Datasheet

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      
    
SLAS198E − FEBRUARY 1999 − REVISED JUNE 2003
23
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range, V
CC
= V
REFP
= 2.7 V to
5.5 V, V
REFM
= 0 V, SCLK frequency = 20 MHz at 5 V, 15 MHz at 3 V (unless otherwise noted) (continued)
ac specifications
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SINAD Signal-to-noise ratio +distortion f
I
= 12 kHz at 200 KSPS C and I suffix 69 70 dB
THD Total harmonic distortion f
I
= 12 kHz at 200 KSPS −82 −76 dB
ENOB Effective number of bits f
I
= 12 kHz at 200 KSPS 11.6 Bits
SFDR Spurious free dynamic range f
I
= 12 kHz at 200 KSPS −84 −75 dB
Analog input
Full power-bandwidth, −3 dB 1 MHz
Full-power bandwidth, −1 dB 500 kHz
reference specifications
†
(0.1 µF and 10 µF between REFP and REFM pins)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Positive reference input voltage, REFP V
CC
= 2.7 V to 5.5 V 2 V
CC
V
Negative reference input voltage, REFM V
CC
= 2.7 V to 5.5 V 0 2 V
V
CC
= 5.5 V
CS = 1, SCLK = 0, (off) 100 MΩ
Reference Input impedance
V
CC
= 5.5 V
CS = 0, SCLK = 20 MHz (on) 20 25 kΩ
Reference Input impedance
V
CC
= 2.7 V
CS = 1, SCLK = 0 (off) 100 MΩ
V
CC
= 2.7 V
CS = 0, SCLK = 15 MHz (on) 20 25 kΩ
Reference Input voltage difference, REFP−REFM V
CC
= 2.7 V to 5.5 V 2 V
CC
V
V
CC
= 5.5 V VREF SELECT = 4 V 3.85 4 4.15 V
Internal reference voltage, REFP−REFM
V
CC
= 5.5 V VREF SELECT = 2 V 1.925 2 2.075 V
Internal reference voltage, REFP−REFM
V
CC
= 2.7 V VREF SELECT = 2 V 1.925 2 2.075 V
Internal reference start-up time V
CC
= 5.5 V, 2.7 V with 10 µF compensation cap 20 ms
Internal reference temperature coefficient V
CC
= 2.7 V to 5.5 V 16 40
†
PPM/°C
†
Specified by design