ICL7106 and ICL7107
The ICL7106 and ICL7107 are high performance, low power 3 1/2 digit A/D converters. The ICL7106 is designed to interface with LCDs (liquid crystal displays), includes a multiplexed backplane drive. The ICL7107 can directly drive an instrument size LED display.
Both ICs include seven segment decoders, display drivers, a reference and a clock in a combination of high accuracy, versatility, and true economy. The single power supply operation of the ICL7106 enables building high performance portable multimeters with the addition of only a few passive components and a display.
A great deal of versatility has been designed into these devices. Differential inputs for signal and reference permits applications where the input and reference are not referred to ground. The ICs also feature wide operating ranges for power supply voltage and conversion time, auto-zero to less than 10uV, zero drift of less than 1uV/°C, a maximum input bias current of 10pA, and a rollover error of less than one count.
Since their introduction, the single-chip 3 1/2 digit A/D converters have been widely accepted and used in a variety of digital instrumentation applications. The ICL7106 is used in a large number of digital multimeters like the DT830B, M839B, DT890B+, M890B+, DT890G, M890G and countless more.
| Part number | Temperature range | Package |
|---|---|---|
| ICL7106CPL | 0°C to +70°C | 40 Lead Plastic DIP |
| ICL7106RCPL | 0°C to +70°C | 40 Lead Plastic DIP ("R" indicates device with reversed leads) |
| ICL7106CM44 | 0°C to +70°C | 44 Lead Metric Plastic Quad Flatpack |
| ICL7107CPL | 0°C to +70°C | 40 Lead Plastic DIP |
| ICL7107RCPL | 0°C to +70°C | 40 Lead Plastic DIP ("R" indicates device with reversed leads) |
| ICL7107CM44 | 0°C to +70°C | 44 Lead Metric Plastic Quad Flatpack |
Pinouts
Absolute Maximum Ratings
| Supply Voltage ICL7106, V+ to V- | 15V |
| Supply Voltage ICL7107, V+ to GND | 6V |
| Supply Voltage ICL7107, V- to GND | -9V |
| Analog Input Voltage (Either Input) | V+ to VReference |
| Input Voltage (Either Input) | V+ to VClock |
| Input ICL7106 | TEST to V+ |
| Input ICL7107 | GND to V+ |
For detailed technical specifications, see the Intersil ICL7106 and ICL7107 datasheet (PDF).
To see the ICL7106 "in action" take a look at the following schematic diagrams of digital multimeters using this IC: M830B (DT830B), M266C, M266F, M300, M3900, M832, M890C+ (DT-890B+), M890D (DT-890D), M890F (DT-890F), M890G (DT-890G), M93, M93A, M9502, MY-61, MY-62, MY-64. Some of the schematics are hand-drawn or poor quality, but they are indispensable when repairing a broken multimeter.
