Rainbow Electronics MAX1083 - Manual (Page 5)

MAX1082/MAX1083
300ksps/400ksps, Single-Supply, 4-Channel,
Serial 10-Bit ADCs with Internal Reference
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ELECTRICAL CHARACTERISTICS—MAX1083 (continued)
(V DD1 = V DD2 = +2.7V to +3.6V, COM = GND, f OSC = 4.8MHz, 50% duty cycle, 16 clocks/conversion cycle (300ksps), external
+2.5V at REF, REFADJ = V DD1 , T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)
Normal operating mode
Normal operating mode
Normal operating mode
CONDITIONS
MHz 0.5 4.8 f SCLK Serial Clock Frequency
ps <50 Aperture Jitter
ns 10 Aperture Delay
ns 625 t ACQ Track/Hold Acquisition Time
µs 3.3 t CONV Conversion Time (Note 5)
UNITS MIN TYP MAX SYMBOL PARAMETER
To power down the internal reference
For small adjustments, from 1.22V
0 to 0.75mA output load
On/off leakage current, V CH_ = 0 or V DD1
T A = +25°C
Bipolar, V COM or V CH_ = V REF /2,
referenced to COM or CH_
Unipolar, V COM = 0
V/V 2.05 Buffer Voltage Gain
V 1.4 V DD1 - 1
REFADJ Buffer Disable
Threshold
mV ±100 REFADJ Input Range
V 1.22 REFADJ Output Voltage
µF 0.01 10 Capacitive Bypass at REFADJ
µF 4.7 10 Capacitive Bypass at REF
mV/mA 0.1 2.0 Load Regulation (Note 7)
ppm/°C ±15 TC V REF
REF Output Temperature
Coefficient
mA 15 REF Short-Circuit Current
V 2.480 2.500 2.520 V REF REF Output Voltage
pF 18 Input Capacitance
µA ±0.001 ±1 Multiplexer Leakage Current
±V REF /2
% 40 60 Duty Cycle
V
V REF
V
CH_
Input Voltage Range, Single
Ended and Differential (Note 6)
V
IN
= 0 or V
DD2
In full power-down mode, f SCLK = 0
V
REF
= 2.500V, f
SCLK
= 0
V REF = 2.500V, f SCLK = f MAX
(Note 8)
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
5
REF Input Current 320 µA
200 350
V
1.0 V DD1 +
50mV
REF Input Voltage Range
V/V +2.05 Buffer Voltage Gain
CONVERSION RATE
ANALOG INPUTS (CH3–CH0, COM)
INTERNAL REFERENCE
EXTERNAL REFERENCE (reference buffer disabled, reference applied to REF)
DIGITAL INPUTS (DIN, SCLK, CS, SHDN)