MAX1492, MAX1494 3.5- And 4.5-Digit, Single-Chip ADCs With LCD DriversThe MAX1492 MAX1494 low-power, 3.5- and 4.5-digit,
Analog-to-digital converters (ADCs) with integrated liquid
crystal Display (LCD) drivers operate from a single 2.7V
to 5.25V power supply. They include an internal reference,
a high-accuracy on-chip Oscillator and a triplexed
LCD Driver An internal Charge Pump generates the negative
supply needed to power the integrated input Buffer
for single-supply operation. The ADC is configurable for
either a 2V or 200mV input range and outputs its conversion
results to an LCD and/or to a Microcontroller
(C). C Communication is facilitated through an
SPI-/QSPI-/MICROWIRE-compatible serial Interface
The MAX1492 is a 3.5-digit (1999 count) device,
and the MAX1494 is a 4.5-digit (19,999 count) device.
The MAX1492 MAX1494 do not require external-precision integrating capacitors, autozero capacitors, crystal Oscillators Charge Pumps or other circuitry required with dual-slope ADCs (commonly used in panel meter circuits). These devices also feature on-chip Buffers for the differential signal and reference inputs, allowing direct Interface with high-impedance signal sources. In addition, they use continuous internal-offset calibration and offer >100dB simultaneous rejection of 50Hz and 60Hz line noise. Other features include data hold and peak hold, overrange and underrange detection, and a lowbattery monitor. The MAX1494 comes in a 32-pin, 7mm x 7mm TQFP package, and the MAX1492 comes in 28-pin SSOP and 28-pin PDIP packages. All devices in this family operate over the 0C to +70C commercial temperature range. By Maxim Integrated Products |
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MAX1492 Pb-Free | MAX1492 Cross Reference | MAX1492 Schematic | MAX1492 Distributor |
MAX1492 Application Notes | MAX1492 RoHS | MAX1492 Circuits | MAX1492 footprint |