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ADS4122 Arkusz danych(PDF) 4 Page - Texas Instruments

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Numer części ADS4122
Szczegółowy opis  14-/12-Bit, 65/125MSPS, Ultralow-Power ADC
Download  81 Pages
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Producent  TI1 [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI1 - Texas Instruments

ADS4122 Arkusz danych(HTML) 4 Page - Texas Instruments

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ADS4122, ADS4125
ADS4142, ADS4145
SBAS520A
– FEBRUARY 2011 – REVISED MARCH 2011
www.ti.com
RECOMMENDED OPERATING CONDITIONS
Over operating free-air temperature range, unless otherwise noted.
ADS4122/5, ADS4142/5
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
ADS4122/ADS4142, low-speed mode enabled by default
20
65
MSPS
ADS4125/ADS4145, low-speed mode enabled
20
80
MSPS
ADS4125/ADS4145, low-speed mode disabled
>80
125
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
Low-speed enabled
40
50
60
%
Low-speed disabled
35
50
65
%
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 = 03h, register data = 03h
Set the MODE 2 register bit to get best performance at high input
Mode 2
signal frequencies greater than 230MHz.
Register address = 4Ah, register data = 01h
(1)
With 0dB gain. See the 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 obtain 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.
4
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Copyright
© 2011, Texas Instruments Incorporated
Product Folder Link(s): ADS4122 ADS4125 ADS4142 ADS4145


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