Datasheet

9
MAX11135–MAX11143
500ksps, Low-Power, Serial 12-/10-/8-Bit,
4-/8-/16-Channel ADCs
ELECTRICAL CHARACTERISTICS (MAX11141/MAX11142/MAX11143) (continued)
(V
DD
= 2.35V to 3.6V, V
OVDD
= 1.5V to 3.6V, f
SAMPLE
= 500ksps, f
SCLK
= 8MHz, 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
DYNAMIC PERFORMANCE (250kHz, input sine wave) (Notes 3 and 7)
Signal-to-Noise Plus Distortion SINAD 49 49.6 dB
Signal-to-Noise Ratio SNR 49 49.6 dB
Total Harmonic Distortion
(Up to the 5th Harmonic)
THD -77 -65 dB
Spurious-Free Dynamic Range SFDR 63 69 dB
Intermodulation Distortion IMD f
1
= 249.878kHz, f
2
= 219.97kHz -75 dB
Full-Power Bandwidth
-3dB 50 MHz
-0.1dB 7.5 MHz
Full-Linear Bandwidth SINAD > 49dB 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
312 ns
Conversion Time t
CONV
Internally clocked
f
SAMPLE
= 500ksps
(Note 8)
5.9 µs
Externally clocked, f
SCLK
= 8MHz, 16
cycles (Note 8)
2000 ns
External Clock Frequency f
SCLK
0.16 8 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