Features and Benefits
- Ultralow power consumption with ICC = 92 nA (typical)
- Precision, low voltage monitoring
- Pretrimmed voltage monitoring threshold options
- 20 options from 0.5 V to 1.9 V
- ±1.3% threshold accuracy over full temperature range
- Output disable input
- 23 µs to 26 µs typical propagation delay
- Open-drain type output
- Power supply glitch immunity
- Available in a 1.46 mm × 0.96 mm WLCSP
- Operational temperature range: −40°C to +85°C
The ADM8641 and ADM8642 are simple voltage detectors suitable for use in general-purpose applications. The ultralow power consumption of these devices makes them suitable for power efficiency sensitive systems, such as battery-powered portable devices and energy meters.
The factory preset detection thresholds from 0.5 V to 4.63 V with ±1.2% accuracy over the full temperature range enable the devices to monitor the node of interest accurately with direct contact. The DIS input lets the user hold the output low regardless of the state of the input. Not all device options are released for sale as standard models. See the Ordering Guide section for full information.
The ADM8641 monitors the voltage using the VCC pin. The separate supply pin on the ADM8642 allows it to have a lower detection threshold down to 0.5 V.
The ADM8641 and ADM8642 are available in a 6-ball, 1.46 mm × 0.96 mm WLCSP. These devices are specified over the −40°C to +85°C temperature range.
- Portable/battery-operated equipment
- Microprocessor systems
- Energy metering
- Energy harvesting
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 (1)
The ADM8641-EVALZ/ADM8642-EVALZ evaluate the ADM8641/ADM8642 ultralow power voltage detectors that have pretrimmed voltage monitoring thresholds of 2.63 V and 1 V, respectively. These thresholds are accurate up to ±1.3% and ±1.6% for the ADM8641-EVALZ and ADM8642-EVALZ, respectively.
The ADM8641-EVALZ VCC pin can be used to monitor the level of an external voltage. The user can place an external jumper on the ADM8642-EVALZ VCC_SEL pin to achieve this monitoring on the ADM8642-EVALZ VCC pin. The user can also use a separate supply for the ADM8642-EVALZ INPUT pin to achieve low voltage monitoring.
The ADM8641-EVALZ/ADM8642-EVALZ have an OUT pin that can be held low regardless of the status of the monitored external voltage by pressing the built in tact switch, which shorts the ADM8641/ADM8642 DIS pin to ground. A built in light emitting diode (LED) is placed at the ADM8641-EVALZ/ADM8642-EVALZ OUT pin to monitor the pin status depending on the level of the monitored external voltage.
For full details on the ADM8641/ADM8642, see the ADM8641/ADM8642 data sheet, which must be consulted in conjunction with this user guide when using the ADM8641-EVALZ/ADM8642-EVALZ.
Features & Benefits
- On-board ADM8641 voltage detector with 2.63 V internal threshold and a ±1.3% accuracy on the ADM8641-EVALZ
- On-board ADM8642 voltage detector with 1 V internal threshold and a ±1.6% accuracy on the ADM8642-EVALZ
- Separate voltage supply pin (VCC) and input pin (INPUT) for low voltage monitoring using the ADM8642-EVALZ
- Built in tact switch for input condition override
- Built in LED for output monitoring
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.