データシートサーチシステム |
|
LMH6628WG-QML データシート(PDF) 10 Page - Texas Instruments |
|
|
LMH6628WG-QML データシート(HTML) 10 Page - Texas Instruments |
10 / 20 page LM7121 LMH6628 LMH6628 VIN 499: 499: 499: 499: VOUT Rf C R C R - + - + + - ½ ½ LMH6628QML SNOSAQ1B – DECEMBER 2010 – REVISED MAY 2013 www.ti.com APPLICATION SECTION LOW NOISE DESIGN Ultimate low noise performance from circuit designs using the LMH6628 requires the proper selection of external resistors. By selecting appropriate low valued resistors for RF and RG, amplifier circuits using the LMH6628 can achieve output noise that is approximately the equivalent voltage input noise of 2nV/ √Hz multiplied by the desired gain (AV). DC BIAS CURRENTS AND OFFSET VOLTAGES Cancellation of the output offset voltage due to input bias currents is possible with the LMH6628. This is done by making the resistance seen from the inverting and non-inverting inputs equal. Once done, the residual output offset voltage will be the input offset voltage (VOS) multiplied by the desired gain (AV). Texas Application Note OA-07 offers several solutions to further reduce the output offset. OUTPUT AND SUPPLY CONSIDERATIONS With ±5V supplies, the LMH6628 is capable of a typical output swing of ±3.8V under a no-load condition. Additional output swing is possible with slightly higher supply voltages. For loads of less than 50 Ω, the output swing will be limited by the LMH6628's output current capability, typically 85mA. Output settling time when driving capacitive loads can be improved by the use of a series output resistor. See the plot labeled Figure 23 in the TYPICAL PERFORMANCE CHARACTERISTICS. LAYOUT Proper power supply bypassing is critical to insure good high frequency performance and low noise. De-coupling capacitors of 0.1 μF should be placed as close as possible to the power supply pins. The use of surface mounted capacitors is recommended due to their low series inductance. A good high frequency layout will keep power supply and ground traces away from the inverting input and output pins. Parasitic capacitance from these nodes to ground causes frequency response peaking and possible circuit oscillation. See OA-15 for more information. Texas Instruments suggests the LMH730036 (SOIC) dual op amp evaluation board as a guide for high frequency layout and as an aid in device evaluation. ANALOG DELAY CIRCUIT (ALL-PASS NETWORK) The circuit in Figure 29 implements an all-pass network using the LMH6628. A wide bandwidth buffer (LM7121) drives the circuit and provides a high input impedance for the source. As shown in Figure 30, the circuit provides a 13.1ns delay (with R = 40.2 Ω, C = 47pF). RF and RG should be of equal and low value for parasitic insensitive operation. Figure 29. Circuit That Implements an All-pass Network Using the LMH6628 10 Submit Documentation Feedback Copyright © 2010–2013, Texas Instruments Incorporated Product Folder Links: LMH6628QML |
同様の部品番号 - LMH6628WG-QML |
|
同様の説明 - LMH6628WG-QML |
|
|
リンク URL |
プライバシーポリシー |
ALLDATASHEET.JP |
ALLDATASHEETはお客様のビジネスに役立ちますか? [ DONATE ] |
Alldatasheetは | 広告 | お問い合わせ | プライバシーポリシー | リンク交換 | メーカーリスト All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |