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DAC8820 Fiches technique(PDF) 4 Page - Texas Instruments |
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DAC8820 Fiches technique(HTML) 4 Page - Texas Instruments |
4 / 22 page www.ti.com PIN ASSIGNMENTS REF R COM R1 R OFS R FB I OUT AGND LDAC WR D15 D14 D13 D12 D11 RST D0 D1 D2 D3 V DD DGND D4 D5 D6 D7 D8 D9 D10 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 DAC8820 DAC8820 SBAS358C – AUGUST 2005 – REVISED JUNE 2006 ELECTRICAL CHARACTERISTICS (continued) All specifications at –40 °C to +85°C, V DD = +2.7 V to +5.5 V, IOUT = virtual GND, GND = 0 V, VREF = 10 V, and TA = full operating temperature, unless otherwise noted. DAC8820 PARAMETER CONDITIONS MIN TYP MAX UNITS POWER REQUIREMENTS VDD 2.7 5.5 V IDD (normal operation) Logic inputs = 0 V 5 µA VDD = +4.5 V to +5.5 V VIH = VDD and VIL = GND 3 5 µA VDD = +2.7 V to +3.6 V VIH = VDD and VIL = GND 1 2.5 µA AC CHARACTERISTICS(2) Output current settling time 0.5 µs Reference multiplying BW VREF = 5 VPP, Data = FFFFh 8 MHz VREF = 0 V to 10 V, DAC glitch impulse 2 nV–s Data = 7FFFh to 8000h to 7FFFh Feedthrough error VOUT/VREF Data = 0000h, VREF = 10 kHz, ±10VPP –70 dB LDAC = Logic low, VREF = –10 V to + 10 V Digital feedthrough 1 nV–s Any code change Total harmonic distortion VREF = 6VRMS, Data = FFFFh, f = 1kHz –105 dB Output spot noise voltage 10 nV/ √Hz (2) Specified by design and characterization; not production tested. PIN # NAME DESCRIPTION Center tap of two 4-quadrant resistors 2 RCOM (R1 and R2). 3 R1 4-quadrant resistor (R1). 4 ROFS Bipolar offset resistor 5 RFB Internal matching feedback resistor 6 IOUT DAC current output 7 AGND Analog ground Digital input load DAC control. When LDAC 8 LDAC is high, data is loaded from input register into a DAC register, updating the DAC output. Write control digital input. Active low. When WR is taken to logic low, data is loaded from 9 WR the digital input pins (D0–D15) into a16-bit input register. 10–2 D15–D4 Digital input data bits. D15 is MSB. 1 22 DGND Digital ground 23 VDD Positive power supply 24–2 D3–D0 Digital Input data bits. D0 is LSB. 7 Reset. Active low. When RST is taken to logic low, the DAC output and all internal 28 RST registers are set to zero code for the DAC8820. TERMINAL FUNCTIONS PIN # NAME DESCRIPTION Reference input and 4-quadrant Resistor 1 REF (R2). 4 Submit Documentation Feedback |
Numéro de pièce similaire - DAC8820 |
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Description similaire - DAC8820 |
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