a2f500m3b-1csh484 Actel Corporation, a2f500m3b-1csh484 Datasheet - Page 95

• Manufacturer Part Number: a2f500m3b-1csh484
• Description: Actel
• Manufacturer: Actel Corporation

Table 2-93 • ABPS Performance Specifications
Specification
Input voltage range (for driving ADC
over its full range)
Analog gain (from input pad to ADC
input)
Gain error
Input referred offset voltage
SINAD
Non-linearity
Effective number of bits (ENOB)
Large-signal bandwidth
Analog settling time
Input resistance
ENOB
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.
=
SINAD 1.76 dB
-------------------------------------------- -
6.02 dB/bit
–
EQ 11
GDEC[1:0] = 11
GDEC[1:0] = 10
GDEC[1:0] = 01
GDEC[1:0]
maximum rating)
GDEC[1:0] = 11
GDEC[1:0] = 10
GDEC[1:0] = 01
GDEC[1:0] = 00
GDEC[1:0] = 11
GDEC[1:0] = 10
GDEC[1:0] = 01
GDEC[1:0] = 00
RMS deviation from BFSL
GDEC[1:0] = 11
(±2.56 range), –1 dBFS input
–1 dBFS input
To 0.1% of final value (with ADC
load)
12-bit mode 10 KHz
12-bit mode 100 KHz
10-bit mode 10 KHz
10-bit mode 100 KHz
8-bit mode 10 KHz
8-bit mode 100 KHz
Test Conditions
=
R e v i s i o n 3
00
(limited
Actel SmartFusion Intelligent Mixed Signal FPGAs
by
Min.
See note 1
–0.0833
±10.24
–0.125
±2.56
±5.12
–0.25
Typ.
–0.5
–3.8
–7.5
–15
–22
9.8
9.8
9.2
9.2
7.8
7.8
±1
60
1
1
0.5
Max.
10
Units
% FR
MHz
V/V
V/V
V/V
V/V
Bits
Bits
Bits
Bits
Bits
Bits
MΩ
mV
mV
mV
mV
dB
µs
%
V
V
V
V
2- 83