Datasheet
MAX1084/MAX1085
400ksps/300ksps, Single-Supply, Low-Power,
Serial 10-Bit ADCs with Internal Reference
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS—MAX1085 (continued)
(V
DD
= +2.7V to +3.6V, f
SCLK
= 4.8MHz, 50% duty cycle, 16 clocks/conversion cycle (300ksps), 4.7µF capacitor at REF, T
A
= T
MIN
to
T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
SINAD > 58dB
-3dB point
f
IN1
= 99kHz, f
IN2
=102kHz
Up to the 5th harmonic
CONDITIONS
ps
< 50
Aperture Jitter
ns
10
Aperture Delay
ns
625
t
ACQ
Track/Hold Acquisition Time
µs
3.3
t
CONV
Conversion Time (Note 4)
kHz
250
Full-Linear Bandwidth
MHz
3
Full-Power Bandwidth
dB
76
IMDIntermodulation Distortion
dB
70
SFDRSpurious-Free Dynamic Range
dB
-70
THDTotal Harmonic Distortion
dB
60
SINAD
Signal-to-Noise Plus Distortion
Ratio
UNITSMIN TYP MAXSYMBOLPARAMETER
I
SINK
= 5mA
V
IN
= 0V or V
DD
T
A
= +25°C
0 to 0.75mA output load
V
0.4
V
OL
Output Voltage Low
pF
15
C
IN
Input Capacitance
µA
±1
I
IN
Input Leakage
V
0.2
V
HYST
Input Hysteresis
V
0.8
V
INL
Input Low Voltage
V
2.0
V
INH
Input High Voltage
µF
4.7 10
Capacitive Bypass at REF
mV/mA
0.1 2.0
Load Regulation (Note 5)
ppm/°C
±15
TC V
REF
REF Output Tempco
%
40 60
MHz
0.5 4.8
f
SCLK
Serial Clock Frequency
Duty Cycle
mA
15
REF Short Circuit Current
V
2.48 2.50 2.52
V
REF
REF Output Voltage
V
0 2.5
V
AIN
Input Voltage Range
pF
18
C
IN
Input Capacitance
V
CS
= 3V
V
CS
= 3V
I
SOURCE
= 0.5mA
pF
15
C
OUT
Three-State Output Capacitance
µA
±10
I
L
Three-State Leakage Current
V
V
DD
-
0.5V
V
OH
Output Voltage High
V
2.7 3.6
V
DD
Positive Supply Voltage (Note 6)
V
DD
= 3.6V mA
2.5 3.5
I
DD
Positive Supply Current (Note 7)
SCLK = V
DD
, SHDN = GND
µA
210
I
SHDN
Shutdown Supply Current
V
DD
= 2.7V to 3.6V, midscale input mV
±0.5 ±2.0
PSRPower-Supply Rejection
DYNAMIC SPECIFICATIONS (75kHz sinewave, 2.5V
P-P
, f
SAMPLE
= 300ksps, f
SCLK
= 4.8MHz)
CONVERSION RATE
INTERNAL REFERENCE
DIGITAL INPUTS (SCLK,CS, SHDN)
DIGITAL OUTPUTS (DOUT)
ANALOG INPUT
POWER SUPPLY