TEA7540 ST Microelectronics, Inc., TEA7540 Datasheet - Page 8

• Manufacturer Part Number: TEA7540
• Description: Handsfree Controller
• Manufacturer: ST Microelectronics, Inc.

TEA7540
Figure 3: Test Configuration
V
pin 7 is forced to transmit mode
pin 11 is forced to minimum gain
Input signal on pin 13 VINE = 1.5mVpp
output voltage VMICOUT measured on pin 12
Figure 5: Test Configuration
V
pin 7 is forced to transmit mode
pin 11 is forced to maximum gain
8/13
+
+
= 3V
= 3V
G1min = 20log (VMICOUT / VINE)
Figure 4: Test Configuration
V
pin 7 is forced to transmit mode
Input signal on pin 13 VINE in the compressing range (5mVpp for
example)
output voltage VMICOUT measured on pin 12
Figure 6: Test Configuration
V
pin 7 is forced to transmit mode
pin 11 is forced to minimum gain
+
+
= 3V
= 3V