Rainbow Electronics MAX1329 - Manual (Page 4)

MAX1329/MAX1330
12-/16-Bit DASs with ADC, DACs, DPIOs, APIOs,
Reference, Voltage Monitors, and Temp Sensor
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ELECTRICAL CHARACTERISTICS (continued)
(DV DD = 1.8V to 3.6V, AV DD = 2.7V to 5.5V, V REFDAC = V REFADC = 2.5V, external reference; 10µF capacitor at REFADC and REFDAC;
0.01µF capacitor at REFADJ; T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Power-Down Output Leakage
Current
±100 nA
Supply Current per DAC No load (Note 3) 70 µA
INTERNAL REFERENCE (10µF capacitor at REFADC and REFDAC, 0.01µF capacitor at REFADJ)
T A = + 25° C , ARE F< 1:0> = D RE F< 1:0> = 01 1.225 1.250 1.275
T A = + 25° C , ARE F< 1:0> = D RE F< 1:0> = 10 2.007 2.048 2.089
Output Voltage at REFADC and
REFDAC
T
A
= + 25° C , ARE F< 1:0> = D RE F< 1:0> = 11 2.450 2.500 2.550
V
Output-Voltage Temperature (Note 2) ±10 ±75 ppm/°C
Source 40 REFADC and REFDAC
Output Short-Circuit Current
Sink 13
mA
REFADC and REFDAC
Line Regulation
±100 ±600 µV/V
I SOURCE = 0µA to 500µA, T A = +25°C 10
Load Regulation
I
SINK
= 0µA to 80µA, T
A
= +25°C 10
µV/µA
Long-Term Stability T A = +25°C ±100
ppm/
1000hrs
Turn-On Time At REFADJ 2 ms
Turn-Off Time 100 ns
Internal reference 445
REFADC buffer 270 Refer ence S up p l y C ur r ent ( N ote 3)
REFDAC buffer 270
µA
EXTERNAL REFERENCE AT REFADJ
AREF<1:0> = DREF<1:0> = 11 1.225V
AV DD
- 0.1V
AREF<1:0> = DREF<1:0> = 10
1.496V to
AV DD - 0.1V
External Reference Input Voltage
Range
AREF<1:0> = DREF<1:0> = 01
2.450V to
AV DD - 0.1V
V
Input Resistance 50 75 k Ω
AREF<1:0> = 01 1
AREF<1:0> = 10 0.8192 REFADC Buffer Gain
AREF<1:0> = 11 0.5
V/V
DREF<1:0> = 01 1
DREF<1:0> = 10 0.8192 REFDAC Buffer Gain
DREF<1:0> = 11 0.5
V/V
Minimum Capacitive Bypass REFADJ to AGND 10 nF