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TSC2046IPWR Folha de dados(PDF) 3 Page - Texas Instruments |
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TSC2046IPWR Folha de dados(HTML) 3 Page - Texas Instruments |
3 / 32 page TSC2046 SBAS265G − OCTOBER 2002 − REVISED JANUARY 2008 www.ti.com 3 ELECTRICAL CHARACTERISTICS: VS = +2.7V to +5.5V At TA = −40°C to +85°C, +VCC = +2.7V, VREF = 2.5V internal voltage, fSAMPLE = 125kHz, fCLK = 16 • fSAMPLE = 2MHz, 12-bit mode, digital inputs = GND or IOVDD, and +VCC must be ≥ IOVDD, unless otherwise noted. TSC2046 PARAMETER CONDITION MIN TYP MAX UNITS 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 ±6 LSB Gain Error External VREF ±4 LSB 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 = 2.5VPP 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 1 G Ω Accuracy VBAT = 0.5V to 5.5V, External VREF = 2.5V −2 +2 % VBAT = 0.5V to 5.5V, 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 (1) LSB means Least Significant Bit. With VREF = +2.5V, one LSB is 610µV. (2) Assured 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) TSC2046 operates down to 2.2V. (6) IOVDD must be ≤ (+VCC). (7) Combined supply current from +VCC and IOVDD. Typical values obtained from conversions on AUX input with PD0 = 0. |
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