Datasheet

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ELECTRICAL CHARACTERISTICS (AC SPECIFICATIONS)
(1)
DAC5687
SLWS164E – FEBRUARY 2005 – REVISED SEPTEMBER 2006
over recommended operating free-air temperature range, AVDD = 3.3 V, CLKVDD = 3.3 V, PLLVDD = 0 V (= 3.3 V for PLL
clock mode), IOVDD = 3.3 V, DVDD = 1.8 V, IOUT
FS
= 19.2 mA, external clock mode, 4:1 transformer output termination,
50- Ω doubly terminated load (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
ANALOG OUTPUT
f
CLK
Maximum output update rate 500 MSPS
t
s(DAC)
Output settling time to 0.1% Transition: Code 0x0000 to 0xFFFF 10.4 ns
t
pd
Output propagation delay 3 ns
t
r(IOUT)
Output rise time 10% to 90% 2 ns
t
f(IOUT)
Output fall time 90% to 10% 2 ns
AC PERFORMANCE
X2, PLL off, CLK2 = 250 MHz, DAC A and DAC B on,
78
IF = 5.1 MHz, first Nyquist zone < f
DATA
/2
X4, PLL off, CLK2 = 500 MHz, DAC A and DAC B on,
77
SFDR Spurious free dynamic range
(2)
IF = 5.1 MHz, first Nyquist zone < f
DATA
/2 dBc
X4, CLK2 = 500 MHz, DAC A and DAC B on,
IF = 20.1 MHz, PLL on for MIN, PLL off for TYP, 68
(3)
76
first Nyquist zone < f
DATA
/2
X4, PLL off, CLK2 = 500 MSPS, DAC A and DAC B on,
73
single tone, 0 dBFS, IF = 20.1 MHz
X4 CMIX, PLL off, CLK2 = 500 MSPS, DAC A and DAC B
65
on, IF = 70.1 MHz
X4 CMIX, PLL off, CLK2 = 500 MSPS, DAC A and DAC B
57
SNR Signal-to-noise ratio on, single tone, 0 dBFS, IF = 150.1 MHz dBc
X4 FMIX CMIX, PLL off, CLK2 = 500 MSPS, DAC A and
54
DAC B on, single tone, 0 dBFS, IF = 180.1 MHz
X4, PLL off, CLK2 = 500 MSPS, DAC A and DAC B on,
four tones, each – 12 dBFS, IF = 24.7, 24.9, 25.1, 25.3 73
MHz
X4, PLL off, CLK2 = 500 MSPS, DAC A and DAC B on,
79
IF = 20.1 and 21.1 MHz
X4 CMIX, PLL off, CLK2 = 500 MSPS, DAC A and DAC B
73
Third-order two-tone
on, IF = 70.1 and 71.1 MHz
IMD3 intermodulation (each tone at dBc
X4 CMIX, PLL off, CLK2 = 500 MSPS, DAC A and DAC B
– 6 dBFS)
68
on, IF= 150.1 and 151.1 MHz
X4 FMIX CMIX, PLL off, CLK2 = 500 MSPS, DAC A and
67
DAC B on, IF = 180.1 and 181.1 MHz
Four-tone intermodulation to
X4 CMIX, CLK2 = 500 MHz, f
OUT
= 149.2, 149.6, 150.4,
IMD Nyquist (each tone at – 12 66 dBc
and 150.8 MHz
dBFS)
(1) Measured single ended into 50- Ω load.
(2) See the Non-Harmonic Clock Related Spurious Signals section for information on spurious products out of band (< f
DATA
/2).
(3) 1:1 transformer output termination.
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