Maxim Integrated MAX138CMH
- Part Number:
- MAX138CMH
- Manufacturer:
- Maxim Integrated
- Ventron No:
- 3252479-MAX138CMH
- Description:
- IC ADC 3 1/2DIG W/LCD DVR 44MQFP
- ECAD Model:
-
- Datasheet:
- MAX138CMH
Description
The MAX138/MAX139 are 3½ digit A/D converters (ADCs) with on-board LCD (MAX138) and LED (MAX139) display drivers. They also contain a charge-pump voltage inverter, allowing them to measure both positive and negative input voltages while operating from a single power-supply voltage from 2.5V to 7V. The operating circuits of the MAX138/MAX139 are similar to those of the ICL7136 and ICL7137 respectively, except the MAX138/MAX139 have an internal oscillator and an external charge-pump capacitor connected to pins 38 and 40.
MAX140 is a low segment-current version of the MAX139 intended for use with low-current LED displays.
Features
Single Supply 2.5V to 7.0V Operation
Measures Both Positive and Negative Input Voltages
Charge-Pump Voltage Inverter Generates a Negative Supply Voltage
Internal Bandgap Reference
On-Board Display Driver
Low Segment Current (MAX140)
Applications
5V Powered Panel Meters
3V Powered DMMs
Instruments
Portable Monitors
Weigh Scales
Digital Thermometers
The MAX138/MAX139 are 3½ digit A/D converters (ADCs) with on-board LCD (MAX138) and LED (MAX139) display drivers. They also contain a charge-pump voltage inverter, allowing them to measure both positive and negative input voltages while operating from a single power-supply voltage from 2.5V to 7V. The operating circuits of the MAX138/MAX139 are similar to those of the ICL7136 and ICL7137 respectively, except the MAX138/MAX139 have an internal oscillator and an external charge-pump capacitor connected to pins 38 and 40.
MAX140 is a low segment-current version of the MAX139 intended for use with low-current LED displays.
Features
Single Supply 2.5V to 7.0V Operation
Measures Both Positive and Negative Input Voltages
Charge-Pump Voltage Inverter Generates a Negative Supply Voltage
Internal Bandgap Reference
On-Board Display Driver
Low Segment Current (MAX140)
Applications
5V Powered Panel Meters
3V Powered DMMs
Instruments
Portable Monitors
Weigh Scales
Digital Thermometers
Maxim Integrated MAX138CMH technical specifications, attributes, parameters and parts with similar specifications to Maxim Integrated MAX138CMH .
- MountSurface Mount
- Mounting TypeSurface Mount
- Package / Case44-QFP
- Number of Pins44
- Operating Temperature0°C~70°C
- PackagingTray
- Published2003
- JESD-609 Codee3
- Pbfree Codeyes
- Part StatusActive
- Moisture Sensitivity Level (MSL)3 (168 Hours)
- Number of Terminations44
- ECCN CodeEAR99
- Terminal FinishMatte Tin (Sn)
- SubcategoryAnalog to Digital Converters
- TechnologyCMOS
- Voltage - Supply2.5V~7V
- Terminal PositionQUAD
- Terminal FormGULL WING
- Peak Reflow Temperature (Cel)260
- Number of Functions1
- Supply Voltage5V
- Terminal Pitch0.8mm
- Reflow Temperature-Max (s)30
- Base Part NumberMAX138
- Pin Count44
- Power Supplies5V
- Operating Supply Current200μA
- Number of Bits24
- Converter TypeADC, DUAL-SLOPE
- Number of Analog In Channels1
- Output Bit CodeBINARY
- Linearity Error-Max (EL)0.05%
- Display TypeLCD
- Number of A/D Converters1
- Analog Input Voltage-Max0.2V
- Output FormatPARALLEL, WORD
- Digits or CharactersA/D 3.5 Digits
- Height Seated (Max)2.45mm
- Radiation HardeningNo
- RoHS StatusROHS3 Compliant
- Lead FreeLead Free
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