Touchstone_Semiconductor-TS1004DB-datasheet.pdf — page 2

TS1002/TS1004 Dual/Quad Op-Amps Demo Board 
 
Page 2   
 
 
TS1002DB/TS1004DB r1p0 
 
 
 
RTFDS 
Description 
The TS1002 and the TS1004 demo boards provide 
two configurations for evaluating the TS1002 dual 
and the TS1004 quad operational amplifiers. A non-
inverting gain of +2 configuration is located on the 
left-hand side of each board and an inverting gain of -
1 configuration is located on the right-hand side of 
each board. In both cases, the input to each circuit is 
AC-coupled. The demo boards provide a re-biasing 
scheme at one-half the power supply or VDD/2 for the 
inverting configuration and at VDD/4 for the non-
inverting configuration. 
 
The TS1004 demo board provides resistor pads R3-
R10 and Jumpers B and C in order to access op 
amps B and C. The default configuration for op amps 
B and C is a unity-gain.The non-inverting inputs are 
shorted to ground with 1Ω resistors on resistor pads 
R5 and R8 and the outputs are connected to the 
inverting inputs with 1Ω resistors on resistor pads R3 
and R9.  
 
In 
both 
the 
non-inverting 
and 
the 
inverting 
configuration, the AC-coupling capacitor creates a 
high pass filter. The resulting cut-off frequency, fC, is 
given as:  
 
fC= 
 
   C 
 
In the non-inverting circuit on the TS1002 demo 
board, R=R4=1MΩ and C=C2=0.1µF. In the inverting 
case, R=R6=1MΩ and C=C3=0.1µF. In the non-
inverting circuit on the TS1004 demo board, 
 = 17=1MΩ and C=C5=0.1µF. In the inverting case, 
R=R14=1MΩ and C=C4=0.1µF. In both cases, these 
component values generate a high-pass cut-off 
frequency of 1.6Hz.  
 
Default Configurations 
 
Non-Inverting Configuration 
In the non-inverting configuration, the circuit’s transfer 
function is given by the following equation:  
 
  
   T
  N  = 1+   
   
 
With  1=  =2MΩ and  2=  =2MΩ on the TS1002 
demo board and  12=  =2MΩ and  11=  =2MΩ 
on the TS1004 demo board, the circuit signal gain is 
+2 with a circuit bandwidth of 2kHz. This results in an 
overall circuit bandwidth range of 1.6Hz to 2kHz.  
 
Inverting Configuration 
In an inverting configuration, the circuit’s transfer 
function is given by the following equation: 
 
   T
  N
 = -
  
   
 
In this case,  3=  =1MΩ and  6=  =1MΩ on the 
TS1002 
demo 
board 
and 
 13=  =1MΩ 
and 
 14=  =1MΩ on the TS1004 demo board. This 
results in a signal gain of -1 with a circuit bandwidth 
of 2kHz and an overall circuit bandwidth range of 
1.6Hz to 2kHz. 
 
Quick Start Procedures 
 
Required Equipment 
 
 TS1002 or TS1004 demo board 
 DC Power Supply, Single or Dual Output 
 Function Generator 
 4-channel Oscilloscope 
 Two 1MΩ oscilloscope probes 
Pin 
Non-Inverting 
Circuit 
Inverting 
Circuit 
VDD 
VDD 
VDD 
VSS 
GND 
GND 
INA, INB 
VIN 
VIN-1 
OUTA, OUTB 
VOUT 
VOUT-1 
         Table 1. TS1002 Demo Board Test Points 
Pin 
Non-Inverting 
Circuit 
Inverting 
Circuit 
VDD 
VDD 
VDD 
VSS 
GND 
GND 
INA, IND 
VIN 
VIN-1 
OUTD, OUTD 
VOUT 
VOUT-1 
        Table 2. TS1004 Demo Board Test Points 
Non-Inverting Configuration 
In order to evaluate the TS1002 dual or TS1004 quad 
operational 
amplifiers 
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 2.5V and then 
turn it off.