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AD7948 데이터시트(PDF) 2 Page - Analog Devices |
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AD7948 데이터시트(HTML) 2 Page - Analog Devices |
2 / 16 page REV. B –2– AD7943/AD7945/AD7948–SPECIFICATIONS1 Parameter B Grades 2 T Grade 2, 3 Units Test Conditions/Comments ACCURACY Resolution 12 12 Bits 1 LSB = VREF/2 12 = 2.44 mV when V REF =10 V Relative Accuracy ±0.5 ±0.5 LSB max Differential Nonlinearity ±0.5 ±0.5 LSB max All Grades Guaranteed Monotonic over Temperature Gain Error TMIN to TMAX ±2 ±2 LSB max Gain Temperature Coefficient 4 2 2 ppm FSR/ °C typ 5 5 ppm FSR/ °C max Output Leakage Current IOUT1 @ +25 °C 10 10 nA max See Terminology Section TMIN to TMAX 100 100 nA max Typically 20 nA over Temperature REFERENCE INPUT Input Resistance 6 6 k Ω min Typical Input Resistance = 9 k Ω 12 12 k Ω max DIGITAL INPUTS VINH, Input High Voltage 2.4 2.4 V min VINL, Input Low Voltage 0.8 0.8 V max IINH, Input Current ±1 ±1 µA max CIN, Input Capacitance 4 10 10 pF max DIGITAL OUTPUT (AD7943 SRO) For 1 CMOS Load Output Low Voltage (VOL) 0.2 0.2 V max Output High Voltage (VOH)VDD – 0.2 VDD – 0.2 V min POWER REQUIREMENTS VDD Range 4.5/5.5 4.5/5.5 V min/V max Power Supply Sensitivity 4 ∆Gain/∆V DD –75 –75 dB typ IDD (AD7943) 5 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 a 1 MHz STB Frequency. At Input Levels of 0.8 V and 2.4 V, IDD Is Typically 2.5 mA. IDD (AD7945, AD7948) 5 5 µA max VINH = VDD – 0.1 V min, VINL = 0.1 V max. Typically 1 µA. At Input Levels of 0.8 V and 2.4 V, IDD Is Typically 2.5 mA. NOTES 1The AD7943, AD7945 and AD7948 are specified in the normal current mode configuration and in the biased current mode for single-supply applications. Figures 14 and 15 are examples of normal mode operation. 2Temperature ranges as follows: B Grades: –40 °C to +85°C; T Grade: –55°C to +125°C. 3The T Grade applies to the AD7945 only. 4Guaranteed by design. Specifications subject to change without notice. NORMAL MODE (AD7943: VDD = +4.5 V to +5.5 V; VIOUT1 = VIOUT2 = AGND = 0 V; VREF = +10 V; TA = TMIN to TMAX, unless otherwise noted. AD7945, AD7948: VDD = +4.5 V to +5.5 V; VIOUT1 = AGND = 0 V; VREF = +10 V; TA = TMIN to TMAX, unless otherwise noted.) |
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