Datasheet
ADS1204
SBAS301C – OCTOBER 2003 – REVISED FEBRUARY 2009 ...........................................................................................................................................
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
Over recommended operating free-air temperature range at – 40 ° C to +105 ° C, AV
DD
= 5V, BV
DD
= 3V, CH x+ = 0.5V to 4.5V,
CH x – = 2.5V, REFIN = REFOUT = internal +2.5V, CLKIN = 20MHz, and 16-bit Sinc
3
filter with decimation by 256, unless
otherwise noted.
ADS1204
PARAMETER TEST CONDITIONS MIN TYP
(1)
MAX UNIT
AC ACCURACY
V
IN
= ± 2V
PP
at 5kHz;
– 96 – 88 dB
– 40 ° C ≤ T
A
≤ +85 ° C
THD Total harmonic distortion
V
IN
= ± 2V
PP
at 5kHz;
– 96 – 87 dB
– 40 ° C ≤ T
A
≤ +105 ° C
SFDR Spurious-free dynamic range V
IN
= ± 2V
PP
at 5kHz 92 100 dB
SNR Signal-to-noise ratio V
IN
= ± 2V
PP
at 5kHz 86 89 dB
SINAD Signal-to-noise + distortion V
IN
= ± 2V
PP
at 5kHz 85 89 dB
Channel-to-channel isolation
(5)
V
IN
= ± 2V
PP
at 50kHz 85 dB
ENOB Effective number of bits 14 14.5 Bits
VOLTAGE REFERENCE OUTPUT
V
OUT
Reference voltage output 2.450 2.5 2.550 V
dV
OUT
/dT Output voltage temperature drift ± 20 ppm/ ° C
f = 0.1Hz to 10Hz, C
L
= 10 µ F 10 µ Vrms
Output voltage noise
f = 10Hz to 10kHz, C
L
= 10 µ F 12 µ Vrms
PSRR Power-supply rejection ratio 60 dB
I
OUT
Output current 10 µ A
I
SC
Short-circuit current 0.5 mA
Turn-on settling time to 0.1% at C
L
= 0 100 µ s
VOLTAGE REFERENCE INPUT
V
IN
Reference voltage input 0.5 2.5 2.6 V
Reference input resistance 100 M Ω
Reference input capacitance 5 pF
Reference input current 1 µ A
DIGITAL INPUTS
(6)
Logic family CMOS with Schmitt Trigger
V
IH
High-level input voltage 0.7 × BV
DD
BV
DD
+ 0.3 V
V
IL
Low-level input voltage – 0.3 0.3 × BV
DD
V
I
IN
Input current V
I
= BV
DD
or GND ± 50 nA
C
I
Input capacitance 5 pF
DIGITAL OUTPUTS
(6)
Logic family CMOS
V
OH
High-level output voltage BV
DD
= 4.5V, I
OH
= – 100 µ A 4.44 V
V
OL
Low-level output voltage BV
DD
= 4.5V, I
OL
= +100 µ A 0.5 V
C
O
Output capacitance 5 pF
C
L
Load capacitance 30 pF
Data format Bit stream
(5) Specified by design.
(6) Applicable for 5.0V nominal supply: BV
DD
(min) = 4.5V and BV
DD
(max) = 5.5V.
4 Submit Documentation Feedback Copyright © 2003 – 2009, Texas Instruments Incorporated
Product Folder Link(s): ADS1204