Datasheet

ADC08831, ADC08832
www.ti.com SNAS015C –SEPTEMBER 1999–REVISED MARCH 2013
Dynamic Characteristics
The following specifications apply for V
CC
= 5V, f
CLK
= 2MHz, T
A
= 25°C, R
SOURCE
= 50Ω, f
IN
= 45kHz, V
IN
= 5V
P
, V
REF
= 5V,
non-coherent 2048 samples with windowing.
Symbol Parameter Conditions Typical
(1)
Limits
(2)
Units (Limits)
f
S
Sampling Rate ADC08831 f
CLK
/11 181 ksps
ADC08832 f
CLK
/13
(3)
153 ksps
SNR Signal-to -Noise Ratio
(4)
48.5 dB
THD Total Harmonic Distortion
(5)
−59.5 dB
SINAD Signal-to -Noise and Distortion 48.0 dB
ENOB Effective Number Of Bits
(6)
7.7 Bits
SFDR Spurious Free Dynamic Range 62.5 dB
(1) Typicals are at T
J
= 25°C and represent the most likely parametric norm.
(2) Specified to TI's AOQL (Average Outgoing Quality Level).
(3) The maximum sampling rate is slightly less than f
CLK
/11 if CS is reset in less than one clock period.
(4) The signal-to-noise ratio is the ratio of the signal amplitude to the background noise level. Harmonics of the input signal are not included
in it's calculation.
(5) The contributions from the first 6 harmonics are used in the calculation of the THD.
(6) Effective Number Of Bits (ENOB) is calculated from the measured signal-to-noise plus distortion ratio (SINAD) using the equation ENOB
= (SINAD-1.76)/6.02.
Block Diagram
*For ADC08831 V
REF
pin is available, for ADC08832 DI pin is available, and V
REF
is tied to V
CC
Pin names in parentheses refer to ADC08832
Copyright © 1999–2013, Texas Instruments Incorporated Submit Documentation Feedback 5
Product Folder Links: ADC08831 ADC08832