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ADS5242IPAP Arkusz danych(PDF) 4 Page - Texas Instruments

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Numer części ADS5242IPAP
Szczegółowy opis  4-Channel, 12-Bit, 65MSPS Analog-to-Digital Converter with Serial LVDS Interface
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Producent  TI [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI - Texas Instruments

ADS5242IPAP Arkusz danych(HTML) 4 Page - Texas Instruments

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ELECTRICAL CHARACTERISTICS
ADS5242
SBAS330C – OCTOBER 2004 – REVISED OCTOBER 2005
T
MIN = –40°C and TMAX = +85°C. Typical values are at TA = +25°C, clock frequency = maximum specified, 50% clock duty
cycle, AVDD = 3.3V, LVDD = 3.3V, –1dBFS, I
SET = 56.2kΩ, internal voltage reference, and LVDS buffer current at 3.5mA per
channel, unless otherwise noted. All values are applicable after the device has been reset.
ADS5242
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
DC ACCURACY
No Missing Codes
Tested
DNL Differential Nonlinearity
fIN = 5MHz
–0.95
±0.31
+1.0
LSB
INL Integral Nonlinearity
fIN = 5MHz
–2.5
±0.41
+2.5
LSB
Offset Error(1)
–0.75
+0.75
%FS
Offset Temperature Coefficient
±6
ppm/°C
Fixed Attenuation in Channel(2)
1.5
%FS
Fixed Attenuation Matching Across Channels
±0.01
0.2
dB
Gain Error/Reference Error(3)
VREFT – VREFB
–2.5
±1.0
+2.5
%FS
Gain Error Temperature Coefficient
±20
ppm/°C
POWER REQUIREMENTS(4)
Internal Reference
Power Dissipation
Analog Only (AVDD)
500
545
mW
Output Driver (LVDD)
160
191
mW
Total Power Dissipation
660
736
mW
External Reference
Power Dissipation
Analog Only (AVDD)
434
mW
Output Driver (LVDD)
160
mW
Total Power Dissipation
594
mW
Total Power-Down
Clock Running
92
149
mW
REFERENCE VOLTAGES
VREFT Reference Top (internal)
1.9
1.95
2.0
V
VREFB Reference Bottom (internal)
0.9
0.95
1.0
V
VCM Common-Mode Voltage
1.4
1.45
1.5
V
VCM Output Current(5)
±50mV Change in Voltage
±2.0
mA
VREFT Reference Top (external)
1.825
1.95
2.0
V
VREFB Reference Bottom (external)
0.9
0.95
1.075
V
External Reference Common-Mode
VCM ± 50mV
V
External Reference Input Current(6)
0.5
mA
(1)
Offset error is the deviation of the average code with a –1dBFS coherent sinusoid input from mid-code (2048).
(2)
Fixed attenuation in the channel arises due to a fixed attenuation 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 (VREFT – VREFB).
(3)
The reference voltages are trimmed at production so that (VREFT – VREFB) is within ± 25mV of the ideal value of 1V. This specification
does not include fixed attenuation.
(4)
Supply current can be calculated from dividing the power dissipation by the supply voltage of 3.3V.
(5)
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.
(6)
Average current drawn from the reference pins in the external reference mode.
4


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