
466
Applying adjustable-series bandgaps
packages and can operate at higher voltages. The Maxim DAC used in this circuit is a
serial input, voltage output type, and can provide full 14-bit performance (±1LSB, INL
and DNL) over the –40°C to +85°C temperature range. (It is part of a DAC family
MAX5141 to MAX5144, with different options.) The MAX5143 is a low-power DAC,
with an operating voltage of 2.7 to 3.6 volts and with a maximum supply current of
less than 200 µA. It also features a 25-MHz, three-wire serial interface. The circuit
shows the DAC’s input is (HF) bypassed by a 0.1-µF ceramic disk capacitor. If low-
frequency bypassing is required, a 1-µF ...