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ADS7846IGQCR Datasheet(PDF) 3 Page - Texas Instruments |
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ADS7846IGQCR Datasheet(HTML) 3 Page - Texas Instruments |
3 / 30 page ADS7846 3 SBAS125H www.ti.com 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 Resolution 12 Bits No Missing Codes 11 Bits Integral Linearity Error ±2 LSB(1) Offset Error ±6LSB Gain Error External VREF ±4LSB Noise Including Internal VREF 70 µVrms Power-Supply Rejection 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 Y+, X+ 5 Ω Y–, X– 6 Ω Drive Current(2) Duration 100ms 50 mA REFERENCE OUTPUT Internal Reference Voltage 2.45 2.50 2.55 V Internal Reference Drift 15 ppm/ °C Quiescent Current 500 µA REFERENCE INPUT Range 1.0 +VCC V Input Impedance SER/DFR = 0, PD1 = 0, 1 G Ω Internal Reference Off Internal Reference On 250 Ω BATTERY MONITOR Input Voltage Range 0.5 6.0 V Input Impedance Sampling Battery 10 k Ω Battery Monitor Off 1G Ω Accuracy External VREF = 2.5V –2+2 % Internal Reference –3+3 % TEMPERATURE MEASUREMENT Temperature Range –40 +85 °C Resolution Differential Method(3) 1.6 °C TEMP0(4) 0.3 °C Accuracy Differential Method(3) ±2 °C TEMP0(4) ±3 °C 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, 50kΩ Pull-Up 0.8 V Data Format Straight Binary POWER-SUPPLY REQUIREMENTS +VCC(5) Specified Performance 2.7 3.6 V Operating Range 2.2 5.25 V Quiescent Current Internal Reference Off 280 650 µA Internal Reference On 780 µA fSAMPLE = 12.5kHz 220 µA Power-Down Mode with 3 µA CS = DCLK = DIN = +VCC Power Dissipation +VCC = +2.7V 1.8 mW TEMPERATURE RANGE Specified Performance –40 +85 °C NOTES: (1) LSB means least significant bit. With VREF equal to +2.5V, one LSB is 610µV. (2) Ensured by design, but not tested. Exceeding 50mA source current may result in device degradation. (3) Difference between TEMP0 and TEMP1 measurement. No calibration necessary. (4) Temperature drift is –2.1mV/ °C. (5) ADS7846 operates down to 2.2V. ADS7846E PARAMETER CONDITIONS MIN TYP MAX UNITS ELECTRICAL CHARACTERISTICS At TA = –40°C to +85°C, +VCC = +2.7V, VREF = 2.5V internal voltage, fSAMPLE = 125kHz, fCLK = 16 • fSAMPLE = 2MHz, 12-bit mode, and digital inputs = GND or +VCC, unless otherwise noted. |
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