max5858a Maxim Integrated Products, Inc., max5858a Datasheet - Page 19

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

To disable the internal reference of the MAX5858A, con-
nect REN to AV
reference to REFO to set the full-scale output (Figure 5).
For improved accuracy and drift performance, choose a
fixed output voltage reference such as the MAX6520
bandgap reference.
Figure 5. MAX5858A with External Reference
Table 5. PLL Clocking Modes
PLLEN
1
1
1
0
0
0
0
1
F2EN
0
0
1
0
0
1
1
1
DD
MAX6520
Dual, 10-Bit, 300Msps, DAC with 4x/2x/1x
. Apply a temperature-stable, external
______________________________________________________________________________________
F1EN
0
1
1
0
1
1
0
0
REFERENCE
EXTERNAL
AGND
1.24V
AV
DIFFERENTIAL CLOCK
N/A (connect CLXP low
N/A (connect CLXP low
N/A (connect CLXP low
DD
External Reference
and CLXN high)
and CLXN high)
and CLXN high)
f
AGND
FREQUENCY
CLKDIFF
0 to 165
0 to 300
0 to 300
R
SET
REFO
REFR
(MHz)
I
REF
Interpolation Filters and PLL
f
CLKDIFF
FREQUENCY
f
f
f
CLK
CLKDIFF
CLKDIFF
75 to 150
CLOCK
0 to 165
37 to 75
(output)
(output)
REN
REFERENCE
(input)
(input)
(input)
BANDGAP
1.24V
The MAX5858A accepts an input data rate up to
165MHz or the DAC conversion rate of 300MHz. The
input latches on the rising edge of the clock, whereas
the output latches on the following rising edge.
(MHz)
(output)
/2
/4
MAX5858A
AV
Illegal
DD
10µF
f
f
f
2 x f
4 x f
CLKDIFF
CLKDIFF
CLKDIFF
RATE
f
DAC
f
DAC
CLK
CLK
CLK
AGND
INTERPOLATION
0.1µF
SOURCE ARRAY
CURRENT-
1x
2x
4x
1x
2x
4x
Detailed Timing
I
FS
MAX SIGNAL
BANDWIDTH
(MHz)
82
63
31
82
63
31
19