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ADS5237IPAGTG4 bảng dữ liệu(PDF) 4 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  Dual, 10-Bit, 65MSPS, 3.3V Analog-to-Digital Converter
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ADS5237IPAGTG4 bảng dữ liệu(HTML) 4 Page - Texas Instruments

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ELECTRICAL CHARACTERISTICS
ADS5237
SBAS420A – AUGUST 2007 – REVISED OCTOBER 2007
TMIN = –40°C and TMAX = +85°C. Typical values are at TA = +25°C, clock frequency = 65MSPS, 50% clock duty cycle,
AVDD = 3.3V, VDRV = 3.3V, transformer-coupled inputs, –1dBFS, ISET = 56.2kΩ, and internal voltage reference, unless
otherwise noted.
ADS5237
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
DC ACCURACY
No missing codes
Tested
DNL Differential nonlinearity
fIN = 5MHz
–0.5
±0.1
+0.5
LSB
INL Integral nonlinearity
fIN = 5MHz
–1
±0.1
+1
LSB
Offset error(1)
–0.75
0.2
+0.75
%FS
Offset temperature coefficient(2)
±6
ppm/
°C
Fixed attenuation in channel(3)
1
%FS
Fixed attenuation matching across channels
0.01
0.2
dB
Gain error/reference error(4)
–3.5
±1.0
+3.5
% FS
Gain error temperature coefficient
±40
ppm/
°C
POWER REQUIREMENTS(5)
Internal Reference
Power dissipation(5)
Analog only (AVDD)
260
297
mW
Output driver (VDRV)
106
136
mW
Total power dissipation
366
433
mW
External Reference
Power dissipation
Analog only (AVDD)
224
mW
Output driver (VDRV)
106
mW
Total power dissipation
330
mW
VREFT
1.875
2
2.05
mW
VREFB
0.95
1
1.125
mW
Total Power-Down
88
mW
REFERENCE VOLTAGES
VREFT Reference top (internal)
1.9
2.0
2.1
V
VREFB Reference bottom (internal)
0.9
1.0
1.1
V
VCM Common-mode voltage
1.4
1.5
1.6
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 common-mode
VCM ±50mV
V
External reference input current(7)
1.0
mA
(1)
Offset error is the deviation of the average code from mid-code with –1dBFS sinusoid from ideal mid-code (512). Offset error is
expressed in terms of percent of full-scale.
(2)
If the offset at temperatures T1 and T2 is O1 and O2, respectively (where O1 and O2 are measured in LSBs), the offset temperature
coefficient in ppm/
°C is calculated as (O
1 – O2)/(T1 – T2) × 1
6/1024.
(3)
Fixed attenuation in the channel arises because of a fixed attenuation in the sample-and-hold amplifier. When the differential voltage at
the analog input pins is 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).
(4)
The reference voltages are trimmed at production so that (VREFT – VREFB) is within ± 35mV of the ideal value of 1V. This specification
does not include fixed attenuation.
(5)
Supply current can be calculated from dividing the power dissipation by the supply voltage of 3.3V.
(6)
The VCM output current specified is the 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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Copyright © 2007, Texas Instruments Incorporated
Product Folder Link(s): ADS5237


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