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AD9148BBPZ Arkusz danych(PDF) 8 Page - Analog Devices

Numer części AD9148BBPZ
Szczegółowy opis  Quad 16-Bit,1 GSPS, TxDAC Digital-to-Analog Converter
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Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
Logo AD - Analog Devices

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AD9148
Preliminary Technical Data
Rev. PrA | Page 8 of 73
ABSOLUTE MAXIMUM RATINGS
Table 6.
Parameter
With
Respect To
Rating
AVDD33, IOVDD
AGND,
DGND,
CGND
−0.3 V to +3.6 V
DVDD18, CVDD18
AGND,
DGND,
CGND
−0.3 V to +2.10 V
AGND
DGND,
CGND
−0.3 V to +0.3 V
DGND
AGND,
CGND
−0.3 V to +0.3 V
CGND
AGND,
DGND
−0.3 V to +0.3 V
I120, VREF
AGND
−0.3 V to AVDD33 + 0.3 V
OUT1_P, OUT1_N,
OUT2_P, OUT2_N,
OUT3_P, OUT3_N,
OUT4_P, OUT4_N
AGND
−1.0 V to AVDD33 + 0.3 V
A15_P to A0_P,
A15_N to A0_N,
B15_P to B0_P,
B15_N, B0_N
DGND
−0.3 V to DVDD18 + 0.3 V
DCIA_P, DCIA_N,
FRAMEA_P, FRAMEA_N,
DCIB_P, DCIB_N,
FRAMEB_P, FRAMEB_N
DGND
−0.3 V to DVDD18+ 0.3 V
CLK_P, CLK_N,
REFCLK_P, REFCLK_N
CGND
−0.3 V to CVDD18 + 0.3
V
CSB, SCLK, SDIO, SDO,
TDO, TDI, TCK, TMS,
RESETE, IRQE, PLL_LOCK
DGND
−0.3 V to IOVDD + 0.3 V
Junction Temperature
125°C
Storage Temperature
Range
−65°C to +150°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
THERMAL RESISTANCE
Typical θJA, θJB, and θJC are specified vs. the number of PCB layers in
still air for each package offering Airflow increases heat dissipation
effectively reducing θJA and θJB.
Table 7. Thermal Resistance
Package Type
θJA
θJB
θJC
Unit
Notes
196-Ball CSP_BGA
24.7
12.6
5.7
°C/W
4-layer board,
25 PCB vias
19.2
10.9
5.3
°C/W
8-layer board,
25 PCB vias
18.1
10.5
5.3
°C/W
10-layer board,
25 PCB vias
18.0
10.5
5.3
°C/W
12-layer board,
25 PCB vias
196-Ball BGA_EP
20.9
8.6
3.1
°C/W
4-layer board,
25 PCB vias
16.2
7.7
3.1
°C/W
8-layer board,
25 PCB vias
15.2
7.4
3.1
°C/W
10-layer board,
25 PCB vias
15.0
7.4
3.1
°C/W
12-layer board,
25 PCB vias
MAXIMUM SAFE POWER DISSIPATION
The maximum junction temperature for the AD9148 is 125°C.
With the thermal resistance of the molded package (CSP_BGA)
given for a 12 layer board, the maximum power that can be
dissipated in this package can be calculated as
(
) (
)
W
T
T
Power
JA
A
J
MAX
22
.
2
0
.
18
85
125
=
=
θ
=
To increase the maximum power, the AD9148 is available in a
second package option (BGA_EP) which includes a heat spreader
on top of the package. Also, an external heat sink can be
attached to the top of the AD9148 CSP_BGA package. The
adjusted maximum power for each of these conditions is shown in
Table 8.
With the thermal resistance of the heat spreader package
(BGA_EP) given for a 12 layer board, the maximum power that
can be dissipated in this package can be calculated as
(
) (
)
W
T
T
Power
JA
A
J
MAX
67
.
2
0
.
15
85
125
=
=
θ
=
To increase the maximum power, an external heat sink can be
attached to the top of the AD9148 BGA_EP package. The
adjusted maximum power for an external heat sink is shown in
Table 8.
To aid in the selection of package, the maximum fDAC rate for a given
power dissipation over several operating conditions is shown in
Table 9. The maximum fDACrate applies to all interpolation rates.
Note that if the programmable inverse sinc filter is enabled the
maximum fDAC rate specified in Table 9 decreases.
ESD CAUTION


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