
MAX1084/MAX1085
400ksps/300ksps, Single-Supply, Low-Power,
Serial 10-Bit ADCs with Internal Reference
4
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ELECTRICAL CHARACTERISTICS—MAX1085 (continued)
(VDD = +2.7V to +3.6V, fSCLK = 4.8MHz, 50% duty cycle, 16 clocks/conversion cycle (300ksps), 4.7F capacitor at REF, TA = TMIN to
TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
SINAD > 58dB
-3dB point
fIN1 = 99kHz, fIN2 =102kHz
Up to the 5th harmonic
CONDITIONS
ps
< 50
Aperture Jitter
ns
10
Aperture Delay
ns
625
tACQ
Track/Hold Acquisition Time
s
3.3
tCONV
Conversion Time (Note 4)
kHz
250
Full-Linear Bandwidth
MHz
3
Full-Power Bandwidth
dB
76
IMD
Intermodulation Distortion
dB
70
SFDR
Spurious-Free Dynamic Range
dB
-70
THD
Total Harmonic Distortion
dB
60
SINAD
Signal-to-Noise Plus Distortion
Ratio
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
ISINK = 5mA
VIN = 0V or VDD
TA = +25°C
0 to 0.75mA output load
V
0.4
VOL
Output Voltage Low
pF
15
CIN
Input Capacitance
A
±1
IIN
Input Leakage
V
0.2
VHYST
Input Hysteresis
V
0.8
VINL
Input Low Voltage
V
2.0
VINH
Input High Voltage
F
4.7
10
Capacitive Bypass at REF
mV/mA
0.1
2.0
Load Regulation (Note 5)
ppm/°C
±15
TC VREF
REF Output Tempco
%
40
60
MHz
0.5
4.8
fSCLK
Serial Clock Frequency
Duty Cycle
mA
15
REF Short Circuit Current
V
2.48
2.50
2.52
VREF
REF Output Voltage
V
0
2.5
VAIN
Input Voltage Range
pF
18
CIN
Input Capacitance
VCS = 3V
ISOURCE = 0.5mA
pF
15
COUT
Three-State Output Capacitance
A
±10
IL
Three-State Leakage Current
V
VDD - 0.5V
VOH
Output Voltage High
V
2.7
3.6
VDD
Positive Supply Voltage (Note 6)
VDD = 3.6V
mA
2.5
3.5
IDD
Positive Supply Current (Note 7)
SCLK = VDD, SHDN = GND
A
210
ISHDN
Shutdown Supply Current
VDD = 2.7V to 3.6V, midscale input
mV
±0.5
±2.0
PSR
Power-Supply Rejection
DYNAMIC SPECIFICATIONS (75kHz sinewave, 2.5VP-P, fSAMPLE = 300ksps, fSCLK = 4.8MHz)
CONVERSION RATE
INTERNAL REFERENCE
DIGITAL INPUTS (SCLK,CS, SHDN)
DIGITAL OUTPUTS (DOUT)
ANALOG INPUT
POWER SUPPLY