Rainbow Electronics MAX1109 - Manual (Page 5)

MAX1108/MAX1109
Single-Supply, Low-Power,
2-Channel, Serial 8-Bit ADCs
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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.)
ps <50 Aperture Jitter
ns 10 Aperture Delay
kHz 400 Internal Clock Frequency
0 to 0.5mA (Note 7) ppm/°C ±50 REF Tempco
mA
CONDITIONS
5 I REFSC REF Short-Circuit Current
mV 2.5 Load Regulation
kHz 50 500
V
V 3.936 4.096 4.256 V REF Output Voltage
+4.096V at REF, full scale,
500kHz external clock
µA 1 20 Input Current
1.0 V DD + 0.05 Input Voltage Range
µF 1 Capacitive Bypass at REF
UNITS MIN TYP MAX SYMBOL PARAMETER
External clock, 2MHz
dB SINAD Signal-to-Noise Plus Distortion 49
µs 1 t ACQ Track/Hold Acquisition Time
External clock, 500kHz, 10 sclks/conv
Internal clock
µs
20
t CONV Conversion Time (Note 5)
35
SFDR Spurious Free Dynamic Range dB
dB
68
THD
Total Harmonic Distortion
(up to the 5th harmonic)
-70
Full-Power Bandwidth MHz
Unipolar input, V COM = 0 0 V REF
-3dB rolloff MHz
0.8
BW -3dB Small-Signal Bandwidth 1.5
V CH_ Input Voltage Range (Note 4) V
Multiplexer Leakage Current µA
On/off-leakage current,
V
CH = 0 or V DD
±0.01 ±1
pF C IN Input Capacitance 18
Bipolar input, V COM or V CH1 = V REF / 2,
referenced to COM or CH1
±V REF / 2
MHz 2
External Clock Frequency Range
DYNAMIC PERFORMANCE (10kHz sine-wave input, 4.096Vp-p, 50ksps, 500kHz external clock)
ANALOG INPUTS
TRACK/HOLD
EXTERNAL REFERENCE
INTERNAL REFERENCE
For data transfer only