Freescale Semiconductor
Advance Information
Document Number: MC33976
Rev 4.0, 1/2007
Dual Gauge Driver with
Configurable Response Time
The 33976 is a single-packaged, Serial Peripheral Interface (SPI)
controlled, dual step motor gauge driver integrated circuit (IC). This
monolithic IC consists of four dual output H-Bridge coil drivers and the
associated control logic. Each pair of H-Bridge drivers is used to
automatically control the speed, direction, and magnitude of current
through the two coils of a two-phase instrumentation step motor,
similar to an MMT-licensed AFIC 6405 or Switec MS-X15.xxx motor.
The 33976 is ideal for use in automotive instrumentation systems
requiring distributed and flexible step motor gauge driving. The
device also eases the transition to step motors from air core motors
by emulating the air core pointer movement with little additional
processor bandwidth utilization.
Features
•MMT-Licensed Two-Phase Step Motor Compatible
•Switec MS-X15.xxx Step Motor Compatible
•Minimal Processor Overhead Required
•Fully Integrated Pointer Movement and Position State Machine
with Channel-Independent Configurable Pointer Movement
•4096 Possible Steady State Pointer Positions
•340° Maximum Pointer Sweep
•Maximum Acceleration of 4500°/s
2
•Maximum Pointer Velocity of 400°/s
•Analog Microstepping (12 Steps/Degree of Pointer Movement)
•Pointer Calibration and Return to Zero (RTZ)
•SPI-Controlled 16-Bit Word
•Calibratable Internal Clock
•Low Sleep Mode Current
•Pb-Free Packaging Designated by Suffix Code EG
V
PWR
Device
MC33976DW/R2
33976
CONFIGURABLE DUAL GAUGE DRIVER
DW SUFFIX
EG SUFFIX (PB-FREE)
98ASB42344B
24-PIN SOICW
ORDERING INFORMATION
Temperature
Range (T
A
)
- 40°C to 125°C
MCZ33976EG/R2
Package
24 SOICW
33976
VPWD
5.0 V
Regulator
V
DD
VDD
SIN0+
SIN0-
Motor 0
COS0+
COS0-
RTZ
RST
CS
SCLK
SI
SO
GND
SIN1+
SIN1-
Motor 1
COS1+
COS1-
MCU
Figure 1. 33976 Simplified Application Diagram
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2007. All rights reserved.
INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
VPWR
VDD
INTERNAL
REGULATOR
CS
SCLK
SO
SI
COS0
SPI
SIN0
COS0+
COS0-
SIN0+
SIN0-
COS1+
COS1-
COS1
RST
LOGIC
STATE
MACHINE
UNDER
-
AND
OVERVOLTAGE
DETECT
ILIM
H-BRIDGE
AND
CONTROL
SIN1+
SIN1-
OVERTEMPERATURE
DETECT
SIN1
SIGMA-DELTA
ADC
OSCILLATOR
AGND
VDD
MULTIPLEXER
RTZ
GND (8)
Figure 2. 33976 Simplified Internal Block Diagram
33976
2
Analog Integrated Circuit Device Data
Freescale Semiconductor
PIN CONNECTIONS
PIN CONNECTIONS
COS0+
COS0-
SIN0+
SIN0-
GND
GND
GND
GND
CS
SCLK
SO
SI
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
COS1+
COS1-
SIN1+
SIN1-
GND
GND
GND
GND
V
PWR
RST
VDD
RTZ
Figure 3. 33976 Pin Connections
Table 1. 33976 Pin Definitions
Pin
Number
Pin
Name
(MS Motor Pin #)
1
2
3
4
5 – 8,
17– 20
9
10
11
12
13
14
15
16
COS0+ (MS #4)
COS0− (MS #3)
SIN0+(MS #1)
SIN0− (MS #2)
GND
CS
SCLK
SO
SI
RTZ
VDD
RST
VPWR
(MS Motor Pin #)
21
22
23
24
SIN1− (MS #2)
SIN1+ (MS #1)
COS1− (MS #3)
COS1+ (MS #4)
Ground
Input
Input
Output
Input
Output
Input
Input
Input
Output
Ground
Chip Select
Serial Clock
Serial Output
Serial Input
Multiplexed Output
Voltage
Reset
Battery Voltage
H-Bridge Outputs 1
Pin
Function
Output
Formal Name
H-Bridge Outputs 0
Definition
Each pin is the output pin of a half bridge, designed to source or sink
current.
These pins serve as the ground for the source of the low-side output
transistors as well as the logic portion of the device.
This pin is connected to a chip select output of a LSI IC.
This pin is connected to the SCLK pin of the master device and acts
as a bit clock for the SPI port.
This pin is connected to the SPI Serial Data Input pin of the master
device or to the SI pin of the next device in a daisy chain.
This pin is connected to the SPI Serial Data Output pin of the master
device from which it receives output command data.
This is a multiplexed output pin for the non-driven coil, during a Return
to Zero (RTZ) event.
This SPI and logic power supply input will work with 5.0 V supplies.
This input has an internal active pull-up.
Power supply.
Each of these pins is the output pin of a half bridge, designed to
source or sink current.
33976
Analog Integrated Circuit Device Data
Freescale Semiconductor
3
ELECTRICAL CHARACTERISTICS
MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
MAXIMUM RATINGS
Table 2. Maximum Ratings
All voltages are with respect to ground unless otherwise noted. Exceeding these ratings may cause a malfunction or
permanent damage to the device.
Rating
Power Supply Voltage
Steady State
Input Pin Voltage
(1)
SIN +/- COS +/- Continuous Per Output Current
(2)
Storage Temperature
Operating Junction Temperature
Thermal Resistance
Junction to Ambient
Junction to Lead
ESD Voltage
(3)
Human Body Model
Machine Model
Peak Package Reflow Temperature During Reflow
(4), (5)
V
ESD1
V
ESD2
T
PPRT
±2000
±200
Note 5
°C
R
θJA
R
θJL
60
20
V
V
IN
I
OUTMAX
T
STG
T
J
Symbol
V
PWR(SUS)
-0.3 to 41
-0.3 to 7.0
40
-55 to 150
-40 to 150
V
mA
°C
°C
°C/W
Value
Unit
V
Notes
1. Exceeding voltage limits on Input pins may cause permanent damage to the device.
2. Output continuous output rating so long as maximum junction temperature is not exceeded. Operation at 125°C ambient temperature will
require maximum output current computation using package thermal resistances.
3. ESD1 testing is performed in accordance with the Human Body Model (C
ZAP
= 100 pF, R
ZAP
= 1500
Ω),
ESD2 testing is performed in
accordance with the Machine Model (C
ZAP
= 200 pF, R
ZAP
= 0
Ω).
4.
5.
Pin soldering temperature limit is for 10 seconds maximum duration. Not designed for immersion soldering. Exceeding these limits may
cause malfunction or permanent damage to the device.
Freescale’s Package Reflow capability meets Pb-free requirements for JEDEC standard J-STD-020C. For Peak Package Reflow
Temperature and Moisture Sensitivity Levels (MSL),
Go to www.freescale.com, search by part number [e.g. remove prefixes/suffixes and enter the core ID to view all orderable parts. (i.e.
MC33xxxD enter 33xxx), and review parametrics.
33976
4
Analog Integrated Circuit Device Data
Freescale Semiconductor
ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 3. Static Electrical Characteristics
Characteristics noted under conditions 4.75 V
≤
V
DD
≤
5.25 V, - 40°C
≤
T
J
≤
150°C, GND = 0 V unless otherwise noted.
Typical values noted reflect the approximate parameter means at T
A
= 25°C under nominal conditions unless otherwise noted.
Characteristic
POWER INPUT
Supply Voltage Range
Fully Operational
Limited Operational
(6), (7)
V
PWR
Supply Current
Gauge 1 and 2 Outputs ON, No Output Loads
V
PWR
Supply Current (All Outputs Disabled)
Reset = Logic [0], V
DD
= 5.0 V
Reset = Logic [0], V
DD
= 0 V
Overvoltage Detection Level
(8)
Undervoltage Detection Level
(9)
Logic Supply Voltage Range (5.0 V Nominal Supply)
Under V
DD
Logic Reset
V
DD
Supply Current
Sleep: Reset Logic [0]
Outputs Enabled
POWER OUTPUTS
Microstep Output (Measured Across Coil Outputs)
SIN0,1, ± (COS0,1, ±) (refer to
Table 1)
R
OUT
= 200
Ω,
PE6 = 0
Steps 6, 18 (0, 12)
Steps 5, 7, 17, 19 (1, 11, 13, 23)
Steps 4, 8, 16, 20 (2, 10, 14, 22)
Steps 3, 9, 15, 21 (3, 9, 15, 21)
Steps 2, 10, 14, 22 (4, 8,16, 20)
Steps 1, 11, 13, 23 (5, 7, 17, 19)
Steps 0, 12 (6, 18)
V
ST6
V
ST5
V
ST4
V
ST3
V
ST2
V
ST1
V
ST0
4.82
0.94 V
ST6
0.84 V
ST6
0.68 V
ST6
0.47 V
ST6
0.23 V
ST
6
-0.1
5.3
0.97 V
ST6
0.87 V
ST6
0.71 V
ST6
0.50 V
ST6
0.26 V
ST6
0
6.0
1.0 V
ST6
0.96 V
ST6
0.8 V
ST6
0.57 V
ST6
0.31 V
ST6
0.1
V
I
DD(OFF)
I
DD(ON)
–
–
40
1.0
65
1.8
µA
mA
I
PWSLP1
I
PWRSLP2
V
PWROV
V
PWRUV
V
DD
V
DDUV
–
–
26
5.0
4.5
–
42
15
32
5.6
5.0
–
60
25
38
6.2
5.5
4.5
V
V
V
V
I
PWR(ON)
–
4.0
6.0
µA
V
PWR
6.5
4.0
–
–
26
26
mA
V
Symbol
Min
Typ
Max
Unit
Notes
6. Outputs and logic remain active; however, the larger coil voltage levels may be clipped. The reduction in drive voltage may result in a
loss of position control.
7. The logic will reset at some level below the specified Limited Operational minimum.
8. Outputs will disable and must be re-enabled via the PECCR command.
9. Outputs remain active; however, the reduction in drive voltage may result in a loss of position control.
33976
Analog Integrated Circuit Device Data
Freescale Semiconductor
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