Datasheet TSH31IN, TSH31ID, TSH31 Datasheet (SGS Thomson Microelectronics)

TSH31

280MHz BANDWIDTH MOS INPUT

SINGLE OPERATIONALAMPLIFIER

June 1998



ORDERCODES

Part

Number

Temperature

Range

Package

ND

TSH31I -40

o

C, 125oC ••

TSH31-01.TBL

1
2
3
4

8

6
5

7

Inverting Input

Non-inverting Input

Output

Offset Null2

Offset Null1

N.C.

V

CC

V

CC

+

TSH31-01.EPS

PIN CONNECTIONS (top view)

.VERY LOWINPUT CURRENT : 2pA typ

.GAIN BANDWIDTH PRODUCT : 280MHz

.GAIN OF2 STABILITY

.SLEW RATE : 300V/µs

.STANDARDPIN OUT

D

SO8

(Plastic Micropackage)

N

DIP8

(Plastic Package)

DESCRIPTION

The TSH31 is a low cost wide bandwidth single
operationalamplifier featuring extremelylow input
currentof2pAtyp.Otherfeaturesashighslewrate,
fast settlingtime andhigh linearity makeit suitable
for many applications requiring speed and very
high input impedance as photo cell amplifier, Fet
probe, highspeedprecisionintegrator,sample and
hold circuit...

1/6

3

noninverting

input

2

inverting

input

1

8

Offset N1

Offse t N2

7V

CC

+

C

c

6

output

Internal

V

CC

-

4

V

ref

TSH31-02.EPS

SCHEMATICDIAGRAM

ABSOLUTEMAXIMUMRATINGS

Symbol Parameter Value Unit

V

CC

Supply Voltage ± 7V

V

id

Differential Input Voltage ± 5V

V

i

Input Voltage Range ± 5V

I

in

Current On Offset Null Pins ± 20 mA

T

oper

Operating Free-AirTemperatureRange TSH31C

TSH31I

0oC +70

-40

o

C +125

oC

TSH31-02.TBL

N1

N2

TSH31

100kΩ

V

CC

TSH31-03.EPS

INPUT OFFSET VOLTAGENULL CIRCUIT

OPERATINGCONDITIONS

Symbol Parameter Value Unit

V

CC

Supply Voltage ± 3to±6V

V

ic

Common Mode InputVoltageRange V

CC

-

to V

CC+

-3 V

TSH31-03.TBL

TSH31

2/6

ELECTRICALCHARACTERISTICS

V

CC

= ± 5V, T

amb

=25oC (unlessotherwisespecified)

Symbol Parameter Min. Typ. Max. Unit

V

io

Input OffsetVoltage 3 15 mV

DV

io

Input OffsetVoltage Drift

T

min

≤ T

amb

≤ T

max

20

µV/

o

C

I

ib

Input BiasCurrent 2 300 pA

I

io

Input OffsetCurrent 2 200 pA

I

CC

Supply Current, no load VCC= ± 5V 20 40 mA

A

vd

Large Signal VoltageGain

V

o

= ±2.5V RL= 100Ω 200 800

V/V

V

icm

Input Common ModeVoltageRange -5 to+2 -5.5 to+2.5 V

CMR Common Mode Rejection Ratio V

ic=Vicm min.

55 95 dB

SVR Supply Voltage Rejection Ratio

V

CC

= ± 5V to± 3V 45 65

dB

V

o

Output Voltage RL= 100Ω ± 2.5 +3.5

-3.7

V

I

o

Output ShortCircuit Current

V

id

= ±1V, Vo=0V ±70

mA

GBP Gain BandwidthProduct

A

VCL

= 100, RL= 100Ω, f = 7.5MHz 280

MHz

SR Slew Rate

V

in

= ± 2V,A

VCL

=1,RL= 100Ω 300

V/µs

e

n

Equivalent Input Voltage Noise f = 1MHz 20

nV

√Hz

∅m Phase Margin

A

VM

=1,RL= 100Ω,CL= 15pF 40

Degrees

TSH31-04.TBL

TSH31

3/6

Input

50

Ω

1k

Ω

10nF

10µF

C

F

-5V

+5V

10nF

Output

50

Ω

10µF

1k

Ω

TSH31-04.EPS

EVALUATIONCIRCUIT

As for any high frequency device, a fewrules must
be observedwhendesigningthe PCBto getthe best
performancesfrom this high speedop amp.

From the most to theleast important points :

• Each power supply lead has to be bypassed
to groundwith a 10nF ceramiccapacitor very
close to the device and a 10µF tantalum ca­pacitor.

• Toprovide low inductanceand low resistance
common return, use a ground plane or com­mon point return for power andsignal.

• Allleads mustbe wideand as shortas possi­ble especially for op amp inputs. This is in
order to decrease parasitic capacitance and

inductance.

• Use small resistor values to decrease time
constantwith parasiticcapacitance.

• Choosecomponentsizesassmall aspossible
(SMD).

• On output, decrease capacitor load so as to
avoid circuit stability being degraded which
may cause oscillation. One can also add a
serial resistor in order to minimise its influ­ence.

• One canadd inparallelwith feedbackresistor
a few pF ceramic capacitor C

F

adjusted to

optimizethe settlingtime.

PRINTEDCIRCUIT LAYOUT

TSH31

4/6

PM-DIP8.EPS

PACKAGEMECHANICAL DATA

8 PINS- PLASTICDIP

Dimensions

Millimeters Inches

Min. Typ. Max. Min. Typ. Max.

A 3.32 0.131

a1 0.51 0.020

B 1.15 1.65 0.045 0.065
b 0.356 0.55 0.014 0.022

b1 0.204 0.304 0.008 0.012

D 10.92 0.430
E 7.95 9.75 0.313 0.384

e 2.54 0.100
e3 7.62 0.300
e4 7.62 0.300

F 6.6 0260

i 5.08 0.200
L 3.18 3.81 0.125 0.150
Z 1.52 0.060

DIP8.TBL

TSH31

5/6

PM-SO8.EPS

PACKAGEMECHANICAL DATA

8 PINS- PLASTICMICROPACKAGE(SO)

Dimensions

Millimeters Inches

Min. Typ. Max. Min. Typ. Max.

A 1.75 0.069

a1 0.1 0.25 0.004 0.010
a2 1.65 0.065
a3 0.65 0.85 0.026 0.033

b 0.35 0.48 0.014 0.019

b1 0.19 0.25 0.007 0.010

C 0.25 0.5 0.010 0.020

c1 45

o

(typ.)
D 4.8 5.0 0.189 0.197
E 5.8 6.2 0.228 0.244
e 1.27 0.050

e3 3.81 0.150

F 3.8 4.0 0.150 0.157
L 0.4 1.27 0.016 0.050

M 0.6 0.024

S8

o

(max.)

SO8.TBL

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ORDERCODE :

TSH31

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