OPA830 datasheet(17/56 Pages) TI

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6.9 Typical Characteristics: Over Supply Range (continued)

at PD = VS+ and TA = 25°C (unless otherwise noted)

CLOAD (pF)

100

120

140

160

180

200

220

100

10k

D049

AV = 6 V/V

AV = 10 V/V

AV = 20 V/V

See Figure 7-6 and Table 8-1

small signal, targeting 30° phase margin

Figure 6-49. Output Resistor vs CLOAD

Frequency (Hz)

-6

-3

10k

100k

10M

100M

D050

AV = 6, CLOAD = 100 pF

AV = 10, CLOAD = 100 pF

AV = 20, CLOAD = 100 pF

AV = 6, CLOAD = 1 nF

AV = 10, CLOAD = 1 nF

AV = 20, CLOAD = 1 nF

See Figure 7-6 and Table 8-1

2-kΩ parallel load to C LOAD

Figure 6-50. Small-Signal Response Shapes vs CLOAD With

Recommended ROUT

Time (Ps)

4.5

5.5

6.5

7.5

8.5

9.5

-2.5

-2

-1.5

-1

-0.5

0.5

1.5

2.5

D051

PD Voltage (5 V)

Output Voltage (5 V)

PD Voltage (3 V)

Output Voltage (3 V)

Figure 6-51. Turn-On Time to Sinusoidal Input

Time (Ps)

1.8

1.84 1.88 1.92 1.96

2.04 2.08 2.12 2.16

2.2

-2.5

-2

-1.5

-1

-0.5

0.5

1.5

2.5

D052

PD Voltage (5 V)

Output Voltage (5 V)

PD Voltage (3 V)

Output Voltage (3 V)

Figure 6-52. Turn-Off Time to Sinusoidal Input

Time from turn on (Ps)

0.5

1.5

2.5

3.5

-0.005

0.5

-0.004

-0.003

1.5

-0.002

-0.001

2.5

0.001

3.5

0.002

0.003

4.5

0.004

0.005

5.5

0.006

0.007

5 V Disable V

5 V VOUT

5 V %Err

3 V Disable V

3 V VOUT

3 V %Err

Single-supply, DC input to produce midscale output

(simulation)

Figure 6-53. Gain of 6-V/V Turn-On Time to Final DC Value at

Midscale

Time from turn on (Ps)

0.5

1.5

2.5

3.5

-0.005

0.5

-0.004

-0.003

1.5

-0.002

-0.001

2.5

0.001

3.5

0.002

0.003

4.5

0.004

0.005

5.5

0.006

0.007

5 V Disable V

5 V VOUT

5 V %Err

3 V Disable V

3 V VOUT

3 V %Err

Single-supply, DC input to produce midscale output

(simulation)

Figure 6-54. Gain of 10-V/V Turn-On Time to Final DC Value at

Midscale

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OPA838

SBOS867D – AUGUST 2017 – REVISED SEPTEMBER 2024

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