PSoC® Creator™ Component Data Sheet
Trans-Impedance Amplifier (TIA)
1.50
Features
•
Selectable conversion gain
•
Selectable corner frequency
•
Compensated for capacitive input sources
•
Adjustable power settings
•
Settable input reference voltage
General Description
The Trans-Impedance Amplifier (TIA) component provides an opamp-based current to voltage
conversion amplifier with resistive gain and user-selected bandwidth. It is derived from the
SC/CT block.
The TIA is used to convert an external current to a voltage. Typical applications include the
measurement of sensors with current outputs such as photo-diodes. The conversion gain of the
TIA is expressed in ohms, with the available range between 20k and 1.0 Megohms. Current
output sensors, such as photo-diodes often have substantial output capacitance. This requires
shunt feedback capacitance in the TIA in order to guarantee stability. The TIA has a
programmable feedback capacitor to meet this need and provide bandwidth limiting to reduce
broadband noise.
Input/Output Connections
This section describes the various input and output connections for the TIA. An asterisk (*) in the
list of I/Os indicates that the I/O may be hidden on the symbol under the conditions listed in the
description of that I/O.
Iin – Analog
The Iin is the input signal terminal. The Iin is the sum of currents from the global inputs, which
may include signals from a current output DAC.
Note This terminal name is Iin (capital i) not lin (lowercase l).
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Cypress Semiconductor Corporation • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600
Document Number: 001-61483 Rev. **
Revised August 11, 2010
Trans-Impedance Amplifier (TIA)
PSoC® Creator™ Component Data Sheet
Vref – Analog
Vref is the input terminal for a reference signal. The reference may be an internal reference,
internal VDAC value, or external signal.
Vout – Analog
Vout is the output signal terminal. Vout is determined by the following equation, where Rfb is
resistive feedback:
Vout = Vref − Iin * Rfb
Equation 1
Positive (from source) currents result in output voltage, which is negative with respect to Vref.
Negative (into source) currents result in output voltage, which is positive with respect to Vref.
Parameters and Setup
Drag a TIA component onto your design and double-click it to open the Configure dialog.
Figure 1: Configure TIA Dialog
Capacitive Feedback
This sets the capacitive feedback for the TIA. The capacitive feedback can be set to None,
1.3 pF, 3.3 pF, or 4.6 pF (default). The -3 dB frequency for the TIA is calculated from the product
of the values of resistive and capacitive feedback components.
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PSoC® Creator™ Component Data Sheet
Trans-Impedance Amplifier (TIA)
Minimum_Vdda
This parameter is determined by the minimum analog supply voltage expected for the PSoC in
the design. The parameter can be set to one of two values:
•
2.7 V or greater (default)
•
Less than 2.7 V
For an analog supply voltage below 2.7 V, the amplifier makes use of an internal boost circuit.
The component implementation uses an additional 10 MHz clock to drive the boost circuit for the
amplifier block.
Power
This sets the initial drive power of the TIA. The power determines the speed with which the TIA
reacts to changes in the input signal. There are four power settings; Minimum, Low, Medium
(default), and High. Minimum Power setting results in the slowest response time and High Power
the fastest. Minimum and Low Power settings have reduced drive currents and are not suitable
for the lower values of feedback resistor.
Resistive Feedback
This sets the nominal resistive feedback for the TIA. The resistive feedback may be selected
from the following set of allowed values (in ohms): 20k (default), 30k, 40k, 80k, 120k, 250k,
500k, and 1000k.
Placement
There are no placement specific options.
Resources
The TIA uses one SC/CT block. Typically, the Vref input is routed from a voltage reference, a
VDAC output or an externally supplied reference on a GPIO.
Application Programming Interface
Application Programming Interface (API) routines allow you to configure the component using
software. The following table lists and describes the interface to each function. The subsequent
sections cover each function in more detail.
By default, PSoC Creator assigns the instance name "TIA_1" to the first instance of a component
in a given design. You can rename it to any unique value that follows the syntactic rules for
identifiers. The instance name becomes the prefix of every global function name, variable, and
constant symbol. For readability, the instance name used in the following table is "TIA".
PRELIMINARY
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Trans-Impedance Amplifier (TIA)
PSoC® Creator™ Component Data Sheet
Function
Description
void TIA_Init(void)
Initializes or restores default TIA configuration.
void TIA_Enable(void)
Enables the TIA.
void TIA_Start(void)
Power up the TIA.
void TIA_Stop(void)
Power down the TIA.
void TIA_SetPower(uint8 power)
Set drive power to one of four levels.
void TIA_SetResFB(uint8 res_feedback)
Set the resistive feedback to one of 8 values.
void TIA_SetCapFB(uint8 cap_feedback)
Set the capacitive feedback to one of 4 values.
void TIA_Sleep(void)
Stops and saves the user configurations.
void TIA_Wakeup(void)
Restores and enables the user configurations.
void TIA_SaveConfig(void)
Empty function. Provided for future usage.
void TIA_RestoreConfig(void)
Empty function. Provided for future usage.
Global Variables
Variable
TIA_initVar
Description
Indicates whether the TIA has been initialized. The variable is initialized to 0 and set to 1 the first
time TIA_Start() is called. This allows the component to restart without reinitialization after the
first call to the TIA_Start() routine.
If reinitialization of the component is required, then the TIA_Init() function can be called before
the TIA_Start() or TIA_Enable() function.
void TIA_Init(void)
Description:
Initializes or restores default TIA configuration.
Parameters:
None
Return Value:
None
Side Effects:
All registers will be reset to their initial values. This will re-initialize the component.
void TIA_Enable(void)
Description:
Enables the TIA.
Parameters:
None
Return Value:
None
Side Effects:
None
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PSoC® Creator™ Component Data Sheet
Trans-Impedance Amplifier (TIA)
void TIA_Start(void)
Description:
Performs all of the required initialization for the component and enables power to the
amplifier. The first time the routine is executed, the resistive and capacitive feedback and
amplifier power are set based on the values provided during the configuration. When called to
restart the TIA following a TIA_Stop() call, the current component parameter settings are
retained.
Parameters:
None
Return Value:
None
Side Effects:
None
void TIA_Stop(void)
Description:
Turn off the TIA block.
Note This API is not recommended for use on PSoC 3 ES2 and PSoC 5 ES1 silicon. These
devices have a defect that causes connections to several analog resources to be unreliable
when not powered. The unreliability manifests itself in silent failures (e.g. unpredictably bad
results from analog components) when the component utilizing that resource is stopped. It is
recommended that all analog components in a design should be powered up (by calling the
<INSTANCE_NAME>_Start() APIs) at all times. Do not call the <INSTANCE_NAME>_Stop()
APIs.
Parameters:
None
Return Value:
None
Side Effects:
Does not affect power, resistive or capacitive feedback settings
void TIA_SetPower(uint8 power)
Description:
Sets the drive power to one of four settings; minimum, low, medium, or high.
Parameters:
(uint8) power: See the following table for valid power settings.
Power Setting
Notes
TIA_MINPOWER
Minimum active power and slowest reaction time.
TIA_LOWPOWER
Low power and speed.
TIA_MEDPOWER
Medium power and speed.
TIA_HIGHPOWER
Highest active power and fastest reaction time.
Return Value:
None
Side Effects:
None
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Trans-Impedance Amplifier (TIA)
PSoC® Creator™ Component Data Sheet
(void) TIA_SetResFB(uint8 res_feedback)
Description:
Set the amplifier resistive feedback value.
Parameters:
uint8 res_feedback: See table below for valid resistive feedback settings.
Gain Setting
Notes
TIA_RES_FEEDBACK_20K
Feedback resistor = 20k
TIA_RES_FEEDBACK_30K
Feedback resistor = 30k
TIA_RES_FEEDBACK_40K
Feedback resistor = 40k
TIA_RES_FEEDBACK_80K
Feedback resistor = 80k
TIA_RES_FEEDBACK_120K
Feedback resistor = 120k
TIA_RES_FEEDBACK_250K
Feedback resistor = 250k
TIA_RES_FEEDBACK_500K
Feedback resistor = 500k
TIA_RES_FEEDBACK_1000K
Feedback resistor = 1000k
Return Value:
None
Side Effects:
None
(void) TIA_SetCapFB(uint8 cap_feedback)
Description:
Set the amplifier capacitive feedback value.
Parameters:
uint8 cap_feedback: See table below for valid capacitive feedback settings.
Gain Setting
Notes
TIA_CAP_FEEDBACK_NONE
No capacitive feedback
TIA_CAP_FEEDBACK_1_3PF
Feedback capacitor = 1.3 pF
TIA_CAP_FEEDBACK_3_3PF
Feedback capacitor = 3.3 pF
TIA_CAP_FEEDBACK_4_6PF
Feedback capacitor = 4.6 pF
Return Value:
None
Side Effects:
None
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PSoC® Creator™ Component Data Sheet
Trans-Impedance Amplifier (TIA)
void TIA_Sleep(void)
Description:
Stops the component operation. Saves the configuration registers and the component enable
state. Should be called just prior to entering sleep.
Parameters:
None
Return Value:
None
Side Effects:
None
void TIA_Wakeup(void)
Description:
Restores the component enable state and configuration registers. Should be called just after
awaking from sleep.
Parameters:
None
Return Value:
None
Side Effects:
None
void TIA_SaveConfig(void)
Description:
Empty function. Provided for future usage.
Parameters:
None
Return Value:
None
Side Effects:
None
void TIA_RestoreConfig(void)
Description:
Empty function. Provided for future usage.
Parameters:
None
Return Value:
None
Side Effects:
None
PRELIMINARY
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Trans-Impedance Amplifier (TIA)
PSoC® Creator™ Component Data Sheet
Sample Firmware Source Code
The following is a C language example demonstrating the basic functionality of the TIA
component. This example assumes the component has been placed in a design with the default
name "TIA_1."
Note If you renamed your component you must also edit the example code as appropriate to
match the component name you specified; otherwise, this example code will not work.
If the TIA component will be used with the parameter settings configured during the project
design phase, only a call to the associated TIA Start() routine is required to use this component.
#include <device.h>
void main()
{
TIA_1_Start();
}
The remaining TIA component API routines can be used to change the component parameter
settings at runtime.
#include <device.h>
void main()
{
TIA_1_Start();
TIA_1_SetResFB(TIA_1_RES_FEEDBACK_250K);
TIA_1_SetCapFB(TIA_1_CAP_FEEDBACK_4_6PF);
TIA_1_SetPower(TIA_1_MEDPOWER);
}
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PSoC® Creator™ Component Data Sheet
Trans-Impedance Amplifier (TIA)
Functional Description
The TIA is constructed from a generic SC/CT block. The topology is an opamp with a selectable
feedback resistor from the output to the inverting input. Optionally a selectable feedback
capacitor can also be connected between the output and the inverting input. See the following for
TIA configurations.
Figure 2: TIA Configurations
The output voltage is controlled by adjusting the Rfb feedback resistor. (See the following figure.)
Rfb may be set to one of 8 values, between 20k and 1000k ohms, selectable in either the
parameter dialog or the using the SetResFB() API function.
Figure 3: TIA Schematic
The DC output level can be adjusted by adding current to the Iin terminal. Positive current (into
the terminal) pushes the output negative; negative current (pulling current from the terminal)
pushes the output positive. The source of the current may be an internal DAC.
The amplifier bandwidth is determined by the interaction between the feedback resistor Rfb and
the selection of the capacitor in parallel with Rfb. The capacitive feedback value Cfb can be set
to one of four values in either the parameter dialog or by using the SetCapFB() API function.
The -3 dB frequency for the amplifier is:
Freq − 3dB = 1 /(2πR fbC fb
Equation 2
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Trans-Impedance Amplifier (TIA)
PSoC® Creator™ Component Data Sheet
The following table shows the minimum capacitive feedback values that can be used with each
power setting and still guarantee TIA circuit stability.
Power Setting
Minimum
Capacitive Feedback
Units
Minimum Power
pF
Low Power
pF
Medium Power
pF
High Power
pF
Conditions and Notes
DC and AC Electrical Characteristics
The following values are indicative of expected performance and based on initial characterization
data. Unless otherwise specified in the tables below, all TA = 25°C, Vdda = 5.0V, Power HIGH,
Op-Amp bias LOW, output referenced to 1.024V.
Note Characteristic data table will be updated following silicon characterization.
5.0 V/3.3 V DC Electrical Characteristics
Parameter
Description
Conditions
Min
Typ
Max
Units
Rconv20
20 kΩ
14
20
28
kΩ
Rconv30
30 kΩ
21
30
42
kΩ
Rconv40
40 kΩ
28
40
56
kΩ
Rconv80
80 kΩ
56
80
112
kΩ
Rconv120
120 kΩ
84
120
168
kΩ
Rconv250
250 kΩ
175
250
350
kΩ
Rconv500
500 kΩ
350
500
700
kΩ
Rconv1000
1000 kΩ
700
1000
1400
kΩ
TCRconv
Temp coefficient
conversion
resistance
Rconv=120k
na
tbc
tbc
ppm/deg C
Vos
Input Offset Voltage
Vdda=3.3 V, 25 C, P=Min
na
tbc
tbc
mV
Vdda=3.3 V, 25 C, P=Low
na
tbc
tbc
mV
Vdda=3.3 V, 25 C, P=Med
na
tbc
tbc
mV
Vdda=3.3 V, 25 C, P=High
na
tbc
tbc
mV
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PSoC® Creator™ Component Data Sheet
Parameter
TCVos
Description
Temp coefficient
Input Offset Voltage
Trans-Impedance Amplifier (TIA)
Conditions
Min
Typ
Max
Units
P=Min
na
tbc
tbc
uV/deg C
(abs value)
P=Low
na
tbc
tbc
uV/deg C
(abs value)
P=Med
na
tbc
tbc
uV/deg C
(abs value)
P=High
na
tbc
tbc
uV/deg C
(abs value)
Rin
Input resistance
Reference input
na
10
na
Meg ohms
Cin
Input capacitance
Reference input (routing dependent)
na
tbc
tbc
pF
PSRR
Power supply
rejection ratio
Iin=0
tbc
tbc
Idda
Operating current
Vdda=1.71 V, P=Min
tbc
tbc
Vdda=5.0 V, P=High
tbc
tbc
dB
uA
Figures
Histogram offset voltage 100 parts, 4 per part
T=25C, P=High
X axis mV
Y axis % in bins
Voffset vs temperature, Vdda=5.0V,
P=High
X axis: temp -40 to 85 C
Y axis Voffset 1 max
2 typ
3 min
Conversion Gain vs Temp,
Vdda=5.0V, P=high
X axis temp -40 to 85 C
Y axis mean % deviation from nominal
1 R=20 k
2 R=30 k
3 R=40k
4 R=80k
5 R=120k
6 R=250k
7 R=500k
8 R=1.0 Meg
Operating current vs voltage, P=min, Iin=0
X axis Vdda, 1.7, 2.7, 3.3, 5.0
Y axis Op current uA
1 max at worst temp
2 typ at 25C
Operating current vs voltage, P=low, Iin=0
X axis Vdda, 1.7, 2.7, 3.3, 5.0
Y axis Op current uA
1 max at worst temp
2 typ at 25C
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Trans-Impedance Amplifier (TIA)
PSoC® Creator™ Component Data Sheet
Operating current vs voltage, P=med, Iin=0
X axis Vdda, 1.7, 2.7, 3.3, 5.0
Y axis Op current uA
1 max at worst temp
2 typ at 25C
Operating current vs voltage, P=high
Iin=0
X axis Vdda, 1.7, 2.7, 3.3, 5.0
Y axis Op current uA
1 max at worst temp
2 typ at 25C
Operating current vs temp, P=min, Iin=0
X axis Temp, -40 to +85C
Y axis op current uA
1 Typ at 2.7V
2 Max at 2.7V
3 Typ at 5.5V
4 Max at 5.5V
Operating current vs temp, P=low, Iin=0
X axis Temp, -40 to +85C
Y axis op current uA
1 Typ at 2.7V
2 Max at 2.7V
3 Typ at 5.5V
4 Max at 5.5V
Operating current vs temp, P=med, Iin=0
X axis Temp, -40 to +85C
Y axis op current uA
1 Typ at 2.7V
2 Max at 2.7V
3 Typ at 5.5V
4 Max at 5.5V
Operating current vs temp, P=high, Iin=0
X axis Temp, -40 to +85C
Y axis op current uA
1 Typ at 2.7V
2 Max at 2.7V
3 Typ at 5.5V
4 Max at 5.5V
Output voltage vs load current, Vdda=2.7V,
Rfb=120k, Vref=1.024V, P=min, Iin
adjusted for Vout=Vdd-0.050V at no load
X axis output current uA
Y axis output voltage
1 Vdd-Voh at -40
2 Vdd-Voh at 25
3 Vdd-Voh at 85
4 Vol at -40
5 Vol at 25
6 Vol at 85
Output voltage vs load current, Vdda=2.7V
Rfb=120k, Vref=1.024V, P=low, Iin
adjusted for Vout=Vdd-0.050V at no load
X axis output current uA
Y axis output voltage
1 Vdd-Voh at -40
2 Vdd-Voh at 25
3 Vdd-Voh at 85
4 Vol at -40
5 Vol at 25
6 Vol at 85
Output voltage vs load current, Vdda=2.7V,
Rfb=120k, Vref=1.024V, P=med, Iin
adjusted for Vout= Vdd-0.050V at no load
X axis output current uA
Y axis output voltage
1 Vdd-Voh at -40
2 Vdd-Voh at 25
3 Vdd-Voh at 85
4 Vol at -40
5 Vol at 25
6 Vol at 85
Output voltage vs load current, Vdda=2.7V,
Rfb=120k, Vref=1.024V, P=high, Iin
adjusted for Vout=Vdd-0.050V at no load
X axis output current uA
Y axis output voltage
1 Vdd-Voh at -40
2 Vdd-Voh at 25
3 Vdd-Voh at 85
4 Vol at -40
5 Vol at 25
6 Vol at 85
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PSoC® Creator™ Component Data Sheet
Trans-Impedance Amplifier (TIA)
Output voltage vs load current, Vdda=2.7V,
Rfb=120k, Vref=1.024V, P=min, Iin
adjusted for Vout- Vdd-0.050V at no load
X axis output current uA
Y axis output voltage
1 Vdd-Voh at -40
2 Vdd-Voh at 25
3 Vdd-Voh at 85
4 Vol at -40
5 Vol at 25
6 Vol at 85
Output voltage vs load current, Vdda=2.7V,
Rfb=120k, Vref=1.024V, P=min, Iin
adjusted for Vout- Vdd-0.050V at no load
X axis output current uA
Y axis output voltage
1 Vdd-Voh at -40
2 Vdd-Voh at 25
3 Vdd-Voh at 85
4 Vol at -40
5 Vol at 25
6 Vol at 85
Output voltage vs load current, Vdda=2.7V,
Rfb=120k, Vref=1.024V, P=min, Iin
adjusted for Vout- Vdd-0.050V at no load
X axis output current uA
Y axis output voltage
1 Vdd-Voh at -40
2 Vdd-Voh at 25
3 Vdd-Voh at 85
4 Vol at -40
5 Vol at 25
6 Vol at 85
Output voltage vs load current, Vdda=2.7V,
Rfb=120k, Vref=1.024V, P=min, Iin
adjusted for Vout- Vdd-0.050V at no load
X axis output current uA
Y axis output voltage
1 Vdd-Voh at -40
2 Vdd-Voh at 25
3 Vdd-Voh at 85
4 Vol at -40
5 Vol at 25
6 Vol at 85
5.0V/3.3V AC Electrical Characteristics
Parameter
Description
Conditions
Min
Typ
Max
Units
GBW_L
-3dB Bandwidth,
P=Low
Rconv=120k, Vdda=2.7 V, 25 C
tbc
tbc
na
MHz
GBW_H
-3dB Bandwidth,
P=High
Rconv=120k, Vdda=5.0 V, 25 C
tbc
tbc
na
MHz
BW20
-3dB Bandwidth
Rconv=20 kΩ
Cfb=0, P-high
1250
tbc
2000
kHz
BW30
-3dB Bandwidth
Rconv=30 kΩ
Cfb=0, P-high
1000
tbc
1500
kHz
BW40
-3dB Bandwidth
Rconv=40 kΩ
Cfb=0, P-high
800
tbc
1100
kHz
BW80
-3dB Bandwidth
Rconv=80 kΩ
Cfb=0, P-high
450
tbc
660
kHz
BW120
-3dB Bandwidth
Rconv=120 kΩ
Cfb=0, P-high
280
tbc
280
kHz
BW250
-3dB Bandwidth
Rconv=250 kΩ
Cfb=0, P-high
130
tbc
180
kHz
BW500
-3dB Bandwidth
Rconv=500 kΩ
Cfb=0, P-high
63
tbc
88
kHz
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Trans-Impedance Amplifier (TIA)
Parameter
PSoC® Creator™ Component Data Sheet
Description
Conditions
Min
Typ
Max
Units
BW1000
-3dB Bandwidth
Rconv=1000 kΩ
Cfb=0, P-high
31
tbc
42
kHz
SR_PMin
Slew Rate
20 - 80%, Rconv=120k, P=Min
tbc
tbc
na
V/us
SR_PLow
20 - 80%, Rconv=120k, P=Low
tbc
tbc
na
V/us
SR_PMed
20 - 80%, Rconv=120k, P=Med
tbc
tbc
na
V/us
SR_PHigh
20 - 80%, Rconv=120k, P=High
tbc
tbc
na
V/us
1.0 V step to 0.1%, CLoad= 15 pF
Vdda= 5.0 V, G=1, P=min
na
tbc
tbc
nsec
Tsettle_Plow
1.0 V step to 0.1%, CLoad= 15 pF
Vdda= 5.0 V, G=1, P=low
na
tbc
tbc
nsec
Tsettle_Pmed
1.0 V step to 0.1%, CLoad= 15 pF
Vdda= 5.0V, G=1, P=med
na
tbc
tbc
nsec
Tsettle_Phigh
1.0 V step to 0.1%, CLoad= 15 pF
Vdda= 5.0 V, G=1, P=high
na
tbc
tbc
nsec
Rconv=120k, f=10 kHz, P=min
na
tbc
na
nV/rtHz
Vn_Plow
Rconv=120k, f=10 kHz, P=Low
na
tbc
na
nV/rtHz
Vn_Pmed
Rconv=120k, f=10 kHz, P=Med
na
tbc
na
nV/rtHz
Vn_Phigh
Rconv=120k, f=10 kHz, P=High
na
tbc
na
nV/rtHz
CMRR
at 1.0 kHz, 1.0 V headroom,
Rconv=120k, Iin=0
90
60
PSRR
at 100 kHz, Vref=1.024 V
Rconv=120k, Iin=0
Tsettle_Pmin
Vn_Pmin
Settling time to
Noise
dB
69
Figures
Typical Gain vs freq, 3.3V, P=min, Cfb=0
Iin=1.0V/Rfb
X axis 10 kHz to 10 MHz
Y axis Gain, dB
1 R=20 k
2 R=30 k
3 R=40k
4 R=80k
5 R=120k
6 R=250k
7 R=500k
8 R=1.0 Meg
Typical Gain vs freq, 3.3V, P=low, Cfb=0
Iin=1.0V/Rfb
X axis 10 kHz to 10 MHz
Y axis Gain, dB
1 R=20 k
2 R=30 k
3 R=40k
4 R=80k
5 R=120k
6 R=250k
7 R=500k
8 R=1.0 Meg
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PSoC® Creator™ Component Data Sheet
Trans-Impedance Amplifier (TIA)
Typical Gain vs freq, 3.3V, P=med, Cfb=0
Iin=1.0V/Rfb
X axis 10 kHz to 10 MHz
Y axis Gain, dB
1 R=20 k
2 R=30 k
3 R=40k
4 R=80k
5 R=120k
6 R=250k
7 R=500k
8 R=1.0 Meg
Typical Gain vs freq, 3.3V, P=high, Cfb=0
Iin=1.0V/Rfb
X axis 10 kHz to 10 MHz
Y axis Gain, dB
1 R=20 k
2 R=30 k
3 R=40k
4 R=80k
5 R=120k
6 R=250k
7 R=500k
8 R=1.0 Meg
Typical Gain vs freq, 3.3V, P=high,
Cfb=1.3pF Iin=1.0V/Rfb
X axis 10 kHz to 10 MHz
Y axis Gain, dB
1 R=20 k
2 R=30 k
3 R=40k
4 R=80k
5 R=120k
6 R=250k
7 R=500k
8 R=1.0 Meg
Typical Gain vs freq, 3.3V, P=high,
Cfb=3.3pF Iin=1.0V/Rfb
X axis 10 kHz to 10 MHz
Y axis Gain, dB
1 R=20 k
2 R=30 k
3 R=40k
4 R=80k
5 R=120k
6 R=250k
7 R=500k
8 R=1.0 Meg
Typical Gain vs freq, 3.3V, P=high,
Cfb=4.6 pF, Iin=1.0V/Rfb
X axis 10 kHz to 10 MHz
Y axis Gain, dB
1 R=20 k
2 R=30 k
3 R=40k
4 R=80k
5 R=120k
6 R=250k
7 R=500k
8 R=1.0 Meg
-3dB BW (Typ, max) vs Vdda
Rfb=120k
X axis Vdda 1,7, 2.7, 3.3, 5.0
Y axis BW kHz
1 P=min, typ
2 P=min, min
3 P=low, typ
4 P=low, min
5 P=med, typ
6 P=med, min
7 P=high, typ
8 P=high, min
-3dB BW (Typ) vs Temp, P=min
X axis Temp deg C
Y axis -3dB BW kHz
1 R=20 k
2 R=30 k
3 R=40k
4 R=80k
5 R=120k
6 R=250k
7 R=500k
8 R=1.0 Meg
-3dB BW (Typ) vs Temp, P=low
X axis Temp deg C
Y axis -3dB BW kHz
1 R=20 k
2 R=30 k
3 R=40k
4 R=80k
5 R=120k
6 R=250k
7 R=500k
8 R=1.0 Meg
PRELIMINARY
Document Number: 001-61483 Rev. **
Page 15 of 16
Trans-Impedance Amplifier (TIA)
PSoC® Creator™ Component Data Sheet
-3dB BW (Typ) vs Temp, P=med
X axis Temp deg C
Y axis -3dB BW kHz
1 R=20 k
2 R=30 k
3 R=40k
4 R=80k
5 R=120k
6 R=250k
7 R=500k
8 R=1.0 Meg
-3dB BW (Typ) vs Temp, P=high
X axis Temp deg C
Y axis -3dB BW kHz
1 R=20 k
2 R=30 k
3 R=40k
4 R=80k
5 R=120k
6 R=250k
7 R=500k
8 R=1.0 Meg
Voltage noise, Vdda = 5.0V, P=high
Xaxis freq kHz .01 to 1000 kHz
Yaxis voltage noise nV/rtHz
PSRR vs freq, Vdda = 5.0V, P=high
X axis freq 100 Hz to 1.0 MHz
Y axis dB
Note More specifications at other voltages and graphs will be added after characterization.
Component Changes
This section lists the major changes in the component from the previous version.
Version
1.50
Description of Changes
Reason for Changes / Impact
Added Sleep/Wakeup and Init/Enable APIs.
To support low power modes, as well as to provide
common interfaces to separate control of initialization
and enabling of most components.
TIA parameter Pull-down values are reordered The TIA parameter pull-down values are not in
in the ascending order.
ascending order. The 80kOhm comes after
1000k Ohm. Reordered the values accordingly.
Changed the minus symbol to be the same
length as horizontal stroke in the '+' character.
Updated the minus symbol to meet the industry
standard.
Updated a conditional statement to properly
The charge pump clock was not being enabled
enable the charge pump clock for PSoC 3 ES3 properly and therefore SC blocks were not working.
silicon and PSoC 5 ES2 silicon or later.
© Cypress Semiconductor Corporation, 2009-2010. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the
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Cypress does not assume any liability arising out of the application or use of any product or circuit described herein. Cypress does not authorize its products for use as critical components in lifesupport systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress’ product in a life-support systems application
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PRELIMINARY
Page 16 of 16
Document Number: 001-61483 Rev. **