Datasheet

(f
SAMPLE
= 1.6Msps, V
AVDD
= 1.8V, V
DVDD
= 1.8V, V
OVDD
= 1.5V to 3.6V, V
REFVDD
= 3.6V, V
REF
= 3.3V, Internal Ref Buffers On,
T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Differential Nonlinearity
(Note 6)
DNL -0.5 ±0.25 +0.5 LSB
Analog Input CMR CMR DC 5 LSB/V
Power-Supply Rejection
(Note 7)
PSR PSR vs. AVDD 0.6 LSB/V
Power-Supply Rejection
(Note 7)
PSR PSR vs. REFVDD 1 LSB/V
Transition Noise 1.2 LSB
RMS
EXTERNAL REFERENCE
REF Voltage Input Range V
REF
2.5 3.3 3.6 V
Load Current I
REF
1.6Msps, V
REF
= 3.3V 600 µA
REF Input Capacitance 1 nF
REFERENCE BUFFER
REFIN Input Voltage Range V
REFIN
V
REF
< (V
REFVDD
- 200mV) 2.5 3
V
REFVDD
-
200mV
V
REFIN Input Current I
REFIN
1 nA
Turn-On Settling Time
C
EXT
= 10µF on REF pin,
C
REFIN
= 0.1µF on REFIN pin
20 ms
External Compensation
Capacitor
C
EXT
REF pins 4.7 10 µF
DYNAMIC PERFORMANCE (Note 8)
Dynamic Range Internal RefBuffer, -60dBFS input 98.7 dB
Signal-to-Noise Ratio SNR Internal RefBuffer, f
IN
= 10kHz 96.8 98.0 dB
Signal-to-Noise Plus Distortion SINAD
Internal RefBuffer, f
IN
= 10kHz,
-0.1dBFs
96.7 97.9 dB
Spurious-Free Dynamic Range SFDR Internal RefBuffer, f
IN
= 10kHz 125 dB
Total Harmonic Distortion THD Internal RefBuffer, f
IN
= 10kHz -123 dB
Total Harmonic Distortion THD Internal RefBuffer, f
IN
= 100kHz -115 dB
Total Harmonic Distortion THD Internal RefBuffer, f
IN
= 250kHz -107 dB
SAMPLING DYNAMICS
Throughput 0 1.6 Msps
Full-Power Bandwidth
-3dB point (targeting 20MHz) 20
MHz
-0.1dB point 3
Acquisition Time t
ACQ
100 ns
Aperture Delay
Time delay from CNVST rising edge
to time at which sample is taken for
conversion
1 ns
Aperture Jitter 3 ps
RMS
www.maximintegrated.com
Maxim Integrated │ 5
MAX11903 18-Bit, 1.6Msps, Low-Power,
Fully Differential SAR ADC
Electrical Characteristics (continued)