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參數(shù)資料
| 型號(hào)： | LM4125 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Precision Micropower Low Dropout Voltage Reference |
| 中文描述： | 精密微功耗低壓差電壓基準(zhǔn) |
| 文件頁(yè)數(shù)： | 5/12頁(yè) |
| 文件大?。?/td> | 300K |
| 代理商： | LM4125 |
Note 1:
“Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see Electrical Characteristics. The
guaranteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed
test conditions.
Note 2:
Without PCB copper enhancements. The maximum power dissipation must be de-rated at elevated temperatures and is limited by T
JMAX
(maximum
junction temperature),
θ
J-A
(junction to ambient thermal resistance) and T
A
(ambient temperature). The maximum power dissipation at any temperature is: PDiss
MAX
= (T
JMAX
T
A
)/
θ
J-A
up to the value listed in the Absolute Maximum Ratings.
Note 3:
The human body model is a 100 pF capacitor discharged through a 1.5 k
resistor into each pin. The machine model is a 200 pF capacitor discharged
directly into each pin.
Note 4:
Typical numbers are at 25C and represent the most likely parametric norm.
Note 5:
Limits are 100% production tested at 25C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control
(SQC) methods. The limits are used to calculate National’s Averaging Outgoing Quality Level (AOQL).
Note 6:
Dropout voltage is the differential voltage between V
OUT
and V
IN
at which V
OUT
changes
≤
1% from V
OUT
at V
IN
= 3.3V for 2.0V, 2.5V and 5V for 4.1V. A
parasitic diode exists between input and output pins; it will conduct if V
OUT
is pulled to a higher voltage than V
IN
.
Note 7:
Thermal hysteresis is defined as the change in +25C output voltage before and after exposing the device to temperature extremes.
Note 8:
Output noise voltage is proportional to V
OUT
. V
N
for other voltage option is calculated using (V
N(1.8V)
/1.8) * V
OUT
. V
N
(2.5V) = (36μV
PP
/1.8) * 2.5 = 46μV
PP
.
Note 9:
Long term stability is change in V
REF
at 25C measured continuously during 1000 hrs.
L
www.national.com
5
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