MAX5858ECM+TD Maxim Integrated Products, MAX5858ECM+TD Datasheet - Page 13

• Manufacturer Part Number: MAX5858ECM+TD
• Description: IC DAC 10BIT DUAL 300MSPS 48TQFP
• Manufacturer: Maxim Integrated Products

Specifications of MAX5858ECM+TD

• Settling Time: 11ns
• Number Of Bits: 10
• Data Interface: Parallel
• Number Of Converters: 2
• Voltage Supply Source: Single Supply
• Power Dissipation (max): 816mW
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-TQFP Exposed Pad, 48-eTQFP, 48-HTQFP, 48-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The MAX5858 dual, high-speed, 10-bit, current-output
DAC provides superior performance in communication
systems requiring low-distortion analog-signal recon-
struction. The MAX5858 combines two DACs with 2x/4x
programmable digital interpolation filters, divide-by-N
clock output, and an on-chip 1.24V reference. The cur-
rent outputs of the DACs can be configured for differen-
tial or single-ended operation. The full-scale output
current range is adjustable from 2mA to 20mA to opti-
mize power dissipation and gain control.
The MAX5858 accepts an input data rate to 165MHz or
a DAC conversion rate of 300MHz. The inputs are
latched on the rising edge of the clock whereas the out-
put latches on the following rising edge.
The two-stage digital interpolation filters are program-
mable to 4x, 2x, or no interpolation. When operating in
4x interpolation mode, the interpolator increases the
DAC conversion by a factor of four, providing a four-
Dual, 10-Bit, 300Msps, Current-Output DAC with
______________________________________________________________________________________
DA9–DA0
DB9–DB0
CW
IDE
Detailed Description
DV
DD
10
10
DGND
CONTROL REGISTER
CV
REGISTER
REGISTER
DD
INPUT
INPUT
AV
DD
10
10
F1EN
CGND
4x/2x/1x Interpolation Filters
INTERPOLATION
INTERPOLATION
2x DIGITAL
2x DIGITAL
FILTER
FILTER
MAX5858
1.24V REFERENCE AND CONTROL AMPLIFIER
10
10
F2EN
REFO
fold increase in separation between the reconstructed
waveform spectrum and its first image.
The MAX5858 features three modes of operation: normal,
standby, and power-down. These modes allow efficient
power management. In power-down, the MAX5858 con-
sumes only 1µA of supply current. Wake-up time from
standby mode to normal DAC operation is 0.7µs.
An 8-bit control word routed through channel A’s data
port programs the gain matching, interpolator configu-
ration, and operational mode of the MAX5858. The con-
trol word is latched on the falling edge of CW. Table 1
represents the control word format and function.
The gain on channel A can be adjusted to achieve gain
matching between two channels in a user’s system.
The gain on channel A can be adjusted from -0.4dB to
0.35dB in steps of 0.05dB by using bits G3 to G0 (see
Table 3).
INTERPOLATION
INTERPOLATION
2x DIGITAL
2x DIGITAL
FILTER
FILTER
CLKXP
REN
CLKXN
10
10
REFR
Simplified Block Diagram
CLK
300MHz
300MHz
10-BIT
10-BIT
DAC
DAC
R
SET
AGND
Programming the DAC
OUTPA
OUTNA
OUTPB
OUTNB
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