THS3120_16 Datasheet, PDF (1/35 Pages) Texas Instruments – LOW-NOISE, HIGH-OUTPUT DRIVE, CURRENT-FEEDBACK OPERATIONAL AMPLIFIERS

THS3120
THS3121
www.ti.com........................................................................................................................................ SLOS420E – SEPTEMBER 2003 – REVISED OCTOBER 2009
LOW-NOISE, HIGH-OUTPUT DRIVE, CURRENT-FEEDBACK
OPERATIONAL AMPLIFIERS
Check for Samples: THS3120 THS3121
FEATURES
1
•23 Low Noise:
– 1 pA/√Hz Noninverting Current Noise
– 10 pA/√Hz Inverting Current Noise
– 2.5 nV/√Hz Voltage Noise
• High Output Current Drive: 475 mA
• High Slew Rate:
– 1700 V/μs (R_L = 50 Ω, V_O = 8 V_PP)
• Wide Bandwidth: 120 MHz (G = 2, R_L = 50 Ω)
• Wide Supply Range: ±5 V to ±15 V
• Power-Down Feature: (THS3120 Only)
APPLICATIONS
• Video Distribution
• Power FET Driver
• Pin Driver
• Capacitive Load Driver
DESCRIPTION
The THS3120 and THS3121 are low-noise,
high-voltage, high output current drive,
current-feedback amplifiers designed to operate over
a wide supply range of ±5 V to ±15 V for today's
high-performance applications.
The THS3120 offers a power saving mode by
providing a power-down pin for reducing the 7-mA
quiescent current of the device, when the device is
not active.
These amplifiers provide well-regulated ac
performance characteristics. Most notably, the 0.1-dB
flat bandwidth is exceedingly high, reaching beyond
90 MHz. The unity-gain bandwidth of 130 MHz allows
for good distortion characteristics at 10 MHz. Coupled
with high 1700-V/μs slew rate, the THS3120 and
THS3121 amplifiers allow for high output voltage
swings at high frequencies.
The THS3120 and THS3121 are offered in an
SOIC-8 (D) package and an MSOP-8 (DGN)
PowerPAD™ package.
DIFFERENTIAL GAIN
vs
NUMBER OF LOADS
0.07
Gain = 2,
0.06
R_F = 649 Ω,
V_S = ±15 V,
40 IRE − NTSC and PAL,
0.05 ^{Worst Case ±100 IRE Ramp}
0.04
PAL
0.03
NTSC
0.02
0.01
DIFFERENTIAL PHASE
vs
NUMBER OF LOADS
0.14
Gain = 2,
0.12
R_F = 649 Ω,
V_S = ±15 V,
40 IRE − NTSC and PAL,
Worst Case ±100 IRE Ramp
0.1
0.08
PAL
0.06
NTSC
0.04
0.02
VIDEO DISTRIBUTION AMPLIFIER APPLICATION
649 Ω
649 Ω
15 V 75-Ω Transmission Line _VO(1)
−
V_I
+
75 Ω
−15 V
75 Ω
n Lines
75 Ω
75 Ω
V_O(n)
0
0 1234 5678
Number of 150 Ω Loads
0
01 2 34 5 678
Number of 150 Ω Loads
75 Ω
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a trademark of Texas Instruments.
2
All other trademarks are the property of their respective owners.
3
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2003–2009, Texas Instruments Incorporated