|
|
PDF OPA121 Data sheet ( Hoja de datos )
| Número de pieza | OPA121 | |
| Descripción | Low Cost Precision Difet OPERATIONAL AMPLIFIER | |
| Fabricantes | Burr-Brown | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de OPA121 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
|
No Preview Available !
® OPA121
Low Cost Precision Difet ®
OPERATIONAL AMPLIFIER
FEATURES
q LOW NOISE: 6nV/√Hz typ at 10kHz
q LOW BIAS CURRENT: 5pA max
q LOW OFFSET: 2mV max
q LOW DRIFT: 3µV/°C typ
q HIGH OPEN-LOOP GAIN: 110dB min
q HIGH COMMON-MODE
REJECTION: 86dB min
DESCRIPTION
The OPA121 is a precision monolithic dielectrically-
isolated FET (Difet ®) operational amplifier. Out-
standing performance characteristics are now
available for low-cost applications.
Noise, bias current, voltage offset, drift, open-loop
gain, common-mode rejection, and power supply
rejection are superior to BIFET® amplifiers.
Very low bias current is obtained by dielectric
isolation with on-chip guarding.
Laser-trimming of thin-film resistors gives very low
offset and drift. Extremely low noise is achieved with
new circuit design techniques (patented). A new
cascode design allows high precision input specifica-
tions and reduced susceptibility to flicker noise.
Standard 741 pin configuration allows upgrading of
existing designs to higher performance levels.
APPLICATIONS
q OPTOELECTRONICS
q DATA ACQUISITION
q TEST EQUIPMENT
q MEDICAL EQUIPMENT
q RADIATION HARD EQUIPMENT
Case (TO-99) and Substrate
8
–In
2
3
+In
Noise-Free
Cascode*
Trim 10kΩ
1
5
Trim 10kΩ
2kΩ
2kΩ
2kΩ
2kΩ
*Patented
OPA121 Simplified Circuit
7
+VCC
6
Output
4
–VCC
Difet ®, Burr-Brown Corp.
BIFET®, National Semiconductor Corp.
International Airport Industrial Park • Mailing Address: PO Box 11400 • Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd. • Tucson, AZ 85706
Tel: (520) 746-1111 • Twx: 910-952-1111 • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
© 1984 Burr-Brown Corporation
PDS-539F
Printed in U.S.A. September, 1993
1 page  
TYPICAL PERFORMANCE CURVES (CONT)
TA = +25°C, VCC = ±15VDC unless otherwise noted.
LARGE SIGNAL TRANSIENT RESPONSE
+15
SMALL SIGNAL TRANSIENT RESPONSE
+80
+40
00
-15
0
25
Time(µs)
50
+40
+80
0
1
23
Time(µs)
45
INPUT CURRENTS vs INPUT VOLTAGE
WITH ±VCC PINS GROUNDED
+2
+1 IIN
V
0
Maximum Safe Current
–1
–2
–15
–10
Maximum Safe Current
–5 0 +5
Input Voltage (V)
+10 +15
APPLICATIONS INFORMATION
OFFSET VOLTAGE ADJUSTMENT
The OPA121 offset voltage is laser-trimmed and will require
no further trim for most applications. As with most ampli-
fiers, externally trimming the remaining offset can change
drift performance by about 0.3µV/°C for each 100µV of
adjusted offset. Note that the trim (Figure 1) is similar to
operational amplifiers such as 741 and AD547. The OPA121
can replace most BIFET amplifiers by leaving the external
null circuit unconnected.
INPUT PROTECTION
Conventional monolithic FET operational amplifiers require
external current-limiting resistors to protect their inputs
against destructive currents that can flow when input FET
gate-to-substrate isolation diodes are forward-biased. Most
BIFET amplifiers can be destroyed by the loss of –VCC.
Unlike BIFET amplifiers, the Difet OPA121 requires input
current limiting resistors only if its input voltage is greater
+VCC
7
2
OPA121
3
5
4
*
–VCC
6
1
±10mV Typical
Trim Range
*10k Ω to 1MΩ
Trim Potentiometer
(100kΩ Recommended)
FIGURE 1. Offset Voltage Trim.
than 6V more negative than –VCC. A 10kΩ series resistor
will limit input current to a safe level with up to ±15V input
levels even if both supply voltages are lost.
Static damage can cause subtle changes in amplifier input
characteristics without necessarily destroying the device. In
precision operational amplifiers (both bipolar and FET types),
®
5 OPA121
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet OPA121.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| OPA121 | Low Cost Precision Difet Operational Amplifier |  Texas Instruments |
| OPA121 | Low Cost Precision Difet OPERATIONAL AMPLIFIER | Burr-Brown |
| OPA124 | Low Noise Precision Difet Operational Amplifier | Texas Instruments |
| OPA124 | Low Noise Precision Difet OPERATIONAL AMPLIFIER | Burr-Brown |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |