PixArt Imaging Inc.
ADNS-7550 Integrated Molded Lead-Frame DIP Sensor
AC Electrical Specifications
Electrical Characteristics over recommended operating conditions. (Typical values at 25 °C, VDD=5.0V, VDDIO= 2.8V)
Parameter
Symbol
Minimum Typical Maximum Units Notes
Motion delay
after reset
tMOT-RST
23
ms
From SW_RESET register write to valid motion,
assuming motion is present
Shutdown
tSTDWN
50
ms
ms
From Shutdown mode active to low current
Wake from
shutdown
tWAKEUP
23
From Shutdown mode inactive to valid motion.
Notes: A RESET must be asserted after a shutdown.
Refer to section “Notes on Shutdown also note
tMOT-RST
MISO rise time
MISO fall time
tr-MISO
150
150
300
300
120
ns
ns
ns
CL = 100pF
CL = 100pF
tf-MISO
MISO delay
after SCLK
tDLY-MISO
From SCLK falling edge to MISO data valid, no load
conditions
MISO hold time
MOSI hold time
MOSI setup time
thold-MISO 0.5
thold-MOSI 200
tsetup-MOSI 120
1/fSCLK
us
ns
ns
μs
Data held until next falling SCLK edge
Amount of time data is valid after SCLK rising edge
From data valid to SCLK rising edge
SPI time between
write commands
tSWW
30
From rising SCLK for last bit of the first data byte, to
rising SCLK for last bit of the second data byte.
SPI time between
write and read
commands
tSWR
20
μs
ns
From rising SCLK for last bit of the first data byte, to
rising SCLK for last bit of the second address byte.
SPI time between
read and subsequent
commands
tSRW
tSRR
500
From rising SCLK for last bit of the first data byte, to
falling SCLK for the first bit of the address byte of
the next command.
SPI read address
-data delay
tSRAD
tBEXIT
4
μs
ns
From rising SCLK for last bit of the address byte, to
falling SCLK for first bit of data being read.
NCS inactive after
motion burst
500
Minimum NCS inactive time after motion burst
before next SPI usage
NCS to SCLK active
tNCS-SCLK
tSCLK-NCS
120
120
ns
ns
From NCS falling edge to first SCLK rising edge
SCLK to NCS inactive
(for read operation)
From last SCLK rising edge to NCS rising edge, for
valid MISO data transfer
SCLK to NCS inactive
(for write operation)
tSCLK-NCS
20
us
From last SCLK rising edge to NCS rising edge, for
valid MOSI data transfer
NCS to MISO high-Z
MOTION rise time
MOTION fall time
tNCS-MISO
tr-MOTION
tf-MOTION
IDDT
500
300
300
45
ns
From NCS rising edge to MISO high-Z state
150
150
ns
CL = 100pF
CL = 100pF
ns
Transient Supply
Current
mA
Max supply current during a VDD ramp from 0 to
2.8V
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PixArt Imaging Inc.
E-mail: fae_service@pixart.com.tw
12
PIXART [ PIXART IMAGING INC. ]
