ICL7116:3 1/2 Digit ADCs with Display Hold

The Maxim ICL7116 and ICL7117 are 3½ digit monolithic analog-to-digital converters. They differ from the Maxim ICL7106 and ICL7107 in that the ICL7116 and ICL7117 have a Hold pin, which makes it possible to hold or “freeze” a reading. These integrating ADCs have very high input impedances and directly drive LCD (ICL7116) and LED (ICL7117) displays. Versatility and accuracy are inherent features of these converters. The dual-slope conversion technique automatically rejects interference signals common in industrial environments. The true differential input is particularly useful when making ratiometric measurements (ohms or bridge transducers). Maxim has added a zero-integrator phase to the ICL7116 and ICL7117, eliminating overrange hangover and hysteresis effects. Finally, these devices offer high accuracy by lowering rollover error to less than one count and zero reading drift to less than 1µV/°C.

Key Features
  • Improved 2nd Source!
  • Hold Pin Allows Indefinite Display Hold
  • Guaranteed First Reading Recovery from Overrange
  • On-Board Display Drive Capability—No External Circuitry Required: LCD (ICL7116), LED (ICL7117)
  • High-Impedance CMOS Differential Inputs
  • Low Noise (< 15µVP-P) Without Hysteresis or Overrange Hangover
  • Clock and Reference On-Chip
  • Zero Input Gives Zero Reading
  • True Polarity Indication for Precision Null Applications
ICL7116, ICL7117: Typical Operating Circuit
ICL7116, ICL7117: Typical Operating Circuit
Applications/Uses
  • Conductance
  • Current
  • Material Thickness
  • Pressure
  • Resistance
  • Speed
  • Temperature
  • Voltage
DataSheet
titleDownload file
ICL7116-ICL7117 Data SheetICL7116-ICL7117.pdf
Parametrics
Part NumberResolution
(±Counts)
Data BusDiff/S.E. InputInternal VREF
(V)
External VREF
(V)
External VREF
(V)
Bipolar VIN
(±V)
Package/PinsBudgetary
Price
nominalminmaxmaxSee Notes
ICL711620007-SegmentDiff. Only2.8-93.5CDIP(W)/40
PDIP(W)/40
PLCC/44
$6.09 @1k
ICL7117-55CDIP(W)/40
MQFP/44
PDIP(W)/40
PLCC/44
$7.92 @500
Related Products
  • MAX136:Low Power, 31⁄2 Digit A/D Converter with Display Hold
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
ICL7116C/DActiveDICE SALES,;NA pin;DICE S;0°C to +70°CSee data sheet
ICL7116CJLNo Longer AvailableCDIP(W),;40 pin;851.8 mm²0°C to +70°CNo
ICL7116CPLNo Longer AvailableICL7116CPL+PDIP(W),;40 pin;835.7 mm²0°C to +70°CNo
ICL7116CPL+ActivePDIP(W),;40 pin;835.7 mm²0°C to +70°CLead Free
ICL7116CPL+3No Longer AvailablePDIP(W),;40 pin;835.7 mm²0°C to +70°CLead Free
ICL7116CPL-3No Longer AvailablePDIP(W),;40 pin;835.7 mm²0°C to +70°CNo
ICL7116CQH+DActivePLCC,;44 pin;311.5 mm²0°C to +70°CLead Free
ICL7116CQH+TDActivePLCC,;44 pin;311.5 mm²0°C to +70°CLead Free
ICL7116CQH-DNo Longer AvailableICL7116CQH+DPLCC,;44 pin;311.5 mm²0°C to +70°CNo
ICL7116CQH-TDNo Longer AvailableICL7116CQH+TDPLCC;44 pin0°C to +70°CSee data sheet
ICL7116-ICL7117.pdf ICL7117
Delta-Sigma ADCs Replace Integrating ADCs for Panel Meters MAX1499
Understanding Integrating ADCs ICL7137
ICL7116-ICL7117.pdf ICL7117