Electronic Components Datasheet Search |
|
OPA132UA Datasheet(PDF) 7 Page - Burr-Brown (TI) |
|
|
OPA132UA Datasheet(HTML) 7 Page - Burr-Brown (TI) |
7 / 14 page OPA132, 2132, 4132 7 SBOS054A www.ti.com APPLICATIONS INFORMATION OPA132 series op amps are unity-gain stable and suitable for a wide range of general-purpose applications. Power supply pins should be bypassed with 10nF ceramic capaci- tors or larger. OPA132 op amps are free from unexpected output phase- reversal common with FET op amps. Many FET-input op amps exhibit phase-reversal of the output when the input common-mode voltage range is exceeded. This can occur in voltage-follower circuits, causing serious problems in control loop applications. OPA132 series op amps are free from this undesirable behavior. All circuitry is completely independent in dual and quad versions, assuring normal behavior when one amplifier in a package is overdriven or short-circuited. OPERATING VOLTAGE OPA132 series op amps operate with power supplies from ±2.5V to ±18V with excellent performance. Although specifications are production tested with ±15V supplies, most behavior remains unchanged throughout the full operating voltage range. Parameters which vary signifi- cantly with operating voltage are shown in the typical performance curves. OFFSET VOLTAGE TRIM Offset voltage of OPA132 series amplifiers is laser trimmed and usually requires no user adjustment. The OPA132 (single op amp version) provides offset voltage trim con- nections on pins 1 and 8. Offset voltage can be adjusted by connecting a potentiometer as shown in Figure 1. This adjustment should be used only to null the offset of the op amp, not to adjust system offset or offset produced by the signal source. Nulling offset could degrade the offset voltage drift behavior of the op amp. While it is not possible to predict the exact change in drift, the effect is usually small. FIGURE 1. OPA132 Offset Voltage Trim Circuit. INPUT BIAS CURRENT The FET-inputs of the OPA132 series provide very low input bias current and cause negligible errors in most appli- cations. For applications where low input bias current is crucial, junction temperature rise should be minimized. The input bias current of FET-input op amps increases with temperature as shown in the typical performance curve “Input Bias Current vs Temperature.” The OPA132 series may be operated at reduced power supply voltage to minimize power dissipation and tempera- ture rise. Using ±3V supplies reduces power dissipation to one-fifth that at ±15V. The dual and quad versions have higher total power dissipa- tion than the single, leading to higher junction temperature. Thus, a warmed-up quad will have higher input bias current than a warmed-up single. Furthermore, an SOIC will gener- ally have higher junction temperature than a DIP at the same ambient temperature because of a larger θ JA. Refer to the specifications table. Circuit board layout can also help minimize junction tem- perature rise. Temperature rise can be minimized by solder- ing the devices to the circuit board rather than using a socket. Wide copper traces will also help dissipate the heat by acting as an additional heat sink. Input stage cascode circuitry assures that the input bias current remains virtually unchanged throughout the full input common-mode range of the OPA132 series. See the typical performance curve “Input Bias Current vs Common- Mode Voltage.” V+ V– 100k Ω OPA132 single op amp only. Use offset adjust pins only to null offset voltage of op amp—see text. Trim Range: ±4mV typ OPA132 6 7 8 4 3 2 1 10nF 10nF |
Similar Part No. - OPA132UA |
|
Similar Description - OPA132UA |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List 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 |