Datasheet

MAX19706
10-Bit, 22Msps, Ultra-Low-Power
Analog Front-End
12 ______________________________________________________________________________________
Tx DAC SPURIOUS-FREE DYNAMIC
RANGE vs. OUTPUT FREQUENCY
MAX19706 toc24
OUTPUT FREQUENCY (MHz)
SFDR (dBc)
10987654321
73
76
79
82
85
70
011
Tx DAC SPURIOUS-FREE DYNAMIC
RANGE vs. OUTPUT AMPLITUDE
MAX19706 toc25
OUTPUT AMPLITUDE (dBFS)
SFDR (dBc)
-5-10-15-20-25
40
50
60
70
80
90
30
-30 0
f
OUT
= 2.2MHz
Tx DAC CHANNEL-ID TWO-TONE
SPECTRAL PLOT
MAX19706 toc28
FREQUENCY
(
MHz
)
AMPLITUDE (dBFS)
-60
-70
-50
-40
-30
-20
-10
0
-80
f
1
109876543211
f
2
f
1
= 4MHz,
f
2
= 4.5MHz
Tx DAC CHANNEL-ID SPECTRAL PLOT
MAX19706 toc26
FREQUENCY (MHz)
AMPLITUDE (dBFS)
1097834562111
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
f
ID
= 2.2MHz
Tx DAC CHANNEL-QD SPECTRAL PLOT
MAX19706 toc27
FREQUENCY (MHz)
AMPLITUDE (dBFS)
-80
-70
-60
-50
-40
-30
-20
-10
0
-90
1097834562111
f
QD
= 2.2MHz
Tx DAC CHANNEL-QD TWO-TONE
SPECTRAL PLOT
MAX19706 toc29
FREQUENCY (MHz)
AMPLITUDE (dBFS)
109784563
-70
-60
-50
-40
-30
-20
-10
0
-80
211
f
1
= 4MHz,
f
2
= 4.5MHz
f
2
f
1
SUPPLY CURRENT
vs. SAMPLING RATE
MAX19706 toc30
SAMPLING RATE (MHz)
SUPPLY CURRENT (mA)
I
VDD
Ext4-Tx MODE
2018468 121410 16
2
4
6
8
10
12
14
16
0
222
Typical Operating Characteristics (continued)
(V
DD
= 3V, OV
DD
= 1.8V, internal reference (1.024V), C
L
≈ 10pF on all digital outputs, f
CLK
= 22MHz (50% duty cycle), Rx ADC input
amplitude = -0.5dBFS, Tx DAC output amplitude = 0dBFS, differential Rx ADC input, differential Tx DAC output, C
REFP
= C
REFN
=
C
COM
= 0.33µF, T
A
= +25°C, unless otherwise noted.)
Rx ADC GAIN ERROR
vs. TEMPERATURE
MAX19706 toc22
TEMPERATURE (
°
C)
GAIN ERROR (%FS)
0.2
1.6
1.0
1.4
1.8
2.0
0
0.4
0.8
1.2
1.6
806535 50-10 5 20-25-40
IA
QA
Tx DAC SPURIOUS-FREE DYNAMIC
RANGE vs. SAMPLING RATE
MAX19706 toc23
SAMPLING RATE (MHz)
SFDR (dBc)
69
73
77
81
85
65
f
OUT
= f
CLK
/ 10
201814 166 8 10 124222