MAX1220 Datasheet, PDF (4/47 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 3.6V (MAX1257), external reference V_REF = 2.5V (MAX1257), AV_DD = 4.75V to 5.25V, DV_DD = 2.7V to AV_DD
(MAX1220/MAX1258), external reference V_REF = 4.096V (MAX1220/MAX1258), f_CLK = 3.6MHz (50% duty cycle), T_A = -40°C to +85°C,
unless otherwise noted. Typical values are at AV_DD = DV_DD = 3V (MAX1257), AV_DD = DV_DD = 5V (MAX1220/MAX1258), 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
Wake-Up Time (Note 12)
1kΩ Output Termination
100kΩ Output Termination
SYMBOL
CONDITIONS
MIN
V_REF = 2.5V (MAX1257), f_SAMPLE = 225ksps
I_REF1
V_REF = 4.096V (MAX1220/MAX1258),
f_SAMPLE = 225ksps
Acquisition between conversions
V_REF = 2.5V (MAX1257), f_SAMPLE = 225ksps
I_REF2
V_REF = 4.096V (MAX1220/MAX1258),
f_SAMPLE = 225ksps
Acquisition between conversions
DAC
12
INL
DNL Guaranteed monotonic
V_OS (Note 8)
GE (Note 8)
No load
0.02
10kΩ load to either rail
0.1
(Note 11)
AV_DD = 2.7V, V_REF = 2.5V (MAX1257),
gain error < 1%
R_L
AV_DD = 4.75V, V_REF = 4.096V
(MAX1220/MAX1258), gain error < 2%
2000
500
From power-down mode, AV_DD = 5V
From power-down mode, AV_DD = 2.7V
Programmed in from power-down mode
At wake-up or programmed in
power-down mode
TYP
25
40
±0.01
25
40
±0.01
MAX
80
80
±1
80
80
±1
UNITS
µA
µA
±0.5
±3
±10
±5
±8
±4
±1.0
±10
±10
Bits
LSB
LSB
mV
ppm of
FS/°C
LSB
ppm of
FS/°C
AV_DD -
0.02
V
AV_DD -
0.1
0.5
Ω
1
nF
Ω
25
µs
21
1
kΩ
100
kΩ
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