DS2780 Datasheet, PDF (8/9 Pages) Maxim Integrated Products – Stand-Alone Fuel Gauge IC

DG9432/9433/9434
Vishay Siliconix
New Product
TEST CIRCUITS
Switc
h
Input
Logi
c
Input
V+
V+
NO or NC
COM
IN
GND
0V
Switch Output
V_OUT
R_L
300 W
C_L
35 pF
C_L (includes fixture and stray capacitance)
ǒ Ǔ V_OUT + V_COM
R_L
R_L ) R_ON
Logic
Input
0V
50%
t_r t
20 ns
t_f t 20 ns
Switch
Output
0V
t_ON
0.9 x V_OUT
t_OFF
Logic “1” = Switch On
Logic input waveforms inverted for switches that have
the opposite logic sense.
FIGURE 1. Switching Time
V+
V+
NO or NC
V₁
NO or NC
V₂
COM₁
COM₂
GND
R_L
300 W
C_L
35 pF
Logic
Input
0V
V_NC = V_NO
V_O
Switch _{0 V}
Output
90%
t_D
C_L (includes fixture and stray capacitance)
FIGURE 2. Break-Before-Make Interval
t_r <5 ns
t_f <5 ns
t_D
V+
V_gen
R_gen
+
3V
V+
NC or NO
COM
IN
GND
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V_OUT
C_L
V_OUT
DV_OUT
IN
On
Off
On
Q = DV_OUT x C_L
IN depends on switch configuration: input polarity
determined by sense of switch.
FIGURE 3. Charge Injection
Document Number: 72311
S-31643—Rev. A, 01-Aug-03