[Openeeg-list] Programmable system on a chip instrimentation amp is it good for a eeg?

[joshua w. <jos...@ya...>]

www.cypress.com made a Programmable system on a chip
this programable analog and digital circuit with CPU
has a instrimentation amp is it good for a eeg? Here
are the specs from the data sheet I took from the
setup program.
This circuit can also be tuned by software and can be
programed on a 30 or 60 dollar dev kit.
The software can be downloaded free.

DC and AC Electrical Characteristics
CY8C29/27/24/22xxx Preliminary Specification: Three
OpAmp Topology
The following values are indicative of expected
performance and based on initial characterization
data.
Unless otherwise specified in the following tables, TA
= 25°C, Vdd = 5.0V, output referenced to Analog
Ground = 2*VBandGap.
Three Op Amp DC 5.0V Electrical Characteristics
Parameter Typical Limit Units Conditions and Notes
Gain
Deviation from Nominal at G=93.0 1.2 %
Deviation from Nominal at G=48.0 1.4 %
Deviation from Nominal at G=2.0 0.2 %
Deviation from Nominal at G=1.0 0.2 %
Input
Input Offset Voltage 3.5 mV
Input Voltage Range -- Vss to Vdd V
Leakage1 1 -- nA
Input Capacitance1 3 -- pF
CMRR 60 dB Gain = 48
PSRR 42 dB
Output Swing 0.05 to Vdd-0.05 -- V
Operating Current
Low Power 800 µA Operating current may be
reduced by 50% if Op-Amp
Bias is set to Low, but column
clock must be reduced.
Med Power 3,000 µA
High Power 11,900 µA
Three OpAmp AC 5.0V Electrical Characteristics
Parameter Typical Limit Units Conditions and Notes
Slew Rate (20% to 80%)2
Low Power 0.5 V/µsec Gain=2.0, 2.0V step at input
Med Power 1.9 V/µsec
High Power 6.0 V/µsec
Settling Time2
Low Power 11 µsec
Med Power 4 µsec
High Power 3 µsec
Noise2 Referred to input
Low Power 625 nV/?Hz Differential stage gain=4.
OpAmp bias low except at
High Power.
Med Power 198 nV/?Hz
High Power 175 nV/?Hz
The following values are indicative of expected
performance and based on initial characterization
data.
Unless otherwise specified in the following tables, TA
= 25°C, Vdd = 3.3V, output referenced to Analog
Ground = Vdd/2.
Electrical Characteristics Notes
1. Includes I/O pin.
Three Op Amp DC 3.3V Electrical Characteristics
Parameter Typical Limit Units Conditions and Notes
Gain
Deviation from Nominal at G=93.0 1.9 %
Deviation from Nominal at G=48.0 2.1 %
Deviation from Nominal at G=2.0 0.1 %
Deviation from Nominal at G=1.0 0.1 %
Input
Input Offset Voltage 3.5 mV
Input Voltage Range -- Vss to Vdd V
Leakage1 1 -- nA
Input Capacitance1 3 -- pF
CMRR 51 dB Gain = 48
PSRR 42 dB
Output Swing 0.05 to Vdd-0.05 -- V
Operating Current
Low Power 1200 µA Operating current may be
reduced by 50% if Op-Amp
Bias is set to Low, but column
clock must be reduced.
Med Power 3,400 µA
High Power 12,000
Three OpAmp AC 3.3V Electrical Characteristics
Parameter Typical Limit Units Conditions and Notes
Slew Rate (20% to 80%)2
Low Power 0.5 V/µsec Gain=2.0, 2.0V step at input
Med Power 1.8 V/µsec
High Power 5.7 V/µsec
Settling Time2
Low Power 12 µsec
Med Power 4 µsec
High Power 3 µsec
Noise2 Referred to input
Low Power 625 nV/?Hz OpAmp bias low except at
High Power. Med Power 198 nV/?Hz
High Power 175 nV/?Hz


		
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