MAX1108 Datasheet, PDF (5/20 Pages) Maxim Integrated Products – Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs

Single-Supply, Low-Power,
2-Channel, Serial 8-Bit ADCs
ELECTRICAL CHARACTERISTICS—MAX1109 (continued)
(V_DD = +4.5V to +5.5V; unipolar input mode; COM = GND, f_SCLK = 500kHz, external clock (50% duty cycle); 10 clocks/conversion
cycle (50ksps); 1µF capacitor at REF, external +4.096V reference at REF; T_A = T_MIN to T_MAX; unless otherwise noted. Typical values
are at T_A = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
DYNAMIC PERFORMANCE (10kHz sine-wave input, 4.096Vp-p, 50ksps, 500kHz external clock)
Signal-to-Noise Plus Distortion SINAD
49
dB
Total Harmonic Distortion
(up to the 5th harmonic)
THD
-70
dB
Spurious Free Dynamic Range
Small-Signal Bandwidth
Full-Power Bandwidth
ANALOG INPUTS
Input Voltage Range (Note 4)
SFDR
BW_-3dB -3dB rolloff
V_{CH_}
Unipolar input, V_COM = 0
Bipolar input, V_COM or V_CH1 = V_REF / 2,
referenced to COM or CH1
68
dB
1.5
MHz
0.8
MHz
0
V_REF
V
±V_REF / 2
Multiplexer Leakage Current
Input Capacitance
TRACK/HOLD
Conversion Time (Note 5)
Track/Hold Acquisition Time
Aperture Delay
Aperture Jitter
Internal Clock Frequency
On/off-leakage current,
V_CH = 0 or V_DD
C_IN
t_CONV
t_ACQ
Internal clock
External clock, 500kHz, 10 sclks/conv
External clock, 2MHz
External Clock Frequency Range
INTERNAL REFERENCE
Output Voltage
REF Short-Circuit Current
REF Tempco
Load Regulation
Capacitive Bypass at REF
EXTERNAL REFERENCE
Input Voltage Range
Input Current
V_REF
I_REFSC
For data transfer only
0 to 0.5mA (Note 7)
+4.096V at REF, full scale,
500kHz external clock
±0.01 ±1
µA
18
pF
35
µs
20
1
µs
10
ns
<50
ps
400
kHz
50
500 kHz
2
MHz
3.936
1
4.096
5
±50
2.5
4.256
V
mA
ppm/°C
mV
µF
1.0
V_DD + 0.05 V
1
20
µA
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