Datasheet

MAX1117/MAX1118/MAX1119
Single-Supply, Low-Power,
2-Channel, Serial 8-Bit ADCs
_______________________________________________________________________________________ 3
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
EXTERNAL REFERENCE (MAX1118 ONLY)
Input Voltage Range
1.0 V
DD
V
Input Current Ave, V
DD
= REF = +5.5V at 100ksps
10 20
µA
POWER REQUIREMENTS
MAX1118
2.7 5.5
MAX1117
2.7 5.5
Supply Voltage V
DD
MAX1119
4.5 5.5
V
MAX1119, f
SAMPLE
= 100ksps,
zero-scale input
182 230
MAX1117/MAX1118, f
SAMPLE
= 100ksps,
zero-scale input
135 190
MAX1119, f
SAMPLE
= 10ksps,
zero-scale input
19 25
MAX1117/MAX1118, f
SAMPLE
= 10ksps,
zero-scale input
14 21
Supply Current (Note 2) I
DD
Shutdown
0.8 10
µA
Supply Rejection Ratio PSRR Full-scale or 0 input
±0.5 ±1
LSB/V
DIGITAL INPUTS (CNVST AND SCLK)
Input High Voltage V
IH
2
V
Input Low Voltage V
IL
0.8
V
Input Hystersis
V
HYST
0.2
V
Input Current High I
IH
±10
µA
Input Current Low I
IL
±10
µA
Input Capacitance C
IN
2
pF
DIGITAL OUTPUT (DOUT)
Output High Voltage V
OH
I
SOURCE
= 2mA
V
DD
- 0.5
V
I
SINK
= 2mA
0.4
V
Output Low Voltage V
OL
I
SINK
= 4mA
0.8
V
Three-State Leakage Current I
L
±0.01 ±10
µA
Three-State Output Capacitance
C
OUT
4
pF
TIMING CHARACTERISTICS (Figures 6a–6d)
CNVST High Time t
csh
100
ns
CNVST Low Time t
csi
100
ns
Conversion Time t
conv
7.5
µs
Serial Clock High Time t
ch
75
ns
Serial Clock Low Time t
cl
75
ns
Serial Clock Period t
cp
200
ns
Falling of CNVST to DOUT Active
t
csd
C
LOAD
= 100pF, Figure 1
100
ns
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +3.6V (MAX1117), V
DD
= +4.5V to +5.5V (MAX1119), V
DD
= REF = +2.7V to +5.5V (MAX1118),T
A
= T
MIN
to T
MAX
,
unless otherwise noted.)