THS3215 Datasheet, PDF (20/71 Pages) Texas Instruments – THS3215 650-MHz, Differential to Single-Ended DAC Output Amplifier

THS3215
SBOS780A – MARCH 2016 – REVISED APRIL 2016
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7.13 Typical Characteristics: Switching Performance
at +V_CC = 6 V, –V_CC = –6 V, 25-Ω D2S source impedance , V_IC = 0.25 V, internal path selected (PATHSEL = GND), V_REF =
GND, D2S R_LOAD = 200 Ω at pin 6, R_F = 249 Ω, R_G = 162 Ω, OPS On (DISABLE = GND), OPS R_LOAD = 100 Ω at pin 11, and
T_J ≈ 25°C (unless otherwise noted)
3.5
3
2.5
2
1.5
1
0.5
0
PATHSEL In
OPS V_OUT
-0.5
Time (100 ns/div.)
D055
D2S Inputs: IN+ = IN– = GND, OPS input: VIN+ = 1 V
Figure 55. PATHSEL Switching Time
-20
Ext Path, OPS A_V = 2.5 V/V
-30
Ext Path, OPS A_V = 10 V/V
Int Path, OPS A_V = 2.5 V/V
-40
Int Path, OPS A_V = 10 V/V
-50
-60
-70
-80
-90
-100
1M
10M
100M
Frequency (Hz)
1G
D057
3.5
3
2.5
2
1.5
1
0.5
0
-0.5
-1
DISABLE In
OPS V_OUT
-1.5
Time (100 ns/div.)
D056
PATHSEL = high, OPS input: VIN+ = 1 V_PP , 10-MHz sine wave
Figure 56. OPS Enable and Disable Time
-10
Int Path, OPS A_V = 2.5 V/V
-20
Ext Path, OPS A_V = 2.5 V/V
-30
-40
-50
-60
-70
-80
1M
10M
100M
Frequency (Hz)
1G
D058
Figure 57. OPS Forward Feedthrough in Disable
3
2.5
2
1.5
1
0.5
PATHSEL In
0
r5-V supply
r6-V supply
r7.5-V supply
-0.5
Time (1 Ps/div.)
D059
D2S inputs: IN+ = IN– = GND, OPS input: VIN+ = 1 V
Figure 59. PATHSEL Switching Threshold vs Power Supply
Figure 58. OPS Reverse Feedthrough in Disable
3.5
3
2.5
2
DISABLE In
1.5
r5-V supply
r6-V supply
1
r7.5-V supply
0.5
0
-0.5
Time (1 Ps/div.)
D060
PATHSEL = high, OPS input: VIN+ = 1 V
Figure 60. OPS Shutdown Threshold vs Power Supply
20
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