Datasheet

ELECTRICAL CHARACTERISTICS
ADS8329
ADS8330
www.ti.com ................................................................................................................................................... SLAS516C – DECEMBER 2006 – REVISED JULY 2009
T
A
= – 40 ° C to 85 ° C, +VA = 4.5 V to 5.5 V, +VBD = 1.65 V to 5.5 V, V
REF
= 5 V, and f
SAMPLE
= 1 MHz, unless otherwise noted.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
ANALOG INPUT
Full-scale input voltage
(1)
+IN – ( – IN) or (+INx – COM) 0 +V
REF
V
+IN, +IN0, +IN1 AGND – 0.2 +VA + 0.2
Absolute input voltage V
– IN or COM AGND – 0.2 AGND + 0.2
Input capacitance 40 45 pF
No ongoing conversion,
Input leakage current – 1 1 nA
dc input
At dc 109
Input channel isolation, ADS8330 only dB
V
I
= ± 1.25 V
PP
at 50 kHz 101
SYSTEM PERFORMANCE
Resolution 16 Bits
No missing codes 16 Bits
ADS8329IB, ADS8330IB – 1.75 ± 1.2 1.75
Integral
INL LSB
(2)
linearity
ADS8329I, ADS8330I – 2.5 ± 1.5 2.5
ADS8329IB, ADS8330IB – 1 ± 0.4 1
Differential
DNL LSB
(2)
linearity
ADS8329I, ADS8330I – 1 ± 0.5 2
ADS8329IB, ADS8330IB – 1 ± 0.27 1
E
O
Offset error
(3)
mV
ADS8329I, ADS8330I – 1.25 ± 0.8 1.25
Offset error drift FSR = 5 V +0.4 ppm/ ° C
E
G
Gain error – 0.25 – 0.04 0.25 %FSR
Gain error drift +0.75 ppm/ ° C
At dc 70
CMRR Common-mode rejection ratio dB
V
I
= 0.4 V
PP
at 1 MHz 50
Noise 33 µ V RMS
PSRR Power-supply rejection ratio At FFFFh output code
(3)
78 dB
SAMPLING DYNAMICS
t
CONV
Conversion time 18 CCLK
t
SAMPLE1
Manual trigger 3
Acquisition time CCLK
t
SAMPLE2
Auto trigger 3
Throughput rate 1 MHz
Aperture delay 5 ns
Aperture jitter 10 ps
Step response 100 ns
Overvoltage recovery 100 ns
(1) Ideal input span; does not include gain or offset error.
(2) LSB means least significant bit.
(3) Measured relative to an ideal full-scale input [+IN – ( – IN)] of 4.096 V when +VA = 5 V.
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