AN221E04 Datasheet – Dynamically Reconfigurable FPAA With Enhanced I/O
DS030100-U006a
- 7 -
Analog Inputs General
Parameter
Symbol
Min
Typ
Max
Unit
Comment
High Precision Input Range c
Vina
0.5
-
3.5
V
VMR +/- 1.5v
Standard precision Input Range d
Vina
0.1
-
3.9
V
VMR +/- 1.9v
High Precision
Differential Input c
Vdiffina
0
-
+/-3.0
V
Common mode voltage = 2 V
Standard Precision
Differential Input d
Vdiffina
0
-
+/-3.8
V
Common mode voltage = 2 V
Common Mode
Input Range
Vcm
1.8
2.0
2.2
V
Input Offset
Vos
-
5
15
mV
Non-chopper stabilized input
Input Frequency
Fain
0
<2
8
MHz
Max value is clock, CAM and input
stage dependant. Input frequency
is limited to approx <2MHz due to
CAM signal processing which is
based on sampled data
architectures.
c. High precision operating range provides optimal linearity and dynamic range.
d. Standard precision operating range provides maximum dynamic range and reduced linearity.
Input Differential Amplifier ON and filter OFF
Parameter
Symbol
Min
Typ
Max
Unit
Comment
Input Range
Vina
Vdiffina
See analog input above
Usable input range will be reduced
by the effective gain setting
Gain Setting
Ginamp
16
-
128
Gain Accuracy
-
1.0
2.5
%
Gain Drift (Temperature, Supply
Voltage zand Time)
Dist
-
-
1.0
%
Equivalent Input Offset Voltage
Vos
-
3
12
mV
Non-chopper stabilized input
When the input amplifier and filter
are used in combination Vos
contribution comes only from the
input amplifier
Offset Voltage Temperature
Coefficient
Voffsettc
-
1
10
µV/°C
from -40°C to 125°C
Input Frequency c
Fain
0
-
2
MHz
Input Frequency d
Fain
0
<2
8
MHz
Power Supply Rejection Ratio
PSRR
65
-
-
dB
d.c. Amp Gain =16
a.c. See graphs page 18
Common Mode Rejection Ratio
CMRR
-
67
-
dB
Large Signal Harmonic Distortion
Dist
-
-65
-
dB
0.4v p-p Differential input at 660Hz
Gain setting = 16
Input Resistance
Rin
10
-
Mohm
Input Capacitance
Cin
-
5.0
pF
Input Referred Noise Figure
NF
-
0.1
-
µV/sqrtHz
Input cell Gain = 16
Applies to audio frequency range
(400Hz to 30KHz).
See graphical data on page 18
Signal-to Noise Ratio and
Distortion
SINAD
-
75
-
dB
Input signal = 285 mV p-p diff,
audio frequency range
See graphical data on page 18
Spurious Free Dynamic Range
SFDR
-
73
-
dB
Input signal = 100 mV p-p diff
See graphical data on page 18
c. High precision operating range provides optimal linearity and dynamic range.
d. Standard precision operating range provides maximum dynamic range and reduced linearity.
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