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LTC1297DCJ8 Datasheet(PDF) 6 Page - Linear Technology |
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LTC1297DCJ8 Datasheet(HTML) 6 Page - Linear Technology |
6 / 24 page 6 LTC1292/LTC1297 CC HARA TERISTICS A TYPICALPERFOR CE 100 0.2 0.4 0.6 0.8 1.0 1k 10k 100k LTC1292/7G13 0 VCC = 5V VREF = 5V CLK = 1MHz RSOURCE– (Ω) + – +IN –IN +VIN RSOURCE Maximum Filter Resistor vs Cycle Time PI FU CTIO S # PIN FUNCTION DESCRIPTION 1 CS Chip Select Input A logic low on this input enables the LTC1292/LTC1297. Power shutdown is activated on the LTC1297 when CS is brought high. 2, 3 +IN, –IN Analog Inputs These inputs must be free of noise with respect to GND. 4 GND Analog Ground GND should be tied directly to an analog ground plane. 5VREF Reference Input The reference input defines the span of the A/D converter and must be kept free of noise with respect to GND. 6DOUT Digital Data Output The A/D conversion result is shifted out of this output. 7 CLK Shift Clock This clock synchronizes the serial data transfer. 8VCC Positive Supply This supply must be kept free of noise and ripple by bypassing directly to the analog ground plane. * MAXIMUM CLK FREQUENCY REPRESENTS THE CLK FREQUENCY AT WHICH A 0.1LSB SHIFT IN THE ERROR AT ANY CODE TRANSITION FROM ITS 1MHz VALUE IS FIRST DETECTED. ** MAXIMUM RFILTER REPRESENTS THE FILTER RESISTOR VALUE AT WHICH A 0.1LSB CHANGE IN FULL SCALE ERROR FROM ITS VALUE AT RFILTER = 0Ω IS FIRST DETECTED. CYCLE TIME (µs) 10 100 1k 10k 10 1k 10k LTC1292/7 G14 1 100 + – +VIN CFILTER ≥1µF RFILTER Maximum Clock Rate vs Source Resistance RSOURCE+ (Ω) 100 1 10 100 1000 10000 LTC1292/7 G15 + – +VIN RSOURCE VREF = 5V VCC = 5V TA = 25°C 0V TO 5V INPUT STEP Sample-and-Hold Acquisition Time vs Source Resistance Input Channel Leakage Current vs Temperature AMBIENT TEMPERATURE (°C) –50 0 100 300 400 500 1000 700 –10 30 50 130 LTC1292/7 G16 200 800 900 600 –30 10 70 90 110 ON CHANNEL OFF CHANNEL GUARANTEED Noise Error vs Reference Voltage REFERENCE VOLTAGE (V) 0 0 0.25 0.75 1.00 1.25 2 4 5 2.25 0.50 13 1.50 1.75 2.00 LTC1292/7 G17 LTC1292/LTC1297 NOISE = 200µVP-P |
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