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参数资料
| 型号： | 8980 |
| 厂商： | Allegro MicroSystems, Inc. |
| 英文描述： | SUPERSERVO SPINDLE & VOICE-COIL ACTUATION MANAGER/DRIVER |
| 中文描述： | SUPERSERVO主轴 |
| 文件页数： | 5/8页 |
| 文件大小： | 81K |
| 代理商： | 8980 |
8980
S
UPER
S
ERVO
SPINDLE & VOICE-COIL
ACTUATION MANAGER/DRIVER
V
BOOST(L)
Internally generated intermediate voltage for driving the gates of all sink-side power output
transistors, the bandgap reference, and fault monitors. This source is regulated and requires
a compensation capacitor from this terminal to ground.
V
PF(GATE)
Control voltage provided to drive the gate of an optional external enhancement-mode power
FET, augmenting the internal blocking FET between V
CC(PWR)
and
V
M
.
V
REF
Programmable reference voltage output. This reference tracks V
REF(x2)
and may be used as a
relative signal ground.
V
REF(x2)
Programmable reference voltage output. Derived from a trimmed internal bandgap reference.
May be used as the reference for system DAC and ADC.
POR
OUT
Power-on reset for the application system. Active low guaranteed by design to be active on
power up. Also occurs as a result of V
CC(A)
degrading below the BLACKOUT under-voltage
threshold.
TRIP ADJ
V
UV (TRIP)
; trip threshold adjust input (an external resistor divider between V
CC(A)
and ground) for
the under-voltage BLACKOUT fault monitor. A capacitor at this terminal can provide for time
domain filtering.
CLK
f
CLK(2MHz)
; reference for all internal analog signal-processing functions. Affects frequency
domain placement of all poles, zeros, and bandwidths.
SER DATA IN
Non-inverting microcontroller serial-data input used for transferring data to all internal parameter
and mode-control registers.
CLK SER
f
CLK(SER)
; reference for the serial data interface. Data is transferred on the positive-going edge
of this clock.
LOAD
Active low. Begins and ends data transfer.
EXT XFR
Direct clock gating data from temporary internal latch to control register. This continuous time
input is redundant to the XFR bit, which is embedded in the serial data format. It is internally
synchronized to the f
CLK(2MHz)
positive-going edge.
AMUX
1
Analog input or output. Also used to drive internal nodes.
AMUX
2
Analog input or output. Also used to drive internal nodes for calibration and measurement on
internal analog functions.
DMUX
OUT
Non-inverting digital multiplexer output. Used to probe internal nodes allowing precise time-
domain measurements. Also used to extract internal status and diagnostic information.
OUT
P
V
OUT(P)
; voice-coil power output. Full-bridge differential complement to V
OUT(N)
.
OUT
N
V
OUT(N)
; voice-coil power output. Full-bridge differential complement to V
OUT(P)
.
V
SENS(act)
The voltage at this terminal is proportional to voice-coil actuator current.
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