Document Number: 001-52469 Rev. *H Page 44 of 50
Document Conventions
Units of Measure
The following table lists the units of measure that are used in this document.
Numeric Conventions
Hexadecimal numbers are represented with all letters in uppercase with an appended lowercase ‘h’ (for example, ‘14h’ or ‘3Ah’).
Hexadecimal numbers may also be represented by a ‘0x’ prefix, the C coding convention. Binary numbers have an appended
lowercase ‘b’ (for example, ‘01010100b’ or ‘01000011b’). Numbers not indicated by an ‘h’, ‘b’, or ‘0x’ are in decimal format.
Table 40. Units of Measure
Symbol Unit of Measure Symbol Unit of Measure
KB 1024 bytes ms millisecond
dB decibel mV millivolt
C degree Celsius mVpp millivolts peak-to-peak
fF femto farad nA nanoampere
Hz hertz ns nanosecond
kHz kilohertz nV nanovolt
k kilohm ohm
MHz megahertz ppm parts per million
µA microampere % percent
µs microsecond pA picoampere
µV microvolt pF picofarad
µW microwatt ps picosecond
mA milliampere V volt
mm millimeter W watt
Glossary
active high 1. A logic signal having its asserted state as the logic 1 state.
2. A logic signal having the logic 1 state as the higher voltage of the two states.
analog blocks The basic programmable opamp circuits. These are SC (switched capacitor) and CT (continuous time) blocks.
These blocks can be interconnected to provide ADCs, DACs, multi-pole filters, gain stages, and much more.
analog-to-digital
converter (ADC)
A device that changes an analog signal to a digital signal of corresponding magnitude. Typically, an ADC converts
a voltage to a digital number. The digital-to-analog converter (DAC) performs the reverse operation.
Application
programming
interface (API)
A series of software routines that comprise an interface between a computer application and lower level services
and functions (for example, user modules and libraries). APIs serve as building blocks for programmers that create
software applications.
asynchronous A signal whose data is acknowledged or acted upon immediately, irrespective of any clock signal.
bandgap
reference
A stable voltage reference design that matches the positive temperature coefficient of VT with the negative
temperature coefficient of VBE, to produce a zero temperature coefficient (ideally) reference.
bandwidth 1. The frequency range of a message or information processing system measured in hertz.
2. The width of the spectral region over which an amplifier (or absorber) has substantial gain (or
loss); it is sometimes represented more specifically as, for example, full width at half maximum.
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