ZHCSJO8 May 2019 OPA818
ADVANCE INFORMATION for pre-production products; subject to change without notice.
The OPA818 is intended for operation on supplies from 6 V (+4/–2 V) to 12 V (±6 V). OPA818 supports single-supply, split and balanced bipolar supplies and unbalanced bipolar supplies. When operating at supplies below 8 V, the midsupply will be outside the input common-mode range of the amplifier. Under these supply conditions, the common-mode must be biased appropriately for linear operation. Thus the limit to lower supply voltage operation is the useable input voltage range for the JFET-input stage. Operating from a single supply of 12 V can have numerous advantages. With the negative supply at ground, the DC errors due to the –PSRR term can be minimized. Typically, AC performance improves slightly at 12-V operation with minimal increase in supply current.