| Pin 8 | CONV — Conversion Start input (rising edge initiates a new conversion) |
Aplicaciones típicas
LTC2365HTS8 es adecuado para 6 aplicacións: Portable Battery Data Acquisition, Multichannel Sensor Front-End Digitization, Industrial Process Control Loops, Optical Module Monitoring (SFP/QSFP), Handheld Test & Measurement Instruments, Wireless Sensor Node Data Front-End.
Portable Battery Data Acquisition
The LTC2365HTS8 is purpose-built for portable, battery-powered data acquisition front-ends because of its 2 mA supply current at 1 Msps and ultra-low microamp nap/shutdown current states. The 1 Msps throughput is fast enough to capture multi-kHz sensor channels (e.g., vibration, ultrasonic) from battery-sized packs where every milliamp matters; the TSOT-23-8 footprint lets the converter sit millimeters from the sensor, minimizing analog trace length. The wide 0 V to VDD analog input range simplifies single-supply sensor signal chains, and the 72 dB SINAD enables 12-bit ENOB-grade accuracy when paired with a low-noise 2.5 V reference such as the LT1461. For systems that need on-demand bursts of high-speed sampling followed by long idle periods, the dedicated nap and shutdown pins cut idle current to a few microamps, making the part a default choice for handheld oscilloscope front-ends and wireless sensor transmitters.
Recomendado
Multichannel Sensor Front-End Digitization
For multi-channel sensor digitization with a shared SPI bus, the LTC2365HTS8 is a strong per-channel choice because each device occupies only the eight TSOT-23 lands and requires no external clock or bias-generation circuitry. Stacking several devices behind a single microcontroller SCK line saves space in multiplexing or simultaneous-sampling modules (each channel keeps its own sample-and-hold, but tight per-channel latency is preserved). At 1 Msps per channel, a 4-channel module can digitize 4 kHz sensor bandwidth per channel with deterministic 12-bit conversion - ideal for bridge/load-cell signal chains, optical encoders, or quad-axis MEMs bias compensation. The pseudo-differential input with 0 V to VREF scaling accepts ground-referenced bridge outputs directly, while the SPI/QSPI digital interface lets the host MCU clock channel data on-the-fly through a single CSEL pin.
Recomendado
Industrial Process Control Loops
In industrial 4-20 mA process loops, the LTC2365HTS8 acts as the ADC companion to a current-loop receiver, digitizing the recovered 0-20 mA equivalent voltage with 12-bit dynamic range at low latency. The wide -40C to +125C H-grade operating temperature ensures reliable behavior on factory floor PLC cards and on -instrumentation modules with no special thermal derating. The device's SAR architecture delivers deterministic conversion time - critical for closed-loop control where sigma-delta filter group delay would complicate PID tuning - and the low 2 mA supply current keeps total PLC I/O module power budget low. The TSOT-23-8 form factor enables the ADC to be placed immediately next to the analog input pin on PLC cards, minimizing analog noise pickup from adjacent power stage traces.
Recomendado
Optical Module Monitoring (SFP/QSFP)
Inside SFP and QSFP transceiver modules where every cubic millimeter matters, the LTC2365HTS8's TSOT-23-8 footprint (3 mm x 2.9 mm) fits directly next to the photodiode or TEC (thermoelectric cooler) sense output without competing for shared board real estate. The 1 Msps throughput monitors temperature bias and laser power envelope continuously, providing the per-channel analog input range needed to capture both thermistor divider outputs and laser PIN photodiode current shunt voltages on the same supply rail. The 12-bit resolution is well matched to module-monitor BOMs targeting +/-5% bias control, while the SPI interface ties into the same MCU that handles DDMI EEPROM I/O. Analog Devices' long-term supply guarantee for SAR ADCs in TSOT-23-8 protects this design across module product cycles of 5-7 years.
Recomendado
Handheld Test & Measurement Instruments
The LTC2365HTS8 is a textbook fit for handheld digital multimeter and oscilloscope-class instrument inputs because its 1 Msps rate resolves 1-microsecond transient pulses while the 2 mA supply current preserves battery hours. The 72 dB SINAD gives the metrology path headroom to claim 12-bit effective resolution, while the SPI bus drops cleanly into ARM Cortex microcontroller DMA channels for buffer-based acquisition. The TSOT-23-8 height profile is critical in handheld housings where analog probe-area boards are often less than 10 mm wide. Different speed grades - the LTC2362ITS8 at 200 ksps, LTC2361HTS8 at 500 ksps, and the LTC2365HTS8 at 1 Msps - share the same pinout, so the same PCB layout can be reused across instrument SKUs that simply differ in maximum sample rate.
Recomendado
Wireless Sensor Node Data Front-End
For IoT wireless sensor nodes, the LTC2365HTS8 serves as the analog bridge to BLE, LoRa, or Sub-GHz radio SoCs by digitizing temperature, pressure, or motion sensor outputs and then placing itself in nap mode between transmissions. The microamp sleep current extends battery life to multi-year timescales, while the deterministic SAR latency simplifies the radio protocol scheduler (no long sigma-delta group delay to mask). The TSOT-23-8 footprint adjacent to coin-cell battery rails lets sensors be densely packed without cross-board analog noise coupling. Pin-compatibility with the LTC2361HTS8 and LTC2362ITS8 lets the same hardware support different sensor data rates and power targets - a useful engineering flexibility for production families that span low-power and high-throughput variants.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LTC2365HTS8 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LTC2365ITS8 | LTC2365CTS8 | LTC2361HTS8 | LTC2362ITS8 | LTC2360HTS8 | LTC2312HTS8-14 |
|---|---|---|---|---|---|---|---|
| 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 | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 14 bits |
| Max Sample Rate | 1 Msps | 500 ksps | 200 ksps | 500 ksps | 200 ksps | 100 ksps | 500 ksps |
| Supply Current at 1 Msps | 2 mA | 1.7 mA | 1.5 mA | 1.7 mA | 1.5 mA | 1.3 mA | 2.3 mA |
| SINAD (at full speed) | 72 dB | 73 dB | 73 dB | 72 dB | 72 dB | 72 dB | 78 dB |
| THD (at full speed) | -80 dB | -82 dB | -82 dB | -80 dB | -80 dB | -80 dB | -86 dB |
| Supply Voltage | 2.5 V or 3 V | 2.5 V or 3 V | 2.5 V or 3 V | 2.5 V or 3 V | 2.5 V or 3 V | 2.5 V or 3 V | 2.5 V or 3 V |
| Digital Interface | SPI/QSPI/MICROWIRE serial | SPI/QSPI/MICROWIRE serial | SPI/QSPI/MICROWIRE serial | SPI/QSPI/MICROWIRE serial | SPI/QSPI/MICROWIRE serial | SPI/QSPI/MICROWIRE serial | SPI/QSPI/MICROWIRE serial |
Diferenciadores clave
- Highest sample rate (1 Msps) in the TSOT-23-8 SAR ADC family (frente a LTC2365ITS8)
- Same-PCB compatibility across speed grades (frente a LTC2360HTS8)
- Compact TSOT-23-8 vs typical SOIC-8 SAR ADC footprint (frente a LTC2348HLX-18 (or other SOIC/MSOP SAR ADCs))
Notas de diseño
Place a 0.1 uF X7R ceramic bypass capacitor as close as possible to the VDD pin (pin 3) of the LTC2365HTS8, with the lead length shortened to < 2 mm to minimize series inductance. Add a separate 10 uF bulk cap on the same supply rail. According to the Analog Devices datasheet 23656fb, when the ADC is entering or exiting the nap/shutdown state, the VREF pin should remain stable and not be re-initialized. Best practice: route the analog VDD net from the LDO output through a ferrite bead, not directly from a switching node, to keep ripple below the ADC's 72 dB SINAD floor.
In a TSOT-23-8 footprint, the thermal pad (center pin / exposed thermal pad if used in your PCB footprint) should be tied to analog GND rather than digital GND - this grounds the lead frame and minimizes coupling between digital I/O and the analog reference. Keep the analog input trace (pin 1) as short as possible, ideally less than 5 mm, and route it on a different layer from the SCK/SDO/CONV digital signals. Reference layout note: use a ground pour directly under the TSOT-23 package and stitch ground vias along the input trace perimeter for best noise immunity.
Drive the CONV (pin 8) and CS (pin 7) lines with clean MCU GPIO and avoid using long cables for SCK - any overshoot on SCK directly propagates into the ADC timing budget. Estimated: a 50 MHz SPI host with 5 ns SCK rise time can tolerate SCK trace lengths up to ~50 mm over a stripline, but anything beyond this should be terminated with 33 ohm series resistors. When reading SDO, the host should sample on the SCK rising edge (per the LTC2365 timing diagram in datasheet 23656fb); timing violations typically cause bit shifts in the MSB position rather than visible errors.
Do not operate the LTC2365HTS8 with a floating or unstable VREF - the input range is 0 V to VREF, and any drift on VREF directly enters the digitized LSB value. Note: never hot-plug the analog input above VDD into an unpowered ADC - the input ESD diodes can forward-bias and latch the part into a high-current state. If the analog source has DC content near VREF, add a 100 ohm series resistor at the analog input to limit in-rush. According to manufacturer guidance, latch-up and ESD damage from unpowered analog hot-plug are the most common field-failure modes for TSOT-23 SAR ADCs.
Información de cumplimiento
RoHS compliant per Analog Devices product page. #TRMPBF suffix denotes Pb-free taping on 7-inch reel, matte tin finish, and reflow-peak compatibility to 260C for 30 seconds. Not AEC-Q100 qualified at the H-grade level - select an automotive-grade -KGD or -Q option if AEC-Q100 is required.
