OPA2834 Amplifier Datasheet

OPA2834 Datasheet PDF, Equivalent


Part Number

OPA2834

Description

Voltage-Feedback Amplifier

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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OPA2834
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OPA2834
SBOS973A – JUNE 2019 – REVISED SEPTEMBER 2019
OPA2834 50-MHz, 170-µA, Negative-Rail In, Rail-to-Rail Out, Voltage-Feedback Amplifier
1 Features
1 Ultra-low power:
– Supply voltage: 2.7 V to 5.4 V
– Quiescent current (IQ): 170 µA/ch (typical)
• Bandwidth: 50 MHz (G = 1 V/V)
• Slew rate: 26 V/µs
• Settling time (0.1%): 88 ns (2-VSTEP)
• HD2, HD3: –131 dBc, –146 dBc at 10 kHz (2 VPP)
• Input voltage noise: 12 nV/Hz (f = 10 kHz)
• Input offset voltage: 350 µV (±1.9 mV max)
• Negative rail input, rail-to-rail output (RRO)
– Input voltage range: –0.2 V to 3.9 V
(5-V supply)
• Operating temperature range:
–40°C to +125°C
2 Applications
• Current sensing in power supplies
• Low-power signal conditioning
• Battery-powered applications
• Portable voice recorders
• Low-power SAR and ΔΣ ADC driver
• Portable devices
3 Description
The OPA2834 is a dual-channel, ultra-low-power, rail-
to-rail output, negative-rail input, voltage-feedback
(VFB) operational amplifier designed to operate over
a power-supply range of 2.7 V to 5.4 V with a single
supply, or ±1.35 V to ±2.7 V with a dual supply.
Consuming only 170 µA per channel and with a unity-
gain bandwidth of 50 MHz, this amplifier sets an
industry-leading performance-to-power ratio for rail-
to-rail amplifiers.
For battery-powered and portable applications where
low power consumption is of key importance, the
OPA2834 offers an excellent bandwidth to IQ ratio.
OPA2834 offers very low distortion making it very
suitable for data acquisition systems and microphone
pre-amplifier.
See the Device Comparison Table for a selection of
low-power, low-noise, 5-V amplifiers from Texas
Instruments with a gain-bandwidth product from
20 MHz to 300 MHz.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
OPA2834
VSSOP (8)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
1-kHz FFT Plot
(VOUT = 1 VRMS, RL = 100 kΩ, G = 1)
40
20
0
-20
-40
-60
-80
-100
-120
-140
-160
0
2k 4k 6k 8k 10k 12k 14k 16k 18k 20k
Frequency (Hz)
FFT_
Low-Side, Current-Shunt Monitoring
LOAD
RSH
RF
RGVS
±
VS
±
REXT
RG+
+ OPA2834-1
OPA2834-2
RF
VREF
Interrupt
µC
Short-
Circuit Fault
+
Detection TLV3201
±
VS
VTH
ADS7056
CEXT
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.

OPA2834
OPA2834
SBOS973A – JUNE 2019 – REVISED SEPTEMBER 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Comparison Table..................................... 3
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4
7.2 ESD Ratings.............................................................. 4
7.3 Recommended Operating Conditions....................... 4
7.4 Thermal Information .................................................. 4
7.5 Electrical Characteristics: 3V to 5V........................... 5
7.6 Typical Characteristics: Vs = 5 V .............................. 6
7.7 Typical Characteristics: VS = 3.0 V ........................... 9
7.8 Typical Characteristics: ±2.5-V to ±1.5-V Split
Supply ...................................................................... 12
8 Detailed Description ............................................ 15
8.1 Overview ................................................................. 15
8.2 Functional Block Diagrams ..................................... 15
8.3 Feature Description................................................. 15
8.4 Device Functional Modes........................................ 17
9 Application and Implementation ........................ 20
9.1 Application Information............................................ 21
9.2 Typical Applications ................................................ 21
10 Power Supply Recommendations ..................... 25
11 Layout................................................................... 26
11.1 Layout Guidelines ................................................. 26
11.2 Layout Examples................................................... 26
12 Device and Documentation Support ................. 27
12.1 Documentation Support ........................................ 27
12.2 Receiving Notification of Documentation Updates 27
12.3 Community Resources.......................................... 27
12.4 Trademarks ........................................................... 27
12.5 Electrostatic Discharge Caution ............................ 27
12.6 Glossary ................................................................ 27
13 Mechanical, Packaging, and Orderable
Information ........................................................... 27
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Original (June 2019) to Revision A
Page
• Changed document status from APL to production data ...................................................................................................... 1
2 Submit Documentation Feedback
Product Folder Links: OPA2834
Copyright © 2019, Texas Instruments Incorporated


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity OPA2834 SBOS973A – JUNE 2019 – REVISED SEPTEMBER 2019 OPA2834 50-M Hz, 170-µA, Negative-Rail In, Rail-to- Rail Out, Voltage-Feedback Amplifier 1 Features •1 Ultra-low power: – Sup ply voltage: 2.7 V to 5.4 V – Quiesce nt current (IQ): 170 µA/ch (typical) Bandwidth: 50 MHz (G = 1 V/V) • Sl ew rate: 26 V/µs • Settling time (0. 1%): 88 ns (2-VSTEP) • HD2, HD3: –1 31 dBc, –146 dBc at 10 kHz (2 VPP) Input voltage noise: 12 nV/√Hz (f = 10 kHz) • Input offset voltage: 350 µV (±1.9 mV max) • Negative rail in put, rail-to-rail output (RRO) – Inpu t voltage range: –0.2 V to 3.9 V (5-V supply) • Operating temperature rang e: –40°C to +125°C 2 Applications Current sensing in power supplies Low-power signal conditioning • Bat tery-powered applications • Portable voice recorders • Low-power SAR and Σ ADC driver • Portable devices 3 Description The OPA2834 is a dual-channel, ultra-low-power, railto-rail output, neg.
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