Rainbow Electronics MAX11043 - Manual (Page 7)

MAX11043
4-Channel, 16-Bit, Simultaneous-Sampling ADCs
with PGA, Filter, and 8-/12-Bit Dual-Stage DAC
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Note 1: Devices 100% production tested at T A = +125°C. Guaranteed by design and characterization to T A = -40°C.
Note 2: Full scale in analog EQ mode decreases with increasing frequency at a rate of 20dB/decade from 5kHz. If digital EQ is also
used, full scale decreases with increasing frequency at 40dB/decade from 5kHz.
Note 3: SFDR in the EQ mode is normalized to the input by subtracting the analog EQ gain at each frequency (20dB/decade) from
the FFT results.
Note 4: The absolute input voltage range is 0 to AVDD. For optimal performance, use a common-mode voltage of AVDD/2.
Note 5: Switched capacitor input impedance is proportional to 1/fC. Where f is the sampling frequency and C is the input capacitance.
ELECTRICAL CHARACTERISTICS (continued)
((V AVDD = +3.0V to +3.6V, V DVDD = +3.0V, C DVREG = 10µF, V AGND = V DGND = 0, common-mode input voltage = AVDD/2, V REFBP =
V REFA = V REFB = V REFC = V REFD = +2.5V (external reference), V REFDAC = V REFDACH = +1.25V (external reference), V REFDACL = 0,
C REFBP = C REFA = C REFB = C REFC = C REFD = C REFDAC = 1µF, f SCLK = 38.4MHz, f EXCLK = 38.4MHz (external clock applied to
OSCIN), clock divider set to 4, SHDN = DACSTEP = UP/DWN = DGND, CONVRUN = DVDD, all analog inputs driven directly through
a series 150Ω/330pF anti-alias filter, PGA gain = 1. Default filters and gain settings. T
A = T MIN to T MAX , unless otherwise noted (Note 1).
Typical values are at T A = +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SPI INTERFACE
SCLK Clock Period t CP 25 ns
SCLK Pulse-Width High t CH 10 ns
SCLK Pulse-Width Low t CL 10 ns
SCLK Rise to DOUT Transition t DOT C LOAD = 20pF 1 15 ns
CS Fall to SCLK Rise Setup Time t CSS 10 ns
SCLK Rise to CS Rise Setup Time t CSH 5 ns
DIN to SCLK Rise Setup Time t DS 10 ns
DIN to SCLK Rise Hold Time t DH 0 ns
CS Pulse-Width High t CSPWH 10 ns
CS Rise to DOUT Disable t DOD C LOAD = 20pF 20 ns
CS Fall to DOUT Enable t DOE C LOAD = 20pF 1 ns
EOC Fall to CS Fall t RDS 10 ns
Typical Operating Characteristics
(V AVDD = +3.3V, V DVDD = +3.0V, f SCLK = f EXCLK = 19.2MHz, V REFBP , V REF_ = +2.5V, common-mode input voltage = AVDD/2,
T A = +25°C, unless otherwise noted.)
INL vs. CODE
MAX11043 toc01
CODE (LSB)
INL (LSB)
49152 32768 16384
-4
-3
-2
-1
0
1
2
3
4
5
-5
0 65536
LP MODE
GAIN = 1
400ksps FFT
LP MODE
MAX11043 toc02
FREQUENCY (kHz)
AMPLITUDE (dBFS)
180 160 140 120 100 80 60 40 20
-100
-80
-60
-40
-20
0
-120
0 200
f IN = 50kHz
GAIN = 1
800ksps FFT
LP MODE
MAX11043 toc03
FREQUENCY (kHz)
AMPLITUDE (dBFS)
350 300 250 200 150 100 50
-120
-100
-80
-60
-40
-20
0
-140
0 400
f IN = 50kHz
GAIN = 1