tc7109a Microchip Technology Inc., tc7109a Datasheet
tc7109a
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tc7109a Summary of contents
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... I on the digital lines. OUT © 2006 Microchip Technology Inc. General Description: The TC7109A is a 12-bit plus sign, CMOS low power Analog-to-Digital Converter (ADC). Only eight passive components and a crystal are required to form a complete dual slope integrating ADC. The improved V ...
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... OSC OUT 19 22 OSC IN HBEN 20 21 CE/LOAD MODE internal connection 44-Pin PLCC COMMON 36 INT 35 AZ TC7109ACLW 34 NC TC7109CLW 33 BUFF 32 REF OUT SEND 29 RUN/HOLD © 2006 Microchip Technology Inc. ...
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... Common AZ DE (±) INT ZI 34 Input Low 10mA – REF V- OUT © 2006 Microchip Technology Inc. TC7109A High Order Byte Inputs INT BUFF AZ INT Integrator 16 Three-State Outputs – Comparator + Comp ...
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... Connecting any digital inputs or outputs to voltages greater than V+ or less than GND may cause destructive device latch-up. Therefore recommended that inputs from sources other than the same power supply should not be applied to the TC7109A before its power supply is established. In multiple supply systems, the supply to the device should be activated first. ...
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... Connecting any digital inputs or outputs to voltages greater than V+ or less than GND may cause destructive device latch-up. Therefore recommended that inputs from sources other than the same power supply should not be applied to the TC7109A before its power supply is established. In multiple supply systems, the supply to the device should be activated first. ...
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... Reference Voltage Output – Nominally 2.8V down from V+ (Pin 40). DS21456C-page 6 Description –B . With MODE (Pin 21) HIGH, this pin serves –B , POL, OR. With MODE (Pin 21) HIGH, this 9 12 –B , POL, OR outputs are disabled. When MODE (Pin 21) is HIGH, a load 1 12 © 2006 Microchip Technology Inc. ...
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... REF CAP+ Reference Capacitor Positive. 38 REF CAP- Reference Capacitor Negative. 39 REF IN- Differential Reference Input Negative Positive Supply Voltage – Nominally +5V with respect to GND (Pin 1). Note: All Digital levels are positive true. © 2006 Microchip Technology Inc. TC7109/A Description . AZ . INT DS21456C-page 7 ...
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... Pin Designations Refer to 40-Pin DIP.) 3.1 Analog Section The Typical Application diagram on page 3 shows a block diagram of the analog section of the TC7109A. The circuit will perform conversions at a rate deter- mined by the clock frequency (8192 clock periods per cycle), when the RUN/HOLD input is left open or connected to V+ ...
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... Handshake mode at the end of every conversion cycle. With MODE = 0 (direct bus transfer), the send input should be tied to V+. (See “Handshake Mode”.) © 2006 Microchip Technology Inc. TC7109/A 3.2.3 RUN/HOLD INPUT With the RUN/HOLD input high, or open, the circuit operates normally as a dual slope ADC, as shown in Figure 3-1 ...
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... Clock Circuitry RUN/ OSC OSC OSC BUFF MODE IN OUT SEL OSC HOLD OUT ZI AZ Zero Integrator Phase forces Integrator Output LBEN 19 HBEN 20 CE/LOAD Logic 27 1 SEND GND © 2006 Microchip Technology Inc. ...
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... An alternative means of interfacing the TC7109A to digital systems is provided when the Handshake Out- t CEA put mode of the TC7109A becomes active in controlling the flow of data, instead of passively responding to chip and byte enable inputs. This mode allows a direct inter- face between the TC7109A and industry standard UARTs with no external logic required ...
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... TC7109/A The MODE input controls the Handshake mode. When the MODE input is held HIGH, the TC7109A enters the Handshake mode after new data has been stored in the output latches at the end of every conversion per- formed (see Figure 3-7 and Figure ). Entry into the Handshake mode may be triggered on demand by the MODE input ...
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... Internal Mode Send Input CE/LOAD HBEN High Byte Data LBEN Mode High Activates CE/LOAD, HBEN, LBEN Low Byte Data = Don't Care FIGURE 3-7: TC7109A Handshake with Send Input Held Positive © 2006 Microchip Technology Inc Buffered 24 OSC OUT OSC SEL GND FIGURE 3-6: The error is less than 1% from two 60Hz periods ...
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... Internal Mode Send Input (UART TBRE) CE/LOAD Output (UART TBRL) HBEN High Byte Data LBEN Low Byte Data FIGURE 3-8: TC7109A Handshake – Typical UART Interface Timing Positive Transiton causes Entry into UART Mode Internal Clock Internal Latch Status Output Mode Input UART ...
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... A ±3.5V to ±4V integrator output swing is nom- inal for the TC7109A, with ±5V supplies and analog common connected to GND. For 7-1/2 conversions per second (61.72kHz internal clock frequency), nominal ...
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... REFERENCE SOURCES A major factor in the absolute accuracy of the ADC is the stability of the reference voltage. The 12-bit resolu- tion of the TC7109A is one part in 4096, or 244 ppm. Thus, for the on-board reference temperature coeffi- cient of 70ppm/°C, a temperature difference of 3°C will introduce a one-bit absolute error. Where the ambient ...
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... Figure through Figure give practical circuits utilizing the parallel three-state output capabilities of the TC7109A. Figure shows parallel interface to the 8748/ 49 systems via an 8255 PPI, where the TC7109A data outputs are active at all times. This interface can be used in a read-after-update sequence, as shown in Figure ...
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... CE/LOAD POL, OR TC7109A Analog In RUN/HOLD +5V HBEN LBEN Byte Select Flags FIGURE 4-2: Three-Stating Several TC7109As to a Small Bus GND MODE CE/LOAD POL, OR Analog In RUN/HOLD TC7109A STATUS HBEN LBEN GND FIGURE 4-3: Full Time Parallel Interface to ...
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... Full Time Parallel Interface POL, OR Analog TC7109A CE/LOAD SEND RUN/HOLD MODE FIGURE 4-5: TC7109A Handshake Interface to © 2006 Microchip Technology Inc. Address Bus Control Bus Data Bus PA5 - PA0 PC6 μPD8255A 8 PB7 - PB0 STB A PC4 ...
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... Transmitter register, TBRE (SEND) goes HIGH again, LBEN will go HIGH, driving the UART DRR (Data Ready Reset), which will signal the end of the transfer of data from the TC7109A to the UART. An extension of the typical connection to several TC7109A’s with one UART is shown in Figure 4-7. In ...
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... POL 12-19 9- CE/LOAD TC7109/A MODE CE/ SEND LOAD POL, OR Analog TC7109A RUN/HOLD +5V HBEN LBEN 39 – REF IN- 38 REF CAP- External 1μF 37 Reference REF CAP REF IN+ 1MΩ Input 0.01μF 34 – Analog ...
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... This feature can be used to advantage in reducing line frequency noise (Figure ). DS21456C-page Measurement Period 0.1/t 1/t Input Frequency FIGURE 5-1: Normal Mode Rejection of Dual Slope Converter as a Function of Frequency © 2006 Microchip Technology Inc. 10/t ...
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... Component Taping Orientation for 44-Pin PLCC Devices Pin 1 Carrier Tape, Number of Components Per Reel and Reel Size Package 44-Pin PLCC Note: Drawing does not represent total number of pins. © 2006 Microchip Technology Inc. User Direction of Feed Pin 1 P Standard Reel Component Orientation for 713 Suffix Device ...
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... Pin 1 .540 (13.72) .510 (12.95) .030 (0.76) Min. .060 (1.52) .020 (0.51) .015 (0.38) .008 (0.20) .150 (3.81) MIN. .020 (0.51) .016 (0.41) .610 (15.49) .590 (14.99) 3° Min. .700 (17.78) .610 (15.50) Dimensions: inches (mm) .620 (15.75) .590 (15.00) 3° Min. .700 (17.78) .620 (15.75) Dimensions: inches (mm) © 2006 Microchip Technology Inc. ...
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... Standard Reel Component Orientation for 713 Suffix Device Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) 44-Pin PLCC 32 mm Note: Drawing does not represent total number of pins. © 2006 Microchip Technology Inc. 7° Max. .009 (0.23) .005 (0.13) .398 (10.10) .390 (9.90) .557 (14.15) .537 (13.65) ...
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... TC7109/A NOTES: DS21456C-page 26 © 2006 Microchip Technology Inc. ...
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... To register, access the Microchip web site at www.microchip.com, click on Customer Change Notification and follow the registration instructions. © 2006 Microchip Technology Inc. CUSTOMER SUPPORT Users of Microchip products can receive assistance through several channels: • Distributor or Representative • ...
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... What deletions from the document could be made without affecting the overall usefulness there any incorrect or misleading information (what and where)? 7. How would you improve this document? DS21456C-page 28 Total Pages Sent ________ FAX: (______) _________ - _________ N Literature Number: DS21456C © 2006 Microchip Technology Inc. ...
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... Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights. © 2006 Microchip Technology Inc. Trademarks The Microchip name and logo, the Microchip logo, Accuron, dsPIC, K ...
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