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ADS5277IPFP bảng dữ liệu(PDF) 4 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  8-Channel, 10-Bit, 65MSPS Analog-to-Digital Converter
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ADS5277IPFP bảng dữ liệu(HTML) 4 Page - Texas Instruments

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ELECTRICAL CHARACTERISTICS
ADS5277
SBAS333D – FEBRUARY 2005 – REVISED JANUARY 2009............................................................................................................................................ www.ti.com
TMIN = –40°C and TMAX = +85°C. Typical values are at TA = +25°C, sampling rate = 65MSPS, 50% clock duty cycle,
AVDD = 3.3V, LVDD = 3.3V, –1dBFS, ISET = 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.
ADS5277
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
DC ACCURACY
No Missing Codes
Tested
DNL Differential Nonlinearity
fIN = 5MHz
–0.5
±0.08
+0.5
LSB
INL Integral Nonlinearity
fIN = 5MHz
–1.0
±0.09
+1.0
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)
718
782
mW
Output Driver (LVDD)
193
218
mW
Total Power Dissipation
911
1000
mW
External Reference
Power Dissipation
Analog Only (AVDD)
652
mW
Output Driver (LVDD)
193
mW
Total Power Dissipation
845
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)
1.0
mA
(1)
Offset error is the deviation of the average code from mid-code with –1dBFS sinusoid from mid-code (512). Offset error is expressed in
terms of % of full-scale.
(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
(1024LSB) by the extent of this fixed attenuation. NOTE: VREF is defined as (REFT – REFB).
(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 eight 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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