Rainbow Electronics DS3904 - Manual (Page 5)

DS3904
DS3904 Triple 128-Position Nonvolatile
Variable Digital Resistor/Switch
_____________________________________________________________________ 5
Typical Operating Characteristics
(V CC = +5.0V; 20kΩ plots apply to Res0, Res1, and Res2, T A = +25°C unless otherwise noted.)
RESISTANCE
vs. POSITION
DS3904 toc03
POSITION (DEC)
RESISTANCE (k
Ω
)
125 100 75 50 25
5
10
15
20
25
0
0
RESISTORS
0, 1, AND 2
SUPPLY CURRENT
vs. SCL FREQUENCY
DS3904 toc02
SCL FREQUENCY (kHz)
SUPPLY CURRENT (
µ
A)
350 300 200 250 100 150 50
20
40
60
80
100
120
140
160
180
200
0
0 400
V CC = SDA = +5V
+25°C
SUPPLY CURRENT
vs. TEMPERATURE
DS3904 toc01
TEMPERATURE (°C)
SUPPLY CURRENT (
µ
A)
60 40 -20 0 20
20
40
60
80
100
120
140
160
0
-40 80
V CC = +5V
V CC = +3V
POSITION 00h RESISTANCE PERCENT
CHANGE FROM +25°C vs. TEMPERATURE
DS3904 toc06
TEMPERATURE (°C)
RESISTANCE % CHANGE (FROM 25
°
C)
80 60 20 40 0 -20
-2.0
-1.5
-1.0
-0.5
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
-2.5
-40
RESISTORS 0, 1, AND 2
POSITION 7Fh RESISTANCE PERCENT
CHANGE FROM +25°C vs. TEMPERATURE
DS3904 toc05
TEMPERATURE (°C)
RESISTANCE % CHANGE (FROM 25
°
C)
60 40 20 0 -20
-0.2
0
0.2
0.4
0.6
0.8
1.0
-0.4
-40 80
RESISTORS 0, 1, AND 2
TEMPERATURE COEFFICIENT
vs. POSITION
DS3904 toc04
POSITION (DEC)
TEMPERATURE COEFFICIENT (ppm/
°
C)
100 80 20 40 60
-100
0
100
200
300
400
500
600
-200
0 120
TC OF +25°C TO +85°C
TC OF +25°C TO -40°C
RESISTORS
0, 1, AND 2
POSITION 3Fh RESISTANCE
vs. SUPPLY VOLTAGE
DS3904 toc09
SUPPLY VOLTAGE (V)
POSITION 3Fh RESISTANCE (k
Ω
)
5.5 5.0 4.5 4.0 3.5 3.0
10.5
11.0
11.5
12.0
12.5
13.0
10.0
2.5 6.0
RESISTORS
0, 1, AND 2
RESISTANCE
vs. POWER-DOWN VOLTAGE
DS3904 toc08
POWER-DOWN VOLTAGE (V)
RESISTANCE (k
Ω
)
5 4 3 2 1
10
20
30
40
50
60
70
80
90
100
0
0 6
>100kΩ
POSITION 3Fh
RESISTORS
0, 1, AND 2
PROGRAMMED
RESISTANCE
RESISTANCE
vs. POWER-UP VOLTAGE
DS3904 toc07
POWER-UP VOLTAGE (V)
RESISTANCE (k
Ω
)
5 4 3 2 1
10
20
30
40
50
60
70
80
90
100
0
0 6
>100kΩ
POSITION 3Fh
RESISTORS
0, 1, AND 2
EEPROM
RECALL
PROGRAMMED
RESISTANCE