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PDF 33793 Data sheet ( Hoja de datos )
| Número de pieza | 33793 | |
| Descripción | Distributed System Interface (DSI) Sensor Interface | |
| Fabricantes | Motorola Inc | |
| Logotipo |  |
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Freescale Semiconductor, Inc.
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Document order number: MC33793/D
Rev 10, 07/2003
Distributed System Interface (DSI)
Sensor Interface
The 33793 is a slave Distributed System Interface (DSI) device that is
optimized as a sensor interface. The device contains circuits to power sensors
such as accelerometers and to digitize the analog level from the sensor. The
device is controlled by commands over the DSI bus and returns measured
data over the bus.
Features
• 4-Channel, 8-Bit Analog-to-Digital Converter (ADC)
• 4 Pins Configurable as Analog or Logic Inputs or as Logic Outputs
• Provides Regulated +5.0 V Output for Sensor Power from Bus
• Additional High-Drive Logic Output
• Undervoltage Fault Detection and Signaling
• On-Board Clock (No External Elements Required)
• Field-Programmable Address
• Default and Field-Programmable as a DSI Daisy Chain Device
• Recognizes Reverse Initialization for Open Bus Fault Tolerance
• Detects Short to Battery on Bus Switch and Prevents Its Closure
33793
DISTRIBUTED SYSTEM
INTERFACE (DSI) SENSOR
INTERFACE
D SUFFIX
16-LEAD SOICN
CASE 751B
ORDERING INFORMATION
Device
Temperature
Range (TJ)
Package
MC33793D/R2 -40°C to 150°C
16 SOICN
33790
DSIO
33793 Simplified Application Diagram
33793
BUSRTN BUSOUT
I/O0
AGND
NC
BUSIN
I/O1 NC
AGND
H_CAP
I/O3 REGOUT
NC NC
I/O2 LOGOUT
BUSRTN
33793
BUSIN
BUSOUT
To Other
DSI Slaves
1.0µF
4.7µF
1.0 K
YX
VCC
TEST
XY
ERROR ACCELEROMETER
GND
LED
© Motorola, Inc. 2003
For More Information On This Product,
Go to: www.freescale.com
1 page  
Freescale Semiconductor, Inc.
STATIC ELECTRICAL CHARACTERISTICS
Characteristics noted under conditions -0.3 V ≤ VBUSIN or VBUSOUT ≤ 30 V, 5.5 V < VH_CAP < 30 V, -40°C < TJ < 150°C.
Parameter
Symbol
Min
Nom
Max
Internal Quiescent Current Drain
VH_CAP = 25 V, Logout = 0, I/O = Input
IQ
–
– 3.0
BUSIN or BUSOUT to H_CAP Rectifier Voltage Drop
IBUSIN or IBUSOUT = 15 mA
IBUSIN or IBUSOUT = 100 mA
VRECT
–
–
0.75 1.00
0.9 1.2
BUSIN + BUSOUT Bias Current
VBUSIN or VBUSOUT = 8.0 V, VH_CAP = 9.0 V
VBUSIN or VBUSOUT = 0.5 V, VH_CAP = 25 V
IBIAS
-100 – 100
– – 20
Rectifier Leakage Current
VBUSIN or VBUSOUT = 5.0 V, VH_CAP = 25 V
IRLKG
-20 – 100
Reg0ut
5.5 V > VH_CAP > 25 V, IRO = 12 mA
VREG
4.75 5.0 5.25
RegOut Line Regulation
IRO = 12 mA, 5.5 V > VH_CAP > 25 V
VRLINE
–
71 180
RegOut Load Regulation
IRO = 0 to 12 mA, 5.5 V > VH_CAP > 25 V
VRLD
–
2.3 100
Undervoltage Lockout
Proportional to unloaded VREGOUT
VUVL
0.93
0.95
0.97
Bus Switch Resistance
VBI = 8.0 V, IBO = -80 mA (Bus Switch Active)
RSW
–
4.0 8.0
I/O0 and I/O3 Pull-Down Current
0 < VBUSIN or VBUSOUT < 1.0 V
IPD
7.0 11 13
I/O1 and I/O2 Pull-Up Current
VRO < VBUSIN or VBUSOUT < VRO - 1.0 V
IPU
-7.0 -11 -13
BUSIN and BUSOUT Logic Thresholds
Low
High
VTHL
2.8
3.0
3.2
VTHH
5.5
6.0
6.5
Logic Duty Cycle (assured by design)
Logic 0
Logic 1
DCL 10 33 40
DCH
60
67
90
BUSIN + BUSOUT Response Current
VBUSIN and/or VBUSOUT = 4.0 V
IRSP
9.9
11 12.1
ADC Code Conversion Error (INL)
ADCINL
–
– < 1.0
ADC Full-scale Error
ADCFS
–
–
3
I/O Logic Input Thresholds
Logic High
Logic Low
VIH 0.7
VIL –
0.54
0.51
–
0.3
Units
mA
V
µA
µA
V
mV
mV
VRO
Ω
µA
µA
V
%
mA
LSB
counts
VRO
MOTOROLA ANALOG INTEGRATED CIRFCoUrITMDEoVrIeCEIDnAfoTArmation On This Product,
Go to: www.freescale.com
33793
5
5 Page 
Freescale Semiconductor, Inc.
Programmable address devices all power up with a device
address of $0 in their address register and their bus switches
open. In the daisy chain, if the first device receives the
initialization command device on BUSIN, it will accept the
address in the command and close its switch at the end of the
command. The next device in the chain will now be able to
receive the initialization command on its BUSIN and will accept
the next address. This proceeds down the chain until the last
device is addressed. The devices can also be initialized by the
reverse initialization command if the signal is applied to
BUSOUT.
Pre-programmed devices power up with their pre-
programmed address in its address register. It will ignore all
Initialization commands unless the address in the command
matches its pre-programmed address. In this event the device
stores the other information contained in the Initialization
command.
MOTOROLA ANALOG INTEGRATED CIRFCoUrITMDEoVrIeCEIDnAfoTArmation On This Product,
Go to: www.freescale.com
33793
11
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet 33793.PDF ] | |
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