Data Sheet
AD5700/AD5700-1
Rev. F | Page 5 of 24
TIMING CHARACTERISTICS
VCC = 1.71 V to 5.5 V, IOVCC = 1.71 V to 5.5 V, TMIN to TMAX, unless otherwise noted.
Table 3.
Limit at TMIN, TMAX
Unit
Description
t1
1
Carrier start time. Time from RTS falling edge to carrier reaching its first peak. See
t2
1
Carrier stop time. Time from RTS rising edge to carrier amplitude dropping below
the minimum receive amplitude.
t3
1
Carrier decay time. Time from RTS rising edge to carrier amplitude dropping to ac
t4
6
Carrier detect on. Time from carrier on to CD rising edge. S
ee Figure 5.t5
6
Carrier detect off. Time from carrier off to CD falling edge. Se
e Figure 6.t6
10
Carrier detect on when switching from transmit mode to receive mode in the
presence of a constant valid carrier. Time from RTS rising edge to CD rising edge.
t7
2.1
ms typ
Crystal oscillator power-up time. On application of a valid power supply voltage at
VCC or on enabling of the oscillator via the XTAL_EN pin. Crystal load capacitors =
16 pF.
t8
6
ms typ
Crystal oscillator power-up time. Crystal load capacitors = 36 pF.
t9
25
s typ
Internal oscillator power-up time. On application of a valid power supply voltage
at VCC or on enabling of the oscillator via the CLK_CFG0 and CLK_CFG1 pins.
t10
10
ms typ
Reference power-up time.
t11
30
s typ
Transition time from power-down mode to normal operating mode (external
clock source, external reference).
1
2
Bit time is the length of time to transfer one bit of data (1 bit time = 1/1200 Hz = 833.333 s).