Analog Devices Inc. AD7816ARMZ-REEL7

Overview

AD7816ARMZ-REEL7 from Analog Devices is a 10-bit, single-channel analog-to-digital converter with integrated temperature sensor, 9 μs conversion time for VIN1, and on-chip 2.5 V reference. It operates from 2.7 V to 5.5 V and delivers ±2°C temperature measurement accuracy across −40°C to +85°C - used in battery charging systems requiring ambient thermal monitoring and voltage digitization.

For engineers reviewing the AD7816ARMZ-REEL7 datasheet, AD7816ARMZ-REEL7 pinout, AD7816ARMZ-REEL7 application, or AD7816ARMZ-REEL7 equivalent, key selection criteria include its single-ended analog input architecture, overtemperature indicator (OTI) output, auto power-down at 4 μW (10 SPS), and compatibility with Intel 8051/Motorola SPI serial protocols.

Technical Context

The AD7816ARMZ-REEL7 implements a successive approximation ADC core with capacitor DAC architecture and inherent track-and-hold functionality. Its conversion timing is fixed at 9 μs for channel voltage inputs and 27 μs for the on-chip temperature sensor, with acquisition time of 400 ns after channel change or end-of-conversion.

It features dual-reference operation: internal 2.5 V ±1% reference (shut down when external REFIN is applied), and supports external 2.5 V reference via dedicated REFIN pin. The OTI pin asserts logic low when Channel 0 (temperature sensor) output exceeds the programmable overtemperature register value.

Key Specifications

Pinout & Package

AD7816ARMZ-REEL7 is housed in a narrow-body 8-lead SOIC package (SOIC_N), pin-compatible with AD7818. Pin functions are validated per Analog Devices Rev. E datasheet Figures 4–5 and Tables 4–5.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit ADC with integrated temperature sensor applications.

Compared with AD7818ARMZ and MCP3001-I/P, AD7816ARMZ-REEL7 uniquely combines single-channel voltage conversion, ±2°C thermal sensing, OTI alarm, and on-chip reference in an 8-pin SOIC - eliminating four external components while maintaining identical timing and MCU interface compatibility.

Availability

AD7816ARMZ-REEL7 is available at Aetrix Electronics and suitable for battery charging systems, industrial process controllers, and automotive cabin climate modules requiring stable component supply and long-term production continuity.

Supply support for AD7816ARMZ-REEL7 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, Inc. is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.

AD7816ARMZ-REEL7 belongs to the AD7817/AD7818 family of 10-bit ADCs designed for embedded thermal-aware data acquisition - targeting applications where space, power, and integration density are critical constraints.

FAQ

What is the primary function of the AD7816ARMZ-REEL7?

The AD7816ARMZ-REEL7 is a 10-bit analog-to-digital converter with an integrated temperature sensor, designed to digitize single-ended analog voltages (0 V to 2.5 V) and measure ambient temperature with ±2°C accuracy. Its core function is simultaneous voltage and thermal sensing in compact, low-power systems - making AD7816ARMZ-REEL7 ideal for battery management and industrial monitoring where component count must be minimized.

Does the AD7816ARMZ-REEL7 require an external reference voltage?

No, the AD7816ARMZ-REEL7 includes an on-chip 2.5 V ±1% reference that is active by default. The internal reference shuts down automatically when an external reference is applied to the REFIN pin - but AD7816ARMZ-REEL7 uses the GND/VIN/SCLK/RD/WR/DIN-OUT pinout of the AD7818 variant, which does not expose REFIN. Therefore, AD7816ARMZ-REEL7 operates exclusively with its internal reference, eliminating external reference components.

How does the overtemperature indicator (OTI) work on the AD7816ARMZ-REEL7?

The OTI pin on AD7816ARMZ-REEL7 is an active-low, open-drain output that asserts when the digitized temperature reading from Channel 0 exceeds the value stored in the on-chip overtemperature register (OTR). It resets automatically after a serial read operation (rising edge of RD/WR). This hardware-level alarm allows immediate system response - such as disabling a charger - without waiting for MCU polling, enhancing safety in AD7816ARMZ-REEL7-based designs.

What is the conversion time for temperature measurement on the AD7816ARMZ-REEL7?

The AD7816ARMZ-REEL7 requires 27 μs to complete a temperature conversion on Channel 0, as confirmed in the Rev. E datasheet Table 1 under "Conversion Time – Temperature Sensor." This is longer than the 9 μs required for VIN1 voltage conversion due to thermal settling and sensor readout overhead - a fixed timing parameter that must be accounted for in firmware scheduling when using AD7816ARMZ-REEL7 for thermal monitoring.

Is the AD7816ARMZ-REEL7 pin-compatible with other devices in the AD7817/AD7818 family?

Yes, AD7816ARMZ-REEL7 shares the exact 8-lead SOIC pinout and signal mapping of the AD7818ARMZ, including CONVST, OTI, GND, VIN, VDD, RD/WR, SCLK, and DIN/OUT. It is not compatible with the 16-lead AD7817. This pin-for-pin equivalence with AD7818ARMZ enables direct substitution in existing layouts - a key advantage confirmed in Analog Devices' ordering guide and functional block diagrams for AD7816ARMZ-REEL7.