Electrical characteristics (continued) – Rainbow Electronics MAX149 User Manual
Page 4
I
DD
MAX148/MAX149
+2.7V to +5.25V, Low-Power, 8-Channel,
Serial 10-Bit ADCs
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
V
DD
= +2.7V to +5.25V; COM = 0V; f
SCLK
= 2.0MHz; external clock (50% duty cycle); 15 clocks/conversion cycle (133ksps);
MAX149—4.7µF capacitor at VREF pin; MAX148—external reference, VREF = 2.500 V applied to VREF pin; T
A
= T
MIN
to T
MAX
; unless
otherwise noted.)
V
3.0
V
IH
DIN, SCLK, CS Input High Voltage
V
DD
> 3.6V
mV
±0.3
PSR
Supply Rejection (Note 12)
Full-scale input, external reference = 2.500V,
V
DD
= 2.7V to 5.25V
pF
15
C
IN
DIN, SCLK, CS Input Capacitance
µA
±0.01
±1
I
IN
DIN, SCLK, CS Input Leakage
V
0.2
V
HYST
DIN, SCLK, CS Input Hysteresis
V
0.8
V
IL
DIN, SCLK, CS Input Low Voltage
2.0
µA
±4.0
I
S
SHDN Input Current
V
0.4
V
SL
SHDN Input Low Voltage
V
V
DD
- 0.4
V
SH
SHDN Input High Voltage
SHDN = 0V or V
DD
nA
±100
SHDN Maximum Allowed
Leakage, Mid Input
V
V
DD
/ 2
V
FLT
SHDN Voltage, Floating
SHDN = FLOAT
SHDN = FLOAT
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
(Note 10)
V
IN
= 0V or V
DD
V
DD
≤
3.6V
CONDITIONS
µA
±0.01
±10
I
L
Three-State Leakage Current
V
V
DD
- 0.5
V
OH
Output Voltage High
V
0.8
V
OL
Output Voltage Low
0.4
pF
15
C
OUT
Three-State Output Capacitance
CS = V
DD
(Note 10)
CS = V
DD
I
SOURCE
= 0.5mA
I
SINK
= 16mA
I
SINK
= 5mA
2.70
5.25
1.2
2.0
Operating mode,
full-scale input (Note 11)
3.5
15
Full power-down
1.2
10
mA
1.6
3.0
V
1.1
V
DD
- 1.1
V
SM
SHDN Input Mid Voltage
Positive Supply Current
V
DD
Positive Supply Voltage
V
I
DD
µA
30
70
DIGITAL INPUTS
(DIN, SCLK, CS, SHDN)
DIGITAL OUTPUTS
(DOUT, SSTRB)
POWER REQUIREMENTS
Fast power-down (MAX149)
I
DD
V
DD
= 5.25V
V
DD
= 3.6V
V
DD
= 5.25V
V
DD
= 3.6V