LM4040_07 Datasheet, PDF (26/51 Pages) Zetex Semiconductors – Precision micropower shunt voltage references

LM4040
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
SLOS456J – JANUARY 2005 – REVISED SEPTEMBER 2006
TYPICAL CHARACTERISTICS
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0.6
0.5 ^{VZ = 2.5 V}
0.4
I_Z = 150 µA
50 ppm/°C
0.3 _{20 ppm/°C}
0.2 7 ppm/°C
0.1
0
−0.1
−0.2
−0.3
−0.4
−40 −20 0
20 40 60 80 100 120
Temperature (_C)
Figure 1. Temperature Drift for Different Average
Temperature Coefficients
1000
No Capacitor
100
V_Z = 2.5 V
10 ^IZ ^{= 1 mA}
T_J = 25°C
I_Z,AC = 0.1 I_Z
1
1-µF
Tantanlum
Capacitor
0.1
100
X_C
1k
10k
100k
1M
Frequency (Hz)
Figure 3. Output Impedance vs Frequency
10
V_Z = 2.5 V
I_Z = 200 µA
T_J = 25°C
1
0.1
1
10
100
1k
Frequency (Hz)
10k 100k
Figure 5. Noise Voltage vs Frequency
1000
100
No Capacitor
10
1
0.1
100
V_Z = 2.5 V
I_Z = 150 µA
T_J = 25°C
I_Z,AC = 0.1 I_Z
1 µF
Tantanlum
Capacitor
X_C
1k
10k
100k
1M
Frequency (Hz)
Figure 2. Output Impedance vs Frequency
120
V_Z = 2.5 V
100 _{TJ = 25°C}
80
60
40
20
0
00.0 0.5 11.0 11..55 22.0 2.5 33.0
V_Z, Reverse Voltage (V)
Figure 4. Temperature Drift for Different Average
Temperature Coefficient
6
5
4
3
2
1
0
−1
−10 0
6
V_Z = 2.5 V
T_J = 25°C
R_S = 30 kΩ
4
V_IN
2
0
−2
−4
V_Z
−6
−8
−10
−12
10 20 30 40 50 60 70 80 90
Response Time (µs)
Figure 6. Start-Up Characteristics
26
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