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MCP3919 数据表(PDF) 5 Page - Microchip Technology |
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MCP3919 数据表(HTML) 5 Page - Microchip Technology |
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5 / 88 page  2014 Microchip Technology Inc. DS20005347A-page 5 MCP3919 Internal Voltage Reference Tolerance VREF 1.176 1.2 1.224 V VREFEXT = 0, TA = +25°C only Temperature Coefficient TCVREF — 9 — ppm/°C TA = -40°C to +125°C, VREFEXT = 0, VREFCAL<7:0> = 0x50 Output Impedance ZOUTVREF —0.6 — k VREFEXT = 0 Internal Voltage Reference Operating Current AIDDVREF — 54 — µA VREFEXT = 0, SHUTDOWN<2:0> = 111 Voltage Reference Input Input Capacitance — — 10 pF Differential Input Voltage Range (VREF+ – VREF-) VREF 1.1 — 1.3 V VREFEXT = 1 Absolute Voltage on REFIN+ pin VREF+ VREF- +1.1 —VREF- +1.3 V VREFEXT = 1 Absolute Voltage REFIN- pin VREF- -0.1 — +0.1 V REFIN- should be connected to AGND when VREFEXT = 0 Master Clock Input Master Clock Input Frequency Range fMCLK — — 20 MHz CLKEXT = 1, (Note 7) Crystal Oscillator Operating Frequency Range fXTAL 1 — 20 MHz CLKEXT = 0, (Note 7) Analog Master Clock AMCLK — — 16 MHz (Note 7) Crystal Oscillator Operating Current DIDDXTAL — 80 — µA CLKEXT = 0 Power Supply Operating Voltage, Analog AVDD 2.7 — 3.6 V Operating Voltage, Digital DVDD 2.7 — 3.6 V TABLE 1-1: ANALOG SPECIFICATIONS (CONTINUED) Electrical Specifications: Unless otherwise indicated, all parameters apply at AVDD = DVDD = 3V, MCLK = 4 MHz; PRE<1:0> = 00 ; OSR = 256; GAIN = 1; VREFEXT = 0, CLKEXT = 1, DITHER<1:0> = 11; BOOST<1:0> = 10, VCM =0V; TA = -40°C to +125°C;VIN = -0.5 dBFS @ 50/60 Hz on all channels. Characteristic Sym. Min. Typ. Max. Units Conditions Note 1: Dynamic Performance specified at -0.5 dB below the maximum differential input value, VIN =1.2 VPP = 424 mVRMS @ 50/60 Hz, VREF = 1.2V. See Section 4.0 “Terminology And Formulas” for definition. This parameter is established by characterization and not 100% tested. 2: For these operating currents, the following configuration bit settings apply: SHUTDOWN<2:0> = 000 , RESET<2:0> = 000 , VREFEXT = 0, CLKEXT = 0. 3: For these operating currents, the following configuration bit settings apply: SHUTDOWN<2:0> = 111 , VREFEXT = 1, CLKEXT = 1. 4: Measured on one channel versus all others channels. The specification is the average of crosstalk performance over all channels (see Figure 2-32 for individual channel performance). 5: Applies to all gains. Offset and gain errors depend on PGA gain setting, see typical performance curves for typical performance. 6: Outside of this range, ADC accuracy is not specified. An extended input range of +/-2V can be applied continuously to the part with no damage. 7: For proper operation and for optimizing ADC accuracy, AMCLK should be limited to the maximum frequency defined in Table 5-2, as a function of the BOOST and PGA setting chosen. MCLK can take larger values as long as the prescaler settings (PRE<1:0>) limit AMCLK = MCLK/PRESCALE in the defined range in Table 5-2. 8: This parameter is established by characterization and not 100% tested. |
类似零件编号 - MCP3919 |
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类似说明 - MCP3919 |
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