AD7314ARMZ-REEL7 - 10-Bit Digital Temp Sensor | Analog Devices
MPN: AD7314ARMZ-REEL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.748 | $1.75 |
| 10 | $1.58 | $15.80 |
| 100 | $1.42 | $142.00 |
| 500 | $1.28 | $640.00 |
| 1,000 | $1.15 | $1,150.00 |
AD7314ARMZ-REEL7 Overview
A digital temperature sensor is an integrated circuit that converts ambient temperature into a digital output, typically using an internal bandgap reference and an analog-to-digital converter. In the hierarchy of temperature sensing, the AD7314 is a local digital temperature sensor, part of the broader temperature sensor family. Unlike analog sensors that output a voltage or current proportional to temperature, digital sensors provide a direct digital reading, simplifying interface design and improving noise immunity.
Key features include 10-bit resolution with 0.25C LSB, a wide supply range of 2.65V to 5.5V, and low power consumption suitable for battery-powered devices. The serial interface is SPI/QSPI/MICROWIRE compatible, and the device includes a shutdown mode for power saving. The 8-lead MSOP package measures approximately 3mm x 3mm, ideal for portable and space-limited designs.
Technically, the AD7314 uses a bandgap temperature sensor producing a voltage proportional to absolute temperature, digitized by a successive-approximation ADC. The device guarantees accuracy of plus or minus 2C over the full temperature range per the ADI datasheet. A power-on reset ensures valid output immediately after power-up.
Typical applications include temperature monitoring in portable electronics, battery management systems, industrial process control, environmental sensing, and medical devices. Its small footprint and low power suit wearable devices and IoT nodes.
When designing with the AD7314, ensure the supply voltage stays within the specified range and the SPI lines are properly terminated. No external calibration is required, but use adequate supply decoupling (0.1uF ceramic close to the VDD pin) for optimal performance.
Drop-in alternatives for AD7314ARMZ-REEL7 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with AD7314ARMZ-REEL7 (same form factor and footprint) — differing in ADC Type, Accuracy, Interface, Operating Temperature Range, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD7314ARMZ
✅ Drop-In✓ In Stock
$1.88 / Unit
View Datasheet →AD7314ARMZ-REEL
✅ Drop-In📋 Reference alternative (not in catalog)
AD7314ARM-REEL7
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AD7314ARMZ-REEL7
✅ Drop-In✓ In Stock
$1.15 / Unit
View Datasheet →AD7314ARMZ-REEL7 Maximum Ratings & Electrical Characteristics
| Sensor Type | Digital, Local Temperature Sensor |
| Resolution | 10 bit |
| Temperature Resolution (LSB) | 0.25 C |
| Operating Temperature Range | -35 C to +85 C |
| Supply Voltage Range | 2.65 V to 5.5 V |
| Accuracy | +/-2 C over full range |
| Interface | SPI / QSPI / MICROWIRE compatible serial |
| ADC Type | Successive-approximation (SAR) |
| Sensing Element | Bandgap temperature sensor |
| Shutdown Mode | Yes |
| Power-On Reset | Yes |
| Package | 8-Lead MSOP (uSOIC), approx. 3x3 mm |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (REEL7, 7-inch reel) |
| RoHS Status | Compliant (Z suffix) |
| Typical Application | Portable, battery-powered temperature monitoring |
AD7314ARMZ-REEL7 Pin Configuration
| Pin 1 | GND — Ground reference |
| Pin 2 | DOUT — Serial data output (SPI) |
| Pin 3 | CS — Chip select, active low |
| Pin 4 | SCLK — Serial clock input |
| Pin 5 | N/C — No connect |
| Pin 6 | N/C — No connect |
| Pin 7 | VDD — Power supply, 2.65V to 5.5V (decouple with 0.1uF) |
| Pin 8 | GND — Ground |
Typical Applications
AD7314ARMZ-REEL7 is suitable for 6 applications: Portable and Battery-Powered Electronics, Battery Management Systems, Industrial Process Control, IoT and Environmental Sensing Nodes, Medical Device Temperature Monitoring, Fan and Thermal Management Control.
Portable and Battery-Powered Electronics
The AD7314ARMZ-REEL7 fits portable electronics because it combines a wide 2.65V to 5.5V supply range with a shutdown mode and a compact 8-lead MSOP of roughly 3x3mm. Placed near heat-sensitive components and polled over SPI only when needed, it draws minimal average current - the shutdown mode cuts consumption between conversions, extending battery life in handheld instruments and wearables. The 0.25C LSB resolution is ample for thermal protection thresholds, and no external calibration circuitry is required, minimizing BOM cost.
Recommended
Battery Management Systems
In battery packs and chargers, cell temperature directly affects charge safety and lifespan. The AD7314 monitors pack or PCB temperature with 10-bit (0.25C) resolution over -35C to +85C and reports digitally over SPI, avoiding thermistor analog-front-end errors. Its +/-2C guaranteed accuracy supports safe charge-termination thresholds, and the 5.5V maximum supply suits battery-backed rails. A charge controller can gate charging when the reading exceeds safe limits, using the power-on reset to guarantee valid data at power-up.
Recommended
Industrial Process Control
For industrial controllers and PLC I/O modules, the AD7314 provides a local board-temperature reading with a noise-immune digital output, immune to the ground-offset problems of analog sensor signals across long runs. The SPI/QSPI/MICROWIRE-compatible interface attaches directly to existing MCU peripherals, and multiple conversions can be scheduled by the host. Its 2.65V-to-5.5V supply range allows reuse of either 3.3V or 5V industrial logic rails, and the RoHS-compliant MSOP-8 withstands standard reflow assembly in control cabinets.
Recommended
IoT and Environmental Sensing Nodes
IoT sensor nodes benefit from the AD7314's small footprint and low duty-cycle operation: the MCU wakes, clocks a 10-bit conversion over SPI, logs the 0.25C-resolution reading, and returns the sensor to shutdown. The wide 2.65V supply floor permits operation from a single lithium cell through a low-power LDO as the battery discharges. Digital output eliminates ADC channels on the node MCU, freeing analog resources for other sensors such as humidity or light.
Recommended
Medical Device Temperature Monitoring
Diagnostic and monitoring equipment requires dependable local temperature measurement with a clean digital interface. The AD7314's 10-bit output (0.25C LSB) and +/-2C accuracy over -35C to +85C support alarm and compensation functions in patient-side instruments, while its small MSOP-8 fits dense portable medical boards. The SPI interface keeps noisy analog traces off the sensor path, and the power-on reset ensures the first reading after power-up is valid - important for safety-interlock logic.
Recommended
Fan and Thermal Management Control
In networking equipment, servers, and power supplies, the AD7314 provides the temperature feedback loop for fan-speed control. The MCU reads the 10-bit SPI result and adjusts PWM duty to the fan driver; the 0.25C resolution enables smooth, gradual speed curves that reduce acoustic noise versus coarse 1C steps. Shutdown mode allows polling at low duty cycle when the system is idle, and the -35C rating covers unheated telecom outdoor enclosures.
Recommended
Recommended Products Summary
Engineering reference data for AD7314ARMZ-REEL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7314ARMZ | AD7314ARMZ-REEL | AD7314ARM-REEL7 | TMP117-Q1 |
|---|---|---|---|---|---|
| Package | 8-MSOP (uSOIC) | 8-MSOP - same | 8-MSOP - same | 8-MSOP - same | WSON-8 - different |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Resolution | 10 bit (0.25C LSB) | 10 bit (0.25C LSB) | 10 bit (0.25C LSB) | 10 bit (0.25C LSB) | 16 bit (0.0078C LSB) |
| Accuracy | +/-2 C | +/-2 C | +/-2 C | +/-2 C | +/-0.1 C |
| Temperature Range | -35 C to +85 C | -35 C to +85 C | -35 C to +85 C | -35 C to +85 C | -40 C to +125 C |
| Supply Voltage | 2.65 V to 5.5 V | 2.65 V to 5.5 V | 2.65 V to 5.5 V | 2.65 V to 5.5 V | 1.8 V to 5.5 V |
| Interface | SPI / QSPI / MICROWIRE | SPI / QSPI / MICROWIRE | SPI / QSPI / MICROWIRE | SPI / QSPI / MICROWIRE | I2C / SMBus |
| RoHS / Packaging | Compliant, 7-inch reel (REEL7) | Compliant, tube | Compliant, 13-inch reel | Non-RoHS (leaded), 7-inch reel | Compliant, reel |
Key Differentiators
- Complete sensor-plus-ADC integration (vs AD7314ARMZ)
- SPI interface for legacy designs (vs TMP117-Q1)
- RoHS-compliant reel packaging (vs AD7314ARM-REEL7)
Design Notes
Decouple VDD with a 0.1uF ceramic capacitor placed within 5mm of pin 7, with a solid ground return to pins 1 and 8. Because the MSOP-8 measures about 3x3mm, the sensor die reaches thermal equilibrium with the PCB quickly - avoid placing it near power regulators or hot components if measuring ambient temperature; place it near the hotspot if measuring component temperature.
Keep SCLK, DOUT, and CS traces short and route away from switching-regulator nodes. The AD7314 samples on the SPI clock per the ADI datasheet timing; respect the datasheet SCLK frequency and CS setup/hold times. If the bus is long or crosses a connector, add a small series resistor (22-33 ohm) on SCLK to control ringing.
The device operates from 2.65V to 5.5V; do not exceed 5.5V absolute maximum. Use the shutdown mode between conversions in battery designs - issue the shutdown command via the serial interface and re-awaken before the next conversion. The power-on reset guarantees valid output at power-up, but allow the supply to stabilize before the first CS assertion.
Compliance Information
Z suffix indicates RoHS-compliant, lead-free per ADI naming convention. AEC-Q100 status not stated in provided data.
