Datasheet

µA
MAX146/MAX147
+2.7V, Low-Power, 8-Channel,
Serial 12-Bit ADCs
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +3.6V (MAX146); V
DD
= +2.7V to +5.25V (MAX147); COM = 0; f
SCLK
= 2.0MHz; external clock (50% duty cycle); 15
clocks/conversion cycle (133ksps); MAX146—4.7µF capacitor at VREF pin; MAX147—external reference, VREF = 2.500V applied to
VREF pin; T
A
= T
MIN
to T
MAX
; unless otherwise noted.)
V
3.0
V
IH
V
DD
= 3.6V
DIN, SCLK, CS Input High Voltage
V
DD
> 3.6V, MAX147 only
mV±0.3PSRSupply Rejection (Note 10)
Full-scale input, external reference = 2.5V,
V
DD
= 2.7V to V
DD(MAX)
pF15C
IN
DIN, SCLK, CS Input Capacitance
µA±0.01 ±1I
IN
DIN, SCLK, CS Input Leakage
V0.2V
HYST
DIN, SCLK, CS Input Hysteresis
V0.8V
IL
DIN, SCLK, CS Input Low Voltage
2.0
µA±4.0I
S
SHDN Input Current
V0.4V
SL
SHDN Input Low Voltage
VV
DD
- 0.4V
SH
SHDN Input High Voltage
SHDN = 0V or V
DD
nA±100
SHDN Maximum Allowed
Leakage, Mid Input
VV
DD
/ 2V
FLT
SHDN Voltage, Floating
SHDN = FLOAT
SHDN = FLOAT
UNITSMIN TYP MAXSYMBOLPARAMETER
(Note 9)
V
IN
= 0V or V
DD
V
DD
≤ 3.6V
I
DD
CONDITIONS
Positive Supply Current, MAX146
µA
1.2 2.0
µA±0.01 ±10I
L
Three-State Leakage Current
VV
DD
- 0.5V
OH
Output Voltage High
V
0.8
V
OL
Output Voltage Low
0.4
2.70 3.60
pF15C
OUT
Three-State Output Capacitance
MAX146
CS = V
DD
(Note 9)
CS = V
DD
I
SOURCE
= 0.5mA
I
SINK
= 16mA
I
SINK
= 5mA
V
2.70 5.25
V
DD
Positive Supply Voltage
MAX147
0.9 1.5
Operating mode,
full-scale input
V
DD
= 5.25V
V
DD
= 3.6V
2.1 15V
DD
= 5.25V
V
DD
= 3.6V 1.2 10
Full power-down
mA
1.8 2.5
30 70
1.2 10
Operating mode, full-scale input
Fast power-down
Full power-down
mA
V1.1 V
DD
- 1.1V
SM
SHDN Input Mid Voltage
I
DD
Positive Supply Current, MAX147
DIGITAL INPUTS (DIN, SCLK, CS, SHDN)
DIGITAL OUTPUTS (DOUT, SSTRB)
POWER REQUIREMENTS
I
DD
Positive Supply Current, MAX147 µA