ltc1605-2 Linear Technology Corporation, ltc1605-2 Datasheet
ltc1605-2
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ltc1605-2 Summary of contents
Page 1
... A/D and trimmed internal clock. The LTC1605-1’s input range while the LTC1605-2’s input range is 4V. An external reference can be used if greater accuracy over temperature is needed. The ADC has a microprocessor compatible, 16-bit or two byte parallel output port ...
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... Digital Input Voltage (Note 4) ........ V Digital Output Voltage ........ V DGND Power Dissipation .............................................. 500mW Operating Ambient Temperature Range LTC1605-1C/LTC1605-2C ....................... LTC1605-1I/LTC1605-2I .................... – Storage Temperature Range ................. – 150 C Lead Temperature (Soldering, 10 sec).................. 300 VERTER CHARACTERISTICS temperature range, otherwise specifications are at T ...
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... 1.6mA High OUT DD CS High (Note OUT OUT DD LTC1605-1/LTC1605-2 MIN TYP MAX – 101 – 92 – 101 – 92 275 40 Sufficient to Meet AC Specs 2 150 denotes the specifications which apply over the MIN TYP MAX 2 ...
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... Note 8: Zero error for the LTC1605-1 is the voltage measured from 0.5LSB when the output code flickers between 0000 0000 0000 0000 and 0000 0000 0000 0001. Zero error for the LTC1605-2 is the voltage measured from – 0.5LSB when the output code flickers between 0000 0000 0000 0000 and 1111 1111 1111 1111 ...
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... G03 Power Supply Feedthrough vs Ripple Frequency –20 –30 –40 LTC1605-2 –50 –60 LTC1605-1 –70 –80 100 1k 10k 100k RIPPLE FREQUENCY (Hz) LTXXXX GXX Total Harmonic Distortion vs Input Frequency (LTC1605-2) –70 –80 –90 –100 –110 1 10 INPUT FREQUENCY (kHz) 1605-1/2 G09 10 1M 100 5 ...
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... V (Pin 1): Analog Input. Connect through a 200 IN resistor to the analog input. Full-scale input range for the LTC1605-1 and 4V for the LTC1605-2. AGND1 (Pin 2): Analog Ground. Tie to analog ground plane. REF (Pin 3): 2.5V Reference Output. Bypass with 2.2 F tantalum capacitor. Can be driven with an external refer- ence ...
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... V 16-bit output latches. Driving the Analog Inputs The nominal input range for the LTC1605 (1.6V ) and for the LTC1605-2 the input range is 4V REF or ( 1.6V 25V. The input impedance is typically 10k ; therefore, it should be driven by a low impedance source. Wideband ...
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... V output code is changing between 1111 1111 1111 1110 and 1111 1111 1111 1111. Figure 6a shows the unipolar transfer characteristic of the LTC1605-1. For the LTC1605-2, first adjust the offset to zero adjusting resistor R3. Apply an input voltage of – (– 0.5LSB) and adjust R3 so the code is changing be- CAP tween 1111 1111 1111 1111 and 0000 0000 0000 0000 ...
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... GAIN 5V 1% TRIM 576k R4 50k + R3 2.2 F 50k OFFSET TRIM Figure Input for the LTC1605-1 and 4V for the LTC1605-2 with Offset and Gain Trim W U BANDGAP REFERENCE V ANA INTERNAL CAPACITOR DAC 1605-1/2 F03 Figure 6a. LTC1605-1 Unipolar Transfer Characteristics V IN AGND1 ...
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... The format of the output data is straight binary for the LTC1605-1 and two’s complement for the LTC1605-2. The digital input pin BYTE is used to control the two byte read. With the BYTE pin low, the first eight MSBs are output on the D15 to D8 pins and the eight LSBs are output on the pins ...
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... Figure 10. Using CS and BYTE to Control Data Bus Read Timing CONVERT t CONV HI-Z HIGH BYTE LOW BYTE t 12 LOW BYTE HIGH BYTE LTC1605-1/LTC1605 ACQUIRE HI-Z DATA VALID 1605-1/2 F09 HI-Z 1605-1/2 F10 ...
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... FFT algorithm, the ADC’s spectral content can be examined for frequencies outside the fundamental. Figure 11 shows a typical LTC1605-2 FFT plot which yields a SINAD of 87dB and THD of –101.1dB. Signal-to-Noise Ratio The Signal-to-Noise and Distortion Ratio (SINAD) is the ...
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... U U APPLICATIONS INFORMATION Figure 12. Component Side Silkscreen for the Suggested LTC1605-1/LTC1605-2 Evaluation Circuit ANALOG DIGITAL GROUND PLANE GROUND PLANE Figure 13. Bottom Side Showing Analog Ground Plane W U Figure 14. Component Side Showing Separate Analog and Digital Ground Plane LTC1605-1/LTC1605-2 ANALOG ...
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... LTC1605-1/LTC1605 APPLICATIONS INFORMATION ...
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... PORTC. The low byte is read through PORTC when the processor changes the BYTE signal to a logic high. The timing relationship of the control signals and data are shown in Figure 17 SS* ,CSK ;MOSI,MISO,TxD ,RxD “ ,MODF “ LTC1605-1/LTC1605 ...
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... LTC1605-1/LTC1605-2 U TYPICAL APPLICATIO S ***************************************** * Start GETDATA Routine ***************************************** * ORG $C000 Program start location INIT1 LDAA #$03 0,0,0,0,0,0,1,1 * “STAF=0,STAI=0,CWOM=0,HNDS=0, OIN=0, PLS=0, EGA=1,INVB=1” STAA PIOC Ensures that the PIOC register’s status is the same * as after a reset, necessary of simple Port D manipulation LDAA ...
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... Bit0 = Lo; the LTC1605’s conversion is not * complete * Bit0 = Hi; the LTC1605’s conversion is complete BEQ CONVEND Branch to the loop’s beginning while Bit7 * remains low * * * This forces a logic low on PORTD’s SS*, latching the MUXes data * Initiate a conversion This sets the LTC1605’s R/ logic high * * * * LTC1605-1/LTC1605-2 17 ...
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... – 0 OUT DLK USE FOR LTC1605 DGND S7 M0S1 SS CLK Figure 16. 8-Channel, 16-Bit Data Acquisition System with Interface to the 68HC11 0 200 + 1/2 LT1630 5V 2 – 33. 2.2 F –5V SUPPLY FOR ...
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... MIN 0.125 0.005 0.100 (3.175) (2.54) MIN (0.127) BSC MIN LTC1605-1/LTC1605 7.65 – 7.90 (0.301 – 0.311 1.73 – 1.99 (0.068 – 0.078) 0.05 – 0.21 (0.002 – 0.008) G28 SSOP 1098 1.370* (34.789) MAX ...
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... LTC1605-1/LTC1605-2 U TYPICAL APPLICATIO MUX CS MUX CH0 DATA R/C BUSY BYTE ADC HI BYTE DATA Figure 17. This Is the Timing Relationship Between the Selected MUX Channel, Its Conversion Data and the ADC and MUX Control Signals When Using the Sample Program In Listing 1. The Conversion ...