AME7107RCPL AME, AME7107RCPL Datasheet

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AME7107RCPL

Manufacturer Part Number
AME7107RCPL
Description
3-1/2 digit A/D converter high accuracy, low power
Manufacturer
AME
Datasheet
AME7106/AME7106A/AME7106R
AME7107/AME7107A/AME7107R
n n n n n
n n n n n
n n n n n
l 100 V Resolution
l High Impedance Differential Inputs
l Differential Reference
l Drive LCD (AME7106) or LED (AME7107)
l Four New Convenient Features
l Digital multimeter
l pH meter
l Capacitance meter
l Thermometer
l Digital Panel meter
l Photometer
Key Features
Typical Operating Circuit
Applications
Directly
(AME7106A/AME7107A)
l
l
l
l
Low-Battery Indication
Integration Status Indication
De-Integration Status Indication
Display-Hold
AME, Inc.
* For the operating circuit of the reverse-pins version, please refer
to pin configuration on page 4 and pin description on page 5 & 6
n n n n n
The AME7106 and AME7107 family are high perfor-
mance, low power, 3-1/2 digit, dual-slope integrating A/
D converters, with on-chip display drivers. The
AME7106 is designed for a single battery operated sys-
tem, will drive non-multiplexed LCD display directly.
The AME7107 is designed for a dual power supply sys-
tem, will directly drive common anode LED display.
These A/D converters are inherently versatile and ac-
curate. They are immune to the high noise environ-
ments. The true differential high impedance inputs and
differential reference are very useful for making
ratiometric measurement, such as resistance, strain
gauge and bridge transducers. The built-in auto-zero
feature automatically corrects the system offset with-
out any external adjustments.
Display-hold, low-battery flag, integration and de-inte-
gration status flags are four additional features which
are available in the 44-pin package, AME7106ACKW
and AME7107ACKW.
General Description
High Accuracy, Low Power
3-1/2 Digit A/D Converter
1

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AME7107RCPL Summary of contents

Page 1

... D converters, with on-chip display drivers. The AME7106 is designed for a single battery operated sys- tem, will drive non-multiplexed LCD display directly. The AME7107 is designed for a dual power supply sys- tem, will directly drive common anode LED display. These A/D converters are inherently versatile and ac- curate ...

Page 2

... AME, Inc. AME7106/AME7106A/AME7106R AME7107/AME7107A/AME7107R Absolute Maximum Ratings AME7106 Supply Voltage (V+ to V-) Analog Input Voltage (Either inputs) Reference Input Voltage (Either inputs) Clock Input Power Dissipation Operating Temperature Storage Temperature Lead Temperature (Soldering 60 seconds) AME7107 Supply Voltage V+ V- Analog Input Voltage (Either inputs) ...

Page 3

... Pin PDIP YYWW AME7106RCPL 40 Pin PDIP YYWW AME7106ACKW 44 Pin PQFP YYWW AME7106Y 44 Pin Dice YYWW AME7107CPL 40 Pin PDIP YYWW AME7107RCPL 40 Pin PDIP YYWW AME7107ACKW 44 Pin PQFP YYWW AME7107Y 44 Pin Dice YYWW 3-1/2 Digit A/D Converter High Accuracy, Low Power Pin Layout Temp. Range o ...

Page 4

... AME, Inc. AME7106/AME7106A/AME7106R AME7107/AME7107A/AME7107R Electrical Characteristics Unless otherwise noted, AME7106 & AME7107 are specified at T Parameter Zero Input Reading Ratiometric Reading Roll-Over Error (Difference in Reading for Equal Positive and Negative Reading Near Full-Scale) Linearity (Max. Deviation From Best Straight Line Fit) ...

Page 5

... AME, Inc. AME7106/AME7106A/AME7106R AME7107/AME7107A/AME7107R n Pin Configurations 3-1/2 Digit A/D Converter High Accuracy, Low Power 5 ...

Page 6

... F3 Hundreds-digit F-segment driver 25 E3 Hundreds-digit E-segment driver 26 AB4 Thousands-digit, B&C segments driver 27 POL Negative-polarity driver 28 BP/ LCD backplane driver (AME7106) GND Digital ground (AME7107 Hundreds-digit G-segment driver 30 A3 Hundreds-digit A-segment driver 31 C3 Hundreds-digit C-segment driver 32 G2 Tens-digit G-segment driver ...

Page 7

... AME, Inc. AME7106/AME7106A/AME7106R AME7107/AME7107A/AME7107R Pin Description (Cont.) 40-pin DIP 40-pin DIP 44-pin PQFP Pin Number (Reverse) Pin Number 33 (8) 34 (7) 35 (6) 36 (5) 37 (4) 38 (3) 39 ( Function Description Symbol 41 CREF- Reference capacitor, negative terminal 42 CREF+ Reference capacitor, positive terminal ...

Page 8

... When sup- ply voltage is greater than 7V, analog common can be used as reference source with temperature coefficient of typically 50 ppm/ C. The internal heating by the LED O display drivers of the AME7107 may degrade the sta- bility of the Analog Common. An external reference is recommended. ...

Page 9

... AME, Inc. AME7106/AME7106A/AME7106R AME7107/AME7107A/AME7107R Digital Block Diagrams 3-1/2 Digit A/D Converter High Accuracy, Low Power 9 ...

Page 10

... For example if the oscillator frequency is 48 KHz (3 conversions per second) the backplane fre- quency will be 60 Hz. The segment and backplane are at the same frequency with a nominal 5 volt amplitude. The segment is visible (ON) when the segment and the backplane are out of phase, otherwise it is invisible (OFF). The polarity segment is “ ...

Page 11

... When the TEST is pulled to V+ all segments and the minus sign will be activated. The TEST pin is tied to the internally generated digital ground through a 500 resistor in the AME7106 typically 5V lower than V+. TEST pin may be used as the negative power sup- ply for external CMOS logic at the maximum current ...

Page 12

... AME, Inc. AME7106/AME7106A/AME7106R AME7107/AME7107A/AME7107R Component Value Selection Auto-Zero Capacitor (Caz) The Caz capacitor size has some influence on system noise. A 0.47 F capacitor is recommended for 200 mV full-scale applications. A 0.047 F capacitor is recom- mended for 2.0V full-scale applications. A mylar di- electric capacitor is adequate. Reference Capacitor (Cref) A 0.1 F capacitor is acceptable when “ ...

Page 13

... BP (Back Plane) to turn on a low battery annuncia- tor for AME7106; LB pin will be low (Ground) 3-1/2 Digit A/D Converter High Accuracy, Low Power for AME7107 and is capable to sink turn on a LED indicator. AME7107 Power Dissipation Reduction The AME7107 sinks the LED display current and this generates heat in the IC package ...

Page 14

... AME7107/AME7107A/AME7107R output is at 3.2V. Maximum power dissipation segments = 622mW. However, once the AME7107 output voltage is above two volts, the LED cur- rent is essentially constant as output voltage increases. Reducing the output voltage by 0.7V, results in 7.7mA of LED current, only a 5 percent reduction. Maximum power dissipation is only 7 ...

Page 15

... AME, Inc. AME7106/AME7106A/AME7106R AME7107/AME7107A/AME7107R 3-1/2 Digit A/D Converter High Accuracy, Low Power 15 ...

Page 16

... AME, Inc. AME7106/AME7106A/AME7106R AME7107/AME7107A/AME7107R 16 3-1/2 Digit A/D Converter High Accuracy, Low Power ...

Page 17

... AME, Inc. AME7106/AME7106A/AME7106R AME7107/AME7107A/AME7107R 3-1/2 Digit A/D Converter High Accuracy, Low Power 17 ...

Page 18

... AME, Inc. AME7106/AME7106A/AME7106R AME7107/AME7107A/AME7107R 18 3-1/2 Digit A/D Converter High Accuracy, Low Power ...

Page 19

... AME, Inc. AME7106/AME7106A/AME7106R AME7107/AME7107A/AME7107R Package Dimension PDIP-40 3-1/2 Digit A/D Converter High Accuracy, Low Power MILLIMETERS SYMBOLS MIN MAX A 0.150 0.165 0.072 (TYP 0.018(TYP) B 0.050(TYP 2.049 2.074 0.540 0.555 0.600(TYP) e 0.100(TYP) E 0.600 0.700 INCHES MIN MAX ...

Page 20

... These products of AME, Inc. are not authorized for use as critical components in life-support devices or systems, without the express written approval of the president AME, Inc. reserves the right to make changes in the circuitry and specifications of its devices and advises its customers to obtain the latest version of relevant information. ...

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