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参数资料
| 型号： | AD261BND-5 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 6/6页 |
| 文件大小： | 0K |
| 描述： | IC LOGIC ISO/3.5KV 5:0IO 22DIP |
| 标准包装： | 1 |
| 系列： | IsoLogic™ |
| 输入 - 1 侧/2 侧： | 2/3 |
| 通道数： | 5 |
| 电源电压： | 4 V ~ 5.75 V |
| 电压 - 隔离： | 1250Vrms |
| 数据速率： | 40MBd |
| 传输延迟： | 14ns |
| 输出类型： | 三态 |
| 封装/外壳： | 22-DIP 模块 |
| 供应商设备封装： | 22-PDIP |
| 包装： | 管件 |
| 工作温度： | -25°C ~ 85°C |
AD261
Logic information is sent across the barrier as “set-hi/set-lo”
SCHMITT
TRIGGER
3.5kV
ISOLATION
DATA
OUTPUT
data that is derived from logic level transitions of the input. At
power-up or after a fault condition, an output might not repre-
sent the state of the respective channel input to the isolator. An
DATA IN
BUFFER
D Q
DRIVER
BARRIER
RECEIVER BUFFER
OUT
internal circuit operates in the background which interrogates
all inputs about every 5 μ s and in the absence of logic transi-
tions, sends appropriate “set-hi” or “set-lo” data across the
ENABLE
G
GATED
TRANSPARENT
CONTINUOUS
UPDATE CIRCUIT
ENABLE
barrier.
Recovery time from a fault condition or at power-up is thus
between 5 μ s and 10 μ s.
LATCH
Figure 1. Simplified Block Diagram
POSITIVE GOING
INPUT
OUTPUT
63%
INPUT THRESHOLD
NEGATIVE GOING
INPUT THRESHOLD
HYSTERESIS
37%
t ff
PROPAGATION DELAY
t PD = 14ns
BUFFER
DELAY LINE
BUFFER
EFFECTIVE
CIRCUIT
14ns
100
MODEL
5pF
INPUT
5pF
OUTPUT
CAPACITANCE
t rr = t ff = 100 x C TOTAL OUTPUT CAPACITANCE
0.5ns – NO LOAD
= 5.5ns INTO 50pF
CAPACITANCE
TOTAL DELAY = t PD
t rr = 13ns (NO LOAD), 18ns (50pF LOAD)
Figure 2. Typical Timing and Delay Models
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
22-Pin Plastic DIP
(ND-22A)
1.500 (38.1) MAX
0.440
0.550 (13.97)
MAX
SIDE VIEW
(11.18)
END VIEW
1
8
15
22
MAX
0.100
0.160 (4.06)
0.140 (3.56)
0.050 (1.27)
0.020
(0.508
0.010
0.254)
(2.54)
0.350
(8.89)
16 PLACES
0.075 (1.91)
PIN 1
BOTTOM
0.250
(6.35)
SYSTEM
VIEW
0.738* (18.75)
FIELD
0.050
0.650 (16.51)
(1.27)
*CREEPAGE PATH (SUBTRACT APPROXIMATELY
0.079 (2mm) FOR SOLDER PAD RADII ON PC BOARD.
THIS SPACING SUPPORTS THE INTRINSICALLY SAFE
RATING OF 750V.
–6 –
REV. 0
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