Datasheet

ADS8519
www.ti.com SLAS462D –JUNE 2007–REVISED SEPTEMBER 2010
ELECTRICAL CHARACTERISTICS (continued)
At T
A
= –40°C to +85°C, f
s
= 250kSPS, and V
DIG
= V
ANA
= 5V, using internal reference (unless otherwise specified).
ADS8519I ADS8519IB
PARAMETER TEST CONDITIONS MIN TYP MAX MIN TYP MAX UNIT
DC ACCURACY
INL Integral linearity error –3 3 –1.5 1.5 LSB
(2)
DNL Differential linearity error –2 2 –1 1 LSB
No missing codes 15 16 Bits
Transition noise
(3)
0.67 0.67 LSB
±10V range Internal reference –0.5 0.5 –0.25 0.25
Full-scale
%FSR
error
(4) (5)
All other ranges Internal reference –0.5 –0.05 0.5 –0.5 –0.05 0.5
Full-scale error drift Internal reference ±7 ±7 ppm/°C
±10V range External reference –0.05 0.003 0.05 –0.05 0.003 0.05
Full-scale
%FSR
error
(4) (5)
All other ranges External reference –0.5 0.5 –0.5 0.5
Full-scale error drift External reference ±2 ±2 ppm/°C
Bipolar zero error
(4)
–4 4 –2 2 mV
Bipolar zero error drift ±2 ±2 ppm/°C
Unipolar zero
8.192V –20 6 20 –20 6 20 mV
error
(4)
Unipolar zero error drift ±0.4 ±0.4 ppm/°C
Recovery to rated accuracy after
1mF capacitor to CAP 1 1 ms
power down
Power supply sensitivity
+4.75V < V
D
< +5.25V –8 8 –8 8 LSB
(V
DIG
= V
ANA
= V
D
)
AC ACCURACY
SFDR Spurious-free dynamic range f
I
= 20kHz 95 100 97 100 dB
(6)
THD Total harmonic distortion f
I
= 20kHz –96 –94 –98 –96 dB
f
I
= 20kHz 87 91 90 92 dB
SINAD Signal-to-(noise+distortion)
–60dB Input 30 32 dB
SNR Signal-to-noise ratio f
I
= 20kHz 88 92 91 93 dB
Full-power bandwidth
(7)
500 500 kHz
SAMPLING DYNAMICS
Aperture delay 5 5 ns
Transient response FS step 2 2 ms
Overvoltage recovery
(8)
150 150 ns
REFERENCE
Internal reference voltage No load 4.076 4.096 4.116 4.076 4.096 4.116 V
Internal reference source current
1 1 mA
(must use external buffer)
Internal reference drift 8 8 ppm/°C
External reference voltage range
3.9 4.096 4.2 3.9 4.096 4.2 V
for specified linearity
External reference current drain External 4.096V ref. 100 100 mA
(2) LSB means Least Significant Bit. For the ±10V input range, one LSB is 305mV.
(3) Typical rms noise at worst-case transitions and temperatures.
(4) As measured with circuit shown in Figure 29 and Figure 30.
(5) For bipolar input ranges, full-scale error is the worst case of –Full-Scale or +Full-Scale uncalibrated deviation from ideal first and last
code transitions, divided by the transition voltage (not divided by the full-scale range) and includes the effect of offset error. For unipolar
input ranges, full-scale error is the deviation of the last code transition divided by the transition voltage. It also includes the effect of
offset error.
(6) All specifications in dB are referred to a full-scale ±10V input.
(7) Full-power bandwidth is defined as the full-scale input frequency at which signal-to-(noise + distortion) degrades to 60dB.
(8) Recovers to specified performance after 2 x FS input overvoltage.
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