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ADS7845E Datasheet(PDF) 2 Page - Texas Instruments |
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ADS7845E Datasheet(HTML) 2 Page - Texas Instruments |
2 / 16 page ® 2 ADS7845 PARAMETER CONDITIONS MIN TYP MAX UNITS RESOLUTION 12 Bits ANALOG INPUT Full-Scale Input Span Positive Input - Negative Input 0 VREF V Absolute Input Range Positive Input –0.2 +VCC +0.2 V Negative Input –0.2 +0.2 V Capacitance 25 pF Leakage Current 0.1 µA SYSTEM PERFORMANCE No Missing Codes 11 Bits Integral Linearity Error ±2 LSB(1) Offset Error ±6 LSB Gain Error ±4 LSB Noise 30 µVrms Power Supply Rejection Ratio 70 dB SAMPLING DYNAMICS Conversion Time 12 Clk Cycles Acquisition Time 3 Clk Cycles Throughput Rate 125 kHz Multiplexer Settling Time 500 ns Aperture Delay 30 ns Aperture Jitter 100 ps Channel-to-Channel Isolation VIN = 2.5Vp-p at 50kHz 100 dB SWITCH DRIVERS On-Resistance UL, UR 7 Ω LL, LR 7 Ω REFERENCE INPUT Range 1.0 +VCC V Resistance CS = GND or +VCC 5G Ω Input Current 13 40 µA fSAMPLE = 12.5kHz 2.5 µA CS = +VCC 0.001 3 µA DIGITAL INPUT/OUTPUT Logic Family CMOS Logic Levels, Except PENIRQ VIH | IIH | ≤ +5µA+VCC • 0.7 +VCC +0.3 VIL | IIL | ≤ +5µA –0.3 +0.8 V VOH IOH = –250µA+VCC • 0.8 V VOL IOL = 250µA 0.4 V PENIRQ VOL TA = 0°C to +85°C, 100kΩ Pull-Up 0.8 V Data Format Straight Binary POWER SUPPLY REQUIREMENTS +VCC Specified Performance(2) 2.7 5.5 V Quiescent Current 280 650 µA fSAMPLE = 12.5kHz 220 µA Shutdown Mode with 3 µA DCLK = DIN = +VCC Power Dissipation +VCC = +2.7V 1.8 mW TEMPERATURE RANGE Specified Performance –40 +85 °C SPECIFICATIONS At TA = –40°C to +85°C, +VCC = +2.7V, VREF = +2.5V, fSAMPLE = 125kHz, fCLK = 16 • fSAMPLE = 2MHz, 12-bit mode, and digital inputs = GND or +VCC, unless otherwise noted. The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant any BURR-BROWN product for use in life support devices and/or systems. ADS7845E NOTE: (1) LSB means Least Significant Bit. With VREF equal to +2.5V, one LSB is 610µV. (2) ADS7845 will operate down to 2.0V. |
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