TC7106 Microchip, TC7106 Datasheet
TC7106
Available stocks
Related parts for TC7106
TC7106 Summary of contents
Page 1
... Microchip Technology Inc. © TC7106/A/TC7107/A General Description The TC7106A and TC7107A 3-1/2 digit direct display drive analog-to-digital converters allow existing 7106/ 7107 based systems to be upgraded. Each device has a precision reference with a 20ppm/°C max tempera- ture coefficient. This represents times improve- ment over similar 3-1/2 digit converters ...
Page 2
... 1000 POL (Minus Sign) 44-Pin PQFP TC7106ACKW 28 BP/GND TC7107ACKW 27 POL 2002 Microchip Technology Inc. © ...
Page 3
... Typical Application 1MΩ + Analog 0.01µF Input – 47kΩ 0.22µF 2002 Microchip Technology Inc. © TC7106/A/TC7107/A 0.1µF LCD Display (TC7106/A) or Common Node w/ LED REF REF 31 Segment Drive POL Minus Sign 21 BP ANALOG 32 1 COMMON ...
Page 4
... C (Commercial) Devices .............. 0°C to +70°C I (Industrial) Devices ................ -25°C to +85°C Storage Temperature Range .............. -65°C to +150°C TC7106/A AND TC7107/A ELECTRICAL SPECIFICATIONS Electrical Characteristics: Unless otherwise noted, specifications apply to both the TC7106/A and TC7107 48kHz. Parts are tested in the circuit of the Typical Operating Circuit. CLOCK ...
Page 5
... TC7106/A AND TC7107/A ELECTRICAL SPECIFICATIONS (CONTINUED) Electrical Characteristics: Unless otherwise noted, specifications apply to both the TC7106/A and TC7107 48kHz. Parts are tested in the circuit of the Typical Operating Circuit. CLOCK Symbol Parameter CMRR Common Mode Rejection Ratio (Note 3) e Noise (Peak to Peak Value not Exceeded ...
Page 6
... E Activates the E section of the hundreds display. 3 Activates both halves of the 1 in the thousands display. 4 Activates the negative polarity display. LCD Backplane drive output (TC7106A). Digital Ground (TC7107A). G Activates the G section of the hundreds display Activates the A section of the hundreds display Activates the C section of the hundreds display ...
Page 7
... OSC1 2002 Microchip Technology Inc. © TC7106/A/TC7107/A Description The analog input required to generate a full scale output (1999 counts). Place 100mV between Pins 35 and 36 for 199.9mV full scale. Place 1V between Pins 35 and 36 for 2V full scale. See paragraph on Reference Voltage. Lamp test. When pulled HIGH (to V+) all segments will be turned on and the display should read -1888 ...
Page 8
... DETAILED DESCRIPTION (All Pin designations refer to 40-Pin PDIP.) 3.1 Dual Slope Conversion Principles The TC7106A and TC7107A are dual slope, integrating analog-to-digital converters. An understanding of the dual slope conversion technique will aid in following the detailed operation theory. The conventional dual slope converter measurement cycle has two distinct phases: • ...
Page 9
... V - are reversed, this indicator will reverse When the TEST pin on the TC7106A is pulled to V+, all segments are turned “ON.” The display reads -1888. During this mode, the LCD segments have a constant DC voltage impressed. DO NOT LEAVE THE DIS- PLAY IN THIS MODE FOR MORE THAN SEVERAL MINUTES! LCD displays may be destroyed if operated with DC levels for extended periods ...
Page 10
... TC7106/A/TC7107/A FIGURE 5-2: TC7106A BLOCK DIAGRAM DS21455B-page 10 2002 Microchip Technology Inc. © ...
Page 11
... and V + are reversed, this IN IN indication can be reversed also, if desired. The display font is the same as the TC7106A. 6.1 System Timing The oscillator frequency is divided by 4 prior to clocking the internal decade counters. The four-phase mea- surement cycle takes a total of 4000 counts, or 16,000 clock pulses ...
Page 12
... TC7106/A/TC7107/A FIGURE 6-2: TC7107A BLOCK DIAGRAM DS21455B-page 12 2002 Microchip Technology Inc. © ...
Page 13
... INT put voltage swing without causing output saturation. Due to the TC7106A/7107A superior temperature coef- ficient specification, analog common will normally sup- ply the differential voltage reference. For this case, a ±2V full scale integrator output swing is satisfactory. ...
Page 14
... The typical range – 1 1V. Common mode voltages are removed from the system when the TC7106A/ TC7107A operates from a battery or floating power source (isolated from measured system) and V connected to analog common (V ) (see Figure 8-2). ...
Page 15
... CMOS logic. The TEST pin is tied to the inter- nally generated negative logic supply (Internal Logic Ground) through a 500Ω resistor in the TC7106A. The TEST pin load should be no more than 1mA. If TEST is pulled to V+ all segments plus the minus sign will be activated ...
Page 16
... TC7106/A/TC7107/A 9.0 POWER SUPPLIES The TC7107A is designed to work from ±5V supplies. However negative supply is not available, it can be generated from the clock output with two diodes, two capacitors, and an inexpensive IC (Figure 9-1). FIGURE 9-1: GENERATING NEGATIVE SUPPLY FROM +5V V+ CD4009 V+ OSC1 OSC2 OSC3 ...
Page 17
... TP 4 TC7107A 1 10 Display 5.1Ω 1/4W 1N4001 10.0 TYPICAL APPLICATIONS 10.1 Liquid Crystal Display Sources Several manufacturers supply standard LCDs to inter- face with the TC7106A 3-1/2 digit analog-to-digital converter. Manufacturer Address/Phone Crystaloid 5282 Hudson Dr. C5335, H5535, Electronics Hudson, OH 44236 T5135, SX440 216-655-2429 AND 720 Palomar Ave. ...
Page 18
... 20kΩ TC7106A REF 20kΩ REF Common TC7106A, USING THE INTERNAL REFERENCE: 200mV FULL SCALE, 3 READINGS-PER-SECOND (RPS) Set V = 100mV REF 40 100kΩ 100pF 36 35 1kΩ 22kΩ 34 0.1µF 33 1MΩ 0.01µ ...
Page 19
... To Display FIGURE 10-7: CIRCUIT FOR DEVELOPING UNDER RANGE AND OVER RANGE SIGNALS FROM TC7106A OUTPUTS Logic V CC TC7106A O/R U/R 20 CD4023 OR 74C10 CD4077 O/R = Over Range U/R = Under Range 2002 Microchip Technology Inc. © TC7106/A/TC7107/A FIGURE 10-8: ...
Page 20
... OUT 1.86V @ 25°C 50kΩ 1. TC7106A REF REF 32 Analog Common 0.01 µ SEG DRIVE LCD Display REF TC7106A V - REF V = 2.00V Common V- 26 2002 Microchip Technology Inc. © ...
Page 21
... Carrier Tape, Number of Components Per Reel and Reel Size Package 44-Pin PQFP Note: Drawing does not represent total number of pins. 2002 Microchip Technology Inc. © TC7106/A/TC7107/A User Direction of Feed P Standard Reel Component Orientation for TR Suffix Device Pitch (P) Part Per Full Reel ...
Page 22
... TC7106/A/TC7107/A 11.3 Package Dimensions 40-Pin PDIP (Wide) 2.065 (52.45) 2.027 (51.49) .200 (5.08) .140 (3.56) .150 (3.81) .115 (2.92) .110 (2.79) .070 (1.78) .090 (2.29) .045 (1.14) 40-Pin CERDIP (Wide) .098 (2.49) MAX. 2.070 (52.58) 2.030 (51.56) .210 (5.33) .170 (4.32) .200 (5.08) .125 (3.18) .110 (2.79) .065 (1.65) .090 (2.29) .045 (1.14) DS21455B-page 22 PIN 1 .555 (14.10) .530 (13.46) .040 (1.02) .020 (0.51) .015 (0.38) .008 (0.20) .022 (0.56) ...
Page 23
... PQFP PIN 1 .018 (0.45) .012 (0.30) .031 (0.80) TYP. .398 (10.10) .390 (9.90) .557 (14.15) .537 (13.65) 2002 Microchip Technology Inc. © TC7106/A/TC7107/A PIN 1 .050 (1.27) TYP. .180 (4.57) .165 (4.19) 7° MAX. .009 (0.23) .005 (0.13) .398 (10.10) .390 (9.90) .557 (14.15) .537 (13.65) .096 (2.45) MAX. Dimensions: inches (mm) .021 (0.53) .013 (0.33) ...
Page 24
... TC7106/A/TC7107/A PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office. PART CODE 6 = LCD } 7 = LED A or blank* R (reversed pins) or blank (CPL pkg only) * "A" parts have an improved reference TC Package Code (see below): SALES AND SUPPORT ...
Page 25
... Microchip. No licenses are con- veyed, implicitly or otherwise, under any intellectual property rights. 2002 Microchip Technology Inc. © TC7106/A/TC7107/A Trademarks The Microchip name and logo, the Microchip logo, FilterLab microID, MPLAB, PIC, PICmicro, PICMASTER, ...
Page 26
... Tel: 81-45-471- 6166 Fax: 81-45-471-6122 Korea Microchip Technology Korea 168-1, Youngbo Bldg. 3 Floor Samsung-Dong, Kangnam-Ku Seoul, Korea 135-882 Tel: 82-2-554-7200 Fax: 82-2-558-5934 Singapore Microchip Technology Singapore Pte Ltd. 200 Middle Road #07-02 Prime Centre Singapore, 188980 Tel: 65-6334-8870 Fax: 65-6334-8850 Taiwan Microchip Technology Taiwan 11F-3, No. 207 ...