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Templates for part descriptions

FPGA, CPLD, etc

FPGA nLEs nIOs _RAM_ [footprint]

CPLD nLEs nIOs [footprint]

  • nLEs: Number of logic elements. LEs:4608
  • nIOs: Number of IO pins. IOs:142
  • RAM: Amount of RAM in metric kbits. RAM:120kb

These chips can differ significantly from each other, so just use common sense.

A/D converters

ADC.n nbit sps interface _inl_ _dnl_ _refppm_ [footprint]

  • sps: Samples per second. 50kSa/s Alternatively: settling time. 15µs
  • interface: data interface (SPI, I2C, parallel, etc)
  • inl: Integral nonlinearity, LSB. INL:2
  • dnl: Differential nonlinearity, LSB. DNL:3
  • refppm: PPM/K of integrated reference, if present. Ref:2ppm/K

D/A converters

DAC.n nbit sps interface _inl_ _dnl_ _refppm_ [footprint]

  • sps: Samples per second. 50kSa/s Alternatively: settling time. 15µs
  • interface: data interface (SPI, I2C, parallel, etc)
  • inl: Integral nonlinearity, LSB. INL:2
  • dnl: Differential nonlinearity, LSB. DNL:3
  • refppm: PPM/K of integrated reference, if present. Ref:2ppm/K

Linear regulators, LDOs, DC-DC

Reg Lin voltage current [footprint]

Reg LDO voltage current [footprint]

Reg Buck in:vin vout current freq [footprint]

Reg Boost in:vin vout current freq [footprint]

Also RegCtrlr.

  • voltage: output voltage or AdjV
  • current: maximum output current or AdjI

The cutoff for linear vs. LDO is suggested to be a typical dropout of 1.2V at full load. This places the worst IC commonly considered "LDO" (LM1117) just inside the LDO category.

Voltage references

VRef Series/Shunt voltage tolerance ppm/K [footprint]

Logarithmic amplifiers, detectors

LogAmp dynamic_range bandwidth [footprint]

LogDetect dynamic_range bandwidth [footprint]

The distiction is that detectors typically have an integrated low-pass filter, so high RF comes out as a DC power level.

Comparators

Comp.n _delay_ _irange_ _outtech_ _extras_ [footprint]

  • .n: number of units. omit if one.
  • delay: propagation delay, ns.
  • irange: RRI, SSI, OverTopI
  • outtech: OpenDrain, OpenColl, TTL, CMOS, LVDS, etc.
  • extras: ProgHysteresis, etc.

Operational amplifiers, instrumentation amplifiers

OpAmp.n _intype_ GBW _slewrate_ _iorange_ _tech_ _extras_ [footprint]

InAmp.n _intype_ GBW _slewrate_ _iorange_ _tech_ _extras_ [footprint]

  • .n: number of units. omit if one.
  • intype:
    • VFB for voltage feedback, but omit for GBW < 75 MHz
    • CFA for current feedback
  • slewrate:
    • Only specify if notable (suggested cutoff: 6V * GBW)
    • Always specified in V/µs
  • iorange:
    • RRI, RRO, RRI RRO if rail-to-rail (go by manufacturer's claims)
    • SSI, SSO, SSIO if single-supply
    • OverTopI if over-the-top
    • OpenCollO, OpenDrnO if open-collector/open-drain
  • tech: input circuit technology. CMOS, JFET, etc. Omit for BJT or if unspecified.
  • extras:
    • LowVos: low V offset (suggested: < 1mV)
    • VLowVos: very low V offset (suggested: < 50µV)
    • LowIB: low input bias current (suggested: < 1µA)
    • VLowIB: very low input bias current (suggested: < 1 nA)
    • LowNoise: low noise (cutoff depends on applications!)
    • Chopper: chopper-stabilized

Discrete transistors

PMOS.n _semi_ -xV -xA _Rdson_ _Vgsth_ [footprint]

NMOS.n _semi_ xV xA _Rdson_ _Vgsth_ [footprint]

PNP.n _semi_ -xV -xA _Pd_ _ft_ [footprint]

NPN.n _semi_ xV xA _Pd_ _ft_ [footprint]

NJF.n _semi_ xV Idss [footprint]

PJF.n _semi_ xV Idss [footprint]

SCR xV xA _Itsm_ [footprint]

PUT xV xW _Itrm_ [footprint]

UJT xV xW [footprint]

  • semi: specify semiconductor material for exotic devices
  • Use negative voltage, current for P-type devices
  • Rdson: on-resistance of MOSFET. 34mR
  • Vgsth: threshold of MOSFET. Typically at a low current like 250µA. Negative for P-type. -3Vth

Discrete diodes

Diode xV xA [footprint]

Schottky xV xA [footprint]

Zener xV xW Iz:xA [footprint]

TVS xV _pulse_ _Cj_ [footprint]

Varicap xV Cjrange [footprint]

LED color wavelength xV xA [footprint]

  • pulse: 8/20µs peak pulse

Optocouplers

Optocoup NPN+base isoV fwdcurrentA vvvVceo [footprint]

Microcontrollers

MCU nbit/arch ROM:nKB RAM:nKB _extras_ [footprint]

  • arch: for ARM, use such as ARM-M4
  • extras: list features not including the usuals like SPI/I2C/UART.

Passives

IND nH nR _SRF:100MHz_ _(dimensions)_ _[footprint]_

Digital interface converters

Interface FROM TO [footprint]

Digital attenuators

Atten ndB nbit BW _tech_ [footprint]

  • tech: device/semiconductor technology, if appropriate

Analog switch

AnSwitch nPnT _tech_ _extras_ [footprint]

Memories

Mem type size interface _speed_ [footprint]

  • type: EEPROM, Flash, SRAM, DRAM, DDR2-SDRAM, etc
  • size: use B for byte, bit for bit
  • speed: either interface clock or access time

Temperature sensors

Sensor Temp range accuracy interface [footprint]

  • range: only specified range (not absolute max): 0-70C
  • accuracy: ±2C
  • interface: can be Analog

Digital drivers, level shifters, translators

Logic BusTXRX width supplyrange/techs speed features [footprint]

Logic LevelShift width supplyrange/techs speed features [footprint]

Logic TXRX supplyrange/techs speed features [footprint]

Logic TX supplyrange/techs speed features [footprint]

Logic RX supplyrange/techs speed features [footprint]

Logic Isolator supplyrange speed isolation features [footprint]

Oscillators, PLL

Osc freq _tech_ outtype extras [footprint]

PLL freqmax outtype extras [footprint]

OscPLL freqmax outtype extras [footprint]

  • tech: oscillator technology (Crystal, CMEMS, etc)

Power drivers

Driver type nchannels tech powerlevel interface [footprint]

Displays

Display VFD 7seg Digits:8 Muxed

Display LED 7seg Digits:3 Muxed Green

Modulators, Demodulators

ModDemod freq (type) [footprint]