THS4532IPWR datasheet(23/44 Pages) TI

23 / 44 page

VOUT+

VIN±

VIN+

0.22 F

ROT

RIT

Output to 50-

Test Equipment

Input From 50-

Test Equipment

1:1

No Connection

0.22 F

49.9

VOUT±

Installed to Balance

Amplifier

VS+

THS4532

VS±

VOCM

0.22 F

THS4532

www.ti.com

SLOS829 – FEBRUARY 2013

APPLICATION INFORMATION

TYPICAL CHARACTERISTICS TEST CIRCUITS

Figure 70 shows the general test circuit built on the EVM that was used for testing the THS4532. For simplicity,

power supply decoupling is not shown – please see layout in the applications section for recommendations.

Depending on the test conditions, component values are changed per Table 2 and Table 3, or as otherwise

noted. Some of the signal generators used are ac coupled 50

Ω sources and a 0.22µF cap and 49.9Ω resistor to

ground are inserted across RIT on the un-driven or alternate input as shown to balance the circuit. Split-power

supply is used to ease the interface to common lab test equipment, but if properly biased, the amplifier can be

operated single-supply as described in the applications section with no impact on performance. For most of the

tests, the devices are tested with single ended input and a transformer on the output to convert the differential

output to single ended because common lab test equipment have single ended inputs and outputs. Performance

is the same or better with differential input and differential output.

Figure 70. General Test Circuit

Table 2. Gain Component Values for Single-Ended Input(1)

GAIN

RIT

1 V/V

51.1

2 V/V

52.3

5 V/V

392

53.6

10 V/V

187k

57.6

(1)

Note components are chosen to achieve gain and 50

Ω input termination. Resistor values shown are closest standard values so gains

are approximate.

Table 3. Load Component Values For 1:1 Differential to Single-Ended Output Transformer(1)

ROT

ATTEN

100

open

200

86.6

69.8

16.8

499

237

56.2

25.5

487

52.3

31.8

976

51.1

37.9

(1)

Note the total load includes 50

Ω termination by the test equipment. Components are chosen to achieve load and 50Ω line termination

through a 1:1 transformer. Resistor values shown are closest standard values so loads are approximate.

Submit Documentation Feedback

Product Folder Links :THS4532

THS4532IPWR Datasheet(PDF) 23 Page - Texas Instruments

THS4532IPWR Datasheet(HTML) 23 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44

Datasheet Download

Link URL