User Manual

µA
MAX125/MAX126
2x4-Channel, Simultaneous-Sampling
14-Bit DAS
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(AV
DD
= +5V ±5%, AV
SS
= -5V ±5%, DV
DD
= +5V ±5%, V
REFIN
= 2.5V, AGND = DGND = 0V, 4.7µF capacitor from REFOUT to
AGND, 0.1µF capacitor from REFIN to AGND, f
CLK
= 16MHz, external clock, 50% duty cycle, T
A
= T
MIN
to T
MAX
, unless otherwise
noted.)
CONDITIONS UNITSMIN TYP MAXSYMBOLPARAMETER
MAX125
V
±5
V
IN
Input Voltage Range
MAX125, V
IN
= ±5V
µA±667I
IN
Input Current
(Note 7) pF16C
IN
Input Capacitance
µs1t
ACQ
Acquisition Time
MHz8Small-Signal Bandwidth
MHz0.5Full-Power Bandwidth
mV/ms2Droop Rate
ns5Aperture Delay
ps
RMS
30Aperture Jitter
ps500Aperture-Delay Matching
T
A
= +25°C V2.475 2.500 2.525V
REFOUT
Output Voltage
0mA < I
LOAD
< 1mA %±1External Load Regulation
(Note 9) ppm/°C30REFOUT Tempco
µF0.1
External Capacitive
Bypass at REFIN
V2.50 ±10%Input Voltage Range
µF4.7 22
External Capacitive
Bypass at REFOUT
REFIN = 2.5V µA±10Input Current
(Note 10) kΩ10Input Resistance
(Note 7) pF10Input Capacitance
MHz0.1 16External Clock Frequency
V2.4V
IH
Input High Voltage
V0.8V
IL
Input Low Voltage
CONVST, RD, WR, CS, CLK
±1
(Note 7) pF15C
IN
Input Capacitance
A0–A3
µA
±10
I
IN
Input Current
MAX126 ±2.5
MAX126, V
IN
= ±2.5V
ANALOG INPUT
TRACK/HOLD
REFERENCE OUTPUT (Note 8)
REFERENCE INPUT
EXTERNAL CLOCK
DIGITAL INPUTS (CONVST, RD, WR, CS, CLK, A0–A3) (Note 1)