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Analog Devices Inc. AD7816ARMZ
- Part No.:
- AD7816ARMZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog and Digital Output
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7816ARMZ.pdf
- Description:
- IC ADC 10BIT W/TEMP SNSR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,321
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Product details
Overview
AD7816ARMZ from Analog Devices is a 10-bit, single-channel analog-to-digital converter with integrated temperature sensor, 9 μs conversion time, on-chip 2.5 V reference (±1%), and −40°C to +85°C accuracy of ±2°C. It operates from 2.7 V to 5.5 V and delivers 4 μW power at 10 SPS for ambient temperature–aware data acquisition in industrial control systems.
For engineers reviewing the AD7816ARMZ datasheet, AD7816ARMZ pinout, AD7816ARMZ application, or AD7816ARMZ equivalent, key selection criteria include its single-ended VIN input, OTI overtemperature alert output, BUSY status signaling, and compatibility with SPI/MICROWIRE/8051 serial interfaces in resource-constrained embedded monitoring designs.
Technical Context
The AD7816ARMZ implements a successive approximation ADC architecture with capacitor DAC core, inherent track-and-hold functionality, and an internal clock oscillator-eliminating external timing components. Its temperature sensor is accessed via Channel 0 and provides 0.25°C resolution with digital comparison against an on-chip overtemperature register.
Conversion is initiated by a falling edge on CONVST; BUSY goes high during conversion and returns low upon completion. The serial interface uses RD/WR to distinguish read/write operations and supports flexible data framing for microcontroller integration without protocol translation hardware.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1,024 discrete output codes for precise voltage and temperature digitization. |
| Conversion Time | 9 μs for analog channel, 27 μs for temperature sensor - enables up to ~100 kSPS throughput in burst mode. |
| Temperature Accuracy | ±2°C from −40°C to +85°C - meets industrial ambient sensing requirements without calibration. |
| Supply Range | 2.7 V to 5.5 V - supports direct connection to 3.3 V or 5 V system rails without LDO. |
| On-Chip Reference | 2.5 V ±1% - eliminates external reference IC and reduces BOM count and layout area. |
| Power at 1 kSPS | 40 μW - enables battery-powered or energy-harvested sensor nodes with multi-year operation. |
| Interface Protocol | SPI-/MICROWIRE-/8051-compatible serial - integrates with common MCU peripherals without custom driver logic. |
Pinout & Package
AD7816ARMZ is housed in a narrow-body 8-lead MSOP package (3.0 mm × 3.0 mm, 0.65 mm pitch), optimized for space-constrained PCB layouts while maintaining thermal performance up to +125°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONVST | Convert Start Input | Falling-edge-triggered control signal that initiates conversion and places track-and-hold into hold mode. |
| BUSY | Conversion Status Output | Active-high open-drain signal indicating ongoing A/D conversion; used for polling or interrupt-driven firmware. |
| OTI | Overtemperature Indicator | Active-low output asserting when Channel 0 (temperature sensor) reading exceeds user-programmed threshold. |
| CS | Chip Select Input | Enables serial port for multi-device bus sharing; required only when multiple SPI slaves are present. |
| VIN | Analog Input Channel | Single-ended input referenced to GND, accepting 0 V to 2.5 V signals - matches on-chip reference range. |
| VDD | Positive Supply | 2.7 V–5.5 V power rail; powers both analog and digital sections - no separate AVDD/DVDD required. |
| GND | Ground Terminal | Common analog/digital ground pin - simplifies layout by eliminating AGND/DGND separation. |
| DIN/OUT | Serial Data I/O | Three-state bidirectional pin carrying command and result data; reduces pin count vs. separate DIN/DOUT. |
| SCLK | Serial Clock Input | Master-generated clock synchronizing all serial transfers; data latched on rising edge, output on falling edge. |
| RD/WR | Read/Write Direction Control | Logic-high = read (DIN/OUT outputs data), logic-low = write (DIN/OUT accepts command byte). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated temperature sensor | Direct access via Channel 0 with ±2°C accuracy across −40°C to +85°C - enables self-contained thermal monitoring without external sensors. |
| Auto power-down mode | Enters ultra-low-power state automatically after conversion completes - cuts supply current to ≤4.5 μA at 3 V, extending battery life. |
| On-chip 2.5 V reference | Stable ±1% initial tolerance and 30 ppm/°C tempco - ensures consistent full-scale definition across temperature without external trimming. |
| Overtemperature indicator (OTI) | Dedicated hardware comparator comparing Channel 0 result against programmable 8-bit OTR register - provides fail-safe thermal alert without CPU intervention. |
| Inherent track-and-hold | No external sample-hold circuit needed - acquisition time of 400 ns allows accurate sampling of fast-changing inputs before conversion begins. |
Applications
| Industrial Process Monitoring | Automotive Cabin Climate Control |
|---|---|
|
Use Scenario: Real-time monitoring of motor winding temperature and supply rail voltage in PLC I/O modules. IC Role / Device Role / Timing Role: Single-channel ADC digitizes analog feedback signals while concurrently measuring local die temperature to detect thermal runaway. Use Value: Eliminates need for separate temperature sensor and reference IC, reducing component count and enabling predictive maintenance alerts via OTI pin. |
Use Scenario: Closed-loop HVAC control using cabin air temperature and blower motor voltage feedback. IC Role / Device Role / Timing Role: AD7816ARMZ samples thermistor voltage and motor voltage sequentially, with temperature data used to adjust PWM duty cycle. Use Value: On-chip temperature sensor accuracy (±2°C) meets automotive interior thermal comfort specifications without calibration overhead. |
| Battery Management Systems | Smart Building Environmental Sensors |
|
Use Scenario: Monitoring cell voltage and pack temperature in portable Li-ion battery packs. IC Role / Device Role / Timing Role: AD7816ARMZ converts battery voltage on VIN and ambient temperature on Channel 0, triggering charge termination or thermal shutdown. Use Value: 40 μW power at 1 kSPS enables continuous monitoring during standby without compromising battery runtime. |
Use Scenario: Wireless node measuring room temperature and light-level voltage from photoresistor. IC Role / Device Role / Timing Role: Low-power ADC digitizes analog sensor outputs and asserts OTI if enclosure exceeds safe operating temperature. Use Value: MSOP-8 footprint and 3.0 mm × 3.0 mm size fit compact PCBs in battery-powered Zigbee/Thread endpoints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit temperature-sensing ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7818ARMZ | Same die, identical pinout and electrical specs; AD7816ARMZ is rebranded AD7818 per Analog Devices' ordering guide. | No functional difference - both support single-channel conversion, on-chip temperature sensor, and MSOP-8 package. | Select AD7818ARMZ if sourcing from distributors listing that part number; AD7816ARMZ and AD7818ARMZ are functionally interchangeable. |
| MAX1270BCPP+ | 12-bit resolution, 10 μs conversion, but no integrated temperature sensor; requires external reference and thermal sensing circuitry. | Suitable where higher resolution is prioritized over integrated thermal monitoring and board space is not constrained. | Choose MAX1270BCPP+ only when 12-bit precision is mandatory and system-level temperature sensing is already implemented externally. |
Compared with AD7816ARMZ, AD7818ARMZ offers identical functionality and drop-in compatibility, while MAX1270BCPP+ trades integrated temperature sensing and lower power for higher resolution-making it appropriate only when thermal monitoring is handled elsewhere and 12-bit quantization is essential.
Availability
AD7816ARMZ is available at Aetrix Electronics and suitable for industrial process control, automotive cabin monitoring, and battery management systems requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for AD7816ARMZ 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD7816ARMZ belongs to the AD7817/AD7818 family of integrated temperature-sensing ADCs designed specifically for compact, low-power data acquisition in industrial and automotive environments where simultaneous voltage and ambient temperature measurement is required.
FAQ
What is the function of the OTI pin on the AD7816ARMZ?
The OTI (Overtemperature Indicator) pin on the AD7816ARMZ is an active-low output that asserts when the digitized temperature reading from Channel 0 exceeds the value stored in the on-chip overtemperature register. This hardware-level alert eliminates software polling and enables immediate system-level thermal response. The OTI pin resets automatically after a serial read operation completes, ensuring reliable edge-triggered handling in firmware for AD7816ARMZ-based designs.
Does the AD7816ARMZ require an external reference voltage?
No, the AD7816ARMZ does not require an external reference voltage because it integrates a precision 2.5 V reference with ±1% initial accuracy and 30 ppm/°C temperature coefficient. The on-chip reference is enabled by default and automatically disables if an external reference is applied to the REFIN pin - though AD7816ARMZ lacks a dedicated REFIN pin, confirming its fixed internal reference architecture. This simplifies design and improves system stability for AD7816ARMZ implementations.
How many analog input channels does the AD7816ARMZ support?
The AD7816ARMZ supports one single-ended analog input channel (VIN), consistent with its AD7818 lineage. Unlike the 4-channel AD7817, the AD7816ARMZ is strictly a single-channel device - confirmed by its 8-pin MSOP package, functional block diagram, and pinout showing only one VIN terminal. Channel 0 is reserved for the integrated temperature sensor, and the sole external analog input is accessed via the VIN pin in AD7816ARMZ applications.
What serial interface protocols are supported by the AD7816ARMZ?
The AD7816ARMZ supports SPI-, MICROWIRE-, and Intel 8051-compatible serial interfaces through its DIN/OUT, SCLK, RD/WR, and CS pins. Data is clocked in on the rising edge of SCLK and out on the falling edge, with RD/WR determining direction. This multi-protocol compatibility allows direct connection to diverse microcontrollers without level shifters or protocol converters, streamlining firmware development for AD7816ARMZ-based sensor nodes and control systems.
What is the operating temperature range of the AD7816ARMZ?
The AD7816ARMZ operates over an ambient temperature range of −40°C to +85°C, with guaranteed temperature measurement accuracy of ±2°C across that span. Its junction temperature rating extends to +125°C, supporting deployment in thermally demanding enclosures. The on-chip temperature sensor itself functions from −55°C to +125°C, providing headroom beyond ambient specifications - a critical capability verified in AD7816ARMZ datasheet characterization and application notes.
AD7816ARMZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Sensor Type:
- Digital, Local
- Sensing Temperature - Local:
- -40°C ~ 85°C
- Sensing Temperature - Remote:
- -
- Output Type:
- SPI
- Voltage - Supply:
- 2.7V ~ 5.5V
- Resolution:
- 10 b
- Features:
- -
- Accuracy - Highest (Lowest):
- ±2°C (±3°C)
- Test Condition:
- 25°C (-40°C ~ 85°C)
- Operating Temperature:
- -55°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-MSOP
AD7816ARMZ FAQ
1.How can I place an order for AD7816ARMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7816ARMZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD7816ARMZ reliable?
The price and inventory of AD7816ARMZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7816ARMZ is usually 5 days.
3.What payment methods are accepted for AD7816ARMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7816ARMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7816ARMZ?
AD7816ARMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7816ARMZ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD7816ARMZ?
For technical support, including AD7816ARMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7816ARMZ requirements.
6.How does Aetrix verify that AD7816ARMZ is sourced from the original manufacturer or authorized distributors?
All AD7816ARMZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7816ARMZ meets industry standards.
7.What is the process for return or replacement of AD7816ARMZ?
All AD7816ARMZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7816ARMZ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD7816ARMZ part is unused and in its original packaging.
Return procedure for AD7816ARMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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