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LTC1392 Datasheet(PDF) 6 Page - Linear Technology |
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LTC1392 Datasheet(HTML) 6 Page - Linear Technology |
6 / 12 page 6 LTC1392 TEST CIRCUITS Voltage Waveforms for tdis DOUT WAVEFORM 1 (SEE NOTE 1) 2.0V tdis 90% 10% DOUT WAVEFORM 2 (SEE NOTE 2) CS NOTE 1: WAVEFORM 1 IS FOR AN OUTPUT WITH INTERNAL CONDITIONS SUCH THAT THE OUTPUT IS HIGH UNTIL DISABLED BY THE OUTPUT CONTROL. NOTE 2: WAVEFORM 2 IS FOR AN OUTPUT WITH INTERNAL CONDITIONS SUCH THAT THE OUTPUT IS LOW UNTIL DISABLED BY THE OUTPUT CONTROL. LTC1392 • TC06 APPLICATIONS INFORMATION DIGITAL CONSIDERATIONS Serial Interface The LTC1392 communicates with microprocessors and other external circuitry via a synchronous, half-duplex, 3-wire serial interface (see Figure 1). The clock (CLK) synchronizes the data transfer with each bit being trans- mitted on the falling CLK edge and captured on the rising CLK edge in both transmitting and receiving systems. The input data is first received and then the A/D conversion result is transmitted (half-duplex). Half-duplex operation allows DIN and DOUT to be tied together allowing transmis- sion over three wires: CS, CLK and DATA (DIN/DOUT). Data transfer is initiated by a falling chip select (CS) signal. After the falling CS is recognized, an 80 µs delay is needed for The LTC1392 is a micropower data acquisition system designed to measure temperature, an on-chip power supply voltage and a differential input voltage. The LTC1392 contains the following functional blocks: 1. On-chip temperature sensor 2. 10-bit successive approximation capacitive ADC 3. Bandgap reference 4. Analog multiplexer (MUX) 5. Sample-and-hold (S/H) 6. Synchronous, half-duplex serial interface 7. Control and timing logic Load Circuit for tdDO, tr and tf DOUT 1.4V 3k 100pF TEST POINT LTC1392 • TC02 Voltage Waveforms for DOUT Delay Time, tdDO CLK DOUT VIL tdDO VOL VOH LTC1392 • TC03 Load Circuit for tdis and ten DOUT 3k 100pF TEST POINT 5V tdis WAVEFORM 2, ten tdis WAVEFORM 1 LTC1392 • TC05 Voltage Waveforms for DOUT Rise and Fall Times, tr and tf DOUT VOL VOH tr tf 1392 TC04 |
Similar Part No. - LTC1392_15 |
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Similar Description - LTC1392_15 |
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