Maxim MAX12557 TV Converter Box User Manual


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MAX12557
Dual, 65Msps, 14-Bit, IF/Baseband ADC
10 ______________________________________________________________________________________
60
65
75
70
80
85
3.0 3.23.1 3.3 3.4 3.5 3.6
-THD, SFDR vs. ANALOG SUPPLY VOLTAGE
(f
CLK
= 65.00352MHz, f
IN
= 175MHz)
MAX12557 toc22
V
DD
(V)
-THD, SFDR (dBc)
SFDR
-THD
60
64
72
68
76
80
1.5 2.11.8 2.4 2.7 3.0 3.3
SNR, SINAD vs. DIGITAL SUPPLY VOLTAGE
(f
CLK
= 65.00352MHz, f
IN
= 70MHz)
MAX12557 toc23
OV
DD
(V)
SNR, SINAD (dB)
SNR
SINAD
3.6
60
70
65
80
75
90
85
95
1.5 2.1 2.41.8 2.7 3.0 3.3 3.6
MAX12557 toc24
OV
DD
(V)
-THD, SFDR (dBc)
-THD, SFDR vs. DIGITAL SUPPLY VOLTAGE
(f
CLK
= 65.00352MHz, f
IN
= 70MHz)
SFDR
-THD
60
63
69
66
72
75
1.5 2.11.8 2.4 2.7 3.0 3.3
SNR, SINAD vs. DIGITAL SUPPLY VOLTAGE
(f
CLK
= 65.00352MHz, f
IN
= 175MHz)
MAX12557 toc25
OV
DD
(V)
SNR, SINAD (dB)
SNR
SINAD
3.6
60
64
72
68
76
80
1.5 2.11.8 2.4 2.7 3.0 3.3
-THD, SFDR vs. DIGITAL SUPPLY VOLTAGE
(f
CLK
= 65.00352MHz, f
IN
= 175MHz)
MAX12557 toc26
OV
DD
(V)
-THD, SFDR (dBc)
SFDR
-THD
3.6
0
200
100
500
400
300
800
700
600
900
3.0 3.23.1 3.3 3.4 3.5 3.6
P
DISS
, I
VDD
(ANALOG) vs. ANALOG SUPPLY VOLTAGE
(f
CLK
= 65.00352MHz, f
IN
= 175MHz)
MAX12557 toc27
V
DD
(V)
P
DISS
, I
VDD
(mW, mA)
P
DISS
(ANALOG)
I
VDD
0
20
10
40
30
70
60
50
80
1.5 2.11.8 2.4 2.7 3.0 3.3 3.6
MAX12557 toc28
OV
DD
(V)
P
DISS
, I
OVDD
(DIGITAL)
vs. DIGITAL SUPPLY VOLTAGE
(f
CLK
= 65.00352MHz, f
IN
= 175MHz)
P
DISS
, I
OVDD
(mW, mA)
P
DISS
(DIGITAL)
C
L
≈ 5pF
I
OVDD
60
64
62
68
66
70
72
25 4535 55 65 75
SNR, SINAD vs. CLOCK DUTY CYCLE
(f
IN
= 70MHz, A
IN
= -0.5dBFS)
MAX12557 toc29
CLOCK DUTY CYCLE (%)
SNR, SINAD (dB)
SINGLE-ENDED CLOCK DRIVE
SNR
SINAD
60
70
65
80
75
85
90
25 4535 55 65 75
-THD, SFDR vs. CLOCK DUTY CYCLE
(f
IN
= 70MHz, A
IN
= -0.5dBFS)
MAX12557 toc30
CLOCK DUTY CYCLE (%)
-THD, SFDR (dBc)
SINGLE-ENDED CLOCK DRIVE
SFDR
-THD
Typical Operating Characteristics (continued)
(V
DD
= 3.3V, OV
DD
= 2.0V, GND = 0, REFIN = REFOUT (internal reference mode), C
L
≈ 5pF at digital outputs, V
IN
= -0.5dBFS,
DIFFCLK/SECLK = OV
DD
, PD = GND, G/T = GND, f
CLK
= 65MHz (50% duty cycle), T
A
= +25°C, unless otherwise noted.)
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