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Analog Devices Inc. AD7999ARJZ-1RL
- Part No.:
- AD7999ARJZ-1RL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-8
- Datasheet:
-
AD7999ARJZ-1RL.pdf
- Description:
- IC ADC 8BIT SAR SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,943
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Product details
Overview
AD7999ARJZ-1RL from Analog Devices is an 8-bit, 4-channel successive approximation ADC with I²C-compatible serial interface in an 8-lead SOT-23 package. It operates from 2.7 V to 5.5 V, delivers 1 µs conversion time, supports −40°C to +125°C automotive temperature range, and uses internal or external reference via VIN3/VREF pin for analog input ranges up to 0 V to VDD. It is used in battery-powered system monitoring where low power and compact size are critical.
For engineers reviewing the AD7999ARJZ-1RL datasheet, AD7999ARJZ-1RL pinout, AD7999ARJZ-1RL application, or AD7999ARJZ-1RL equivalent, key selection factors include its 8-bit resolution, I²C address (0x51), shutdown current ≤1 µA, 4 single-ended input channels, and qualification for automotive environments per AEC-Q100.
Technical Context
The AD7999ARJZ-1RL implements a SAR architecture with integrated track-and-hold amplifier supporting up to 14 MHz full-power bandwidth. Its 2-wire I²C interface operates in standard (100 kHz), fast (400 kHz), and high-speed (up to 3.4 MHz) modes with clock stretching enabled above 1.7 MHz.
It features automatic shutdown between conversions, sequencer-controlled channel scanning, and configurable reference sourcing-either internally from VDD or externally applied to VIN3/VREF. The device uses straight binary coding and supports both internal and external reference configurations without hardware modification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8 bits - defines quantization step size of 1/256 × VREF, enabling basic sensor digitization in cost-sensitive applications. |
| Conversion Time | 1 µs typical - enables sampling rates up to ~95 kSPS at 3.4 MHz I²C clock with clock stretching. |
| Supply Voltage Range | 2.7 V to 5.5 V - allows direct interfacing with common microcontroller I/O rails and battery systems (e.g., 3.3 V or 5 V). |
| I²C Address | 0x51 (7-bit) - fixed address for AD7999-1 variant; avoids bus conflicts when multiple devices share same I²C lines. |
| Shutdown Current | 1 µA maximum at VDD = 3.3 V - reduces quiescent power in sleep-mode battery systems by >99% vs. active operation. |
| Input Channels | 4 single-ended analog inputs (VIN0–VIN3) - supports simultaneous monitoring of voltage, temperature, current, and supply rails. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial control applications requiring extended thermal reliability. |
Pinout & Package
AD7999ARJZ-1RL is housed in an 8-lead SOT-23 package (JEDEC MO-178AA), measuring 2.9 mm × 1.6 mm × 1.1 mm, with gull-wing leads and exposed pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SCL) | Digital Input | Serial clock line; requires external pull-up resistor; supports I²C timing up to 3.4 MHz in high-speed mode. |
| 2 (SDA) | Digital I/O (Open-Drain) | Bidirectional data line; open-drain output mandates external pull-up; handles command writes and conversion result reads. |
| 3 (VIN0) | Analog Input | First single-ended channel; input range 0 V to VREF; 34 pF acquisition-phase capacitance affects anti-aliasing filter design. |
| 4 (VIN1) | Analog Input | Second single-ended channel; identical electrical characteristics to VIN0; supports multiplexed sampling with <1 µs settling. |
| 5 (VIN2) | Analog Input | Third single-ended channel; shares same INL/DNL specs as VIN0–VIN1; usable with internal or external reference. |
| 6 (VIN3/VREF) | Configurable Terminal | Fourth analog input OR external reference input; when used as VREF, sets full-scale range for all channels (0 V to VREF). |
| 7 (GND) | Analog Ground | Primary AGND reference for all analog circuitry; must be star-connected to minimize noise coupling into ADC inputs. |
| 8 (VDD) | Power Supply | Single 2.7–5.5 V rail powering digital core and analog front-end; decoupling capacitor required within 1 cm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| 4-channel single-ended input architecture | Enables compact multi-sensor monitoring without external MUX; eliminates board space and signal path complexity. |
| I²C interface with three speed modes | Supports legacy (100 kHz), mainstream (400 kHz), and high-throughput (3.4 MHz) buses-no protocol translation needed. |
| Automatic shutdown between conversions | Reduces average current to sub-µA levels in low-duty-cycle monitoring, extending battery life in portable instruments. |
| VIN3/VREF dual-function terminal | Allows flexible reference sourcing: internal (VDD-derived) for simplicity or external (precision) for accuracy-critical measurements. |
| Automotive-grade temperature range | Validated operation from −40°C to +125°C ensures reliability in engine control units, battery management, and ADAS subsystems. |
Applications
| System Monitoring | Battery-Powered Instruments |
|---|---|
|
Use Scenario: Real-time voltage, temperature, and current sensing in automotive ECUs and industrial PLCs. IC Role / Device Role / Timing Role: 4-channel analog front-end digitizing sensor outputs; initiates conversions on I²C read commands with 1 µs latency. Use Value: Eliminates need for discrete op-amps and external reference ICs; integrates reference selection and sequencing logic in one 8-pin package. |
Use Scenario: Portable medical devices (e.g., glucose meters, pulse oximeters) requiring long battery life and small PCB area. IC Role / Device Role / Timing Role: Low-power ADC acquiring biometric signals; enters 1 µA shutdown automatically after each conversion. Use Value: Achieves >1-year battery life on coin cells by minimizing active time and eliminating external power management circuitry. |
| Data Acquisition Modules | Medical Instrumentation |
|
Use Scenario: Compact DAQ modules for field-deployable environmental sensors (temperature, humidity, pressure). IC Role / Device Role / Timing Role: Primary ADC interfacing with microcontroller over I²C; supports programmable channel sequencing and auto-restart. Use Value: Reduces BOM count by integrating MUX, T/H, reference switch, and serial interface-enabling sub-10 mm² footprint solutions. |
Use Scenario: Patient monitoring equipment requiring reliable, low-noise digitization of ECG, EEG, and respiration signals. IC Role / Device Role / Timing Role: Front-end ADC capturing analog biosignals; uses internal VDD reference for ratiometric measurement stability. Use Value: Delivers 49.5 dB SINAD and −90 dB channel-to-channel isolation-sufficient for diagnostic-grade waveform fidelity at 8-bit resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7995ARJZ-1RL | 10-bit resolution, higher SINAD (61 dB), same 4-channel SOT-23 package and I²C address (0x51). | Used where improved dynamic range is needed for mid-range sensor signals (e.g., thermistors, strain gauges). | Select AD7995ARJZ-1RL when 10-bit precision is required and system firmware can accommodate larger result registers. |
| AD7991ARJZ-1RL | 12-bit resolution, 69.5 dB SINAD, same pinout and I²C interface but different I²C address (0x50 for -0 version, 0x51 for -1 version). | Suitable for high-accuracy applications like precision power supply monitoring and calibration equipment. | Verify I²C address compatibility; AD7991ARJZ-1RL shares 0x51 address with AD7999ARJZ-1RL, requiring bus arbitration if co-deployed. |
Compared with AD7995ARJZ-1RL and AD7991ARJZ-1RL, the AD7999ARJZ-1RL trades resolution and SNR for lower cost and reduced processing overhead-ideal for threshold-detection and status-monitoring tasks where 8-bit granularity suffices.
Availability
AD7999ARJZ-1RL is available at Aetrix Electronics and suitable for system monitoring, battery-powered instrumentation, and medical device applications requiring stable component supply across automotive and industrial lifecycles.
Supply support for AD7999ARJZ-1RL 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 AD799x family was designed specifically for space-constrained, low-power embedded systems needing simple I²C-based analog sensing-targeting automotive, industrial, and portable medical markets.
FAQ
What is the I²C address of the AD7999ARJZ-1RL?
The AD7999ARJZ-1RL uses a fixed 7-bit I²C address of 0x51. This matches the AD7995-1 and AD7991-1 variants, so bus arbitration is required if multiple -1 versions are placed on the same I²C segment. The address is hardwired and not configurable via pins or registers.
Does the AD7999ARJZ-1RL require an external reference voltage?
No-the AD7999ARJZ-1RL can operate with VDD as the reference source, setting the analog input range to 0 V to VDD. Alternatively, an external reference may be applied to the VIN3/VREF pin. When using VDD as reference, no external components are needed, simplifying design for cost-sensitive applications.
What is the maximum sampling rate achievable with the AD7999ARJZ-1RL?
The AD7999ARJZ-1RL achieves up to ~95 kSPS when operating at 3.4 MHz I²C clock with clock stretching enabled. At 400 kHz I²C, throughput drops to ~7.2 kSPS due to longer transaction overhead. Actual sustained rate depends on host controller's I²C master capability and bus capacitance.
How does the AD7999ARJZ-1RL handle power management in battery applications?
The AD7999ARJZ-1RL automatically enters shutdown mode between conversions, drawing ≤1 µA at 3.3 V. It powers up only during I²C read operations, making it ideal for duty-cycled sensing. No software command is needed to enter or exit shutdown-this behavior is built into the conversion protocol.
Is the AD7999ARJZ-1RL qualified for automotive use?
Yes-the AD7999ARJZ-1RL is qualified for automotive applications with guaranteed operation from −40°C to +125°C and compliance with AEC-Q100 stress testing requirements. Its SOT-23 package and robust I²C interface make it suitable for engine control, battery monitoring, and body electronics subsystems.
AD7999ARJZ-1RL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 140k
- Number of Inputs:
- 3, 4
- Input Type:
- Single Ended
- Data Interface:
- I2C
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- SOT-23-8
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7999ARJZ-1RL FAQ
1.How can I place an order for AD7999ARJZ-1RL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7999ARJZ-1RL 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 AD7999ARJZ-1RL reliable?
The price and inventory of AD7999ARJZ-1RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7999ARJZ-1RL is usually 5 days.
3.What payment methods are accepted for AD7999ARJZ-1RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7999ARJZ-1RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7999ARJZ-1RL?
AD7999ARJZ-1RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7999ARJZ-1RL 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 AD7999ARJZ-1RL?
For technical support, including AD7999ARJZ-1RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7999ARJZ-1RL requirements.
6.How does Aetrix verify that AD7999ARJZ-1RL is sourced from the original manufacturer or authorized distributors?
All AD7999ARJZ-1RL 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 AD7999ARJZ-1RL meets industry standards.
7.What is the process for return or replacement of AD7999ARJZ-1RL?
All AD7999ARJZ-1RL units undergo pre-shipment inspection (PSI). If there is an issue with AD7999ARJZ-1RL, 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 AD7999ARJZ-1RL part is unused and in its original packaging.
Return procedure for AD7999ARJZ-1RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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