powerZONE Products for the week of July 29, 2002
Analog Devices Says . . .
ADM1060: Single-Chip Solution For Multiple Power Supply
Monitoring And Sequencing
New to the hot swap and sequencing family of products from Analog Devices comes the ADM1060, a programmable power supply supervisor/sequencing IC. The ADM1060, designed for central office and other infrastructure systems, eliminates the need for multiple fault detection ICs normally required to protect against damage, miscommunication and latch-up.
The ADM1060 monitors the board's supply fault detection and sequencing/combinatorial
logic with several key features. Seven independent supplies, including one
high-voltage detector (up to +14.4 V), two bipolar voltage detectors (up
to +6 V or down to -6 V), and four positive low- voltage detectors (up to
+6 V) can be programmed to detect under-voltage, over-voltage or out-of-window
conditions. A watchdog detector with programmable timeout delay can be set
so that if a clock doesn't toggle (transition from low to high or from high
to low) within a programmable time period (up to 18 seconds) a fail flag
will assert. The ADM1060 can be programmed to configure logic buffers or
detect positive/negative edges via four general-purpose inputs. These features,
along with nine programmable output drivers, provide power supply monitoring
at +/-2.5%.
analogZONE Says . . .
This is a very complete solution to the increasingly thorny problems in powering and monitoring complex systems with multiple voltage levels and demands on the order of powering the various sections to avoid direct miscommunications or even damage.
The ADM1060 has inputs for one high-voltage supply (up to 14.4 V) -- which becomes the supply for the IC as well -- and 4 positive-only supplies (up to +6 V), plus 2 positive or negative supplies (up to +6 V or -6 V.) Nine programmable output drivers allow for different configurations with open collector (external pull-ups), open collector (internal pull ups), fast internal pull-ups, and internally charge-pumped high drive.
A logic block provides the ability to combine and sequence logic control of all the inputs and outputs, while the timeout delay on the watchdog can be programmed from 200 ms to 12.8 s. Apart from the watchdog input there are also 4 general-purpose inputs which can be configured as logic buffers or to detect edges and generate pulses (positive or negative) from them. The ADM1060 itself uses just 2 mA (typical).
Although this is a very complete product in and of itself I'm sure that customers will ask for a couple of LDOs to be bundled on-chip as well -- certainly for 1.8 V and -5 V. The data sheet is excellent with every part of the IC separated out for explanation, capabilities, warnings and programming.
The ADM1060 is fabricated in BiCMOS and is sampling in TSSOP-28. Production
will be September 2002 with pricing at $5.50 in 1000-piece lots.