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参数资料
| 型号： | MC34921AER2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 15/36页 |
| 文件大小： | 0K |
| 描述： | IC MOTOR DRVR PWM DC DUAL 64LQFP |
| 标准包装： | 1,500 |
| 应用： | DC 电机驱动器，步进电机驱动器，H 桥式 |
| 输出数： | 2 |
| 电流 - 输出： | ±4.5A |
| 电压 - 负载： | 0 V ~ 38 V |
| 电源电压： | 4.8 V ~ 5.2 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-LQFP 裸露焊盘 |
| 供应商设备封装： | 64-LQFP EP（10x10） |
| 包装： | 带卷 (TR) |
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DYNAMIC ELECTRICAL CHARACTERISTICS
Table 4. Dynamic Electrical Characteristics (continued)
Characteristics noted under conditions 16 V ≤ B+ ≤ 34 V, 0 ° C ≤ T A ≤ 70 ° C, and 0 ° C ≤ T J ≤ 100 ° C unless otherwise noted.
Typical values noted reflect the approximate parameter means at T A = 25°C under nominal conditions unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max
Unit
Supervisor Circuitry
RST Delay
t delay (RST)
t SCLK
V 5.0 = ≥ +4.9 V
RST Filter Time
V 5.0 = 5.0 V
RST Fall Time
t filter
t f
128
–
–
3.25
128
–
μ s
ns
V 5.0 = 5.0 V, C L = 100 pF, I PULLUP = 0.75 mA(external), 90% to 10% of
–
7.0
20
V 5.0
External Input Low to RST Pulled Low
t slpl
ns
V 5.0 = 5.0 V (25)
–
26
60
Analog Encoder Interface Variable Gain Stage
Adjustable Gain (Ideal)
Settings S = 0 to 15, Default 0
Settings S = 16 to 31, Default 0
G (Ideal)
(1.0+0.1 * S)
(1.0+0.1 * [S-16]) / 0.375
Gain
G
V/V
Setting = 0
Setting = 31
Gain Step Factor Tolerance
Gain Step Size Gs/G(s- 1 ) S = 1 to 31
GSF
0.8
6.0
1.01
1.0
6.6
1.02
1.2
7.2
1.2
V/V
Analog Encoder Interface Digital Signal Conversion Stage
Operating Frequency
Comparator Filter Time (24)
Filter Configuration Bit Set to 0
Filter Configuration Bit Set to 1
f OP(MAX)
t filter
0
3.0
6.0
–
–
–
15
4.0
7.0
kHz
SCLK
Cycles
ADC
Sample and Hold Acquisition Time
t sh
t SCLK
A/D Speed Bit = 0
A/D Speed Bit = 1
Conversion Time (Return Word Clocked Out Immediately Following t c )
A/D Speed Bit = 0
A/D Speed Bit = 1
t c
15
31
–
–
–
–
–
–
16
32
48
96
t SCLK
Master Oscillator
Operating Frequency
f OP
kHz
B+ ≥ 12 V
150
200
250
Notes
24. Guaranteed by design.
34921
Analog Integrated Circuit Device Data
Freescale Semiconductor
15
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