max5864 Maxim Integrated Products, Inc., max5864 Datasheet - Page 16

• Manufacturer Part Number: max5864
• Description: Max5864 Ultra-low-power, High-dynamic-performance, 22msps Analog Front End
• Manufacturer: Maxim Integrated Products, Inc.

Figure 4
data, and analog outputs. Data for the I channel (ID) is
latched on the falling edge of the clock signal, and Q-
channel (QD) data is latched on the rising edge of the
clock signal. Both I and Q outputs are simultaneously
updated on the next rising edge of the clock signal.
Ultra-Low-Power, High Dynamic-
Performance, 22Msps Analog Front End
Table 2. DAC Output Voltage vs. Input Codes (Internal Reference Mode V
1.024V, External Reference Mode V
Figure 4. DAC System Timing Diagram
16
DIFFERENTIAL OUTPUT VOLTAGE
______________________________________________________________________________________
shows the relationship between the clock, input
−
−
−
V
V
V
V
V
V
V
REFDAC
REFDAC
REFDAC
REFDAC
REFDAC
REFDAC
REFDAC
2.56
2.56
2.56
2.56
2.56
2.56
2.56
DD0–DD9
×
×
×
×
×
×
×
CLK
QD
1023
1023
1023
1023
1023
1021
1023
1023
1023
1023
1021
ID
3
1
1
t
DSQ
Q: N-2
DAC Timing
t
I: N-1
DSI
REFDAC
N-2
N-2
OFFSET BINARY
11 1111 1111
11 1111 1110
10 0000 0001
10 0000 0000
01 1111 1111
00 0000 0001
00 0000 0000
(DD0–DD9)
Q: N-1
= V
t
DHQ
The 3-wire serial interface controls the MAX5864 opera-
tion modes. Upon power-up, the MAX5864 must be
programmed to operate in the desired mode. Use the
3-wire serial interface to program the device for the shut-
down, idle, standby, Rx, Tx, or Xcvr mode. An 8-bit data
register sets the operation modes as shown in
The serial interface remains active in all six modes.
REFIN
I: N
N-1
N-1
t
DHI
)
Q: N
3-Wire Serial Interface and
I: N+1
INPUT DECIMAL CODE
N
N
Operation Modes
1023
1022
513
512
511
REFDAC
1
0
=
Table
3.