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LTC1292CCN8 Datasheet(PDF) 6 Page - Linear Technology |
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LTC1292CCN8 Datasheet(HTML) 6 Page - Linear Technology |
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6 / 24 page  6 LTC1292/LTC1297 12927fb 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 * 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 = 200 µVP-P CS (Pin 1): Chip Select Input. A logic low on this input enables the LTC1292/LTC1297. Power shutdown is acti- vated on the LTC1297 when CS is brought high. +IN, –IN (Pin 2, 3): Analog Inputs. These inputs must be free of noise with respect to GND. GND (Pin 4): Analog Ground. GND should be tied directly to an analog ground plane. VREF (Pin 5): Reference Input. The reference input defines the span of the A/D converter and must be kept free of noise with respect to GND. DOUT (Pin 6): Digital Data Output. The A/D conversion result is shifted out of this output. CLK (Pin 7): Shift Clock. This clock synchronizes the serial data transfer. VCC (Pin 8):Positive Supply. This supply must be kept free of noise and ripple by bypassing directly to the analog ground plane. |
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