A2F500M3G-CSG288 Datasheet, PDF (93/197 Pages) Microsemi Corporation – SmartFusion Customizable System-on-Chip (cSoC)

SmartFusion Customizable System-on-Chip (cSoC)
Table 2-95 • ADC Specifications (continued)
Specification
Input leakage current
Power supply rejection ratio
Test Conditions
–40°C to +100°C
DC
Min. Typ. Max.
1
44 53
ADC power supply operational current VCC33ADCx
2.5
requirements
VCC15A
2
Note: All 3.3 V supplies are tied together and varied from 3.0 V to 3.6 V. 1.5 V supplies are held constant.
Units
µA
dB
mA
mA
Analog Bipolar Prescaler (ABPS)
With the ABPS set to its high range setting (GDEC = 00), a hypothetical input voltage in the range –15.36
V to +15.36 V is scaled and offset by the ABPS input amplifier to match the ADC full range of 0 V to 2.56
V using a nominal gain of –0.08333 V/V. However, due to reliability considerations, the voltage applied to
the ABPS input should never be outside the range of –11.5 V to +14.4 V, restricting the usable ADC input
voltage to 2.238 V to 0.080 V and the corresponding 12-bit output codes to the range of 3581 to 128
(decimal), respectively.
Unless otherwise noted, ABPS performance is specified at 25°C with nominal power supply voltages,
with the output measured using the internal voltage reference with the internal ADC in 12-bit mode and
100 KHz sampling frequency, after trimming and digital compensation; and applies to all ranges.
Table 2-96 • ABPS Performance Specifications
Specification
Test Conditions
Input voltage range (for driving ADC GDEC[1:0] = 11
over its full range)
GDEC[1:0] = 10
GDEC[1:0] = 01
GDEC[1:0] = 00 (limited by
maximum rating)
Analog gain (from input pad to ADC GDEC[1:0] = 11
input)
GDEC[1:0] = 10
GDEC[1:0] = 01
GDEC[1:0] = 00
Gain error
–40ºC to +100ºC
Min.
–2.8
–2.8
Typ.
±2.56
±5.12
±10.24
See note 1
–0.5
–0.25
–0.125
–0.0833
–0.4
–0.4
Max.
0.7
0.7
Units
V
V
V
V
V/V
V/V
V/V
V/V
%
%
Note:
*FS is full-scale error, defined as the difference between the actual value that triggers the transition to full-scale
and the ideal analog full-scale transition value. Full-scale error equals offset error plus gain error. Refer to the
Analog-to-Digital Converter chapter of the SmartFusion Programmable Analog User’s Guide for more
information.
Revision 12
2- 81