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ADS4149IRGZT bảng dữ liệu(PDF) 6 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  14-/12-Bit, 160/250MSPS, Ultralow-Power ADC
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ADS4126, ADS4129
ADS4146, ADS4149
SBAS483D – NOVEMBER 2009 – REVISED APRIL 2010
www.ti.com
RECOMMENDED OPERATING CONDITIONS
Over operating free-air temperature range, unless otherwise noted.
ADS412x, ADS414x
MIN
TYP
MAX
UNIT
SUPPLIES
AVDD
Analog supply voltage
1.7
1.8
1.9
V
DRVDD
Digital supply voltage
1.7
1.8
1.9
V
ANALOG INPUTS
Differential input voltage range(1)
2
VPP
Input common-mode voltage
VCM ± 0.05
V
Maximum analog input frequency with 2VPP input amplitude
(2)
400
MHz
Maximum analog input frequency with 1VPP input amplitude
(2)
800
MHz
CLOCK INPUT
Input clock sample rate
ADS4129/ADS4149
1
250
MSPS
ADS4126/ADS4146
1
160
MSPS
Input clock amplitude differential (VCLKP – VCLKM)
Sine wave, ac-coupled
0.2
1.5
VPP
LVPECL, ac-coupled
1.6
VPP
LVDS, ac-coupled
0.7
VPP
LVCMOS, single-ended, ac-coupled
1.8
V
Input clock duty cycle
50
%
DIGITAL OUTPUTS
CLOAD
Maximum external load capacitance from each output pin to DRGND
5
pF
Differential load resistance between the LVDS output pairs (LVDS
RLOAD
100
Ω
mode)
TA
Operating free-air temperature
–40
+85
°C
HIGH PERFORMANCE MODES(3)(4)(5)
Set the MODE 1 register bits to get best performance across sample
Mode 1
clock and input signal frequencies.
Register address = 0x03, register data = 0x03
Set the MODE 2 register bit to get best performance at high input
Mode 2
signal frequencies.
Register address = 0x4A, register data = 0x01
(1)
With 0dB gain. See the Fine Gain section in the Application Information for relation between input voltage range and gain.
(2)
See the Theory of Operation section in the Application Information.
(3)
It is recommended to use these modes to get best performance. These modes can be set using the serial interface only.
(4)
See the Serial Interface section for details on register programming.
(5)
Note that these modes cannot be set when the serial interface is not used (when the RESET pin is tied high); see the Device
Configuration section.
6
Submit Documentation Feedback
Copyright © 2009–2010, Texas Instruments Incorporated
Product Folder Link(s): ADS4126 ADS4129 ADS4146 ADS4149


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