Electrical characteristics (continued) – Rainbow Electronics MAX1367 User Manual
Page 5
MAX1365/MAX1367
Stand-Alone, 4.5-/3.5-Digit Panel Meters
with 4–20mA Output
_______________________________________________________________________________________
5
ELECTRICAL CHARACTERISTICS (continued)
(AV
DD
= DV
DD
= DAC_VDD = +2.7V to +5.25V, GND = 0, V
LEDV
= +2.7V to +5.25V, LEDG = 0, V
REF+
- V
REF-
= 2.048V (external
reference), 4-20OUT = 7V, V
REG_AMP
= +5.0V, C
REF+
= 0.1µF, REF- = GND, C
NEGV
= 0.1µF. Internal clock mode, unless otherwise
noted. All specifications are at T
A
= T
MIN
to T
MAX
. Typical values are at T
A
= +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DAC OUTPUT ACCURACY
Zero-Scale Error
4–20mA or 0 to 16mA mode, T
A
= +25°C
±50
µA
Zero-Scale Error Tempco
±40
p p mFS /
° C
Gain Error
4–20mA or 0 to 16mA mode, T
A
= +25°C
±0.5
%FS
Gain-Error Tempco
±25
p p mFS /
° C
Span Linearity
±2
±4
µA
Power-Supply Rejection
PSR
V
EXT
= 7V to 30V
4
µA/V
Signal Path Noise
10pF to GND on 4-20OUT
2.0
µA
RMS
4–20mA Current Limit
Limited to 12.5 x V
REF
/ 1.28k
Ω
20
mA
Note 1: Integral nonlinearity is the deviation of the analog value at any code from its theoretical value after nulling the gain error and
offset error.
Note 2: Offset calibrated.
Note 3: Offset nulled.
Note 4: Drift error is eliminated by recalibration at the new temperature.
Note 5: The input voltage range for the analog inputs is given with respect to the voltage on the negative input of the differential pair.
Note 6: V
AIN+
or V
AIN-
= -2.2V to +2.2V. V
REF+
or V
REF-
= -2.2V to +2.2V. All input structures are identical. Production tested on
AIN+ and REF+ only. V
REF+
must always be greater than V
REF-
.
Note 7: Power-supply currents are measured with all digital inputs at either GND or DV
DD
.
Note 8: Measured at DC by changing the power-supply voltage from 2.7V to 5.25V and measuring the effect on the conversion error
with external reference. PSRR at 50Hz and 60Hz exceeds 120dB with filter notches at 50Hz and 60Hz (Figure 1).
Note 9: LED drivers are disabled.