THS3122 Datasheet, PDF (1/43 Pages) Texas Instruments – LOW-NOISE, HIGH-SPEED, 450 mA CURRENT FEEDBACK AMPLIFIERS

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THS3122, THS3125
SLOS382E – SEPTEMBER 2001 – REVISED MAY 2015
THS312x Low-Noise, High-Speed, 450-mA Current Feedback Amplifiers
1 Features
•1 Low Noise:
– 2.9-pA/√Hz Noninverting Current Noise
– 10.8-pA/√Hz Inverting Current Noise
– 2.2-nV/√Hz Voltage Noise
– 128-MHz , –3-dB BW (R_L = 50 Ω, R_F = 470 Ω)
– 1550-V/µs Slew Rate (G = 2, R_L= 50Ω )
• High Output Current: 450 mA
• High Speed:
– 128-MHz , –3-dB BW (R_L = 50 Ω, R_F = 470 Ω)
– 1550-V/µs Slew Rate (G = 2, R_L= 50Ω )
– 26-V_PP Output Voltage, R_L= 50 Ω
– –80 dBc (1 MHz, 2 V_PP, G = 2)
• Wide Output Swing:
– 26-V_PP Output Voltage, R_L= 50 Ω
– –80 dBc (1 MHz, 2 V_PP, G = 2)
– 370-µA Shutdown Supply Current
• Low Distortion:
– –80 dBc (1 MHz, 2 V_PP, G = 2)
– 370-µA Shutdown Supply Current
• Low-Power Shutdown Mode (THS3125)
– 370-µA Shutdown Supply Current
• Standard SOIC, HSOP PowerPAD™, and
HTSSOP PowerPAD Packages
2 Applications
• Video Distribution
• Instrumentation
• Line Drivers
• Motor Drivers
• Piezo Drivers
3 Description
The THS3122 and THS3125 are low-noise, high-
speed current feedback amplifiers, with high output
current drive. This makes them ideal for any
application that requires low distortion over a wide
frequency with heavy loads. The THS3122 and
THS3125 can drive four serially-terminated video
lines while maintaining a differential gain error less
than 0.03%.
The high output drive capability of the THS3122 and
THS3125 enables the devices to drive 50-Ω loads
with low distortion over a wide range of output
voltages:
• –80-dBc THD at 2 V_PP
• –75-dBc THD at 8 V_PP
The THS3122 and THS3125 operate from ±5-V to
±15-V supply voltages while drawing as little as
7.2 mA of supply current per channel. The THS3125
offers a low-power shutdown mode, reducing the
supply current to only 370 µA. The THS3122 and
THS3125 are packaged in SOIC, HSOP, and
HTSSOP packages.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
THS3122
SOIC (8)
HSOP (8)
4.90 mm × 3.91 mm
4.89 mm × 3.90 mm
THS3125
SOIC (14)
HTSSOP (14)
8.65 mm × 3.91 mm
5.00 mm × 4.40 mm
(1) For all available packages, see the package option addendum
at the end of the data sheet.
Voltage Noise and Current Noise
vs
Frequency
100
V_CC = ±5 V to ±15 V
T_A = +25°C
I_n−
10
I_n+
V_n
THS3122
SOIC (D) and
HSOP (SOIC PowerPAD, DDA) Package
(Top View)
1 OUT
1
1 IN−
2
1 IN+
3
V_CC−
4
8
V_CC+
7 ^{2 OUT}
6 ^{2 IN−}
5 ^{2 IN+}
1
0.01
0.1
1
10
100
f − Frequency − kHz
THS3125
SOIC (D) and
HTSSOP PowerPAD (PWP) Package
(Top View)
1 OUT 1
1 IN− 2
1 IN+ 3
V_CC− 4
N/C 5
REF 6
N/C 7
14 V_CC+
13 2 OUT
12 2 IN−
11 2 IN+
10 N/C
9 SHUTDOWN
8 N/C
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.