MAX1221 Datasheet, PDF (4/44 Pages) Maxim Integrated Products – 12-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

12-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
ELECTRICAL CHARACTERISTICS (continued)
(AV_DD = DV_DD = 2.7V to 5.25V, external reference V_REF = 2.5V, f_CLK = 3.6MHz (50% duty cycle), T_A = -40°C to +85°C, unless other-
wise noted. Typical values are at AV_DD = DV_DD = 3V. T_A = +25°C. Outputs are unloaded, unless otherwise noted.)
PARAMETER
REF1 Input Current (Note 9)
REF2 Input Current
DC ACCURACY (Note 10)
Resolution
Integral Nonlinearity
Differential Nonlinearity
Offset Error
Offset-Error Drift
Gain Error
Gain Temperature Coefficient
DAC OUTPUT
Output Voltage Range
DC Output Impedance
Capacitive Load
Resistive Load to AGND
SYMBOL
CONDITIONS
I_REF1
V_REF = 2.5V, f_SAMPLE = 225ksps
Acquisition between conversions
I_REF2
V_REF = 2.5V, f_SAMPLE = 225ksps
Acquisition between conversions
DAC
INL
DNL
V_OS
Guaranteed monotonic
(Note 8)
GE (Note 8)
No load
10kΩ load to either rail
(Note 11)
R_L
AV_DD = 2.7V, V_REF = 2.5V,
gain error < 1%
MIN
TYP
MAX
UNITS
25
80
µA
±0.01
±1
25
80
µA
±0.01
±1
12
Bits
±0.5
±4
LSB
±1.0
LSB
±3
±10
mV
±10
ppm of
FS/°C
±5
±10
LSB
±8
ppm of
FS/°C
0.02
0.1
AV_DD -
0.02
V
AV_DD -
0.1
0.5
Ω
1
nF
2000
Ω
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