Features and Benefits
- 1 mm height profile
- Compact PCB footprint
- Seamless transition between modes
- 38 μA typical quiescent current
- 2.5 MHz operation enables 1.5 μH inductor
- Input voltage: 2.3 V to 5.5 V
- Fixed output voltage: 2.8 V to 5.0 V
- See data sheet for additional features
The ADP2503/ADP2504 are high efficiency, low quiescent current step-up/step-down dc-to-dc converters that can operate at input voltages greater than, less than, or equal to the regulated output voltage. The power switches and synchronous rectifiers are internal to minimize external part count. At high load currents, the ADP2503/ADP2504 use a current-mode, fixed frequency pulse-width modulation (PWM) control scheme for optimal stability and transient response. To ensure the longest battery life in portable applications, the ADP2503/ADP2504 have an optional power save mode that reduces the switching frequency under light load conditions. For wireless and other low noise applications where variable frequency power save mode may cause interference, the logic control input sync forces fixed frequency PWM operation under all load conditions.
The ADP2503/ADP2504 can run from input voltages between 2.3 V and 5.5 V, allowing single lithium or lithium polymer cell, multiple alkaline or NiMH cells, PCMCIA, USB, and other standard power sources. The ADP2503/ADP2504 have fixed output options, or using the adjustable model, the output voltage can be programmed through an external resistor divider. Compensation is internal to minimize the number of external components.
During logic-controlled shutdown, the input is disconnected from the output and draws less than 1 μA from the input source. Operating as boost converters, the ADP2503/ADP2504 feature a true load disconnect function that isolates the load from the power source. Other key features include undervoltage lockout to prevent deep battery discharge, and soft start to prevent input current overshoot at startup.
Data Sheet, Rev. A, 08/09
Markets & Technology
- Vital Signs Measurements
- Electrocardiogram (ECG) Measurement
- Electroencephalogram (EEG) Measurement
- Non-Invasive Blood Pressure (NIBP)
- Respiration Rate Measurement
- Oxygen Saturation (SpO2) Measurement
- Disease Management & Wellness
- Portable Blood Analyzer
- Body Composition, Hydration, Bioimpedance Analysis
- Insulin Pump
- Activity Tracking & Fall Detection
- Wearable Health Monitor
3D Time of Flight (ToF)
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (2)
This product has individual evaluations boards at specific voltages or with specific features as well as the RedyKit&tm;. The RedyKit simplifies product evaluation by providing two assembled and tested evaluation boards, plus a full set of product (voltage) options for an IC regulator. All the IC options come sorted and stored in the kit with the Analog Devices part number clearly printed on each antistatic zip-top bag.
Simple device measurements such as line and load regulation, dropout, and ground current can be demonstrated with just a single voltage supply, a voltmeter, a current meter, and load resistors.
The AD-96TOF1-EBZ is a proven hardware platform for depth perception. When paired with processor board from the 96Boards eco system, it can be used for 3D software and algorithm development. While the software and algorithms are being developed, the hardware design can be leveraged for productization. ADI can suggest 3rd party developers to help customize the platform to meet individual application needs.
Depending on customer preferences and development experience, different 96Boards processor boards can be used for overall system evaluation and custom development. There is also a Raspberry Pi interface available on the Mezzanine board for extra customer flexibility.
This solution offers the ability to be very small and low power while measuring depth at up to 6m distances, good outdoor and indoor performance and VGA resolution.
It can be used for applications like:
- Industrial automation
- SLAM (Simultaneous Localization and Mapping)
- Augmented Reality
- Virtual Reality
- Automotive sensing
Features & Benefits
The ADI ToF system uses a VGA CCD that enables the user to capture a 640x480 depth map of an image, providing up to 4x higher resolution than many other TOF systems on the market. This enables users to detect and measure the distance to smaller and thinner objects that would otherwise be invisible to other ToF systems. More information is included in our ToF technology page.
- Range: <6m
- FoV: 90° x 69.2°
- Wavelength 940nm
- Near: 25cm – 80cm
- Medium: 30cm – 4.5m
- Far: 3m – 6m
- Accuracy < 2% for all ranges
- Frame Rate: 30 fps max (dependent on application processor, OS and interface to host computer)
- Resolution: 640 x 480 pixels
- Multiple interface options to PC (USB, ETH, WiFi)
- ToF specific API for system control & data acquisition
- Operating system for Linux, Windows, Mac
- Complete open source software framework: wrappers for MATLAB®, Python, RobotOS
- Platform allows for software/algorithm development while hardware can be optimized
- 3rd Party network to help modify platform for individual production needs
Tools & Simulations
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.
Power Reference Designs (1)
Technical Articles (2)
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.