A/D Converters (Analog to Digital converter)

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A/D converter
An analog-to-digital converter (abbreviated ADC, A/D or A to D) is an electronic integrated circuit, which converts continuous signals to discrete digital numbers. The reverse operation is performed by a digital-to-analog converter (DAC). Typically, an ADC is an electronic device that converts an input analog voltage (or current) to a digital number.

Our database consists of following AD converters:

1/2 DIGIT SINGLE CHIP DIGITAL MULTIMETER LSI
This is a 3 1/2 digit single chip digital multimeter LIS with auto-ranging function containing 3 1/2 digit dual-slope A/D converter voltage reference controller oscillator battery-life detector and LCD driver. This is most suitable for the pocket type digital multimeter because of low operating voltage(3V) and functions of auto-ranging display hold LCD display piezo buzzer direct driving and battery life indicator.

Features

• Low Operating Current
• Low Operating Voltage (3V)
• Dual-slope A/D Converter
• Auto-ranging
• Holding Function (Data，Range)
• LCD Display Direct Driving
• Voltage Doubler for LCD Driver On-cihp
• Voltage regulator for LCD Driving
• Piezo Buzzer Direct Driving
• Power-on Initialize
• Battery-life Detector
• C-MOS Technology

3/4 DIGIT SINGLE CHIP DIGITAL MULTIMETER LSI
This is a 3 3/4 digits with 42 segments bargraph single chip digital multimeter LSI.. The AD converter block incorporates two kind of dual-slope AD converter such as high-accuracy and high-speed converter. The high-accuracy AD converter performs accurate 3 3/4 digits digital display and the high-speed AD converter performs high-speed 42 segments bargraph display. The input attenuator part of this can be simplified because of incorporated resistance for resistance. This is suitable for high performance full-auto-ranging digital multimeters because of many functions controlled by internal CPU such as data hold data memory auto power-off and external relay driving which enables input range selection including current measurement mode.

Features

• 3 3/4 digits display (±3999)
• 42 Segments Bargraph Display
• Full Auto-ranging Measurement (20Times／sec)
• Power-on Initialization
• Auto Power-off Function
• Data Hold Function
• Data Memory Function
• Relative Display Function
• Low Operating Current
• Low Operating Voltage (Battery Operation)
• Reference Voltage On-chip (External Reference Voltage also available)
• Capacitor Measurement Function
• Rotary or Push type Input Mode selection
• External Relay Driving
• Piezo Buzzer Direct Driving
• LCD Display
• Serial Data Output (BCD Format)
• C-MOS Technology

2-DIGIT SINGLE CHIP A/D CONVERTER
This is a low operating current, high performance 2-digit single chip A/D converter containing a sample/hold circuit, an oscillator, a 7-segment decoder, LED display driver and a control circuit. The LED display changes by the high-speed sampling rate of 4 times/s (typ). This realizes to apply with few external components, therefore it is most suited for digital meters, digital thermometers and the others.

Features

• 8bit Resolution, Successive Approximation Method
• Low Input Current (1uA typ)
• Dynamic LED direct drive
• Sampling-rate (4 times/s typ)
• Sample/Hold Circuit On-Die
• CR Oscillation Circuit On-Die
• Power-on Initialization
• Offset Adjustment Terminal
• Low operating current
• Applicable with Few External Components
• C-MOS technology