Datasheet
DISSIPATION RATINGS
ELECTRICAL CHARACTERISTICS
ADS1204
www.ti.com
........................................................................................................................................... SBAS301C – OCTOBER 2003 – REVISED FEBRUARY 2009
DERATING FACTOR
T
A
≤ +25 ° C ABOVE T
A
= T
A
= +70 ° C T
A
= +85 ° C T
A
= +105 ° C
PACKAGE POWER RATING +25 ° C
(1)
POWER RATING POWER RATING POWER RATING
QFN-32 (5 × 5) 3406mW 27.25mW/ ° C 2180mW 1771mW 1226mW
(1) This is the inverse of the traditional junction-to-ambient thermal resistance (R
θ JA
). Thermal resistances are not production tested and are
for informational purposes only.
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
RESOLUTION 16 Bits
DC ACCURACY
± 1 ± 3 LSB
INL Integral linearity error
(2)
± 0.001 ± 0.005 % FSR
± 6 LSB
Integral linearity match
± 0.009 % FSR
DNL Differential nonlinearity
(3)
± 1 LSB
V
OS
Input offset error – 1.4 ± 3 mV
Input offset error match ± 2 mV
TCV
OS
Input offset error drift ± 2 ± 8 µ V/ ° C
G
ERR
Gain error
(4)
Referenced to V
REF
± 0.08 ± 0.5 % FSR
Gain error match ± 0.185 ± 0.5 % FSR
TCG
ERR
Gain error drift ± 2 ppm/ ° C
PSRR Power-supply rejection ratio 4.75V < AV
DD
< 5.25V 78 dB
ANALOG INPUT
FSR Full-scale differential range (CH x+) – (CH x – ); CH x – = 2.5V ± 2.5 V
Specified differential range (CH x+) – (CH x – ); CH x – = 2.5V ± 2 V
Maximum operating input range
(3)
0 AV
DD
V
Input capacitance Common-mode 1.5 pF
Input leakage current CLK turned off ± 1 nA
Differential input resistance 100 k Ω
Differential input capacitance 2.5 pF
At DC 100 dB
CMRR Common-mode rejection ratio
V
IN
= ± 1.25V
PP
at 40kHz 110 dB
BW Bandwidth FS sine wave, – 3dB 50 MHz
SAMPLING DYNAMICS
Internal clock frequency CLKSEL = 1 8 10 12 MHz
CLKIN External clock frequency CLKSEL = 0 1 20 24 MHz
(1) All typical values are at T
A
= +25 ° C.
(2) Integral nonlinearity is defined as the maximum deviation of the line through the end points of the specified input range of the transfer
curve for CH x+ = – 2V to +2V at 2.5V, expressed either as the number of LSBs or as a percent of measured input range (4V).
(3) Specified by design.
(4) Maximum values, including temperature drift, are specified over the full specified temperature range.
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