Rainbow Electronics MAX1367 - Manual (Page 21)

Power-Supply Rejection (PSR)—ADC
PSR is a measure of the data converter’s level of immu-
nity to power-supply fluctuations. PSR assumes that the
converter’s linearity is unaffected by changes in the
power-supply voltage. Power-supply rejection ratio
(PSRR) is the ratio of the input signal change to the
change in the converter output. PSRR is typically mea-
sured in dB.
Power-Supply Rejection—V/I Converter
PSR is a measure of the data converter’s level of immu-
nity to power-supply fluctuations. PSR assumes that the
converter’s linearity is unaffected by changes in the
power-supply voltage.
Note: The V/I converter current output (4–20mA)
power-supply rejection is with respect to the 7V to 30V
loop supply.
MAX1365/MAX1367
Stand-Alone, 4.5-/3.5-Digit Panel Meters
with 4–20mA Output
______________________________________________________________________________________ 21
R SET (k Ω) I SEG (mA)
25 21.6
50 10.8
100 5.4
500 1.1
> 2500 LED driver disabled
Table 6. Segment-Current Selection
FET TYPE N-CHANNEL DEPLETION MODE
I DS 30mA
BV DS (V EXT * - REG_VDD) min
V PINCHOFF REG_VDD max
Power dissipation 30mA x (V
EXT
- REG_VDD) min
Table 7. FET Characteristics
*V EXT is the 7V to 30V loop voltage.