Datasheet

MAX5895
16-Bit, 500Msps Interpolating and Modulating
Dual DAC with CMOS Inputs
_______________________________________________________________________________________ 9
NOISE DENSITY vs. DAC UPDATE RATE
f
OUT
= 16MHz, 10MHz OFFSET
MAX5895 toc19
f
DAC
(MHz)
NOISE DENSITY (dBFS/Hz)
400300200
-170
-160
-150
-140
-130
-120
-110
-100
-180
100 500
2x, 4x, AND 8x INTERPOLATION
A
OUT
= -12dBFS
WCDMA ACLR vs. OUTPUT FREQUENCY
f
DATA
= 122.88MWps, 4x INTERPOLATION
MAX5895 toc20
f
CENTER
(MHz)
ACLR (dB)
1208040
50
60
70
80
90
100
40
0160
SINGLE-CARRIER
ALTERNATE CHANNEL
SINGLE-CARRIER
ADJACENT CHANNEL
FOUR-CARRIER
ALTERNATE CHANNEL
FOUR-CARRIER
ADJACENT CHANNEL
WCDMA ACLR vs. OUTPUT FREQUENCY
f
DATA
= 76.8MWps, 4x INTERPOLATION
MAX5895 toc21
f
CENTER
(MHz)
ACLR (dB)
8040
50
60
70
80
90
100
40
0
SINGLE-CARRIER
ALTERNATE CHANNEL
SINGLE-CARRIER
ADJACENT CHANNEL
FOUR-CARRIER
ALTERNATE CHANNEL
FOUR-CARRIER
ADJACENT CHANNEL
MAX5895 toc22
-110
-100
-90
-80
-70
-60
-50
OUTPUT POWER (dBm)
-40
-30
-20
-120
WCDMA ACLR SPECTRAL PLOT
f
DATA
= 61.44MWps, 8x INTERPOLATION
f
CENTER
= 61.44MHz, SPAN = 25.5MHz
ACLR2 = 77dB ACLR1 = 76dB CARRIER = -11dBm ACLR1 = 75dB ACLR2 = 76dB
FOUR-CARRIER WCDMA ACLR SPECTRAL PLO
f
DATA
= 61.44MWps, 8x INTERPOLATION
MAX5895 toc23
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-120
OUTPUT POWER (dBm)
f
CENTER
= 61.44MHz, SPAN = 40.6MHz
ACLR2 = 74dB ACLR1 = 73dB CARRIER = -17dBm ACLR1 = 72dB ACLR2 = 72dB
WCDMA ACLR SPECTRAL PLOT
f
DATA
= 122.88MWps, 4x INTERPOLATION
MAX5895 toc24
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-120
OUTPUT POWER (dBm)
f
CENTER
= 122.88MHz, SPAN = 25.5MHz
ACLR2 = 73dB ACLR1 = 71dB CARRIER = -14dBm ACLR1 = 70dB ACLR2 = 72dB
FOUR-CARRIER WCDMA ACLR SPECTRAL PLOT
f
DATA
= 122.88MWps, 4x INTERPOLATION
MAX5895 toc25
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-120
OUTPUT POWER (dBm)
f
CENTER
= 122.88MHz, SPAN = 40.6MHz
ACLR2 = 67dB ACLR1 = 66dB CARRIER = -20dBm ACLR1 = 66dB ACLR2 = 67dB
Typical Operating Characteristics (continued)
(DV
DD1.8
= AV
DD1.8
= 1.8V, AV
CLK
= AV
DD3.3
= DV
DD3.3
= 3.3V, modulator off, 2x interpolation, output is transformer-coupled to
50Ω load, T
A
= +25°C, unless otherwise noted.)