User`s guide

Elan Digital Systems Ltd. 40 AD125 USER’S GUIDE
5.2 ANALOGUE
• ALL PARAMETERS @ 25°C (UNLESS STATED)
• “S/W” DENOTES SOFTWARE CONFIGURABLE
• SPECIFICATIONS LISTED FOR AD1xx ALSO APPLY TO MF2xx EQUIVALENT
AD125, AD126, AD121
INPUT CHANNELS: 8 SINGLE ENDED OR 4 DIFFERENTIAL (S/W)
AD135, AD136, AD132, AD131
INPUT CHANNELS: 16 SINGLE ENDED OR 8 DIFFERENTIAL (S/W)
INPUT RANGES: UNIPOLAR: 0 to 1.25V, 2.5V, 3.75V, 5.0V, 6.25V,
7.5V, 8.75V, 10.0V (S/W)
BIPOLAR: +/-0.625V, 1.25V, 1.875V, 2.5V, 3.125V,
3.75V, 4.375V, 5.0V, 5.625V, 6.25V, 6.875V, 7.5V,
8.125V, 8.75V, 9.375V, 10.0V (S/W)
UNIPOLAR/BIPOLAR IS S/W CONFIGURABLE
GAIN ACCURACY: 1% NOMINAL ACCURACY, 55ppm/oC DRIFT
RESOLUTION: 12 BITS (11.2 AT NYQUIST)
SAMPLE RATES: FROM 305SPS TO 500KSPS (AD125 & AD135) OR
625KSPS (AD126 & AD136) OR 250KSP (AD132) OR
100KSPS (AD121/131) (PROGRAMMABLE)
IN SINGLE SHOT MODE SAMPLE RATES BELOW
305SPS ARE POSSIBLE.
CHANNEL SCAN RATE
(AD1x5 AD1x6): i) 500KSPS “BEST” CASE (SMALL SIGNAL
VARIATIONS CHANNEL TO CHANNEL, 5 LSB
SETTLING ALLOWANCE)
ii) 350KSPS “MID” CASE (LARGE SIGNAL
VARIATIONS CHANNEL TO CHANNEL, 5 LSB
SETTLING ALLOWANCE)
iii) 250KSPS WORST CASE (LARGE SIGNAL
VARIATIONS CHANNEL TO CHANNEL, 1/2 LSB
SETTLING ALLOWANCE)
REF CLOCK: 10MHz ± 0.5% INITIAL TOLERANCE
AtoD DNL: ±1.0 LSB TYP
AtoD INL: ±1.0 LSB TYP
REFERENCE TEMPCO: ±45ppm/°C MAX
INPUT PROTECTION: ±35V WITH CARD POWERED OR UNPOWERED
AD1x5, AD1x6
INPUT IMPEDANCE: > 10Meg ohms FOR Fin < 250KHz (SINGLE ENDED)