Datasheet
ELECTRICAL CHARACTERISTICS: 250kSPS
ADS8365
SBAS362C – AUGUST 2006 – REVISED MARCH 2008 ....................................................................................................................................................
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Over recommended operating free-air temperature range at – 40 ° C to +85 ° C, AV
DD
= 5V, BV
DD
= 3V, V
REF
= internal +2.5V, f
CLK
= 5MHz, and
f
SAMPLE
= 250kSPS, unless otherwise noted
ADS8365
PARAMETER TEST CONDITIONS MIN TYP
(1)
MAX UNIT
ANALOG INPUT
Full-scale range FSR +IN – ( – IN) ± V
REF
V
Operating common-mode signal 2.2 2.8 V
Input resistance – IN = V
REF
750 Ω
Input capacitance – IN = V
REF
25 pF
Input leakage current – IN = V
REF
± 1 nA
Differential input resistance – IN = V
REF
1500 Ω
Differential input capacitance – IN = V
REF
15 pF
At dc 84 dB
Common-mode rejection ratio CMRR
V
IN
= ± 1.25V
PP
at 50kHz 80 dB
Bandwidth BW FS sinewave, – 3dB 10 MHz
DC ACCURACY
Resolution 16 Bits
No missing codes NMC 14 Bits
Integral linearity error INL ± 3 ± 8 LSB
Differential nonlinearity DNL Specified for 14 bit ± 1.5 LSB
Bipolar offset error V
OS
± 1 ± 2.3 mV
Bipolar offset error match Only pair-wise matching 0.2 1 mV
Bipolar offset error drift TCV
OS
0.8 ppm/ ° C
Gain error G
ERR
Referenced to V
REF
± 0.05 ± 0.25 %FSR
Gain error match Only pair-wise matching 0.005 0.05 %FSR
Gain error drift TCG
ERR
2 ppm/ ° C
Noise 60 µ Vrms
Power-supply rejection ratio PSRR 4.75V < AV
DD
< 5.25V – 87 dB
SAMPLING DYNAMICS
Conversion time per ADC t
CONV
50kHz ≤ f
CLK
≤ 5MHz 3.2 320 µ s
Acquisition time t
AQ
f
CLK
= 5MHz 800 ns
Throughput rate 250 kSPS
Aperture delay 5 ns
Aperture delay matching 100 ps
Aperture jitter 50 ps
Clock frequency 0.05 5 MHz
AC ACCURACY
Total harmonic distortion THD V
IN
= ± 2.5V
PP
at 50kHz – 94 dB
Spurious-free dynamic range SFDR V
IN
= ± 2.5V
PP
at 50kHz 95 dB
Signal-to-noise ratio SNR V
IN
= ± 2.5V
PP
at 10kHz 88 dB
Signal-to-noise + distortion SINAD V
IN
= ± 2.5V
PP
at 10kHz 87 dB
Channel-to-channel isolation 95 dB
Effective number of bits ENOB 14.3 Bits
(1) All typical values are at +25 ° C.
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