BGR is 17[Formula: see text]ppm/ C and it is robust against the process variations. Applying an arbitrary 100-mV op-amp offset results in a lower than 1.1[Formula: see text]mV deviation in generated reference voltage. Due to the better matching of MIM capacitors in CMOS process (rather ...
As expected, the DC offset can be larger than what we can usually find in most applications. In this situation, the voltage value must be VOFFSET≤ ± VMID. If the DC offset is greater than this limit, the VREFvoltage value goes outside the voltage supply range of the ADA4505. The eq...
The MAX4208/MAX4209 precision REFIN buffer essentially eliminates the error voltage at REF. The REFIN buffer is a unity-gain op amp that has a guar- anteed VOS of less than 40μV with a CMOS input bias current of only 1pA, to allow setting REFIN with a simple resistive divider with ...
The offset components discussed so far are all expected to be proportional to the bias current (or bias voltage) of the Hall plate. In practice, there are additional mechanisms, mostly linked to the readout chain, that introduce similar offset components which are independent of the Hall plate...
The loop op-amps IB contribute to the spurious DC levels at vo and the main contribution comes from IC2. Thus, the output DC voltage Vo,dc can be constrained with low IB op-amps. On the other hand, the op-amp input offset voltage VOS at IC1 is transferred to vo by the gain ...