Datasheet

ADS8513
www.ti.com ...................................................................................................................................................... SLAS486C – JUNE 2007 – REVISED JANUARY 2009
ELECTRICAL CHARACTERISTICS (continued)
At T
A
= – 40 ° C to +85 ° C, f
S
= 40kSPS, V
S
= 5V, and using internal reference and fixed resistors, unless otherwise specified.
ADS8513I ADS8513IB
PARAMETER TEST CONDITIONS MIN TYP MAX MIN TYP MAX UNIT
DC ACCURACY
INL Integral linearity error – 3 3 – 2 2 LSB
(1)
DNL Differential linearity error – 2 3 – 1 2 LSB
No missing codes 15 16 Bits
Transition noise
(2)
0.6 0.6 LSB
Full-scale error
(3) (4)
– 0.5 0.5 – 0.25 0.25 %
Full-scale error drift 10 10 ppm/ ° C
Full-scale error
(3) (4)
External 2.5V reference – 0.5 0.5 – 0.25 0.25 %
Full-scale error drift External 2.5V reference 0.2 0.2 ppm/ ° C
Bipolar zero error
(3)
Bipolar ranges – 10 10 – 10 10 mV
Bipolar zero error drift Bipolar ranges 2.5 2.5 ppm/ ° C
Unipolar zero error
(3)
Unipolar ranges – 6 6 – 6 6 mV
Unipolar zero error drift Unipolar ranges 2.5 2.5 ppm/ ° C
Recovery time to rated accuracy from
1 µ F capacitor to CAP 300 300 µ s
power down
(5)
Power-supply sensitivity +4.75V < V
S
< +5.25V ± 8 ± 8 LSB
AC ACCURACY
SFDR Spurious-free dynamic range f
IN
= 1kHz, ± 10V 90 100 96 102 dB
(6)
THD Total harmonic distortion f
IN
= 1kHz, ± 10V – 98 – 90 – 100 – 96 dB
f
IN
= 1kHz, ± 10V 85 89 87 89
SINAD Signal-to-(noise+distortion) dB
-60 dB Input 30 32
SNR Signal-to-noise f
IN
= 1kHz, ± 10V 85 89 87 89 dB
Usable bandwidth
(7)
130 130 kHz
Full-power bandwidth ( – 3dB) 600 600 kHz
SAMPLING DYNAMICS
Aperture delay 40 40 ns
Aperture jitter 20 20 ps
Transient response FS step 5 5 µ s
Overvoltage recovery
(8)
750 750 ns
REFERENCE
Internal reference voltage No load 2.48 2.5 2.52 2.48 2.5 2.52 V
Internal reference source current (must
1 1 µ A
use external buffer)
Internal reference drift 8 8 ppm/ ° C
External reference voltage range for
2.3 2.5 2.7 2.3 2.5 2.7 V
specified linearity
External reference current drain External 2.5V ref 100 100 µ A
(1) LSB means Least Significant Bit. 1 LSB for the ± 10V input range is 305 µ V.
(2) Typical rms noise at worst case transitions.
(3) As measured with fixed resistors. Adjustable to zero with external potentiometer.
(4) Full-scale error is the worst case of – Full Scale or +Full Scale deviation from ideal first and last code transitions, divided by the full-scale
range; includes the effect of offset error. Tested at – 40 ° C to +85 ° C.
(5) Time delay after the ADS8513 is brought out of Power-Down mode until all internal settling occurs and the analog input is acquired to
rated accuracy. A Convert command after this delay will yield accurate results.
(6) All specifications in dB are referred to a full-scale input.
(7) Usable bandwidth defined as full-scale input frequency at which Signal-to-(Noise + Distortion) degrades to 60dB.
(8) Recovers to specified performance after 2 x FS input overvoltage.
Copyright © 2007 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 3
Product Folder Link(s): ADS8513