Datasheet LTC1290 (Analog Devices) - 7
| Fabricante | Analog Devices |
| Descripción | Single Chip 12-Bit Data Acquisition System |
| Páginas / Página | 32 / 7 — TYPICAL PERFOR A CE CHARACTERISTICS. Maximum Filter Resistor vs. … |
| Formato / tamaño de archivo | PDF / 633 Kb |
| Idioma del documento | Inglés |
TYPICAL PERFOR A CE CHARACTERISTICS. Maximum Filter Resistor vs. Sample-and-Hold Acquisition. Supply Current (Power Shutdown)
Línea de modelo para esta hoja de datos
- LTC1290BCN#PBF LTC1290BCN#PBF LTC1290BCSW#PBF LTC1290BCSW#PBF LTC1290BCSW#TRPBF LTC1290BCSW#TRPBF LTC1290BIN#PBF LTC1290BIN#PBF LTC1290BISW#PBF LTC1290BISW#PBF LTC1290BISW#TRPBF LTC1290BISW#TRPBF LTC1290CCN#PBF LTC1290CCN#PBF LTC1290CCSW#PBF LTC1290CCSW#PBF LTC1290CCSW#TRPBF LTC1290CCSW#TRPBF LTC1290CIN#PBF LTC1290CIN#PBF LTC1290CISW#PBF LTC1290CISW#PBF LTC1290CISW#TRPBF LTC1290CISW#TRPBF LTC1290DCN#PBF LTC1290DCN#PBF LTC1290DCSW#PBF LTC1290DCSW#PBF LTC1290DCSW#TRPBF LTC1290DCSW#TRPBF LTC1290DIN#PBF LTC1290DIN#PBF LTC1290DISW#PBF LTC1290DISW#PBF LTC1290DISW#TRPBF LTC1290DISW#TRPBF
Versión de texto del documento
LTC1290
W U TYPICAL PERFOR A CE CHARACTERISTICS Maximum Filter Resistor vs Sample-and-Hold Acquisition Supply Current (Power Shutdown) Cycle Time Time vs Source Resistance vs Temperature
10k 100 10 VREF = 5V ACLK OFF DURING µs) 9 VCC = 5V POWER SHUTDOWN TA = 25°C 8 ) 1k 0V TO 5V INPUT STEP Ω µA) ( 7 ** ( CC RSOURCE+ 6 VIN + FILTER 100 10 5 R – FILTER 4 VIN + 3 C MAXIMUM R 10 FILTER ≥ 1µF SUPPLY CURRENT, I 2 – S & H AQUISITION TIME TO 0.02% ( 1 1.0 1 0 10 100 1000 10000 100 1k 10k –50 –30 –10 10 30 50 70 90 110 130 CYCLE TIME, t 1290 • TPC10 R CYC (µs) SOURCE+ (Ω) AMBIENT TEMPERATURE, TA (°C) ** MAXIMUM RFILTER REPRESENTS THE FILTER RESISTOR LTC1290 • TPC11 1290 • TPC12 VALUE AT WHICH A 0.1LSB CHANGE IN FULL-SCALE ERROR FROM ITS VALUE AT RFILTER = 0 IS FIRST DETECTED.
Supply Current (Power Shutdown) Input Channel Leakage Current vs ACLK vs Temperature Noise Error vs Reference Voltage
200 1000 2.25 VCC = 5V LTC1290 NOISE 200µVP-P 180 CMOS LEVELS 900 GUARANTEED 2.00 160 800 µA) 1.75 ( 700 CC 140 1.50 120 600 1.25 500 100 1.00 400 80 0.75 300 60 SUPPLY CURRENT, I 0.50 200 40 ON CHANNEL 100 PEAK-TO-PEAK NOISE ERROR (LSBs) 0.25 OFF CHANNEL 20 INPUT CHANNEL LEAKAGE CURRENT (nA) 0 0 0 1.00 2.00 3.00 4.00 –50 –30 –10 10 30 50 70 90 110 130 0 1 2 3 4 5 ACLK FREQUENCY (MHz) AMBIENT TEMPERATURE, TA (°C) REFERENCE VOLTAGE, VREF (V) 1290 • TPC13 1290 • TPC14 1290 • TPC15
U U U PI FU CTIO S CH0 to CH7 (Pin 1 to Pin 8):
Analog Inputs. The analog
V – (Pin 12):
Negative Supply. Tie V – to most negative inputs must be free of noise with respect to AGND. potential in the circuit. (Ground in single supply applica- tions.)
COM (Pin 9):
Common. The common pin defines the zero reference point for all single-ended inputs. It must be free
REF –, REF + (Pins 13, 14):
Reference Inputs. The refer- of noise and is usually tied to the analog ground plane. ence inputs must be kept free of noise with respect to AGND.
DGND (Pin 10):
Digital Ground. This is the ground for the internal logic. Tie to the ground plane.
CS (Pin 15):
Chip Select Input. A logic low on this input enables data transfer.
AGND (Pin 11):
Analog Ground. AGND should be tied directly to the analog ground plane.
DOUT (Pin 16):
Digital Data Output. The A/D conversion result is shifted out of this output. 1290fe 7
W U TYPICAL PERFOR A CE CHARACTERISTICS Maximum Filter Resistor vs Sample-and-Hold Acquisition Supply Current (Power Shutdown) Cycle Time Time vs Source Resistance vs Temperature
10k 100 10 VREF = 5V ACLK OFF DURING µs) 9 VCC = 5V POWER SHUTDOWN TA = 25°C 8 ) 1k 0V TO 5V INPUT STEP Ω µA) ( 7 ** ( CC RSOURCE+ 6 VIN + FILTER 100 10 5 R – FILTER 4 VIN + 3 C MAXIMUM R 10 FILTER ≥ 1µF SUPPLY CURRENT, I 2 – S & H AQUISITION TIME TO 0.02% ( 1 1.0 1 0 10 100 1000 10000 100 1k 10k –50 –30 –10 10 30 50 70 90 110 130 CYCLE TIME, t 1290 • TPC10 R CYC (µs) SOURCE+ (Ω) AMBIENT TEMPERATURE, TA (°C) ** MAXIMUM RFILTER REPRESENTS THE FILTER RESISTOR LTC1290 • TPC11 1290 • TPC12 VALUE AT WHICH A 0.1LSB CHANGE IN FULL-SCALE ERROR FROM ITS VALUE AT RFILTER = 0 IS FIRST DETECTED.
Supply Current (Power Shutdown) Input Channel Leakage Current vs ACLK vs Temperature Noise Error vs Reference Voltage
200 1000 2.25 VCC = 5V LTC1290 NOISE 200µVP-P 180 CMOS LEVELS 900 GUARANTEED 2.00 160 800 µA) 1.75 ( 700 CC 140 1.50 120 600 1.25 500 100 1.00 400 80 0.75 300 60 SUPPLY CURRENT, I 0.50 200 40 ON CHANNEL 100 PEAK-TO-PEAK NOISE ERROR (LSBs) 0.25 OFF CHANNEL 20 INPUT CHANNEL LEAKAGE CURRENT (nA) 0 0 0 1.00 2.00 3.00 4.00 –50 –30 –10 10 30 50 70 90 110 130 0 1 2 3 4 5 ACLK FREQUENCY (MHz) AMBIENT TEMPERATURE, TA (°C) REFERENCE VOLTAGE, VREF (V) 1290 • TPC13 1290 • TPC14 1290 • TPC15
U U U PI FU CTIO S CH0 to CH7 (Pin 1 to Pin 8):
Analog Inputs. The analog
V – (Pin 12):
Negative Supply. Tie V – to most negative inputs must be free of noise with respect to AGND. potential in the circuit. (Ground in single supply applica- tions.)
COM (Pin 9):
Common. The common pin defines the zero reference point for all single-ended inputs. It must be free
REF –, REF + (Pins 13, 14):
Reference Inputs. The refer- of noise and is usually tied to the analog ground plane. ence inputs must be kept free of noise with respect to AGND.
DGND (Pin 10):
Digital Ground. This is the ground for the internal logic. Tie to the ground plane.
CS (Pin 15):
Chip Select Input. A logic low on this input enables data transfer.
AGND (Pin 11):
Analog Ground. AGND should be tied directly to the analog ground plane.
DOUT (Pin 16):
Digital Data Output. The A/D conversion result is shifted out of this output. 1290fe 7