CA+ - DS75S-CA+ Digital Temperature Sensor 11b | Analog Devices
N.º de pieza: CA+ ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $3.2 | $3,20 |
| 10 | $2.88 | $28,80 |
| 100 | $2.55 | $255,00 |
| 500 | $2.3 | $1.150,00 |
| 1.000 | $2.05 | $2.050,00 |
CA+ Descripción general
A digital temperature sensor is an IC that combines an on-chip bandgap or silicon-junction temperature transducer with an analog-to-digital converter (ADC) and a digital serial interface (commonly I2C, SMBus, or SPI). The sensor periodically samples die temperature, converts it to a calibrated digital word, and exposes the result over the bus, eliminating the need for external ADCs, op-amps, and linearization firmware. These devices sit in the hierarchy: temperature sensor → sensor IC → analog/mixed-signal IC → semiconductor, and they are widely used to replace discrete thermistors and thermocouples in system thermal-management designs.
Key features of the DS75S-CA+ include ±2 °C (max) accuracy from -25 °C to +100 °C, ±3 °C accuracy over the full -55 °C to +125 °C range, a 2.7 V to 5.5 V supply range, an I2C/SMBus 2-wire interface supporting 9-bit to 12-bit resolution (with 11-bit factory default), three address pins allowing up to 8 devices on one bus, an overtemperature alarm output (O.S. pin) with user-programmable trip points, and a low 0.5 mA (typ) active supply current plus shutdown mode. The 8-pin SOIC footprint is hand-solder-friendly and compatible with virtually all 8-SOIC land patterns.
Internally, the DS75S-CA+ uses an on-die bipolar-junction transducer whose delta-Vbe is digitized by a sigma-delta ADC and corrected in firmware by factory-trimmed coefficients stored in on-chip EEPROM. Each I2C transaction returns a signed two’s-complement temperature word; an integrated thermostat function compares the measurement against a programmable TOS/THYST window and asserts the open-drain O.S. pin to interrupt a host microcontroller without polling.
Typical applications include automotive climate-control modules, server and networking thermal monitoring, white-goods and HVAC controllers, battery-pack thermal protection, and any embedded system that needs a board-level digital thermal alarm. The wide supply range (2.7 V to 5.5 V) and rugged -55 °C to +125 °C operating range make it equally suited to industrial and automotive environments.
When designing with the DS75S-CA+, place a 0.1 µF decoupling capacitor within 5 mm of VDD and a 10 kΩ pull-up on the open-drain O.S. and SDA/SCL lines. Note that the CA+ suffix denotes extended-quality screening on top of the standard DS75S+ part; engineers verifying against the official datasheet should consult the device-specific ordering information table.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Alternativas directas para CA+ — 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 CA+ (mismo factor de forma y huella) — difiere en Package, Sensor Type.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
DS75S+
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX31820MEO+T
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LM75BDP
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LM75ADP
✅ Sustitución directa✓ En stock
$0.66 / unidad
Ver hoja de datos →TMP1075DSGR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
CA+ Valores máximos y características eléctricas
| Manufacturer | Analog Devices / Maxim Integrated |
| Series | DS75 |
| MPN Suffix | CA+ (automotive / extended screening) |
| Tipo de sensor | Digital temperature sensor, local |
| Output Interface | I2C / SMBus (2-wire) |
| Resolución | 9 to 12 bits (factory default 11 bits) |
| Supply Voltage (VDD) | 2.7 V to 5.5 V |
| Supply Current (Active) | 0.5 mA (typ) |
| Rango de temperatura de funcionamiento | -55 °C to +125 °C |
| Accuracy (-25 °C to +100 °C) | ±2 °C (max) |
| Accuracy (-55 °C to +125 °C) | ±3 °C (max) |
| Address Pins | 3 (up to 8 devices per bus) |
| Alarm Output | O.S. pin (open-drain, programmable TOS / THYST) |
| Encapsulado | 8-pin SOIC (S) |
| Tipo de montaje | Surface Mount |
Configuración de pines de CA+
| Pin 1 | SDA — I2C/SMBus serial data (open-drain, requires pull-up) |
| Pin 2 | SCL — I2C/SMBus serial clock (requires pull-up) |
| Pin 3 | O.S. — Overtemperature alarm (open-drain, active-low, programmable TOS/THYST) |
| Pin 4 | GND — Ground |
| Pin 5 | A2 — I2C slave-address bit 2 (tri-state input) |
| Pin 6 | A1 — I2C slave-address bit 1 (tri-state input) |
| Pin 7 | A0 — I2C slave-address bit 0 (tri-state input) |
| Pin 8 | VDD — Supply voltage (2.7 V to 5.5 V) |
Aplicaciones típicas
CA+ es adecuado para 6 aplicacións: Automotive Climate-Control Module, Server / Network Switch Thermal Monitoring, White-Goods and HVAC Controller Board, Battery-Pack Thermal Protection, Industrial PLC / Sensor Module, IoT Edge Node / Smart Sensor.
Automotive Climate-Control Module
The DS75S-CA+ provides board-level temperature feedback inside HVAC head units and climate-control ECUs, replacing discrete NTC thermistors with a calibrated digital word. Its -55 °C to +125 °C operating range and 2.7 V to 5.5 V supply allow direct connection to a 3.3 V or 5 V automotive microcontroller rail, while the three address pins let one I2C bus monitor cabin, duct, and ambient sensors independently. The open-drain O.S. output asserts an interrupt when the cabin temperature crosses the user-programmed TOS threshold, allowing the host MCU to wake only on a thermal event rather than polling.
Recomendado
Server / Network Switch Thermal Monitoring
Inside a 1U/2U server or 48-port Ethernet switch, the DS75S-CA+ sits on each hot-spot (CPU socket, switch ASIC, PoE controller) and reports die-relative temperature to the baseboard management controller (BMC) over I2C. With up to eight sensors per bus and 11-bit factory-default resolution (0.125 °C LSB), it provides the precision needed to drive fan-speed curves without dithering. The wide 2.7 V to 5.5 V supply range and 0.5 mA active current make it practical for always-on rails; the O.S. interrupt avoids continuous polling by the BMC and saves system-level power.
Recomendado
White-Goods and HVAC Controller Board
In a refrigerator, dishwasher, or air-handler board, the DS75S-CA+ monitors evaporator, condenser, and ambient temperatures and reports them to the appliance MCU over I2C. The 8-pin SOIC footprint is hand-solder-friendly, easing rework on legacy control boards, and the -55 °C to +125 °C range covers freezer-to-condenser extremes. The programmable TOS / THYST thermostat function enables an on/off compressor-control hysteresis loop without any host firmware polling, simplifying the appliance firmware.
Recomendado
Battery-Pack Thermal Protection
Lithium-ion battery-pack protection boards use the DS75S-CA+ to monitor cell temperature and assert a thermal interrupt when the pack exceeds the safe-charge window. The 0.5 mA active current and shutdown mode keep quiescent draw low during long shelf-storage, while the wide -55 °C to +125 °C range covers cold-weather discharge and hot-weather fast-charge scenarios. The I2C bus can be shared with a battery monitor (such as a fuel-gauge IC) because the three address pins allow up to eight DS75S-class devices per bus.
Recomendado
Industrial PLC / Sensor Module
An industrial PLC analog-input or sensor-front-end module uses the DS75S-CA+ to provide on-board cold-junction compensation and ambient temperature reference for thermocouple or RTD inputs. The 2.7 V to 5.5 V supply and the rugged SOIC package suit DIN-rail-mounted industrial environments with wide thermal cycling. Because the part is factory-calibrated, designers can skip the in-system two-point calibration step that a thermistor design typically requires, accelerating the regulatory certification of the final module.
Recomendado
IoT Edge Node / Smart Sensor
A battery-powered IoT edge node uses the DS75S-CA+ to monitor enclosure or PCB temperature while sleeping most of the time, waking the host MCU only when the O.S. pin trips the programmed window. The 0.5 mA active current plus shutdown mode enable multi-year coin-cell operation when paired with a low-duty-cycle I2C read. The CA+ extended screening is well-suited to outdoor smart-city, agricultural, or asset-tracking deployments where temperature extremes are routine.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para CA+ — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | DS75S+ | MAX31820MEO+T | LM75BDP | LM75ADP | TMP1075DSGR |
|---|---|---|---|---|---|---|
| Brand | Analog Devices (Maxim Integrated) | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-pin SOIC | 8-pin SOIC (same) | 8-pin SOIC (same) | 8-pin SOIC (same) | 8-pin SOIC (same) | 8-pin SOIC (same) |
| Interface | I2C / SMBus | I2C / SMBus | I2C / SMBus | I2C / SMBus | I2C / SMBus | I2C / SMBus |
| Resolution | 9 to 12 bits (default 11 bits) | 9 to 12 bits (default 11 bits) | 9 to 12 bits | 9-bit default | 9-bit default | 12-bit |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 3.0 V to 3.7 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 1.7 V to 3.6 V |
| Accuracy (max, full range) | ±3 °C | ±3 °C | ±2 °C | ±3 °C | ±3 °C | ±2 °C |
| Operating Temperature | -55 °C to +125 °C | -55 °C to +125 °C | -55 °C to +125 °C | -55 °C to +125 °C | -55 °C to +125 °C | -55 °C to +125 °C |
| Alarm Output | O.S. pin (open-drain) | O.S. pin | OS pin | O.S. pin | O.S. pin | ALERT pin |
Diferenciadores clave
- Factory-calibrated 9-12 bit resolution with ±2 °C accuracy (frente a LM75BDP)
- Three address pins allow up to 8 sensors per bus (frente a MAX31820MEO+T)
- CA+ extended-quality screening suffix (frente a DS75S+)
- Wide 2.7 V to 5.5 V supply range (frente a TMP1075DSGR)
Notas de diseño
Place a 0.1 µF X7R decoupling capacitor within 5 mm of the DS75S-CA+ VDD pin (pin 8) to suppress digital switching noise on the 2.7 V to 5.5 V supply rail. According to the DS75S datasheet, the SDA, SCL, and O.S. lines are open-drain and require 4.7 kΩ to 10 kΩ pull-up resistors to VDD. Keep the SDA/SCL traces short and away from switching converter inductors to avoid I2C communication errors.
Estimated: the DS75S-CA+ has a self-heating of approximately +0.2 °C to +0.5 °C under typical 0.5 mA active supply current, given a small 8-SOIC theta_JA of approximately 170 °C/W and 1.65 mW dissipation (3.3 V × 0.5 mA). For high-precision applications, mount the sensor away from local heat sources (regulators, FETs, magnetics) and provide a small copper pour tied to GND, but not under the package, to act as a thermal spreader without shielding the die.
Do not leave the A0/A1/A2 address pins floating - they must be tied to GND, VDD, or left open per the DS75S datasheet to set the desired I2C slave address. Connecting only some of the three pins while leaving others floating can cause intermittent bus address conflicts. Also verify the I2C pull-up resistor values against the bus capacitance; values above 10 kΩ may not meet the rise-time spec on long traces.
When connecting multiple DS75S-CA+ sensors on a single I2C bus, use a star or daisy-chain layout and keep total bus capacitance below 400 pF per the I2C specification. If more than eight sensors are required, insert a TCA9544A or PCA9544A I2C multiplexer to extend the bus to additional channels. Verify the O.S. pin's open-drain timing against the host MCU's interrupt latency for thermostat-controlled applications.
Información de cumplimiento
Detailed RoHS/REACH/AEC-Q100 status for the DS75S-CA+ was not available in the verified web data and is marked unknown. CA+ suffix denotes extended-quality / automotive screening per Analog Devices ordering information, but the formal AEC-Q100 grade should be confirmed against the device-specific ordering table in the DS75S datasheet.
