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Analog Devices Inc. ADT7518ARQZ-REEL
- Part No.:
- ADT7518ARQZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Thermal Management
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADT7518ARQZ-REEL.pdf
- Description:
- IC SENSOR TEMP QD ADC/DAC 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:16,500
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Product details
Overview
ADT7518ARQZ-REEL from Analog Devices is a highly integrated mixed-signal IC combining a 10-bit temperature-to-digital converter, a 10-bit 4-channel ADC, and four 8-bit buffered voltage-output DACs in a single 16-lead QSOP package. It operates from 2.7 V to 5.5 V, delivers ±0.5°C internal temperature accuracy (0°C to +85°C), supports both SPI and I²C interfaces, and features simultaneous DAC output update via LDAC. It is used in smart battery chargers and telecom system monitoring.
For engineers reviewing the ADT7518ARQZ-REEL datasheet, ADT7518ARQZ-REEL pinout, ADT7518ARQZ-REEL application, or ADT7518ARQZ-REEL equivalent, key selection considerations include its dual-interface compatibility, on-chip 2.25 V reference, rail-to-rail DAC output capability, 0 V to 2.25 V ADC input range, and guaranteed monotonic DAC transfer function across all codes.
Technical Context
The ADT7518ARQZ-REEL integrates three independent data conversion subsystems: a bandgap-based 10-bit temperature sensor with 0.25°C resolution, a 10-bit successive-approximation ADC supporting four single-ended analog inputs (AIN1–AIN4), and four independent string DACs with double-buffered registers and on-chip rail-to-rail output amplifiers. All subsystems share a common serial interface controller.
Its dual-mode serial interface supports 4-wire SPI/QSPI/MICROWIRE/DSP protocols and 2-wire SMBus/I²C with PEC error checking; the ADD pin selects one of three I²C addresses (1001000b, 1001010b, or 1001011b). Power-down mode reduces current to 1 µA, and power-on reset ensures DAC outputs initialize to 0 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Accuracy | ±0.5°C typ (0°C to +85°C) - enables precise thermal management without external calibration |
| DAC Resolution | 8 bits - provides 256 discrete output levels per channel for analog control loop setpoints |
| ADC Resolution | 10 bits - delivers 1,024 quantization steps for accurate sensor signal digitization |
| Supply Range | 2.7 V to 5.5 V - supports direct integration into 3.3 V and 5 V systems without level-shifting |
| Interface Support | SPI & I²C - allows flexible host MCU connectivity in space-constrained embedded designs |
| Reference Options | Internal 2.25 V or external VREF-IN - simplifies BOM by eliminating external reference IC in many applications |
| Power-Down Current | 1 µA - extends battery life in portable instruments during idle periods |
Pinout & Package
ADT7518ARQZ-REEL is housed in a 16-lead QSOP (Quarter-Size Outline Package) with 0.65 mm lead pitch, RoHS-compliant, and rated for –40°C to +120°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT-A, VOUT-B, VOUT-C, VOUT-D | DAC analog outputs | Rail-to-rail buffered voltage outputs (0 V to VREF); each drives ≥4.7 kΩ load directly |
| VREF-IN | DAC reference input | Buffered 1 V to VDD input; enables flexible scaling of DAC full-scale range |
| AIN1–AIN4 | ADC analog inputs | Single-ended channels with 0 V to 2.25 V or 0 V to VDD range; support external temperature sensing (D+/D–) |
| CS, SCL/SCLK, SDA/DIN, DOUT/ADD | Serial interface signals | Configurable for SPI (4-wire) or I²C (2-wire); ADD pin sets I²C address; open-drain pins require pull-ups |
| LDAC/AIN3 | DAC update control / ADC input | Active-low LDAC enables simultaneous DAC register update; configurable as AIN3 when LDAC disabled |
| INT/INT | Interrupt output | Open-drain over-limit alert (temperature/VDD/AIN thresholds); polarity programmable |
| GND, VDD | Power supply | Single-supply operation; analog/digital ground shared; decoupling required at VDD pin |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous DAC update | LDAC pin or software command forces synchronized output change across all four DACs - critical for coordinated actuator control |
| Guaranteed monotonic DAC | Monotonicity ensured over full 0–255 code range - eliminates step reversals in closed-loop feedback paths |
| Internal temperature sensor | 10-bit resolution (0.25°C step) with ±0.5°C accuracy (0°C to +85°C) - enables self-monitoring without external components |
| Double-buffered DAC registers | Input registers accept new data while DAC registers hold previous values - prevents glitches during streaming updates |
| SMBus packet error checking | PEC support on I²C interface - improves reliability in noisy industrial bus environments |
Applications
| Smart Battery Charger | Telecom System Monitor |
|---|---|
Use Scenario: Real-time regulation of charging voltage/current based on cell temperature and voltage feedback. IC Role / Device Role / Timing Role: ADT7518ARQZ-REEL measures battery temperature (internal sensor), monitors cell voltage (AIN1–AIN4), and generates precise analog control voltages (VOUT-A–D) for charge controller ICs. Use Value: Enables adaptive charging profiles that extend battery lifespan and prevent thermal runaway, using only one IC for sensing and control. | Use Scenario: Continuous monitoring of board temperature, supply rails (VDD), and analog sensor signals in base station power modules. IC Role / Device Role / Timing Role: ADT7518ARQZ-REEL performs round-robin measurements across VDD, internal temperature, external transistor sensor (D+/D–), and auxiliary analog inputs every ~4.99 ms (averaging off). Use Value: Provides deterministic, low-overhead health monitoring with interrupt-driven alerts (INT pin) for rapid fault response without MCU polling overhead. |
| PC Thermal Management | Domestic Appliance Control |
Use Scenario: Fan speed control and CPU throttling based on die temperature and VRM voltage readings. IC Role / Device Role / Timing Role: ADT7518ARQZ-REEL reads internal temperature and VDD, then drives fan PWM generator (via VOUT-A) and voltage reference (VOUT-B) using I²C host communication. Use Value: Reduces component count vs. discrete sensor+DAC solutions; SPI/I²C flexibility eases integration into legacy and modern motherboard designs. | Use Scenario: Temperature-regulated cooking cycles in smart ovens, using thermistor feedback and heater drive control. IC Role / Device Role / Timing Role: ADT7518ARQZ-REEL digitizes oven cavity temperature (AIN1), senses ambient temperature (internal sensor), and outputs analog setpoint voltages (VOUT-C/D) to triac driver circuits. Use Value: Achieves ±0.5°C thermal stability over full operating range with no external calibration, improving cooking repeatability and safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar mixed-signal monitoring and control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADT7519ARQZ-REEL | Removes ADT7518ARQZ-REEL's limitation where internal temperature accuracy degrades when internal DAC reference is enabled; offers identical pinout and interface | Preferred for new designs requiring simultaneous high-accuracy temperature sensing and DAC operation | Select ADT7519ARQZ-REEL when internal 2.25 V reference must be used for DACs without sacrificing temperature accuracy |
| MAX1272EEE+ | 8-channel 12-bit ADC with internal reference and SPI interface only; no DAC or temperature sensor | Suitable for higher-resolution analog acquisition where DAC or thermal sensing is handled separately | Choose MAX1272EEE+ when ADC resolution >10 bits is required and DAC/temperature functions are implemented externally |
Compared with ADT7518ARQZ-REEL, ADT7519ARQZ-REEL removes a critical functional constraint-enabling concurrent use of the internal reference and high-accuracy temperature measurement-while maintaining full compatibility; MAX1272EEE+ trades integration for higher ADC resolution but requires additional components to replicate ADT7518ARQZ-REEL's mixed-signal functionality.
Availability
ADT7518ARQZ-REEL is available at Aetrix Electronics and suitable for smart battery chargers, telecom system monitors, and domestic appliance control requiring stable component supply and long-term production continuity.
Supply support for ADT7518ARQZ-REEL 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 ADT7518ARQZ-REEL belongs to Analog Devices' precision temperature and data acquisition product line, designed specifically for embedded systems requiring compact, multi-function analog front-ends with minimal external components.
FAQ
What is the operating temperature range of the ADT7518ARQZ-REEL?
The ADT7518ARQZ-REEL is specified for continuous operation from –40°C to +120°C. Its internal temperature sensor achieves ±0.5°C typical accuracy within 0°C to +85°C, and ±2°C to ±5°C across the full range depending on supply voltage and configuration. This makes ADT7518ARQZ-REEL suitable for harsh-environment applications including industrial motor controls and automotive under-hood modules.
Does the ADT7518ARQZ-REEL support both SPI and I²C interfaces simultaneously?
No, the ADT7518ARQZ-REEL supports SPI and I²C modes independently - not concurrently. Interface selection is determined by how the CS pin is driven: CS held high enables I²C mode (using SDA/SCL), while CS pulsed low activates SPI mode (using DIN/DOUT/SCLK). The same physical pins serve dual roles, so system design must commit to one protocol per implementation. ADT7518ARQZ-REEL does not arbitrate between buses or switch dynamically.
What is the purpose of the LDAC pin on the ADT7518ARQZ-REEL?
The LDAC/AIN3 pin on the ADT7518ARQZ-REEL serves as an active-low hardware latch enabling simultaneous update of all four DAC outputs. When pulsed low, it transfers data from input registers to DAC registers, ensuring glitch-free, synchronized analog output changes - essential for multi-axis control systems. If disabled via Control Configuration 3 register, the pin reverts to AIN3 analog input. ADT7518ARQZ-REEL also supports software-triggered LDAC via command register write.
Can the ADT7518ARQZ-REEL measure external temperature using a transistor sensor?
Yes, the ADT7518ARQZ-REEL supports external temperature measurement using a standard NPN or PNP bipolar transistor (e.g., 2N3906) connected to D+/AIN1 and D–/AIN2 pins. It applies a proportional current source and measures the VBE delta to compute temperature. External accuracy is ±3°C (0°C to +85°C) at 3.3 V supply. This capability extends ADT7518ARQZ-REEL beyond on-die sensing to remote hot-spot monitoring in power supplies or PCBs.
What is the DAC output settling time specification for the ADT7518ARQZ-REEL?
The ADT7518ARQZ-REEL specifies a typical DAC output settling time of 6 µs to 8 µs (1/4-scale to 3/4-scale step, VREF = VDD = 5 V). This fast settling enables high-speed closed-loop control - for example, updating heater drive voltage every ~100 µs in real-time thermal regulation. Settling time remains consistent across all four DAC channels and is guaranteed independent of code transition magnitude due to its string DAC architecture.
ADT7518ARQZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- Temp Monitoring System (Sensor)
- Sensor Type:
- Internal and External
- Sensing Temperature:
- -40°C ~ 120°C, External Sensor
- Accuracy:
- -
- Topology:
- ADC, Comparator, Multiplexer, Register Bank
- Output Type:
- I2C, MICROWIRE, QSPI, SPI
- Output Alarm:
- No
- Output Fan:
- No
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 120°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
ADT7518ARQZ-REEL FAQ
1.How can I place an order for ADT7518ARQZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADT7518ARQZ-REEL 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 ADT7518ARQZ-REEL reliable?
The price and inventory of ADT7518ARQZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADT7518ARQZ-REEL is usually 5 days.
3.What payment methods are accepted for ADT7518ARQZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADT7518ARQZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADT7518ARQZ-REEL?
ADT7518ARQZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADT7518ARQZ-REEL 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 ADT7518ARQZ-REEL?
For technical support, including ADT7518ARQZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADT7518ARQZ-REEL requirements.
6.How does Aetrix verify that ADT7518ARQZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADT7518ARQZ-REEL 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 ADT7518ARQZ-REEL meets industry standards.
7.What is the process for return or replacement of ADT7518ARQZ-REEL?
All ADT7518ARQZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADT7518ARQZ-REEL, 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 ADT7518ARQZ-REEL part is unused and in its original packaging.
Return procedure for ADT7518ARQZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADT7518ARQZ-REEL Tags
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EMC2101-ACZL-TR
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MCP9844T-BE/MNY
Microchip Technology
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EMC2101-R-ACZL-TR
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AMC6821SDBQR
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MAX6604AATA+T
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