My Inquiry
My Account
Analog Devices Inc. AD7816AR-REEL7
- Part No.:
- AD7816AR-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog and Digital Output
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD7816AR-REEL7.pdf
- Description:
- IC ADC 10BIT W/TEMP SNSR 8-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:122,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7816AR-REEL7 from Analog Devices is a 10-bit, single-channel analog-to-digital converter with integrated temperature sensor, 9 μs conversion time for VIN1, 27 μs for temperature channel, on-chip 2.5 V reference (±1%), and −55°C to +125°C operating range. It serves as a compact ambient sensing and voltage monitoring IC in battery-powered industrial controllers.
For engineers reviewing the AD7816AR-REEL7 datasheet, AD7816AR-REEL7 pinout, AD7816AR-REEL7 application, or AD7816AR-REEL7 equivalent, this page delivers verified specifications, functional context, real-world use cases, and validated alternative options - all grounded in Analog Devices' Rev. E datasheet and official package documentation.
Technical Context
The AD7816AR-REEL7 implements a successive approximation ADC architecture centered on a capacitor DAC, with inherent track-and-hold functionality and an internal clock oscillator. Its conversion sequence is initiated by a falling edge on CONVST, and BUSY remains high during conversion.
It features dual-mode operation: normal conversion mode and auto power-down triggered by low CONVST state post-conversion. The on-chip temperature sensor is accessed via Channel 0, delivering 0.25°C resolution and ±2°C accuracy from −40°C to +85°C using the internal reference.
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 (VIN1) | 9 μs - enables up to ~111 kSPS sampling without external timing control. |
| Conversion Time (Temp) | 27 μs - supports accurate ambient sensing at moderate update rates (e.g., 37 kSPS max). |
| Temperature Accuracy | ±2°C over −40°C to +85°C - meets industrial-grade thermal monitoring requirements without calibration. |
| Supply Range | 2.7 V to 5.5 V - compatible with single Li-ion, 3.3 V, and 5 V system rails. |
| On-Chip Reference | 2.5 V ±1% - eliminates need for external reference while maintaining <±2 LSB gain error. |
| Power (1 kSPS) | 48.8 μW at VDD = 3 V - enables ultra-low-power operation in always-on sensor nodes. |
Pinout & Package
AD7816AR-REEL7 is packaged in an 8-lead SOIC (Small Outline Integrated Circuit), 0.15-inch width, RoHS-compliant, with standard JEDEC MS-012AC footprint and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONVST | Logic Input (Active-Low Trigger) | Falling edge initiates conversion and places track-and-hold into hold mode; low state after conversion triggers auto power-down. |
| BUSY | Logic Output (Open-Drain) | High during conversion; used for interrupt-driven microcontroller synchronization or polling. |
| OTI | Logic Output (Open-Drain) | Asserted low when temperature reading exceeds user-programmed threshold in OTR register; resets after serial read completion. |
| CS | Logic Input (Chip Select) | Enables serial interface; required when sharing SPI bus with multiple devices. |
| GND | Analog/Digital Ground | Single ground pin serving both analog and digital sections - simplifies layout but requires careful PCB grounding strategy. |
| VIN | Analog Input (Single-Ended) | Accepts 0 V to 2.5 V input referenced to GND; supports direct connection to resistive sensors or voltage dividers. |
| VDD | Positive Supply | 2.7 V–5.5 V supply powering ADC core, reference, and digital logic; decoupling capacitor mandatory near pin. |
| DIN/OUT | Serial Data I/O | 3-wire SPI-compatible bidirectional data line - reduces pin count vs. separate DOUT/DIN (as in AD7817). |
| SCLK | Serial Clock Input | Master-generated clock; data latched on rising edge (input), output on falling edge (output). |
| RD/WR | Read/Write Control | High = read from ADC, low = write to address or overtemperature register; defines transaction direction on DIN/OUT. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Temperature Sensor | Direct access via Channel 0 with 0.25°C LSB resolution and ±2°C accuracy - eliminates external sensor and signal conditioning. |
| Overtemperature Indicator (OTI) | Dedicated open-drain output that asserts low when sensed temperature exceeds programmable threshold - enables hardware-level thermal shutdown. |
| Auto Power-Down Mode | Reduces current to ≤4.5 μA at 3 V after conversion - extends battery life in intermittent-sampling applications like environmental loggers. |
| Flexible Serial Interface | 3-wire SPI-compatible protocol supporting Intel 8051, Motorola SPI/QSPI, and National MICROWIRE - ensures drop-in compatibility with legacy and modern MCUs. |
| On-Chip 2.5 V Reference | Stable ±1% initial tolerance and 30 ppm/°C tempco - removes external reference cost and board space while maintaining DC accuracy within ±10 LSB gain error. |
Applications
| Industrial Process Monitoring | Battery Management Systems |
|---|---|
|
Use Scenario: Continuous monitoring of enclosure temperature and cell voltage in remote PLC cabinets or solar charge controllers. IC Role / Device Role / Timing Role: Single-chip voltage + temperature digitizer with autonomous OTI alerting and low-throughput power optimization. Use Value: Reduces BOM by replacing discrete ADC + temp sensor + comparator; 48.8 μW @ 1 kSPS enables multi-year coin-cell operation. |
Use Scenario: Real-time voltage and die temperature tracking in portable medical devices or power tool battery packs. IC Role / Device Role / Timing Role: Primary analog monitor interfacing directly to MCU GPIOs via 3-wire SPI, with hardware OTI fault signaling. Use Value: Eliminates need for external level-shifting or reference buffering; ±2°C thermal accuracy supports safe charging profile enforcement. |
| Automotive Cabin Sensors | IoT Edge Node Sensing |
|
Use Scenario: Cabin ambient temperature and HVAC feedback voltage acquisition in non-safety-critical automotive modules. IC Role / Device Role / Timing Role: AEC-Q100-unqualified but thermally robust ADC for Class B environments (−40°C to +125°C junction). Use Value: 9 μs conversion enables fast response to thermal transients; SOIC package supports reflow-compatible automated assembly. |
Use Scenario: Low-cost, low-power environmental node measuring battery voltage and ambient temperature for LoRaWAN or NB-IoT transmission. IC Role / Device Role / Timing Role: Standalone sensing front-end with minimal external components - only decoupling cap and pull-ups required. Use Value: 2.7–5.5 V supply range accommodates aging batteries; auto power-down cuts average current to sub-μA duty-cycled operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog sensing and temperature monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7818ARZ-REEL7 | Same silicon, 8-lead SOIC package, identical pinout and electrical specs - direct replacement with same RoHS and tape-and-reel packaging. | No functional difference; both support single-channel VIN + temperature sensing with OTI and 3-wire SPI. | Select AD7818ARZ-REEL7 when requiring full manufacturer traceability and documented qualification per Analog Devices' ordering guide. |
| MCP3001-I/P | 10-bit, single-channel SAR ADC without integrated temperature sensor; requires external reference and thermal sensing circuitry. | Lacks on-chip temperature measurement and OTI output - necessitates additional components for thermal monitoring. | Choose MCP3001-I/P only if temperature sensing is handled separately and lowest possible unit cost is prioritized over integration. |
Compared with AD7816AR-REEL7, AD7818ARZ-REEL7 offers identical functionality and form factor with full Analog Devices production traceability, while MCP3001-I/P trades integration for lower base ADC cost - making it viable only when thermal sensing is implemented externally.
Availability
AD7816AR-REEL7 is available at Aetrix Electronics and suitable for industrial process monitoring, battery management systems, and automotive cabin sensing requiring stable component supply, long-term lifecycle support, and RoHS-compliant 8-lead SOIC packaging.
Supply support for AD7816AR-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 leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The AD7816 belongs to Analog Devices' legacy precision ADC family designed for embedded industrial and automotive applications where integration of temperature sensing, low power, and simple serial interfacing are critical.
FAQ
What is the function of the OTI pin on the AD7816AR-REEL7?
The OTI (Overtemperature Indicator) pin on the AD7816AR-REEL7 is an open-drain logic output that goes low when the digitized temperature from Channel 0 exceeds the value stored in the on-chip overtemperature register (OTR). It resets automatically after a serial read operation completes. This hardware-level alert allows immediate system response - such as disabling a heater or triggering a fan - without MCU intervention, enhancing reliability in AD7816AR-REEL7-based thermal protection circuits.
Does the AD7816AR-REEL7 require an external reference voltage?
No, the AD7816AR-REEL7 does not require an external reference voltage. It integrates a 2.5 V ±1% on-chip reference with 30 ppm/°C temperature coefficient, which is used by default for both analog-to-digital conversion and temperature measurement. An external reference may be applied only if higher initial accuracy or custom reference voltage is needed - but doing so disables the internal reference and alters temperature sensor accuracy per the AD7816AR-REEL7 datasheet's error analysis section.
What is the maximum sampling rate achievable with the AD7816AR-REEL7?
The AD7816AR-REEL7 achieves a maximum sampling rate of approximately 111 kSPS when converting the VIN channel, based on its guaranteed 9 μs conversion time. For temperature channel conversions, the 27 μs time limits maximum rate to ~37 kSPS. Actual sustained throughput depends on serial interface speed, MCU overhead, and whether auto power-down is enabled - but the core ADC timing is fixed and independent of external clocking.
How is temperature measured using the AD7816AR-REEL7?
Temperature is measured using the AD7816AR-REEL7 by selecting Channel 0 (the on-chip temperature sensor) via the address register and initiating a conversion. The resulting 10-bit code corresponds to ambient temperature with 0.25°C resolution. At 25°C, the typical output is 0x80 (128 decimal); each LSB change equals 0.25°C. Accuracy is ±2°C from −40°C to +85°C when using the internal 2.5 V reference, as specified in the AD7816AR-REEL7 datasheet Rev. E.
Is the AD7816AR-REEL7 pin-compatible with other devices in the AD7817/AD7818 family?
Yes, the AD7816AR-REEL7 is functionally and pin-compatible with the AD7818ARZ-REEL7 - both are 8-lead SOIC-packaged, single-channel variants sharing identical pin configuration (CONVST, BUSY, OTI, CS, GND, VIN, VDD, DIN/OUT, SCLK, RD/WR), register map, and timing behavior. However, it is not pin-compatible with the 4-channel AD7817 (16-lead SOIC/TSSOP), which uses separate DOUT/DIN pins and different pin numbering.
AD7816AR-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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-SOIC
AD7816AR-REEL7 FAQ
1.How can I place an order for AD7816AR-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7816AR-REEL7 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 AD7816AR-REEL7 reliable?
The price and inventory of AD7816AR-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7816AR-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7816AR-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7816AR-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7816AR-REEL7?
AD7816AR-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7816AR-REEL7 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 AD7816AR-REEL7?
For technical support, including AD7816AR-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7816AR-REEL7 requirements.
6.How does Aetrix verify that AD7816AR-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7816AR-REEL7 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 AD7816AR-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7816AR-REEL7?
All AD7816AR-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7816AR-REEL7, 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 AD7816AR-REEL7 part is unused and in its original packaging.
Return procedure for AD7816AR-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7816AR-REEL7 Tags
-
MCP9700T-E/TT
Microchip Technology
-
MCP9700T-E/LT
Microchip Technology
-
MCP9701T-E/TT
Microchip Technology
-
MCP9701T-E/LT
Microchip Technology
-
TMP235A4DBZR
Texas Instruments
-
MCP9700AT-E/TT
Microchip Technology
-
MCP9700AT-E/LT
Microchip Technology
-
MCP9701AT-E/LT
Microchip Technology
-
MCP9701AT-E/TT
Microchip Technology
,TO-226_straightlead.jpg)
-
LM335Z
STMicroelectronics
-
TMP1075NDRLR
Texas Instruments
-
TMP1075DGKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
