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TSH31ID
280 MHZ BANDWIDTH MOS INPUT SINGLE OP-AMPS
VERY LOW INPUT CURRENT : 2pA typ GAIN BANDWIDTH PRODUCT : 280MHz GAIN OF 2 STABILITY SLEW RATE : 300V/μs STANDARD PIN OUT
DESCRIPTION The TSH31 is a low cost wide bandwidth single
operational amplifier featuring extremely low input
current of 2pA typ.
Other features as high slew rate, fast settling time
and high linearity make it suitable for many appli-
cations requiring speed and very high input im-
pedance as photo cell amplifier, Fet probe, high
speed precision integrator, sample and hold cir-
cuit.
ORDER CODE
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
PIN CONNECTIONS (top view)
TSH31280MHz BANDWIDTH MOS INPUT
SINGLE OPERATIONAL AMPLIFIER
TSH31
SCHEMATIC DIAGRAM
INPUT OFFSET VOLTAGE NULL CIRCUIT
MAXIMUM RATINGS
OPERATING CONDITIONS
TSH31
ELECTRICAL CHARACTERISTICSVCC = ±5V, Tamb = 25°C (unless otherwise specified)
TSH31
EVALUATION CIRCUIT
PRINTED CIRCUIT LAYOUTAs for any high frequency device, a few rules must
be observed when designing the PCB to get the
best performances from this high speed op amp.
From the most to the least important points : Each power supply lead has to be by-
passed to ground with a 10nF ceramic ca-
pacitor very close to the device and a 10μF
tantalum capacitor. To provide low inductance and low resist-
ance common return, use a ground plane
or common point return for power and sig-
nal. All leads must be wide and as short as pos-
sible especially for op amp inputs. This is in
order to decrease parasitic capacitance
and inductance. Use small resistor values to decrease time
constant with parasitic capacitance. Choose component sizes as small as pos-
sible (SMD). On output, decrease capacitor load so as
to avoid circuit stability being degraded
which may cause oscillation. You can also
add a serial resistor in order to minimise its
influence. One can add in parallel with feedback re-
sistor a few pF ceramic capacitor CF adjust-
ed to optimize the settling time.
TSH31
.
or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics.
Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all
information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support
devices or systems without express written approval of STMicroelectronics.
© The ST logo is a registered trademark of STMicroelectronics
© 2000 STMicroelectronics - Printed in Italy - All Rights Reserved
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PACKAGE MECHANICAL DATA8 PINS - PLASTIC MICROPACKAGE (SO)
:
www.ic-phoenix.com
.
