X96012 Datasheet, PDF (7/27 Pages) Intersil Corporation – Universal Sensor Conditioner with Dual Look Up Table Memory and DACs

X96012
A/D CONVERTER CHARACTERISTICS (See pg. 4 for Standard Conditions).
Symbol
ADCTIME
Parameter
A/D converter conversion
time
RIN_ADC
CIN_ADC
VSense pin input
resistance
VSense pin input
capacitance
VIN_ADC
VSense input signal range
The ADC is monotonic
Offset_ADC
FSError_ADC
A/D converter offset error
A/D converter full scale
error
DNL_ADC
A/D Converter Differential
Nonlinearity
INL_ADC
A/D converter Integral
Nonlinearity
TempStep_ADC Temperature step causing
one step increment of ADC
output
Out25_ADC
ADC output at 25°C
Min
Typ
Max Unit
Test Conditions / Notes
9
ms Proportional to A/D converter
input voltage. This value is
maximum at full scale input
of A/D converter.
ADCfiltOff = “1”
100
kΩ VSense as an input,
ADCIN bit = “1”
1
7
pF VSense as an input,
ADCIN bit = “1”,
Frequency = 1 MHz
See note 3.
0
V(VRef) V This is the A/D Converter
Dynamic Range. ADCIN bit = “1”
±1
±1
±0.5
±1
0.52
0.55
LSB See notes 1 and 2
LSB
LSB
LSB
0.58 °C See note 3
01110101₂
[ ] Notes: 1. “LSB” is defined as V(VRef)/255, “Full Scale” is defined as V(VRef).
2. Offset_ADC: For an ideal converter, the first transition of its transfer curve occurs at
0.5 x V(VRef)
255
amount of deviation between the measured first transition point and the ideal point.
above zero. Offset error is the
[ ] ^{FSErrorADC: For an ideal converter, the last transition of its transfer curve occurs at}
amount of deviation between the measured last transition point and the ideal point,
254.5 x V(VRef) _{. Full Scale Error is the}
255
after subtracting the Offset from the measured curve.
DNL_ADC: DNL is defined as the difference between the ideal and the measured code transitions for successive A/D code outputs
expressed in LSBs. The measured transfer curve is adjusted for Offset and Fullscale errors before calculating DNL.
INL_ADC: The deviation of the measured transfer function of an A/D converter from the ideal transfer function. The INL error is also
defined as the sum of the DNL errors starting from code 00h to the code where the INL measurement is desired. The measured trans-
fer curve is adjusted for Offset and Fullscale errors before calculating INL.
3. These parameters are periodically sampled and not 100% tested.
7
FN8216.0
March 10, 2005