Datasheet

ADS8326
www.ti.com .................................................................................................................................................. SBAS343C –MAY 2007–REVISED SEPTEMBER 2009
DISSIPATION RATINGS
DERATING
FACTOR ABOVE T
A
≤ +25°C T
A
= +70°C T
A
= +85°C
PACKAGE R
θ JC
R
θ JA
T
A
= +25°C POWER RATING POWER RATING POWER RATING
DGK +39.1°C/W +206.3°C/W 4.847mW/°C 606mW 388mW 315mW
DRB +5°C/W +45.8°C/W 3.7mW/°C 370mW 204mW 148mW
RECOMMENDED OPERATING CONDITIONS
MIN TYP MAX UNIT
Supply voltage, GND to V
DD
Low-voltage levels 2.7 3.6 V
Supply voltage, GND to V
DD
5V logic levels 4.5 5.0 5.5 V
Reference input voltage 0.1 V
DD
V
–IN to GND –0.3 0 0.5 V
Analog input voltage +IN to GND –0.3 V
DD
+ 0.2 V
+IN – (–IN) 0 V
REF
V
Operating junction temperature, T
J
–40 +125 °C
ELECTRICAL CHARACTERISTICS: V
DD
= +5V
At –40°C to +85°C, V
REF
= +5V, –IN = GND, f
SAMPLE
= 250kHz, and f
DCLOCK
= 24 × f
SAMPLE
, unless otherwise noted.
ADS8326I ADS8326IB
PARAMETER TEST CONDITIONS MIN TYP MAX MIN TYP MAX UNIT
ANALOG INPUT
Full-scale range FSR +IN – (–IN) 0 V
REF
0 V
REF
V
Operating common-mode signal –0.3 0.5 –0.3 0.5 V
–IN = GND, off 5 5 GΩ
Input resistance R
ON
–IN = GND, on 50 100 50 100 Ω
Input capacitance –IN = GND, during sampling 48 48 pF
Input leakage current –IN = GND ±50 ±50 nA
Differential input capacitance +IN to –IN, during sampling 20 20 pF
FS sinewave, SINAD =
Full-power bandwidth FSBW 500 500 kHz
–60dB
DC ACCURACY
Resolution 16 16 Bits
No missing codes NMC 16 16 Bits
Integral linearity error INL –3 ±2 +3 –1.5 ±1 +1.5 LSB
Differential linearity error DNL –1 ±0.5 +2 –1 ±0.4 +1 LSB
Offset error V
OS
–1.5 ±0.75 +1.5 –1 ±0.5 +1 mV
Offset error drift TCV
OS
±0.2 ±0.2 ppm/°C
Gain error G
ERR
–24 +24 –12 +12 LSB
Gain error drift TCG
ERR
±0.3 ±0.3 ppm/°C
Noise 30 30 μVRMS
Power-supply rejection 4.75V ≤ V
DD
≤ 5.25V 0.5 0.5 LSB
SAMPLING DYNAMICS
Conversion time
t
CONV
24kHz ≤ f
DCLOCK
≤ 6MHz 2.667 666.7 2.667 666.7 μs
(16 DCLOCKs)
Acquisition time
t
AQ
f
DCLOCK
= 6MHz 0.75 0.75 μs
(4.5 DCLOCKs)
Throughput rate
250 250 kSPS
(22 DCLOCKs)
Clock frequency f
DCLOCK
0.024 6 0.024 6 MHz
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Product Folder Link(s): ADS8326