![](http://datasheet.mmic.net.cn/Maxim-Integrated-Products/MAX19713ETN-T_datasheet_101744/MAX19713ETN-T_25.png)
MAX19713
Figure 6. Serial-Interface Timing Diagram
tCSW
tCS
LSB
tCL
tCP
tCH
tDH
tDS
MSB
tCSS
SCLK
DIN
CS/WAKE
10-Bit, 45Msps, Full-Duplex
Analog Front-End
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25
QSPI is a trademark of Motorola, Inc.
Figure 7. Mode-Recovery Timing Diagram
CS/WAKE
SCLK
DIN
16-BIT SERIAL DATA INPUT
AD0–AD9
ID/QD
DAC ANALOG OUTPUT
SETTLES TO 10 LSB ERROR
ADC DIGITAL OUTPUT SINAD
SETTLES TO WITHIN 1dB
tWAKE,SD,ST_ TO Rx MODE OR tENABLE,RX
tWAKE,SD,ST_ TO Tx MODE OR tENABLE,TX
MAX19713 enters the power mode determined by the
WAKEUP-SEL register, however, all other settings (Tx
DAC offset, Tx DAC common-mode voltage, aux-DAC
settings, aux-ADC state) are restored to their values
prior to shutdown.
The only SPI line that is monitored by the MAX19713
during shutdown is
CS/WAKE. Any information transmit-
ted to the MAX19713 concurrent with the
CS/WAKE
wake-up pulse is ignored.
SPI Timing
The serial digital interface is a standard 3-wire connection
(
CS/WAKE, SCLK, DIN) compatible with SPI/QSPI/
MICROWIRE/DSP interfaces. Set
CS/WAKE low to enable
the serial data loading at DIN or output at DOUT.
Following a
CS/WAKE high-to-low transition, data is shift-
ed synchronously, most significant bit first, on the rising
edge of the serial clock (SCLK). After 16 bits are loaded
into the serial input register, data is transferred to the latch
when
CS/WAKE transitions high. CS/WAKE must transi-
tion high for a minimum of 80ns before the next write
sequence. SCLK can idle either high or low between tran-
sitions. Figure 6 shows the detailed timing diagram of the
3-wire serial interface.
Mode-Recovery Timing
Figure 7 shows the mode-recovery timing diagram.
tWAKE is the wake-up time when exiting shutdown, idle,
or standby mode and entering Rx, Tx, or FD mode.
tENABLE is the recovery time when switching between
either Rx or Tx mode. tWAKE or tENABLE is the time for
the Rx ADC to settle within 1dB of specified SINAD per-
formance and Tx DAC settling to 10 LSB error. tWAKE
and tENABLE times are measured after the 16-bit serial
command is latched into the MAX19713 by a
CS/WAKE
transition high. In FAST mode, the recovery time is 0.1s
to switch between Tx or Rx modes.