Datasheet

3Maxim Integrated
MAX11321–MAX11328
1Msps, 10-/12-Bit, 4-/8-/16-Channel ADCs with
Post-Mux External Signal Conditioning Access
ELECTRICAL CHARACTERISTICS (MAX11322/MAX11325/MAX11328) (continued)
(V
DD
= 2.35V to 3.6V, V
OVDD
= 1.5V to 3.6V, f
SAMPLE
= 1Msps, f
SCLK
= 16MHz, 50% duty cycle, V
REF+
= V
DD
, T
A
= -40NC to +125NC,
unless otherwise noted. Typical values are at T
A
= +25NC.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Crosstalk
-0.5dB below full-scale of 99.2432kHz
sine wave input to the channel being
sampled, apply full-scale 69.2139kHz
sine wave signal to all 15 nonselected
input channels.
-88 dB
CONVERSION RATE
Power-Up Time t
PU
Conversion cycle, external clock 2 Cycles
Acquisition Time t
ACQ
156 ns
Conversion Time t
CONV
Internally clocked (Note 8) 5.9 µs
Externally clocked, f
SCLK
= 16MHz,
16 cycles (Note 8)
1000 ns
External Clock Frequency f
SCLK
0.16 16 MHz
Aperture Delay 8 ns
Aperture Jitter RMS 30 ps
ANALOG INPUT
Input Voltage Range V
INA
Unipolar, (single ended and pseudo-
differential)
0 V
REF+
V
Bipolar
(Note 9)
Range bit set to 0 -V
REF+
/2 V
REF+
/2
Range bit set to 1 -V
REF+
V
REF+
Absolute Input Voltage Range AIN+, AIN- relative to GND -0.1 V
REF+
+ 0.1 V
Static Input Leakage Current I
ILA
V
AIN
= V
DD
, GND -0.1 Q1.5 FA
Input Capacitance C
AIN
During acquisition time;
RANGE bit = 0 (Note 10)
15
pF
During acquisition time;
RANGE bit = 1 (Note 10)
7.5
EXTERNAL REFERENCE INPUT
REF- Input Voltage Range V
REF-
-0.3 +1 V
REF+ Input Voltage Range V
REF+
1 V
DD
+ 50mV V
REF+ Input Current I
REF+
V
REF+
= 2.5V, f
SAMPLE
= 1Msps 36.7
FA
V
REF+
= 2.5V, f
SAMPLE
= 0Msps 0.1
DIGITAL INPUTS (SCLK, DIN, CS, CNVST)
Input Voltage Low V
IL
V
OVDD
O 0.25
V
Input Voltage High V
IH
V
OVDD
O 0.75
V
Input Hysteresis V
HYST
V
OVDD
O 0.15
mV