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ADS5240 Datasheet(Fiches technique) 4 Page - Burr-Brown (TI)

[Old version datasheet] Texas Instruments acquired Burr-Brown Corporation. Click here to check the latest version.
Numéro de pièce ADS5240
Description  4-Channel, 12-Bit, 40MSPS ADC with Serial LVDS Interface
Télécharger  24 Pages
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Fabricant  BURR-BROWN [Burr-Brown (TI)]
Site Internet  http://www.burr-brown.com
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 4 page
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ELECTRICAL CHARACTERISTICS
ADS5240
SBAS326C – JUNE 2004 – REVISED DECEMBER 2004
T
MIN = -40°C and TMAX = +85°C. Typical values are at TA = 25°C, clock frequency = 40MSPS, 50% clock duty cycle,
AVDD = 3.3V, LVDD = 3.3V differential, transformer coupled inputs, -1dBFS, I
SET = 56.2kΩ, internal voltage reference, and
LDVS buffer current at 3.5mA per channel, unless otherwise noted.
ADS5240
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
DC ACCURACY
No Missing Codes
Assured
DNL Differential Nonlinearity
fIN = 5MHz
-0.9
±0.4
+0.9
LSB
INL Integral Nonlinearity
fIN = 5MHz
-2.0
±0.75
+2.0
LSB
Offset Error(1)
-0.75
±0.2
+0.75
%FS
Offset Temperature Coefficient
14
ppm/
°C
Fixed Attenuation in Channel(2)
1
%FS
Variable Attenuation in Channel(3)
±0.2
%FS
Gain Error(4)
REFT - REFB
-5
±1.0
+5
%FS
Attenuation Temperature
44
ppm/
°C
Coefficient(5)
POWER SUPPLY
ICC Total Supply Current
VIN = FS, FIN = 5MHz
184
mA
I(AVDD) Analog Supply Current
VIN = FS, FIN = 5MHz
142
mA
VIN = FS, FIN = 5MHz,
I(LVDD) Digital Output Driver Supply Current
42
mA
LVDS into 100
Ω Load
Power Dissipation
607
650
mW
Power-Down
Clock Running
95
mW
REFERENCE VOLTAGES
VREFT Reference Top (internal)
1.95
2.0
2.05
V
VREFB Reference Bottom (internal)
0.95
1.0
1.05
V
VCM Common-Mode Voltage
1.45
1.5
1.55
V
VCM Output Current(6)
±50mV Change in Voltage
±2
mA
VREFT Reference Top (external)
1.875
V
VREFB Reference Bottom (external)
1.125
V
External Reference Input Current(7)
1.0
mA
ANALOG INPUT
Differential Input Capacitance
4.0
pF
Analog Input Common-Mode Range
VCM ± 0.05
V
Differential Input Voltage Range
1.5
2.02
VPP
Differential Input Signal at 4VPP
Voltage Overhead Recovery Time
4.0
CLK Cycles
Recovery to Within 1% of Code
Input Bandwidth
-3dBFS
300
MHz
DIGITAL DATA OUTPUTS
Data Bit Rate
240
480
MBPS
(1)
Offset error is the deviation of the average code from mid-code for a zero input. Offset error is expressed in terms of % of full-scale.
(2)
Fixed attenuation in the channel arises due to a fixed attenuation of about 1% in the sample-and-hold amplifier. When the differential
voltage at the analog input pins are changed from -VREF to +VREF, the swing of the output code is expected to deviate from the full-scale
code (4096LSB) by the extent of this fixed attenuation.
NOTE: VREF is defined as (REFT - REFB).
(3)
Variable attenuation in the channel refers to the attenuation of the signal in the channel over and above the fixed attenuation.
(4)
The reference voltages are trimmed at production so that (VREFT - VREFB) is within ± 50mV of the ideal value of 1V. It does not include
fixed attenuation.
(5)
The attenuation temperature coefficient refers to the temperature coefficient of the attenuation in the channel. It does not account for the
variation of the reference voltages with temperature.
(6)
VCM provides the common-mode current for the inputs of all four channels when the inputs are AC-coupled. The VCM output current
specified is the additional drive of the VCM buffer if loaded externally.
(7)
Average current drawn from the reference pins in the external reference mode.
4




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