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LMH6629
SNOSB18I –APRIL 2010–REVISED DECEMBER 2014
LMH6629 Ultra-Low Noise, High-Speed Operational Amplifier with Shutdown
1 Features
3 Description
The LMH6629 is a high-speed, ultra-low noise
amplifier designed for applications requiring wide
bandwidth with high gain and low noise such as in
communication, test and measurement, optical and
ultrasound systems.
1
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Specified for VS = 5 V, RL = 100 Ω, AV = 10V/V
WSON-8 Package, unless Specified. –3dB
Bandwidth 900 MHz
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Input Voltage Noise 0.69 nV/√Hz
Input Offset Voltage Max. Over Temperature ±0.8
mV
The LMH6629 operates on 2.7-V to 5.5-V supply with
an input common mode range that extends below
ground and outputs that swing to within 0.8 V of the
rails for ease of use in single supply applications.
Heavy loads up to ±250 mA can be driven by high-
frequency large signals with the LMH6629's –3dB
bandwidth of 900 MHz and 1600 V/µs slew rate. The
LMH6629 (WSON-8 package only) has user-
selectable internal compensation for minimum gains
of 4 or 10 controlled by pulling the COMP pin low or
high, thereby avoiding the need for external
compensation capacitors required in competitive
devices. Compensation for the SOT-23-5 package is
internally set for a minimum stable gain of 10 V/V.
The WSON-8 package also provides the power-down
enable/disable feature.
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Slew Rate 1600 V/ μs
HD2 @ f = 1 MHz, 2VPP −90 dBc
HD3 @ f = 1 MHz, 2VPP −94 dBc
Supply Voltage Range 2.7 V to 5.5 V
Typical Supply Current 15.5 mA
Selectable Min. Gain ≥4 or ≥10 V/V
Enable Time: 75 ns
Output Current ±250 mA
WSON-8 and SOT-23-5 Packages
2 Applications
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Instrumentation Amplifiers
Ultrasound Pre-amps
Wide-band Active Filters
Opto-Electronics
The low-input noise (0.69 nV/√Hz and 2.6 pA/√Hz),
low distortion (HD2/HD3 = −90 dBc/−94 dBc) and
ultra-low DC errors (800 µV VOS maximum over
temperature, ±0.45 µV/°C drift) allow precision
operation in both ac- and dc-coupled applications.
Medical Imaging Systems
Base-Station Amplifiers
The LMH6629 is fabricated in Texas Instruments'
proprietary SiGe process and is available in a 3 mm ×
3 mm 8-pin WSON package as well as the SOT-23-5
package.
Low-Noise Single Ended to Differential
Conversion
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Trans-Impedance Amplifier
Device Information(1)
PART NUMBER
PACKAGE
SOT-23 (5)
WSON (8)
BODY SIZE (NOM)
2.90 mm × 1.60 mm
3.00 mm × 3.00 mm
LMH6629
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Transimpedance Amplifier
C
F
0.6 pF
(1.2 pF (2) series)
+5VDC
D1
R
1.2k
F
C
D
= 10 pF
I
D
+5VDC
LMH
6629
+5VDC
R
500
L
R2
2k
C1
0.1 PF
R1
3k
Vout = 3VDC - 1200 x I
D
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.