max5858a Maxim Integrated Products, Inc., max5858a Datasheet - Page 16

• Manufacturer Part Number: max5858a
• Description: Max5858a Dual, 10-bit, 300msps, Dac With 4x/2x/1x Interpolation Filters And Pll
• Manufacturer: Maxim Integrated Products, Inc.

Dual, 10-Bit, 300Msps, DAC with 4x/2x/1x
Interpolation Filters and PLL
Figure 2. Typical Application Circuit
Table 4. Benefits of Interpolation
16
OPTION
______________________________________________________________________________________
1
2
3
DIGITAL BASEBAND
OFDM PROCESSOR
QAM-MAPPER
• No interpolation
• 2.6x oversample
• f
• No interpolation
• 8x oversample
• f
• Push image to f
• 4x interpolation
• f
• Passband attenuation = 0.1dB
• Push image to 256MHz
DAC
DAC
DAC
DATA CLOCK OUT
f
DATA
= f
= f
= 286.4MHz, f
SINGLE 10-BIT BUS
DATA
DATA
SAVES I/O PINS
= 71.6MHz
SOLUTION
= 78MHz
= 240MHz
IMAGE
DATA
= 210MHz
= 71.6MHz
INTERLEAVE
LATCH
DATA
• Low data rate
• Low clock rate
• Lower order filter
• Filter gain/phase match
• Low data rate
• Low order filter
• 60dB image attenuate
• Filter gain/phase match
10-BIT BUS
10-BIT BUS
LATCH
LATCH
DATA
DATA
ADVANTAGE
SINGLE SUPPLY
2.7V TO 3.3V
CLOCK SOURCE
f
DAC
INTERPOLATING
INTERPOLATING
= 286.4MHz
FILTERS
FILTERS
4x/2x
4x/2x
DIV-4
DIV-2
DIV-1
10
10
• High order filter
• Filter gain/phase match
• High clock rate
• High data rate
• None
CHA
DAC
CHB
DAC
MAX5858A
DISADVANTAGE
ENTIRE SUPPLY RANGE
MAINTAINED OVER
FS ANALOG OUT
2.7V TO 3.3V
AOUT
BOUT