User guide

MAX12527
Dual, 65Msps, 12-Bit, IF/Baseband ADC
_______________________________________________________________________________________ 7
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 3.3V, OV
DD
= 2.0V, GND = 0, REFIN = REFOUT (internal reference), C
L
≈ 10pF at digital outputs, V
IN
= -0.5dBFS (differen-
tial), DIFFCLK/SECLK = OV
DD
, PD = GND, SHREF = GND, DIV2 = GND, DIV4 = GND, G/T = GND, f
CLK
= 65MHz, T
A
= -40°C to
+85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
TIMING CHARACTERISTICS (Figure 5)
Clock Pulse-Width High t
CH
7.7 ns
Clock Pulse-Width Low t
CL
7.7 ns
Data-Valid Delay t
DAV
5.4 ns
Data Setup Time Before Rising
Edge of DAV
t
SETUP
(Note 5) 7.0 ns
Data Hold Time After Rising Edge
of DAV
t
HOLD
(Note 5) 7.0 ns
Wake-Up Time from Power-Down
t
WAKE
V
REFIN
= 2.048V 10 ms
Note 1: Specifications ≥+25°C guaranteed by production test, <+25°C guaranteed by design and characterization.
Note 2: Specifications guaranteed by production test for ≥+25°C.
Note 3: Two-tone intermodulation distortion measured with respect to a single-carrier amplitude, and not the peak-to-average input
power of both input tones.
Note 4: During power-down, D0A–D11A, D0B–D11B, DORA, DORB, and DAV are high impedance.
Note 5: Guaranteed by design and characterization.
Typical Operating Characteristics
(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.)
FFT PLOT (16,384-POINT DATA RECORD)
MAX12527 toc01
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dBFS)
30252015105
-100
-80
-60
-40
-20
0
-120
035
f
CLK
= 65MHz
f
IN
= 3.00125MHz
A
IN
= -0.53dBFS
SNR = 71dB
SINAD = 70.9dB
THD = -94dBc
SFDR = 93.6dBc
HD2
HD3
FFT PLOT (32,768-POINT DATA RECORD)
MAX12527 toc02
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dBFS)
302515 20105
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-120
0
f
CLK
= 65.00352MHz
f
IN
= 32.40059MHz
A
IN
= -0.506dBFS
SNR = 70.5dB
SINAD = 70.2dB
THD = -86.9dBc
SFDR = 88.7dBc
HD2
HD3
FFT PLOT (32,768-POINT DATA RECORD)
MAX12527 toc03
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dBFS)
302515 20105
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-120
0
f
CLK
= 65.00352MHz
f
IN
= 70.00852MHz
A
IN
= -0.506dBFS
SNR = 70.1dB
SINAD = 69.8dB
THD = -82.1dBc
SFDR = 82.4dBc
HD2
HD3