THS3491 Datasheet, PDF (6/28 Pages) Texas Instruments – 900-MHz, High-Power Output, Current Feedback Amplifier

THS3491
SBOS875 – AUGUST 2017
www.ti.com
Electrical Characteristics: V_S = ±15 V (continued)
at +V_S = 15 V, –V_S = –15 V, T_A = 25°C, R_LOAD = 100 Ω, noninverting gain = 5 V/V, and RGT package: R_F = 576 Ω,
R_G = 143 Ω, or DDA package: R_F = 798 Ω, R_G = 200 Ω (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
I_b- drift
Inverting input bias current drift
Internal trace resistance to
feedback pin
CMRR Common-mode rejection ratio
INPUT
HR_IN Headroom to either supply
Z_IN+
Noninverting input impedance
Z_IN-
Inverting input impedance
OUTPUT
HR_OUT Headroom to either supply
Iout_MAX Maximum current output
Linear output current
Peak output current in transition
(zero-crossing I_OUT peak)
ISC
Output short-circuit current
Z_OUT DC output impedance
POWER SUPPLY
I_Q
Quiescent current
I_Q TC Supply current tempco
PSRP Power-supply rejection positive
PSRN Power-supply rejection negative
POWER DOWN
Allowed REF pin voltage range
Recommended REF pin voltage
REF current to ground
V_IL
Disable voltage threshold
V_IH
Enable voltage threshold
PD pin low-input bias current
PD pin high-input bias current
+V_S Disabled supply current
–V_S Disabled supply current
t_ON
Turn-on time delay
t_OFF
Turn-off time delay
–40°C ≤ T_J ≤ +125°C
RGT only, pins 10 and 11 to pin 1
f = dc
CMRR > 60 dB
Closed-loop measurement
Open-loop measurement
R_LOAD = 100 Ω
R_LOAD = 24 Ω, V_O = ±12.67 V, magnitude,
both polarities
R_LOAD = 24 Ω, V_O = ±9.4 V, Z_OL > 1M Ω,
magnitude, both polarities
V_O = 0 V, ±620 mA, R_O < 0.5 Ω, magnitude,
both polarities
V_S = ±9 V, V_O = ±6 V, magnitude, both
polarities
Closed-loop ±50 mA
V_S = ±15 V, no load
V_S = ±16 V, no load
V_S = ±7 V, no load
V_S = ±15 V, –40°C ≤ T_J ≤ +125°C, no load
REF pin can be floated. PD pin must be
floated or held above REF pin. If REF is
tied to +V_S, the device is enabled with PD
floating. Range is –V_S to (+V_S – 5 V)
For bipolar supplies, normally ground REF
pin
REF pin = 0 V, PD floated, positive out of
the pin.
PD below REF pin voltage turns amplifier
off, turn off is within 0.8 V above REF,
REF pin = 0 V
PD above REF pin voltage turns amplifier
on, turn on is 1.6 V above REF,
REF pin = 0 V
PD = REF = ground, positive out of the pin.
PD = REF + 3 V, REF = ground, positive
out of the pin.
Supply current magnitude only
Supply current magnitude only
DC input to 90% of final value
DC input to 10% of final value
15
1.1 1.5
63
75
4.1
50
15
1.3
1.5
480
520
380
420
500
540
550
620
0.17
16.3 16.75
16.4 16.85
15.4 15.8
–4
78
82
77
80
–15
0
33
42
1.6
35
46
–1
0
650
795
600
723
50
4
nA/°C
1.9
Ω
dBc
4.3
V
kΩ
Ω
1.7
V
550 mA
mA
mA
mA
Ω
17.3 mA
17.4 mA
16.5 mA
4 µA/°C
dB
dB
10
V
V
51
µA
0.8
V
V
52 µA
1 µA
880 µA
820 µA
ns
µs
TEST
LEVEL
B
A
C
C
C
C
A
A
A
B
C
C
A
A
A
B
A
A
C
C
A
A
A
A
A
A
A
C
C
6
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