ad7755 Analog Devices, Inc., ad7755 Datasheet - Page 3

• Manufacturer Part Number: ad7755
• Description: Energy Metering Ic With Pulse Output
• Manufacturer: Analog Devices, Inc.

Parameter
POWER SUPPLY
NOTES
1
2
3
Specifications subject to change without notice.
TIMING CHARACTERISTICS
Parameter
t
t
t
t
t
t
NOTES
1
2
3
4
Specifications subject to change without notice.
See Terminology section for explanation of specifications.
See Plots in Typical Performance Graphs.
Sample tested during initial release and after any redesign or process change that may affect this parameter.
1
2
3
4
5
6
Sample tested during initial release and after any redesign or process change that may affect this parameter.
See Figure 1.
The pulsewidths of F1, F2 and CF are not fixed for higher output frequencies. See Frequency Outputs Section.
The CF pulse is always 18 µs in the high frequency mode. See Frequency Outputs section and Table IV.
3
3, 4
AV
DV
AI
DI
DD
DD
DD
DD
275
See Table III
1/2 t
90
See Table IV
CLKIN/4
A, B Versions
Model
AD7755AAN
AD7755AARS
AD7755ABRS
EVAL-AD7755EB AD7755 Evaluation Board
AD7755AAN-REF AD7755 Reference Design PCB (See AN-559)
2
CF
F1
F2
Unit
ms
sec
sec
ms
sec
sec
Package Description
Plastic DIP
Shrink Small Outline Package
Shrink Small Outline Package
1, 2
t
4
t
1
A Version B Version Unit
4.75
5.25
4.75
5.25
3
2.5
(AV
T
MAX
DD
.t
= –40 C to +85 C)
3
= DV
.t
6
ORDERING GUIDE
DD
Test Conditions/Comments
F1 and F2 Pulsewidth (Logic Low)
Output Pulse Period. See Transfer Function Section
Time Between F1 Falling Edge and F2 Falling Edge
CF Pulsewidth (Logic High)
CF Pulse Period. See Transfer Function Section
Minimum Time Between F1 and F2 Pulse
.t
4.75
5.25
4.75
5.25
3
2.5
= 5 V
5
.t
2
5%, AGND = DGND = 0 V, On-Chip Reference, CLKIN = 3.58 MHz, T
V min
V max
V min
V max
mA max
mA max
Test Conditions/Comments
For Specified Performance
5 V – 5%
5 V + 5%
5 V – 5%
5 V + 5%
Typically 2 mA
Typically 1.5 mA
Package Options
N-24
RS-24
RS-24
AD7755
MIN
to