MAX1284-MAX1285 Datasheet, PDF (4/15 Pages) Maxim Integrated Products – 400ksps/300ksps, Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference

400ksps/300ksps, Single-Supply, Low-Power,
Serial 12-Bit ADCs with Internal Reference
ELECTRICAL CHARACTERISTICS—MAX1285 (continued)
(V_DD = +2.7V to +3.0V; 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.)
PARAMETER
SYMBOL
CONDITIONS
MIN
DYNAMIC SPECIFICATIONS (75kHz sine wave, 2.5Vp-p, f_SAMPLE = 300ksps, f_SCLK = 4.8MHz)
Signal-to-Noise Plus Distortion
Ratio
SINAD
Total Harmonic Distortion
THD Up to the 5th harmonic
Spurious-Free Dynamic Range
SFDR
Intermodulation Distortion
Full-Power Bandwidth
IMD
f_IN1 = 73kHz, f_IN2 = 77kHz
-3dB point
Full-Linear Bandwidth
SINAD > 68dB
CONVERSION RATE
Conversion Time (Note 4)
t_CONV
3.3
Track/Hold Acquisition Time
t_ACQ
Aperture Delay
Aperture Jitter
Serial Clock Frequency
t_SCLK
0.5
Duty Cycle
40
ANALOG INPUT (AIN)
Input Voltage Range
V_AIN
0
Input Capacitance
INTERNAL REFERENCE
REF Output Voltage
V_REF
2.48
REF Short-Circuit Current
T_A = +25°C
REF Output Tempco
TC V_REF
Load Regulation (Note 5)
0 to 0.75mA output load
Capacitive Bypass at REF
4.7
DIGITAL INPUTS (SCLK, CS, SHDN)
Input High Voltage
V_INH
2.0
Input Low Voltage
V_INL
Input Hysteresis
V_HYST
Input Leakage
I_IN
V_IN = 0 or V_DD
Input Capacitance
C_IN
DIGITAL OUTPUT (DOUT)
Output Voltage Low
V_OL
I_SINK = 5mA
Output Voltage High
V_OH
I_SOURCE = 0.5mA
4
Three-State Leakage Current
I_L
CS = +3V
Three-State Output Capacitance
C_OUT CS = +3V
POWER SUPPLY
Positive Supply Voltage (Note 6)
VDD
2.7
Positive Supply Current (Note 7)
Shutdown Supply Current
Power-Supply Rejection
IDD
I_SHDN
PSR
V_DD = +3.6V
SCLK = V_DD, SHDN = GND
V_DD = +2.7V to 3.6V, midscale input
TYP
70
-80
80
76
3
250
10
<50
18
2.50
15
±15
0.1
0.2
15
15
2.5
2
±0.5
MAX UNITS
dB
dB
dB
dB
MHz
kHz
µs
625
ns
ns
ps
4.8 MHz
60
%
2.5
V
pF
2.52
V
mA
ppm/°C
2.0 mV/mA
10
µF
V
0.8
V
V
±1
µA
pF
0.4
V
V
±10
µA
pF
3.6
V
3.5
mA
10
µA
±2.0 mV
4 _______________________________________________________________________________________