LTC1605 Linear Technology, LTC1605 Datasheet
LTC1605
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LTC1605 Summary of contents
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... This easy-to-use device includes sample-and- hold, precision reference, switched capacitor successive approximation A/D and trimmed internal clock. The LTC1605’s input range is an industry standard 10V. Maximum DC specs include 2.0LSB INL and 16-bits no missing codes over temperature. An external reference can be used if greater accuracy over temperature is needed ...
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... Momentary Short to V Digital Input Voltage (Note 4) ............ V Digital Output Voltage ........ V DGND Power Dissipation.............................................. 500mW Operating Ambient Temperature Range LTC1605C................................................ LTC1605I............................................ – Storage Temperature Range ................. – 150 C Lead Temperature (Soldering, 10 sec).................. 300 C U CONVERTER CHARACTERISTICS PARAMETER CONDITIONS ...
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... LTC1605/LTC1605A MIN TYP MAX 87 – 102 – 94 – 102 – 94 275 40 Sufficient to Meet AC Specs 2 150 LTC1605/LTC1605A MIN TYP MAX 2.470 2.500 2.520 5 1 2.30 2.50 2.70 100 2.50 LTC1605/LTC1605A MIN TYP MAX 2.4 0 4.5 4.0 0.05 0.10 0.4 UNITS UNITS kHz UNITS ...
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... MIN TYP MAX 10 15 –10 10 LTC1605/LTC1605A MIN TYP MAX 100 220 200 7 LTC1605/LTC1605A MIN TYP MAX 4.75 5. 100kHz 5ns unless otherwise SAMPLE r f UNITS UNITS kHz ...
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... TEMPERATURE ( C) 1605 • TPC02 Typical DNL Curve 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 0 32768 65535 16384 49152 CODE 1605 • TPC05 LTC1605 Change in CAP Voltage vs Load Current 0.05 0.04 0.03 0.02 0.01 0 –0.01 –0.02 –0.03 –0.04 –0.05 –0.06 –0.07 –0.08 –0.09 –0.10 –80 –70 –60 –50 – ...
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... LTC1605 W U TYPICAL PERFORMANCE CHARACTERISTICS LTC1605 Nonaveraged 4096 Point FFT Plot 0 –10 f –20 –30 –40 –50 –60 –70 –80 –90 –100 –110 –120 –130 0 SINAD vs Input Frequency INPUT FREQUENCY (kHz PIN FUNCTIONS V (Pin 1): Analog Input. Connect through a 200 IN resistor to the analog input ...
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... CAPACITIVE DAC SUCCESSIVE APPROXIMATION REGISTER CONTROL LOGIC CS R/C BYTE LTC1605 Load Circuit for Output Float Delay DBN 1k 50pF HI ZEROING SWITCHES + COMP – 16 • OUTPUT LATCHES • • LTC1605 • BD BUSY 5V 1k 50pF LTC1605 • TC02 TO HI-Z V ANA V DIG D15 D0 7 ...
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... Figure 1. LTC1605 Simplified Equivalent Circuit Driving the Analog Inputs The nominal input range for the LTC1605 is 10V • V REF The input impedance is typically 20k , therefore, it should be driven with a low impedance source. Wideband noise coupling into the input can be minimized by placing a 1000pF capacitor at the input as shown in Figure 2 ...
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... F tantalum). Offset and Gain Adjustments The LTC1605 offset and full-scale errors have been trimmed at the factory with the external resistors shown in Figure 4. This allows for external adjustment of offset and full scale in applications where absolute accuracy is important. See Figure 5 for the offset and gain trim circuit ...
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... LTC1605 U U APPLICATIONS INFORMATION signal is applied to the input of the ADC and the resulting output codes are collected over a large number of conver- sions. For example in Figure 7 the distribution of output code is shown for a DC input that has been digitized 10000 times. The distribution is Gaussian and the RMS code transition is about 1LSB ...
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... CONVERT t CONV HI-Z HIGH BYTE LOW BYTE t 12 LOW BYTE HIGH BYTE =100kHz f =1kHz IN THD =–101.7dB FREQUENCY (kHz) Figure 11. LTC1605 Nonaveraged 4096 Point FFT Plot LTC1605 ACQUIRE HI-Z DATA VALID 1605 • F09 HI-Z 1605 • F03 ...
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... ADC. Pay particular attention to the design of the analog and digital ground planes. The DGND pin of the LTC1605 can be tied to the analog ground plane. Placing the bypass capacitor as close as possible to the power supply, the reference and reference buffer output is very important ...
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... U U APPLICATIONS INFORMATION Figure 12. Component Side Silkscreen for the Suggested LTC1605 Evaluation Circuit ANALOG GROUND PLANE GROUND PLANE Figure 13. Bottom Side Showing Analog Ground Plane W U DIGITAL Figure 14. Component Side Showing Separate Analog and Digital Ground Plane LTC1605 ANALOG GROUND PLANE ...
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... LTC1605 U U APPLICATIONS INFORMATION ...
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... MIN 0.125 0.005 (3.175) (0.127) MIN MIN 0.100 0.010 (2.540 0.254) LTC1605 0.301 – 0.311 (7.65 – 7.90 0.068 – 0.078 (1.73 – 1.99) 0.002 – 0.008 (0.05 – 0.21) G28 SSOP 0694 1.370* (34.789) ...
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... LTC1605 PACKAGE DESCRIPTION 0.291 – 0.299** (7.391 – 7.595) 0.010 – 0.029 45 (0.254 – 0.737) 0.009 – 0.013 NOTE 1 (0.229 – 0.330) 0.016 – 0.050 (0.406 – 1.270) NOTE: 1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS. ...