Silicon Labs TS1005-EVB User's Guide

Silicon Labs TS1005-EVB  User's Guide

REVISION NOTE

The current revision for the TS1005 Demo Boards display the identifier TS100x Demo Board on the top side of the evaluation board as depicted in Figure 1. If the identifier is not printed on the top side of the evaluation board, please contact Silicon Labs for support at: https://www.silabs.com/support/pages/contacttechnicalsu pport.aspx

COMPONENT LIST

DESIGNATION QTY DESCRIPTION

C1, C2, C3, C5 4 0.1µF ± 10% capacitors (0805) C4, C6 2 1µF ±10% capacitors (0805) 665k Ω ± 1% resistor (0805) R7 1 resistor (0805) R5, R6, R10 R8, R9 3 2 1M Ω ± 1% resistors (0805) 1.25M

Ω ± 1% resistors (0805) R1, R3, R4 3 2M Ω ± 1% resistors (0805) U1, U2 V DD ,V in ,V out ,GND 2 11 TS1005 operational amplifiers Test points

TS1005 Demo Board

FEATURES

 0.8V to 5.5V Single-supply operation  AC-coupled Non-Inverting and Inverting configuration supplied  Fully Assembled and Tested  2in x 2in 2-layer demo board

DESCRIPTION

The demo board for the TS1005 is a completely assembled and tested circuit board that can be used for evaluating the TS1005. The TS1005 is a precision CMOS operational amplifier fully specified to operate over a supply voltage range from 0.8V to 5.5V with a GBWP of 20kHz. Fully specified at 1.8V, the TS1005 is optimized for ultra-long-life battery powered applications. The TS1005 exhibits a typical input bias current of 2pA, and rail-to-rail input and output stages. The TS1005 is fully specified over the industrial temperature range (-40°C to +85°C). The TS1005 evaluation board is offered with either a PCB-space saving 5-lead SC70 or 5-lead SOT23 packaging. Product data sheets and additional documentation can be found at www.silabs.com

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Ordering Information Order Number

TS1005DB TS1005DB-SOT

Description

SC70 Packaging Demo Board SOT23 Packaging Demo Board

Figure 1. TS1005 Demo Board Top View Figure 2. TS1005 Demo Board Bottom View

Page 1 © 2014 Silicon Laboratories, Inc. All rights reserved.

TS1005 Demo Board

Description

The TS1005 evaluation boards provide two configurations for evaluating the TS1005 operational amplifier in one single PCB board, namely a non inverting configuration located on the left-hand side of the board and an inverting configuration located on the right-hand side of the board. In both cases, the input to each circuit is AC-coupled. The demo board provides a re-biasing scheme at one-half the power supply or V DD /2 for the inverting configuration and at V DD /4 for the non-inverting configuration. The TS1005 demo board provides a dedicated power supply for the non-inverting circuit and a dedicated power supply for the inverting circuit. This provides the user the flexibility of evaluating one circuit at a time or both at the same time. In both the non-inverting and the inverting configuration, the AC-coupling capacitor creates a high pass filter. The resulting cut-off frequency, f C , is given as: 1 f C = 2 π RC In the non-inverting circuit, R=R5=1M Ω and C=C5=0.1µF. In the inverting case, R=R10=1M Ω generate a high-pass cut-off frequency of 1.6Hz. and C=C1=0.1µF. In both cases, these component values

Default Configurations

Non-Inverting configuration

In the non-inverting configuration, the circuit’s transfer function is given by the following equation: V OUT V IN = 1+ R4 R3 With R4=2M Ω and R3=2M Ω the circuit signal gain is 2 with a circuit bandwidth of 10kHz. This results in an overall circuit bandwidth range of 1.6Hz to 10kHz.

Inverting configuration

In an inverting configuration, the circuit’s transfer function is given by the following equation: V OUT V IN = R6 R10 In this case, R6=1M 10kHz. Ω and R10=1M Ω . This results in a signal gain of -1 with a circuit bandwidth of 10kHz and an overall circuit bandwidth range of 1.6Hz to

Quick Start Procedures

Required Equipment

 TS1005 demo board  DC Power Supply, Single or Dual Output  Function  4-channel  Two Ω oscilloscope probes

Non-Inverting Configuration

In order to evaluate the TS1005 operational amplifier in the non-inverting configuration, the following steps are to be performed: 1) Before connecting the DC power supply to the demo board power test points, turn on the power supply and set the DC voltage to 5.5V and then turn it off. 2) Set the function generator frequency to 500Hz and output level with a V 200mV PP OH = 2.35V and a V , centered at 2.25V. OL = 2.15V. This sets the input signal swing to 3) In order to monitor the input and output signal, select two channels on the oscilloscope and set the vertical voltage scale and the vertical position on each channel to 100mV/DIV and -2.25V, respectively. Set the horizontal time scale to 500µs/DIV. 4) Connect the positive terminal of the DC power supply to V DD and the ground terminal to GND. Page 2 TS1005-EVB Rev. 1.0

5) Connect the signal output of the function generator to V in and the ground terminal to GND. 6) To monitor the input, connect the signal terminal of one of the oscilloscope probes to V in and the ground terminal to GND. To monitor the output, use the second probe to connect the signal terminal to V OUT and the ground terminal to GND. 7) Turn on the power supply and check that the power supply current is approximately 4.3µA. 8) Turn on the function generator. 9) Observe the input and output signal. The output signal is an amplified version of the input signal with an output swing of approximately 400mV PP , corresponding to a signal gain of two.

Inverting Configuration

In order to evaluate the TS1005 operational amplifier in the inverting configuration, the following steps are to be performed: 1) Before connecting the DC power supply to the demo board, turn on the power supply and set the DC voltage to 5.5V and then turn it off. 2) Set the function generator output frequency to 500Hz and output level with a V OH = 2.35V and a V OL = 2.15V. This sets the input swing to 200mV PP , centered at 2.25V.

Figure 3. Non-Inverting Configuration TS1005 Demo Board

3) In order to monitor the input and output signal, select two channels on the oscilloscope and set the vertical voltage scale and the vertical position on each channel to 100mV/DIV and -2.25V, respectively. Set the horizontal time scale to 500µs/DIV. 4) Connect the positive terminal of the DC power supply to VDD and the ground terminal to GND. 5) Connect the signal output of the function generator to V in and the ground terminal to GND. 6) To monitor the input, connect the signal terminal of one of the oscilloscope probes to V in and the ground terminal to GND. To monitor the output, use the second probe to connect the signal terminal to V OUT and the ground terminal to GND. 7) Turn on the power supply and check that the power supply current is approximately 3.8µA. 8) Turn on the function generator. 9) Observe the input and output signal. The output signal is an inverted version of the input signal and the swing should be 200mV PP .

Figure 4. Inverting Configuration

TS1005-EVB Rev. 1.0 Page 3

TS1005 Demo Board Figure 5. TS1005 Demo Board Top Layer #1 Figure 6. TS1005 Demo Board Top Layer #2 Figure 7. TS1005 Demo Board Bottom Layer (GND) #1 Figure 8. TS1005 Demo Board Bottom Layer (GND) #2 Silicon Laboratories, Inc.

400 West Cesar Chavez, Austin, TX 78701 +1 (512) 416-8500 ▪ www.silabs.com Page 4 TS1005-EVB Rev. 1.0

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Disclaimer

Silicon Laboratories intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers using or intending to use the Silicon Laboratories products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific device, and "Typical" parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. Silicon Laboratories reserves the right to make changes without further notice and limitation to product information, specifications, and descriptions herein, and does not give warranties as to the accuracy or completeness of the included information. Silicon Laboratories shall have no liability for the consequences of use of the information supplied herein. This document does not imply or express copyright licenses granted hereunder to design or fabricate any integrated circuits. The products must not be used within any Life Support System without the specific written consent of Silicon Laboratories. A "Life Support System" is any product or system intended to support or sustain life and/or health, which, if it fails, can be reasonably expected to result in significant personal injury or death. Silicon Laboratories products are generally not intended for military applications. Silicon Laboratories products shall under no circumstances be used in weapons of mass destruction including (but not limited to) nuclear, biological or chemical weapons, or missiles capable of delivering such weapons.

Trademark Information

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http://www.silabs.com

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