Datasheet

MAX11120–MAX11128
1Msps, Low-Power, Serial 12-/10-/8-Bit,
4-/8-/16-Channel ADCs
3Maxim Integrated
ELECTRICAL CHARACTERISTICS (MAX11122/MAX11125/MAX11128) (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
Full-Power Bandwidth
-3dB 50
MHz
-0.1dB 7.5
Full-Linear Bandwidth SINAD > 70dB 1.5 MHz
Crosstalk
-0.5dB below full scale of
249.878kHz sine wave input to the
channel being sampled, apply full-
scale 219.97kHz 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 ±1.5
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
= 0 0.1