MAX1221 Datasheet, PDF (5/44 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
SYMBOL
CONDITIONS
Wake-Up Time (Note 12)
1kΩ Output Termination
From power-down mode, AV_DD = 5V
From power-down mode, AV_DD = 2.7V
Programmed in power-down mode
100kΩ Output Termination
At wake-up or programmed in
power-down mode
DYNAMIC PERFORMANCE (Notes 5, 13)
Output-Voltage Slew Rate
SR Positive and negative
Output-Voltage Settling Time
Digital Feedthrough
t_S
To 1 LSB, 400 - C00 hex (Note 7)
Code 0, all digital inputs from 0 to DV_DD
Major Code Transition Glitch
Impulse
Between codes 2047 and 2048
Output Noise (0.1Hz to 50MHz)
From V_REF
Using internal reference
Output Noise (0.1Hz to 500kHz)
From V_REF
Using internal reference
DAC-to-DAC Transition
Crosstalk
INTERNAL REFERENCE
REF1 Output Voltage
REF1 Temperature Coefficient
REF1 Short-Circuit Current
EXTERNAL-REFERENCE INPUT
TC_REF
V_REF = 2.5V
REF1 Input Voltage Range
REF1 Input Impedance
V_REF1
R_REF1
REF modes 01, 10, and 11 (Note 4)
DIGITAL INTERFACE
DIGITAL INPUTS (SCLK, DIN, CS, CNVST, LDAC)
Input-Voltage High
V_IH DV_DD = 2.7V to 5.25V
Input-Voltage Low
V_IL
DV_DD = 3.6V to 5.25V
DV_DD = 2.7V to 3.6V
Input Leakage Current
I_L
Input Capacitance
C_IN
DIGITAL OUTPUT (DOUT) (Note 14)
Output-Voltage Low
V_OL I_SINK = 2mA
MIN
3
2.482
0.7
70
2.4
TYP
MAX
25
21
1
100
2
5
0.5
4
660
720
260
320
0.5
2.50 2.518
±30
0.39
AV_DD
100
130
0.8
0.6
±0.01 ±10
15
0.4
UNITS
µs
kΩ
kΩ
V/µs
µs
nV•s
nV•s
µV_P-P
µV_P-P
nV•s
V
ppm/°C
mA
V
kΩ
V
V
µA
pF
V
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