Information

16 | Signal Chain Guide 2013 Texas Instruments
Amplifiers and Comparators
High-Speed Amplifiers (>50 MHz)
Get more information: www.ti.com/product/Part Number
(OPA835, OPA836, OPA2835, OPA2836)
Very Low Power, Rail-to-Rail Operational Amplifiers
OPA835/6, OPA2835/6
Fabricated using the industry-leading BiCom-3x (SiGe complementary bipolar) process,
the OPA835/6 and OPA2835/6 are single and dual ultra-low-power, rail-to-rail output,
negative rail input, voltage-feedback operational amplifiers designed to operate over
a power supply range of 2.5 V to 5.5 V single supply and ±1.25 V to ±2.75 V dual
supply. These devices set an industry leading power-to-performance ratio for rail-to-rail
amplifiers.
OPA835/6, OPA2835/6 functional block diagram
Key Features
• Ultra-lowpower
• OPA835/2835bandwidth:56MHz
OPA836/2836 bandwidth: 205 MHz
• OPA836/2836CMRR:113dB
OPA835/2835 CMRR: 116 dB
•
RRO–rail-to-railoutput
• Inputvoltagerange:–0.2Vto3.9V
(5 V supply)
•
Operatingtemperaturerange:
–40°C to 125°C
Applications
• Consumerelectronics
• High-speeddataacquisitionand
generation
•
Medicalequipment
• Motorcontrol
• Smartmeters
-140
-120
-100
-80
-60
-40
-20
0
0
Frequency (Hz)
cBd
-
A
NI
2.7 V
ADS8326
+In
-In
100
2.2 nF
1 k
1 k
V
IN
OPA835
V
S-
1 k
2 k
2 k
2.5 V5 V
V
S+
V
DD
REF
2.7 V
0V
V
SIG
1.35 V
V
SIG
20,000 60,000 80,000
100,000
40,000 120,000
Get more information: www.ti.com/product/LMH6881
2.4 GHz Programmable Differential Amplifier with Gain Control
LMH6881
The LMH6881 is a high-speed, high-performance, programmable differential amplifier.
With a bandwidth of 2.4 GHz and high linearity of 44 dBm OIP3, it is suitable for a wide
variety of signal conditioning applications.
The LMH6881 programmable differential amplifier family combines the best of both fully
differential amplifiers and variable gain amplifiers. It offers superior noise and distortion
performance over the entire gain range without external resistors, enabling the use of
just one device and one design for multiple applications requiring different gain settings.
LMH6881 functional block diagram
Key Features
• Smallsignalbandwidth:2400MHz
• OIP3at100MHz:44dBm
• HD3at100MHz:−100dBc
• Noisefigure:9.7dB
• Voltagegainrange:26dBto6dB
• Voltagegainstepsize0.25dB
• Inputimpedance100Ω
• Parallelandserialgaincontrol
• Powerdowncapability
Applications
• Medicalequipment
• Military:sonarandradar
• Point-to-pointmicrowavebackhaul
• Telecomtower:remoteradiounit(RRU)
• Smartmeters