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DATA-SHEET
MTI04Bx / MTI08Bx
MULTI-CHANNEL PROGRAMMABLE GAIN TRANSIMPEDANCE AMPLIFIER
Contents 1. GENERAL DESCRIPTION 2. BLOCK DIAGRAM 3. DESCRIPTION OF INTERFACE 3.1 Pinning 3.2 Adjustment of Transimpedance 4. DESCRIPTION OF FUNCTION 5. ELECTRICAL CHARACTERISTICS 5.1 Absolute Maximum Ratings 5.2 Operating Conditions 5.3 AC/DC-Characteristics
5.3.1 Offset Voltage At Input INX 5.3.2 Leakage Current At Input INX 5.3.3 DC-Transfer-Curves
2 2 3 3 3 3 3 3 4 4
5 6 7
6. PACKAGES 6.1 Shape and Dimensions 6.2 Pin-Configuration 7. APPLICATIONS 7.1 Example for Position Measurement 7.2 Connection of A Colour Sensor 8. ORDERING INFORMATION 9. CONTACT
8 8 8 9 9 9 10 10
Distributor: Laser Components Instrument Group, Wilmington MA, Phone: 978 658 9100, www.laser-components.com
The information disclosed herein was originated by and is the property of MAZeT. MAZeT reserves all patent, proprietary, design, use, sales, manufacturing an reproduction rights thereto. Product names used in this publication are for identification purposes only and may be trademark of their respective companies.
REVISIONS
NO 1 VERSION V 1.4 APPROVED 2001-08-27
1. GENERAL DESCRIPTION
The MTI-devices are a family of integrated circuits of programmable gain transimpedance amplifiers with different numbers of channels (4 or 8). The MTI-devices are mainly used for signal conditioning of sensors with current outputs. They are especially suitable for connection of photodiodes of array and row sensors. The possibility to adjust the transimpedance in 3 stages is a special feature. The adjustment is made by programming two pins and is valid for all channels together. The device packages are optimized for COB-mounting.
2. BLOCK DIAGRAM
VDD GND SW1 SW2
Cc
Rf
50k - 150k
IN1 OPAMP 1 VREF
GND
OUT1
Cc
Rf
INX OPAMP X OUTX
MTI
Sheet 2 of 10
Distributor: Laser Components Instrument Group, Wilmington MA, Phone: 978 658 9100, www.laser-components.com
3. DESCRIPTION OF INTERFACE
3.1 Pinning
signal name
VDD GND SW1 SW2 INX OUTX
a.) analog or digital
Typ.
input input input input input output
a/da
a/d a/d d d a a
function
power supply (+) power supply (-) input 1 for adjustment of transimpedance of MTIamplifier (pull down) input 2 for adjustment of transimpedance of MTIamplifier (pull down) analog current input of amplifier X analog voltage output of amplifier X
3.2 Adjustment Of Transimpedance
settings of digital inputs SW1 SW2
GND VDD GND VDD
a.) default by pull down
transimpedance Rf
5M - stage 1 500k - stage 2 25ka - stage 3 not used
VDD GND GND VDD
4. DESCRIPTION OF FUNCTION
The MTI-devices are programmable gain transimpedance amplifiers with different numbers of channels (MTI04 - 4 channels; MTI08 - 8 channels). There is one transimpedance amplifier per channel between a current input INX and a voltage output OUTX. Its transimpedance is selectable in 3 stages. This adjustment can be effected by setting of digital inputs SW1 and SW2 and is valid for all channels simultaneously (headline 3.2). The inputs SW1 and SW2 are pulled down with a resistor for a default feedback resistor of 25k. The second input of all transimpedance amplifiers is used for a common supply by a reference voltage necessarily fed in through the pin VREF. All channels are compensated for an external input capacitance of the photo-sensor of typical 20pF. The power supply for the MTI-devices is typical 5V between VDD and GND.
5. ELECTRICAL CHARACTERISTICS
5.1 Absolute Maximum Ratings Violations of absolute maximum ratings are not allowed under any circumstances. All voltages are referenced to VSS = 0V. parameter
power supply input and output voltages power dissipation operating temperature storage temperature
name
VDD IC-pinning POP TOP TSTG
min.
-0,3 -0,3 0 -55
max.
7,0 VDD + 0,3 0,1 85 155
unit
V V W C C
Sheet 3 of 10
Distributor: Laser Components Instrument Group, Wilmington MA, Phone: 978 658 9100, www.laser-components.com
5.2 Operating Conditions All voltages are referenced to VSS = 0V. parameter
supply voltage Bias current MTI04 Bias current MTI08 operating temperature input high level input low level reference voltage
name
VDD I(VDD) I(VDD) TOP VIH VIL VREF
min.
4,5 3 12 0 2,0 -0,3 1
typ.
5
max.
5,5 4 16 85 VDD+0,3 0,8 4
unit
V mA mA C V V V
condition
27C 27C
27
2,5
5.3 AC/DC-Characteristics Unless otherwise specified the data in this table is valid for TOP = 27C and VDD = 5V. parameter
input current feedback resistor
name
INX Rf
min.
typ.
0,1 1 20 5000 500 25 25 70 500 -3500
max.
unit
A A A k k k kHz kHz kHz ppm/K mV pA pF nV/Hz pA/ Hz k pF
condition
stage 1 stage 2 stage 3 stage 1 stage 2 stage 3 stage 1 stage 2 stage 3 TOP = 85C TOP = 85C ILOAD = 0,5mA f = 1kHz f = 1kHz
4000 400 20
6000 600 30
signal frequency at input temperature coefficient of the feedback resistor input offset voltage input leakage current capacitive load at OUTX output voltage noise equivalent input current noise pull down resistor at SW1 and SW2 input capacitance of external connected photosensors
f3dB TCRf VOFF ILEAK CLOAD VNOISE INOISE RPDSW CDIODE 50
8 500 50 tbd tbd
20
per input
Sheet 4 of 10
Distributor: Laser Components Instrument Group, Wilmington MA, Phone: 978 658 9100, www.laser-components.com
5.3.1 Offset Voltage At Input INX
Offset Voltage Voff = f(VREF) -- Temp = 0C
8 7 6
Voff -- mV
5 4 3 2 1 0 0 1 2 3 VREF -- V 4 5 6
VDD = 4.5V VDD = 5.0V VDD = 5.5V
Offset Voltage Voff = f(VREF) -- Temp = 27C
8 7 6
Voff -- mV
5 4 3 2 1 0 0 1 2 3 VREF -- V 4 5 6
VDD = 4.5V VDD = 5.0V VDD = 5.5V
Offset Voltage Voff = f(VREF) -- Temp = 85C
8 7 6
Voff -- mV
5 4 3 2 1 0 0 1 2 3 VREF -- V 4 5 6
VDD = 4.5V VDD = 5.0V VDD = 5.5V
Sheet 5 of 10
Distributor: Laser Components Instrument Group, Wilmington MA, Phone: 978 658 9100, www.laser-components.com
5.3.2 Leakage Current At Input INX
Leakage Current Ileak = f(VREF) -- Temp = 0C
50 25
Ileak -- pA
0 -25 -50 0 2 VREF -- V 4 6
VDD = 4.5V VDD = 5.0V VDD = 5.5V
Leakage Current Ileak = f(VREF) -- Temp = 27C
50 25
Ileak -- pA
0 -25 -50 0 2 VREF -- V 4 6
VDD = 4.5V VDD = 5.0V VDD = 5.5V
Leakage Current Ileak = f(VREF) -- Temp = 85C
500 400
Ileak -- pA
300 200 100 0 -100 0 2 VREF -- V 4 6
VDD = 4.5V VDD = 5.0V VDD = 5.5V
Sheet 6 of 10
Distributor: Laser Components Instrument Group, Wilmington MA, Phone: 978 658 9100, www.laser-components.com
5.3.3 DC-Transfer-Curves
DC-Transfer-Curve V(OUTX) = f(I(INX)) -- Rf = 25kOhms 6 5
V(OUTX) -- V
4 3 2 1 0 -1 -60 -40 -20 0 I(INX) -- A 20 40 60
VREF = 1.0V Temp = 0C VREF = 2.5V Temp = 0C VREF = 4.0V Temp = 0C VREF = 1.0V Temp = 27C VREF = 2.5V Temp = 27C VREF = 4.0V Temp = 27C VREF = 1.0V Temp = 85C VREF = 2.5V Temp = 85C VREF = 4.0V Temp = 85C
DC-Transfer-Curve V(OUTX) = f(I(INX)) -- Rf = 500kOhms 6 5
V(OUTX) -- V
4 3 2 1 0 -1 -3 -2 -1 0 I(INX) -- A 1 2 3
VREF = 1.0V Temp = 0C VREF = 2.5V Temp = 0C VREF = 4.0V Temp = 0C VREF = 1.0V Temp = 27C VREF = 2.5V Temp = 27C VREF = 4.0V Temp = 27C VREF = 1.0V Temp = 85C VREF = 2.5V Temp = 85C VREF = 4.0V Temp = 85C
DC-Transfer-Curve V(OUTX) = f(I(INX)) -- Rf = 5MOhms 6 5
V(OUTX) -- V
4 3 2 1 0 -1 -300 -200 -100 0 100 200 300
VREF = 1.0V Temp = 0C VREF = 2.5V Temp = 0C VREF = 4.0V Temp = 0C VREF = 1.0V Temp = 27C VREF = 2.5V Temp = 27C VREF = 4.0V Temp = 27C VREF = 1.0V Temp = 85C VREF = 2.5V Temp = 85C VREF = 4.0V Temp = 85C
I(INX) -- nA
Sheet 7 of 10
Distributor: Laser Components Instrument Group, Wilmington MA, Phone: 978 658 9100, www.laser-components.com
6. PACKAGES
6.1 Shape and Dimensions
tapered edge
1 A
1)
A L
w
e D
b
E
H
1) As shown in the figure PIN 1 is located on the bottom of the left corner of the outline.
PIN 1
dimensions - mm
TYP MTI04BS MTI04BQ MTI08BS MTI08BQ PACKAGE SOP16 QSOP16 SOP28L QSOP28L D 9,90 4,90 17,90 9,9 E 3,80 3,80 7,49 3,8 H 6,00 6,00 10,31 6,0 A 1,75 1,75 2,54 1,75 A1 0,15 0,15 0,20 0,15 e 1,27 0,635 1,27 0,635 b 0,41 0,38 0,41 0,38 L 0,72 0,72 0,76 0,72 w 4 4 4 4
6.2 Pin-Configuration
VREF SW1 GND IN1 IN2 IN3 IN4 NC SW2 VDD NC OUT1 OUT2 OUT3 OUT4 NC VREF SW1 GND IN1 IN2 IN3 IN4 IN5 IN6 IN7 IN8 NC NC NC SW2 VDD NC OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 OUT8 NC NC NC
1 2 3 4 5 6 7 8 Rf = f(SW1, SW2)
16 15 14 13 12 11 10 9
1 2 3 4 5 6 7 8 9 10 11 12 13 14 Rf = f(SW1, SW2)
28 27 26 25 24 23 22 21 20 19 18 17 16 15
MTI04Bx
TOP VIEW (not to scale)
MTI08Bx
TOP VIEW (not to scale)
SOP16 QSOP16
SOP28 QSOP28
NC = NO CONNECT
Sheet 8 of 10
Distributor: Laser Components Instrument Group, Wilmington MA, Phone: 978 658 9100, www.laser-components.com
7. APPLICATIONS
7.1 Example For Position Measurement
LIGHT SOURCE
MOVING APERTURE
PHOTO SENSOR ROW PHOTO CURRENT
Rf OUTPUT VOLTAGE A/D-CONVERTER
MTI08 transimpedance amplifier
DATA STREAM LOGIC FOR SIGNAL PROCESSING
7.2 Connection Of A Colour Sensor
5V 10 k 15 k 1 S1 2 3 4 5 6 7 8 MTI04 16 15 14 13 12 11 10 9 S2 V(OUTX)
1 2 3 4
MCS3
8 7 6
colour sensor
5
Sheet 9 of 10
Distributor: Laser Components Instrument Group, Wilmington MA, Phone: 978 658 9100, www.laser-components.com
8. ORDERING INFORMATION
NAME OF PRODUCT MTI04BS MTI04BQ MTI08BS MTI08BQ PACKAGE SOP16 QSOP16 SOP28 QSOP28 NUMBER OF CHANNELS 4 4 8 8
9. CONTACT
For further information, please feel free to contact:
LASER COMPONENTS GmbH Werner-von-Siemens-Str. 15 D-82140 Olching / Germany Telefon + 4 9 (0) 81 42 / 28 64 0 Telefax + 4 9 (0) 81 42 / 28 64 11 E-Mail: info@lasercomponents.com www.lasercomponents.com
LASER COMPONENTS Instrument Group, Inc. 10 Upton Drive USA 01887 Wilmington, MA Phone: +1 978 6589 100 Fax: +1 978 6581 888 E-Mail: erenfer@laser-components.com www.laser-components.com
Sheet 10 of 10
Distributor: Laser Components Instrument Group, Wilmington MA, Phone: 978 658 9100, www.laser-components.com
Issue: 04/02 / V2 / pdf / mazet / mti04bx.pdf

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