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AD7945AN-B Datasheet(PDF) 3 Page - Analog Devices |
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AD7945AN-B Datasheet(HTML) 3 Page - Analog Devices |
3 / 16 page AD7943/AD7945/AD7948 REV. B –3– Parameter A Grades2 Units Test Conditions/Comments ACCURACY Resolution 12 Bits 1 LSB = (VIOUT1 – VREF)/2 12 = 300 µV When VIOUT1 = 1.23 V and VREF = 0 V Relative Accuracy ±1 LSB max Differential Nonlinearity ±0.9 LSB max All Grades Guaranteed Monotonic over Temperature Gain Error @ +25 °C ±3 LSB max TMIN to TMAX ±4 LSB max Gain Temperature Coefficient 3 2 ppm FSR/ °C typ 5 ppm FSR/ °C max Output Leakage Current See Terminology Section IOUT1 @ +25 °C 10 nA max TMIN to TMAX 100 nA max Typically 20 nA over Temperature Input Resistance This Varies with DAC Input Code @ IOUT2 Pin (AD7943) 6 k Ω min @ AGND Pin (AD7945, AD7948) 6 k Ω min DIGITAL INPUTS VINH, Input High Voltage @ VDD = +5 V 2.4 V min VINH, Input High Voltage @ VDD = +3.3 V 2.1 V min VINL, Input Low Voltage @ VDD = +5 V 0.8 V max VINL, Input Low Voltage @ VDD = +3.3 V 0.6 V max IINH, Input Current ±1 µA max CIN, Input Capacitance 3 10 pF max DIGITAL OUTPUT (SRO) For 1 CMOS Load Output Low Voltage (VOL) 0.2 V max Output High Voltage (VOH)VDD – 0.2 V min POWER REQUIREMENTS VDD Range 3.0/5.5 V min/V max Power Supply Sensitivity 3 ∆Gain/∆V DD –75 dB typ IDD (AD7943) 5 µA max VINH = VDD – 0.1 V min, VINL = 0.1 V max. SRO Open Circuit; No STB Signal; Typically 1 µA. Typically 100 µA with 1 MHz STB Frequency. IDD (AD7945, AD7948) 5 µA max VINH = VDD – 0.1 V min, VINL = 0.1 V max. Typically 1 µA. NOTES 1These specifications apply with the devices biased up at 1.23 V for single supply applications. The model numbering reflects this by means of a “–B” suffix (for example: AD7943AN-B). Figure 16 is an example of Biased Mode Operation. 2Temperature ranges as follows: A Versions: –40 °C to +85°C. 3Guaranteed by design. Specifications subject to change without notice. BIASED MODE SPECIFICATIONS1 (AD7943: VDD = +3 V to +5.5 V; VIOUT1 =VIOUT2 = AGND = 1.23 V; VREF = +0 V to 2.45 V; TA = TMIN to TMAX, unless other- wise noted. AD7945, AD7948: VDD = +3 V to +5.5 V; VIOUT1 = AGND = 1.23 V; VREF = +0 V to 2.45 V; TA = TMIN to TMAX, unless otherwise noted.) |
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