3D7220 Datasheet, PDF (3/4 Pages) Data Delay Devices, Inc. – MONOLITHIC 10-TAP FIXED DELAY LINE (SERIES 3D7220)

3D7220
APPLICATION NOTES (CONT’D)
custom reference designator identifying the
intended frequency and duty cycle of operation.
The programmed delay accuracy of the device is
guaranteed, therefore, only for the user specified
input characteristics. Small input pulse width
variation about the selected pulse width will only
marginally impact the programmed delay
accuracy, if at all. Nevertheless, it is strongly
recommended that the engineering staff at DATA
DELAY DEVICES be consulted.
POWER SUPPLY AND
TEMPERATURE CONSIDERATIONS
The delay of CMOS integrated circuits is strongly
dependent on power supply and temperature.
The monolithic 3D7220 programmable delay line
utilizes novel and innovative compensation
circuitry to minimize the delay variations induced
by fluctuations in power supply and/or
temperature.
The thermal coefficient is reduced to 250 PPM/C,
which is equivalent to a variation, over the -40C
to 85C operating range, of ±2% from the room-
temperature delay settings and/or 1.0ns,
whichever is greater. The power supply
coefficient is reduced, over the 4.75V-5.25V
operating range, to ±1% of the delay settings at
the nominal 5.0VDC power supply and/or 1.0ns,
whichever is greater. It is essential that the
power supply pin be adequately bypassed
and filtered. In addition, the power bus
should be of as low an impedance
construction as possible. Power planes are
preferred.
DEVICE SPECIFICATIONS
TABLE 2: ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL MIN
MAX UNITS NOTES
DC Supply Voltage
V_DD
-0.3
7.0
V
Input Pin Voltage
V_IN
-0.3
V_DD+0.3
V
Input Pin Current
I_IN
-1.0
1.0
mA
25C
Storage Temperature
T_STRG
-55
150
C
Lead Temperature
T_LEAD
300
C
10 sec
TABLE 3: DC ELECTRICAL CHARACTERISTICS
(-40C to 85C, 4.75V to 5.25V)
PARAMETER
SYMBOL MIN
Static Supply Current*
I_DD
High Level Input Voltage
V_IH
2.0
Low Level Input Voltage
V_IL
High Level Input Current
I_IH
Low Level Input Current
I_IL
High Level Output
I_OH
Current
Low Level Output Current
I_OL
4.0
Output Rise & Fall Time
T_R & T_F
TYP
3.5
-35.0
15.0
2.0
MAX
5.5
0.8
1.0
1.0
-4.0
2.5
UNITS
mA
V
V
µA
µA
mA
mA
ns
NOTES
V_IH = V_DD
V_IL = 0V
V_DD = 4.75V
V_OH = 2.4V
V_DD = 4.75V
V_OL = 0.4V
C_LD = 5 pf
*I_DD(Dynamic) = 10 * C_LD * V_DD * F
where: C_LD = Average capacitance load/tap (pf)
F = Input frequency (GHz)
Input Capacitance = 10 pf typical
Output Load Capacitance (C_LD) = 25 pf max
Doc #03004
DATA DELAY DEVICES, INC.
3
4/15/05
3 Mt. Prospect Ave. Clifton, NJ 07013