TZA4000 pages

TZA400

Wide Dynamic Range Transimpedance Amplifier
HIGHLIGHTS

APPLICATIONS

Wide dynamic
range

6½ decades of
sensitivity

Production automation
(eg: connectorization, pigtailing)

Fine gain spacing

16 gain ranges in
1-2-5 spacing

Component testing

Small signal rise
time (10-90%)

1 µs

Noise equivalent
current (NEIRMS)

500 pA

Quality control
OEM (eg: PER measurements)

FIELDS OF APPLICATION

These amplifiers have a particularly high
sensitivity and large dynamic range. There
are 16 gain ranges covering 5 decades of
gain in a 1-2-5 pattern. The gain-to-gain
accuracy of <1% allows confident
measurements of power curves over the
full range of sensitivity of the device:
6½ decades of measurement range. Thus
even very demanding measurements such
as the accurate and high speed, real-time
determination of polarization extinction
ratio becomes a simple task.

These transimpedance amplifiers are
particularly useful for the measurement of
current from photodiodes. The output is a
voltage linearly proportional to input
current and thus, to input power in
photodiode monitoring applications. The
fast response time at high signal-noiseratio makes the TZA400 series particularly
useful in systems control feedback loops.

The TZA400 series is insensitive to
electromagnetic interference by design, an
important factor when working in „dirty“
industrial environments. These units are
provided in a modular 19“ rack mount
system. Each module comprises a 4
channel amplifier stage allowing the user
to conveniently upgrade the channel count
of an existing unit.

MEASUREMENT PRINCIPLE

TZA400englRevB.doc

This TZA400 series of amplifiers employs
precision single ended transimpedance
input stages to provide for low offset and
high linearity throughout the full dynamic
range. The single ended input stage is
required for applications where the current
source is inherently grounded externally.

Artifex Engineering
Dortmunder Str. 16-18
26723 Emden, Germany

Tel: +49-(0)4921-58908-0
Fax: +49-(0)4921-58908-29

mail: info@afx-eng.com
http://www.afx-eng.com