AD7755 Ver la hoja de datos (PDF) - Analog Devices
Número de pieza
componentes Descripción
Fabricante
AD7755 Datasheet PDF : 16 Pages
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Parameter
A Version B Version Unit
Test Conditions/Comments
POWER SUPPLY
AVDD
DVDD
AIDD
DIDD
4.75
4.75
V min
5.25
5.25
V max
4.75
4.75
V min
5.25
5.25
V max
3
3
mA max
2.5
2.5
mA max
For Specified Performance
5 V – 5%
5 V + 5%
5 V – 5%
5 V + 5%
Typically 2 mA
Typically 1.5 mA
NOTES
1See Terminology section for explanation of specifications.
2See Plots in Typical Performance Graphs.
3Sample tested during initial release and after any redesign or process change that may affect this parameter.
Specifications subject to change without notice.
AD7755
TIMING CHARACTERISTICS1, 2 (AVDD = DVDD = 5 V ؎ 5%, AGND = DGND = 0 V, On-Chip Reference, CLKIN = 3.58 MHz, TMIN to
TMAX = –40؇C to +85؇C)
Parameter A, B Versions Unit
Test Conditions/Comments
t13
275
ms
F1 and F2 Pulsewidth (Logic Low)
t2
See Table III
sec
Output Pulse Period. See Transfer Function Section
t3
t43, 4
1/2 t2
90
sec
Time Between F1 Falling Edge and F2 Falling Edge
ms
CF Pulsewidth (Logic High)
t5
See Table IV
sec
CF Pulse Period. See Transfer Function Section
t6
CLKIN/4
sec
Minimum Time Between F1 and F2 Pulse
NOTES
1Sample tested during initial release and after any redesign or process change that may affect this parameter.
2See Figure 1.
3The pulsewidths of F1, F2 and CF are not fixed for higher output frequencies. See Frequency Outputs Section.
4The CF pulse is always 18 µs in the high frequency mode. See Frequency Outputs section and Table IV.
Specifications subject to change without notice.
t1
F1
.t6
.t2
F2
.t3
t4
.t5
CF
Figure 1. Timing Diagram for Frequency Outputs
ORDERING GUIDE
Model
Package Description
AD7755AAN
AD7755AARS
AD7755ABRS
EVAL-AD7755EB
AD7755AAN-REF
Plastic DIP
Shrink Small Outline Package
Shrink Small Outline Package
AD7755 Evaluation Board
AD7755 Reference Design PCB (See AN-559)
Package Options
N-24
RS-24
RS-24
REV. B
–3–
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