
MAX1391/MAX1394
falling edge of the sampling clock and the instant when
an actual sample is taken.
Aperture Jitter
Aperture jitter (tAJ) is the sample-to-sample variation in
the aperture delay (Figure 14).
DC Power-Supply Rejection Ratio (PSRR)
DC PSRR is defined as the change in the positive full-
scale transfer function point caused by a full range vari-
ation in the analog power-supply voltage (VDD).
Chip Information
TRANSISTOR COUNT: 9106
PROCESS: BiCMOS
16
______________________________________________________________________________________
1.5V to 3.6V, 416ksps, 1-Channel True-Differential/
2-Channel Single-Ended, 8-Bit, SAR ADCs
tAD
T/H
(INTERNAL
SIGNAL)
SCLK
tAJ
TRACK
HOLD
ANALOG
INPUT
SAMPLED
DATA
THIRD FALLING EDGE
Figure 14. T/H Aperture Timing
AIN+ (AIN1)*
DOUT
SCLK
AIN- (AIN2)*
*INDICATES THE MAX1394
REF
INPUT
VOLTAGE
2 x AA CELLS
CPU
+
-
VDD
GND
REF
INPUT
VOLTAGE
0.1
μF
0.1
μF
CS
OE
(CH1/CH2)*
MISO
SCL
SS
MAX1391
MAX1394
UNI/BIP
Typical Operating Circuit