MAX1272 Datasheet, PDF (4/20 Pages) Maxim Integrated Products – Fault-Protected, 12-Bit ADCs with Software-Selectable Input Range

Fault-Protected, 12-Bit ADCs
with Software-Selectable Input Range
ELECTRICAL CHARACTERISTICS (continued)
(V_DD = 4.75V to 5.25V, unipolar/bipolar input range, external reference mode, V_REF = 4.096V, C_REF = 1.0µF, f_SCLK = 1.4MHz,
50% duty cycle, C_LOAD = 50pF, T_A = T_MIN to T_MAX, unless otherwise noted. Typical values are at T_A = +25°C.)
PARAMETERS
Input Current
POWER REQUIREMENTS
Supply Voltage
Supply Current
(Internal Reference Mode)
SYMBOL
V_DD
I_DD
Supply Current
(External Reference Mode)
I_DD
Power-Supply Rejection
Ratio (Note 3)
PSRR
TIMING
Clock Frequency Range
T/H Acquisition Time
Conversion Time
f_SCLK
t_ACQ
t_CONV
Throughput Rate
Internal Reference Settling Time
Device Power-Up Time
DIGITAL INPUTS (DIN, SCLK, and CS)
Input High-Threshold Voltage
V_IH
Input Low-Threshold Voltage
V_IL
Input Hysteresis
Input Leakage Current
V_HYS
I_IN
Input Capacitance
C_IN
DIGITAL OUTPUT (DOUT)
Output Voltage Low
V_OL
CONDITIONS
Converting
V_REF = 4.096V
Standby power-down
mode
Full power-down mode
Converting
Bipolar
Unipolar
Standby power-down mode
Full power-down mode
Converting
Bipolar
Unipolar
Standby power-down mode
Full power-down mode
External reference = 4.096V
Internal reference
(Note 4)
(Note 4)
REF bypass capacitor initially discharged
External reference mode
V_IN = 0 to V_DD
I_SINK = 10mA
I_SINK = 16mA
Output Voltage High
V_OH
I_SOURCE = 0.5mA
Three-State Leakage Current
Three-State Output Capacitance
I_L
C_OUT
CS = V_DD
CS = V_DD
MIN TYP MAX UNITS
400 850
5
10
µA
1
4.75
5
5.25
V
2.4
4
mA
2.2
3
400 700
µA
1
1.5
2.5
mA
1.2
2.0
200 450
µA
1
±0.3
±1.0
LSB
±0.5
0.1
1.4
MHz
2.85
µs
8.57
µs
87.5 ksps
2
ms
10
µs
2.4
V
0.8
V
0.2
V
-10
+10
µA
15
pF
0.4
V
0.6
V_DD
V
- 0.5
-10
+10
µA
15
pF
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