参数资料
型号: ADSP-BF531SBBCZ4RL
厂商: Analog Devices Inc
文件页数: 46/64页
文件大小: 0K
描述: IC DSP CTLR 16BIT 400MHZ 160-CSP
产品培训模块: Blackfin® Processor Core Architecture Overview
Blackfin® Device Drivers
Blackfin® Optimizations for Performance and Power Consumption
Blackfin® System Services
标准包装: 1
系列: Blackfin®
类型: 定点
接口: SPI,SSP,UART
时钟速率: 400MHz
非易失内存: ROM(1 kB)
芯片上RAM: 52kB
电压 - 输入/输出: 3.30V
电压 - 核心: 1.20V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 160-LFBGA,CSPBGA
供应商设备封装: 160-CSPBGA(12x12)
包装: 标准包装
其它名称: ADSP-BF531SBBCZ4RLDKR
ADSP-BF531 / ADSP-BF532 / ADSP-BF533
Capacitive Loading
16
Output delays and holds are based on standard capacitive loads:
30 pF on all pins (see Figure 47 ). V LOAD is 0.95 V for V DDEXT
(nominal) = 1.8 V or 1.5 V for V DDEXT (nominal) =
2.5 V/3.3 V. Figure 48 through Figure 59 on Page 48 show how
output rise time varies with capacitance. The delay and hold
specifications given should be derated by a factor derived from
these figures. The graphs in these figures may not be linear out-
side the ranges shown.
14
12
10
8
6
RISE TIME
FALL TIME
4
TESTER PIN ELECTRONICS
2
50 Ω
V LOAD
T1
DUT
0
0
50
100 150
200
250
70 Ω
50 Ω
45 Ω
ZO = 50 Ω (impedance)
TD = 4.04 ± 1.18 ns
OUTPUT
LOAD CAPACITANCE (pF)
Figure 48. Typical Rise and Fall Times (10% to 90%) vs. Load Capacitance for
Driver A at V DDEXT = 1.75 V
4pF
2pF
0.5pF
14
400 Ω
12
RISE TIME
10
NOTES:
THE WORST CASE TRANSMISSION LINE DELAY IS SHOWN AND CAN BE USED
FOR THE OUTPUT TIMING ANALYSIS TO REFELECT THE TRANSMISSION LINE
EFFECT AND MUST BE CONSIDERED. THE TRANSMISSION LINE (TD) IS FOR
LOAD ONLY AND DOES NOT AFFECT THE DATA SHEET TIMING SPECIFICATIONS.
ANALOG DEVICES RECOMMENDS USING THE IBIS MODEL TIMING FOR A GIVEN
SYSTEM REQUIREMENT. IF NECESSARY, A SYSTEM MAY INCORPORATE
EXTERNAL DRIVERS TO COMPENSATE FOR ANY TIMING DIFFERENCES.
Figure 47. Equivalent Device Loading for AC Measurements
8
6
4
2
FALL TIME
(Includes All Fixtures)
0
0
50
100 150
200
250
LOAD CAPACITANCE (pF)
Figure 49. Typical Rise and Fall Times (10% to 90%) vs. Load Capacitance for
Driver A at V DDEXT = 2.25 V
12
10
RISE TIME
8
FALL TIME
6
4
2
0
0
50
100 150
200
250
LOAD CAPACITANCE (pF)
Figure 50. Typical Rise and Fall Times (10% to 90%) vs. Load Capacitance for
Driver A at V DDEXT = 3.65 V
Rev. I
|
Page 46 of 64 |
August 2013
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