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參數資料
| 型號： | LM3999 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Precision Reference |
| 中文描述： | 精密參考 |
| 文件頁數： | 4/12頁 |
| 文件大小： | 292K |
| 代理商： | LM3999 |
Electrical Characteristics
(Note 3) (Continued)
Parameter
Conditions
LM3999Z
Typ
140
Units
Min
Max
200
Initial Turn-On Current
9
≤
V
S
≤
40, T
A
= 25C
mA
Electrical Characteristics
(Notes 3, 6)
Parameter
Conditions
LM199AH, LM299AH
Min
Typ
6.8
6.95
6
LM399AH
Typ
6.95
6
Units
Max
7.1
9
Min
6.6
Max
7.3
12
Reverse Breakdown Voltage
Reverse Breakdown Voltage
Change with Current
Reverse Dynamic Impedance
Reverse Breakdown
Temperature Coefficient
0.5 mA
≤
I
R
≤
10 mA
0.5 mA
≤
I
R
≤
10 mA
V
mV
I
R
= 1 mA
55C
≤
T
A
≤
+85C
+85C
≤
T
A
≤
+125C
25C
≤
T
A
≤
85C
0C
≤
T
A
≤
+70C
10 Hz
≤
f
≤
10 kHz
Stabilized, 22C
≤
T
A
≤
28C,
1000 Hours, I
R
=1 mA
±
0.1%
T
A
=25C, Still Air, V
S
=30V
T
A
= 55C
0.5
1
0.5
1.5
LM199A
0.00002
0.0005
0.00002
0.00005
0.0010
0.00005
%/C
%/C
%/C
%/C
μV
ppm
LM299A
LM399A
0.00003
7
20
0.0001
50
RMS Noise
Long Term Stability
7
20
20
Temperature Stabilizer
Supply Current
Temperature Stabilizer
Supply Voltage
Warm-Up Time to 0.05%
Initial Turn-on Current
Note 2:
The substrate is electrically connected to the negative terminal of the temperature stabilizer. The voltage that can be applied to either terminal of the refer-
ence is 40V more positive or 0.1V more negative than the substrate.
Note 3:
These specifications apply for 30V applied to the temperature stabilizer and 55C
≤
T
A
≤
+125C for the LM199; 25C
≤
T
A
≤
+85C for the LM299 and
0C
≤
T
A
≤
+70C for the LM399 and LM3999.
Note 4:
This initial current can be reduced by adding an appropriate resistor and capacitor to the heater circuit. See the performance characteristic graphs to de-
termine values.
Note 5:
Do not wash the LM199 with its polysulfone thermal shield in TCE.
Note 6:
A military RETS electrical test specification is available for the LM199H/883, LM199AH/883, and LM199AH-20/883 on request.
8.5
22
14
28
40
8.5
15
mA
9
9
40
V
V
S
= 30V, T
A
= 25C
9
≤
V
S
≤
40, T
A
=+25C, (Note 4)
3
3
sec.
mA
140
200
140
200
Ordering Information
Initial
Tolerance
2%
5%
0C to +70C
25C to +85C
55C to +125C
NS
Package
H04D
H04D
LM299AH
LM299H
LM199AH, LM199AH/883
LM399H
LM399AH
LM3999Z
5%
Z03A
Certified Long Term Drift
The National Semiconductor LM199AH-20, LM299AH-20,
and LM399AH-50 are ultra-stable Zener references specially
selected from the production runs of LM199AH, LM299AH,
LM399AH and tested to confirm a long-term stability of 20,
20, or 50 ppm per 1000 hours, respectively. The devices are
measured every 168 hours and the voltage of each device is
logged and compared in such a way as to show the deviation
from its initial value. Each measurement is taken with a
probable-worst-case deviation of
±
2 ppm, compared to the
Reference Voltage, which is derived from several groups of
NBS-traceable references such as LM199AH-20’s, 1N827’s,
and saturated standard cells, so that the deviation of any one
group will not cause false indications. Indeed, this compari-
son process has recently been automated using a specially
prepared computer program which is custom-designed to re-
ject noisy data (and require a repeat reading) and to record
the average of the best 5 of 7 readings, just as a sagacious
standards engineer will reject unbelievable readings.
The typical characteristic for the LM199AH-20 is shown be-
low. This computerized print-out form of each reference’s
stability is shipped with the unit.
www.national.com
4
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM3999Z | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:IC-6.95V PRECISION REFERENCE |
| LM399A | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Precision Reference |
| LM399ADR | 制造商:Texas Instruments 功能描述: |
| LM399AH | 功能描述:IC VREF SHUNT PREC 6.95V TO-46-4 RoHS:否 類別:集成電路 (IC) >> PMIC - 電壓基準 系列:- 標準包裝:3,000 系列:- 基準類型:旁路，精度 輸出電壓:3V 容差:±0.5% 溫度系數:100ppm/°C 輸入電壓:- 通道數:1 電流 - 陰極:82µA 電流 - 靜態(tài):- 電流 - 輸出:15mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-TSSOP（5 引線），SC-88A，SOT-353 供應商設備封裝:SC-70-5 包裝:帶卷 (TR) 其它名稱:296-20888-2 |
| LM399AH#PBF | 制造商:Linear Technology 功能描述:V-Ref Precision 6.95V 10mA 4-Pin TO-46 制造商:Linear Technology 功能描述:IC VREF SHUNT PREC 6.95V TO-46-4 |
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