Analog Devices Inc. ADT7316ARQ

Overview

ADT7316ARQ from Analog Devices is a ±0.5°C accurate digital temperature sensor with integrated quad 12-bit voltage-output DACs, operating from 2.7 V to 5.5 V supply. It features buffered rail-to-rail analog outputs (VOUT-A/B/C/D), internal 2.28 V reference, and simultaneous update capability via LDAC pin - used in thermal monitoring and precision bias control for PC power management subsystems.

For engineers reviewing the ADT7316ARQ datasheet, ADT7316ARQ pinout, ADT7316ARQ application, or ADT7316ARQ equivalent, this device supports dual serial interfaces (I²C/SMBus and SPI/QSPI/MICROWIRE), delivers 0 V to 2×VREF output range with 8–10 μs settling time, and integrates on-chip temperature sensing with 10-bit resolution (0.25°C step) across −40°C to +120°C.

Technical Context

The ADT7316ARQ combines a bandgap-based 10-bit ADC for internal temperature measurement and four independent 12-bit string DACs with on-chip rail-to-rail output amplifiers. Its dual-reference architecture allows separate VREF-AB and VREF-CD pins, enabling differential or split-reference configurations for DAC pairs A/B and C/D.

It implements round-robin channel scanning (VDD, internal temp, external temp), supports both fast and slow ADC modes (134 μs to 11.4 ms conversion times), and includes programmable over-limit interrupts via open-drain INT/INT pin. Power-down mode draws <10 μA while retaining register state.

Key Specifications

Pinout & Package

ADT7316ARQ is housed in a 16-lead QSOP package (5.3 mm × 10.2 mm, 0.65 mm pitch) with exposed pad for thermal performance. All analog outputs are buffered and rail-to-rail capable.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar temperature-sensing + multi-channel DAC applications.

Compared with ADT7316ARQ, ADT7317ARQ offers identical thermal performance but trades 12-bit DAC precision for lower cost and power, while ADT7318ARQ further reduces resolution and accuracy - making ADT7316ARQ the optimal choice for applications demanding highest DAC fidelity alongside precision temperature sensing.

Availability

ADT7316ARQ is available at Aetrix Electronics and suitable for PC power management, industrial process monitoring, telecom thermal control, and test equipment calibration requiring stable component supply and long-lifecycle support.

Supply support for ADT7316ARQ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The ADT7316ARQ belongs to Analog Devices' precision temperature sensor and integrated DAC product line, designed specifically for systems requiring co-located thermal monitoring and multi-channel analog control in space-constrained environments.

FAQ

What is the temperature accuracy specification of the ADT7316ARQ over its full operating range?

The ADT7316ARQ guarantees ±0.5°C accuracy over 0°C to +85°C when powered from 3.3 V ±10%. At −40°C to +120°C, accuracy degrades to ±2°C (min) / ±5°C (max). This specification applies to the internal bandgap sensor with averaging enabled and is validated per Analog Devices Rev. B datasheet Table 1.

Does the ADT7316ARQ support simultaneous update of all four DAC outputs?

Yes, the ADT7316ARQ supports simultaneous DAC output update via its dedicated LDAC pin (Pin 9) or through software-controlled LDAC function. A falling edge on LDAC transfers data from input registers to DAC registers across all four channels, ensuring coherent analog output transitions critical for multi-channel control loops.

Can the ADT7316ARQ operate with only the internal reference, or does it require external reference connections?

The ADT7316ARQ can operate fully with its internal 2.28 V reference - no external reference is required. VREF-AB and VREF-CD pins may be left unconnected when using internal reference. External references are optional and used only when higher precision, custom scaling, or dual-reference isolation is needed.

What serial interfaces does the ADT7316ARQ support, and are they mutually exclusive?

The ADT7316ARQ supports both I²C/SMBus (2-wire) and SPI/QSPI/MICROWIRE (4-wire) interfaces on shared pins (SCL/SCLK, SDA/DIN, DOUT/ADD). They are not mutually exclusive - interface selection is determined by CS pin state (high = I²C, low = SPI) and protocol timing, allowing flexible host integration without hardware changes.

Is the ADT7316ARQ pin-compatible with other members of the ADT7316/ADT7317/ADT7318 family?

Yes, the ADT7316ARQ is fully pin-compatible and footprint-compatible with ADT7317ARQ and ADT7318ARQ in the 16-lead QSOP package. All share identical pin functions, electrical characteristics (except DAC resolution and linearity), and register maps - enabling drop-in replacement where DAC resolution requirements align.