Rainbow Electronics MAX1367 - Manual (Page 8)

Stand-Alone, 4.5-/3.5-Digit Panel Meters
with 4–20mA Output
8 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(A
VDD
= D
VDD
= +5V, V
DAC_VDD
= +5.0V, GND = 0, LEDG = 0, V
LEDV
= +2.7V to +5.25V, V
REF+
- V
REF-
= 2.048V (external refer-
ence), V EXT = 7V, C REF+ = C REF- = 0.1µF, C NEGV = 0.1µF. Internal clock mode, unless otherwise noted. T A = +25°C, unless other-
wise noted.)
-0.30
-0.20
-0.25
-0.10
-0.15
-0.05
0
-40 10 -15 35 60 85
DAC GAIN ERROR
vs. TEMPERATURE
MAX1365/67 toc19
TEMPERATURE ( °C)
GAIN ERROR (LSB)
4–20OUT
= 21.7mA
CONV_IN
= 1V
10mA/div
500mV/div
STEP RESPONSE
MAX1365/67 toc20
100 µs/div
-50
-20
-30
-40
0
-10
40
30
20
10
50
-40 -20 0 20 40 60 80
4–20OUT ZERO-SCALE ERROR
vs. TEMPERATURE
MAX1365/67 toc21
TEMPERATURE ( °C)
CURRENT OUTPUT (
µ
A)
EXTERNAL REFERENCE = 2.048V
-50
-20
-30
-40
0
-10
40
30
20
10
50
-40 -20 0 20 40 60 80
4–20OUT GAIN ERROR
vs. TEMPERATURE
MAX1365/67 toc22
TEMPERATURE ( °C)
GAIN ERROR (%)
EXTERNAL REFERENCE = 2.048V
4–20mA MODE
0 TO 16mA MODE
-0.5
0
0.5
1.0
1.5
2.0
2.5
-20,000 -10,000 0 10,000 20,000
4–20OUT vs. DAC CODE
(4–20OUT SPAN LINEARITY)
MAX1365/67 toc24
DAC CODE (COUNTS)
SPAN LINEARITY (
µ
A)
OFFSET ENABLED
(EN_I = HIGH)
-150
-100
-50
0
50
100
150
4 8 6 10 12 14 16 18 20
POWER-SUPPLY REJECTION
vs. CURRENT OUTPUT (4-20OUT)
MAX1365/67 toc23
4-20OUT OUTPUT CURRENT (mA)
POWER-SUPPLY REJECTION (nA/V)