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LP3939 数据表(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 LP3939
功能描述  Power Amplifier Driver For Dual Band CDMA Handsets
PDF  7 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LP3939 数据表(HTML) 4 Page - National Semiconductor (TI)

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AC Electrical Characteristics
Unless otherwise noted, V
DD1 =VDD2 = 3V, CLOAD = 50 pF. Typical values and limits appearing in normal type apply for TJ =
25˚C. Limits appearing in boldface type apply over the entire junction temperature range for operation, −40˚C to +85˚C.
(Note 7)
Symbol
Parameter
Conditions
Typ
Limit
Units
Min
Max
t
PLH
Propagations Delay
Low to High
EN_CELL to PA_ON or
EN_PCS to PA_ON
10
80
ns
EN_CELL to CELL_ON or
EN_PCS to PCS_ON
R
PD = 100
7
56
ns
GAIN_MODE to CELL_GAIN
or GAIN_MODE to PCS_GAIN
R
PD = 100
7
56
ns
INV_A1 to INV_Y1
10
80
ns
INV_A2 to INV_Y2
25
200
ns
t
PHL
Propagations Delay
High to Low
EN_CELL to PA_ON or
EN_PCS to PA_ON
10
80
ns
EN_CELL to CELL_ON or
EN_PCS to PCS_ON
R
PD = 100
25
200
ns
GAIN_MODE to CELL_GAIN
or GAIN_MODE to PCS_GAIN
R
PD = 100
20
160
ns
INV_A1 to INV_Y1
10
80
ns
INV_A1 to A1_SINK
R
PU =10k
5
40
ns
INV_A2 to INV_Y2
5
40
ns
t
RISE
Rise Time
PA_ON
15
120
ns
INV_Y2
50
400
INV_Y1
20
160
T
FALL
Fall Time
PA_ON
15
120
ns
INV_Y2
10
80
INV_Y1
20
160
Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device
is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the Electrical
Characteristics tables.
Note 2: All voltages are with respect to the potential at the GND pin.
Note 3: The Absolute Maximum power dissipation depends on the ambient temperature and can be calculated using the formula:
where TJ is the junction temperature, TA is the ambient temperature, and θJA is the junction-to-ambient temperature. The 2.0W rating appearing under Absolute
Maximum Ratings results from substituting the Absolute Maximum junction temperature, 150˚C for TJ, 70˚C for TA and 39.8˚C/W for θJA. More power can be
dissipated safely at ambient temperatures below 70˚C. Less power can be dissipated safely at ambient temperatures above 70˚C. The Absolute Maximum power
dissipation can be increased by 25 mW for each degree below 70˚C, and it must be derated by 25 mW for each degree above 70˚C.
Note 4: The human body model is 100 pF discharged through a 1.5 k
Ω resistor into each pin. The machine model is a 200 pF capacitor discharged directly into
each pin.
Note 5: Like the Absolute Maximum power dissipation, the maximum power dissipation depends on the ambient temperature. The 1.38W rating appearing under
Absolute Maximum Ratings results from substituting the Maximum junction temperature, 125˚C for TJ, 70˚C for TA and 39.8˚C/W for θJA. More power can be
dissipated safely at ambient temperatures below 70˚C. Less power can be dissipated safely at ambient temperatures above 70˚C. The Absolute Maximum power
dissipation can be increased by 25 mW for each degree below 70˚C, and it must be derated by 25 mW for each degree above 70˚C.
Note 6: All limits are guaranteed by testing or statistical analysis.
Note 7: All AC parameters are guaranteed by design, not production tested.
www.national.com
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