LMP7732_15 Datasheet, PDF (1/26 Pages) Texas Instruments – 2.9 nV/sqrt(Hz) Low Noise, RRIO Amplifier

LMP7732
www.ti.com
SNOSAZ0E – AUGUST 2007 – REVISED MARCH 2013
2.9 nV/sqrt(Hz) Low Noise, RRIO Amplifier
Check for Samples: LMP7732
FEATURES
1
•23 (Typical Values, T_A = 25°C, V_S = 5V)
• Input Voltage Noise
– f = 3 Hz 3.3 nV/√Hz
– f = 1 kHz 2.9 nV/√Hz
• CMRR 130 dB
• Open Loop Gain 130 dB
• GBW 22 MHz
• Slew Rate 2.4 V/µs
• THD 0.001% @ f = 10 kHz, AV = 1, RL = 2 kΩ
• Supply Current 4.4 mA
• Supply Voltage Range 1.8V to 5.5V
• Operating Temperature Range −40°C to 125°C
• Input Bias Current ±1.5 nA
• RRIO
APPLICATIONS
• Gas Analysis Instruments
• Photometric Instrumentation
• Medical Instrumentation
DESCRIPTION
The LMP7732 is a dual low noise, rail-to-rail input
and output, low voltage amplifier. The LMP7732 is
part of the LMP™ amplifier family and is ideal for
precision and low noise applications with low voltage
requirements.
This operational amplifier offers low voltage noise of
2.9 nV/√Hz with a 1/f corner of only 3 Hz. The
LMP7732 has bipolar junction input stages with a
bias current of only 1.5 nA. This low input bias
current, complemented by the very low level of
voltage noise, makes the LMP7732 an excellent
choice for photometry applications.
The LMP7732 provides a wide GBW of 22 MHz while
consuming only 4 mA of current. This high gain
bandwidth along with the high open loop gain of 130
dB enables accurate signal conditioning in
applications with high closed loop gain requirements.
The LMP7732 has a supply voltage range of 1.8V to
5.5V, making it an ideal choice for battery operated
portable applications.
The LMP7732 is offered in the 8-Pin SOIC and
VSSOP packages.
The LMP7731 is the single version of this product
and is offered in the 5-Pin SOT-23 and 8-Pin SOIC
packages.
Typical Performance Characteristics
Input Voltage Noise vs. Frequency
Input Current Noise vs. Frequency
100
V_S = 2.5V, 3.3V, 5V
100
V_S = 2.5V, 3.3V, 5V
10
V_CM = 0.5V
V_CM = 2.5V
1
0.1
1
10 100 1k 10k
FREQUENCY (Hz)
V_CM = 0.5V
10
V_CM = 2.5V
1
0.1
1
10
100
1k
10k
FREQUENCY (Hz)
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.
LMP 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 © 2007–2013, Texas Instruments Incorporated