The datasheet for the LM334 suggests the use of a diode for temperature compensation of the LM334:
"The recommended diode for use in this circuit is the 1N457 because its tempco is centered at 11 times the tempco of the LM134, allowing R2 = 10 R1."
The catch is that the TC of diodes is often NOT found on the datasheet (and the 1N457 is no exception to this), and more the 1N457 is hard to find these days.
Please could you suggest a readily obtainable diode appropriate for this job (i.e. with the right characteristcs), and ideally in a surface mount package.
Thanks
Dave