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ADS5273_14 Datasheet, PDF (4/33 Pages) Texas Instruments – 8-Channel, 12-Bit, 70MSPS Analog-to-Digital Converter
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ADS5273
SBAS305D – JANUARY 2004 – REVISED JANUARY 2009 .............................................................................................................................................. www.ti.com
ELECTRICAL CHARACTERISTICS
TMIN = –40°C and TMAX = +85°C. Typical values are at TA = +25°C, clock frequency = 70MSPS, 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.
PARAMETER
DC ACCURACY
No Missing Codes
DNL Differential Nonlinearity
INL Integral Nonlinearity
Offset Error(1)
Offset Temperature Coefficient
Fixed Attenuation in Channel(2)
Fixed Attenuation Matching Across Channels
Gain Error/Reference Error(3)
Gain Error Temperature Coefficient
POWER REQUIREMENTS(4)
Internal Reference
Power Dissipation
Total Power Dissipation
External Reference
Power Dissipation
Total Power Dissipation
Total Power-Down
REFERENCE VOLTAGES
VREFT Reference Top (internal)
VREFB Reference Bottom (internal)
VCM Common-Mode Voltage
VCM Output Current(5)
VREFT Reference Top (external)
VREFB Reference Bottom (external)
External Reference Common-Mode
External Reference Input Current(6)
TEST CONDITIONS
fIN = 5MHz
fIN = 5MHz
VREFT – VREFB
ADS5273
MIN
TYP
MAX
–0.99
–3.0
–0.75
–2.5
Tested
±0.34
±0.43
±6
1.5
0.01
±1.0
±20
+1.2
+3.0
+0.75
0.2
+2.5
Analog Only (AVDD)
Output Driver (LVDD)
Analog Only (AVDD)
Output Driver (LVDD)
Clock Running
±50mV Change in Voltage
800
203
1003
868
231
1099
734
203
937
95
149
1.9
0.9
1.4
1.825
0.9
1.95
0.95
1.45
±2.0
1.95
0.95
VCM ± 50mV
1.0
2.0
1.0
1.5
2.0
1.075
UNITS
LSB
LSB
%FS
ppm/°C
%FS
dB
%FS
ppm/°C
mW
mW
mW
mW
mW
mW
mW
V
V
V
mA
V
V
V
mA
(1) Offset error is the deviation of the average code from mid-code with –1dBFS sinusoid from ideal mid-code (2048). 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) The reference voltages are trimmed at production so that (VREFT – VREFB) is within ± 25mV of the ideal value of 1V. It 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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