THS4521 datasheet(18/53 Pages) TI2

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7.9 Typical Characteristics: (VS+) – (VS–) = 3-V to 12-V Supply Range (continued)

at TA ≈ 25°C, VOCM pin = open, RF = 1.5 kΩ, RL = 1 kΩ, VO = 2 VPP, 50-Ω input match, G = 1 V/V, PD = VS+, single-ended

input, differential output, and input and output referenced to default midsupply for AC-coupled tests (unless otherwise noted);

see Figure 8-1 for a gain of 1-V/V test circuit.

Frequency (Hz)

-12

-9

-6

-3

100k

10M

VS = 12 V, VO = 10 mVPP

VS = 5 V, VO = 10 mVPP

VS = 3 V, VO = 10 mVPP

VS = 5 V, VO = 0.1 VPP

VS = 12 V, VO = 1 VPP

VS = 5 V, VO = 1 VPP

Figure 7-47. Common-Mode Voltage, Small-Signal and Large-

Signal Response (VOCM Pin Driven)

Frequency (Hz)

100

1000

5000

100

10k

100k

10M

D057

VS = 3 V, VOCM floating

VS = 3 V, VOCM driven

VS = 5 V, VOCM floating

VS = 5 V, VOCM driven

VS = 12 V, VOCM floating

VS = 12 V, VOCM driven

The VOCM pin is either driven to midsupply by low-impedance

source or allowed to float and default to midsupply

Figure 7-48. Output Common-Mode (VOCM) Noise vs Frequency

Time, 100 ns per division

-70

-60

-50

-40

-30

-20

-10

D056

VS = 3 V

VS = 5 V

VS = 12 V

VOCM pin driven, 0.1-V VOCM step

Figure 7-49. Common-Mode Voltage Small-Signal Step

Response

Time (ns)

200

400

600

800

1000

1200

1400

1600

-0.6

-0.5

-0.4

-0.3

-0.2

-0.1

0.1

0.2

0.3

0.4

0.5

0.6

D074

VS = 3 V

VS = 5 V

VS = 12 V

VOCM pin driven, 1-V VOCM step

Figure 7-50. Common-Mode Voltage Large-Signal Step

Response

Frequency (Hz)

100

10k

100k

10M

D051

Small-Signal

Large-Signal, VO = 2 VPP

Simulated

Figure 7-51. Output Balance vs Frequency

Frequency (Hz)

100

110

120

130

140

150

10k

100k

10M

100M

D053

CMRR

PSRR+

PSRR

Simulated

Figure 7-52. CMRR and PSRR vs Frequency

THS4561

SBOS874D – AUGUST 2017 – REVISED FEBRUARY 2021

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