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AD8400AR50 Datasheet(PDF) 2 Page - Analog Devices |
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AD8400AR50 Datasheet(HTML) 2 Page - Analog Devices |
2 / 20 page 10 k VERSION ELECTRICAL CHARACTERISTICS Parameter Symbol Conditions Min Typ 1 Max Units DC CHARACTERISTICS RHEOSTAT MODE Specifications Apply to All VRs Resistor Differential NL 2 R-DNL RWB, VA = NC –1 ±1/4 +1 LSB Resistor Nonlinearity 2 R-INL RWB, VA = NC –2 ±1/2 +2 LSB Nominal Resistance 3 RTA = +25°C, Model: AD840XYY10 8 10 12 k Ω Resistance Tempco ∆R AB/ ∆TV AB = VDD, Wiper = No Connect 500 ppm/ °C Wiper Resistance RW IW = 1 V/R 50 100 Ω Nominal Resistance Match ∆R/R O CH 1 to 2, 3, or 4, VAB = VDD, TA = +25 °C 0.2 1 % DC CHARACTERISTICS POTENTIOMETER DIVIDER Specifications Apply to All VRs Resolution N 8 Bits Integral Nonlinearity 4 INL –2 ±1/2 +2 LSB Differential Nonlinearity 4 DNL VDD = +5 V –1 ±1/4 +1 LSB DNL VDD = +3 V TA = +25 °C–1 ±1/4 +1 LSB DNL VDD = +3 V TA = –40°C, +85°C –1.5 ±1/2 +1.5 LSB Voltage Divider Tempco ∆V W/ ∆T Code = 80H 15 ppm/ °C Full-Scale Error VWFSE Code = FFH –4 –2.8 0 LSB Zero-Scale Error VWZSE Code = 00H 0 +1.3 +2 LSB RESISTOR TERMINALS Voltage Range 5 VA, B, W 0VDD V Capacitance 6 Ax, Bx CA, B f = 1 MHz, Measured to GND, Code = 80H 75 pF Capacitance 6 Wx CW f = 1 MHz, Measured to GND, Code = 80H 120 pF Shutdown Current 7 IA_SD VA = VDD, VB = 0 V, SHDN = 0 0.01 5 µA Shutdown Wiper Resistance RW_SD VA = VDD, VB = 0 V, SHDN = 0, VDD = +5 V 100 200 Ω DIGITAL INPUTS & OUTPUTS Input Logic High VIH VDD = +5 V 2.4 V Input Logic Low VIL VDD = +5 V 0.8 V Input Logic High VIH VDD = +3 V 2.1 V Input Logic Low VIL VDD = +3 V 0.6 V Output Logic High VOH RL = 1 kΩ to VDD VDD–0.1 V Output Logic Low VOL IOL = 1.6 mA, VDD = +5 V 0.4 V Input Current IIL VIN = 0 V or +5 V, VDD = +5 V ±1 µA Input Capacitance 6 CIL 5pF POWER SUPPLIES Power Supply Range VDD Range 2.7 5.5 V Supply Current (CMOS) IDD VIH = VDD or VIL = 0 V 0.01 5 µA Supply Current (TTL)8 IDD VIH = 2.4 V or 0.8 V, VDD = +5.5 V 0.9 4 mA Power Dissipation (CMOS) 9 PDISS VIH = VDD or VIL = 0 V, VDD = +5.5 V 27.5 µW Power Supply Sensitivity PSS VDD = +5 V ± 10% 0.0002 0.001 %/% PSS VDD = +3 V ± 10% 0.006 0.03 %/% DYNAMIC CHARACTERISTICS 6, 10 Bandwidth –3 dB BW_10K R = 10 k Ω 600 kHz Total Harmonic Distortion THDW VA = 1 V rms + 2 V dc, VB = 2 V dc, f = 1 kHz 0.003 % VW Settling Time tS VA = VDD, VB = 0 V, ± 1% Error Band 2 µs Resistor Noise Voltage eNWB RWB = 5 k Ω, f = 1 kHz, RS = 0 9 nV/ √Hz Crosstalk11 CT VA = VDD, VB = 0 V –65 dB NOTES FOR 10 k Ω VERSION 1 Typicals represent average readings at +25 °C and V DD = +5 V. 2 Resistor position nonlinearity error R-INL is the deviation from an ideal value measured between the maximum resistance and the minimum resistance wiper positions. R-DNL measures the relative step change from ideal between successive tap positions. Parts are guaranteed monotonic. See Figure 30 test circuit. IW = 50 µA for V DD = +3 V and IW = 400 µA for V DD = +5 V for the 10 k Ω versions. 3 V AB = VDD, Wiper (VW) = No Connect. 4 INL and DNL are measured at V W with the RDAC configured as a potentiometer divider similar to a voltage output D/A converter. V A = VDD and VB = 0 V. DNL Specification limits of ± 1 LSB maximum are Guaranteed Monotonic operating conditions. See Figure 29 test circuit. 5 Resistor terminals A, B, W have no limitations on polarity with respect to each other. 6 Guaranteed by design and not subject to production test. Resistor-terminal capacitance tests are measured with 2.5 V bias on the measured terminal. The remaining resistor terminals are left open circuit. 7 Measured at the Ax terminals. All Ax terminals are open circuited in shutdown mode. 8 Worst case supply current consumed when input logic level at 2.4 V, standard characteristic of CMOS logic. See Figure 21 for a plot of I DD versus logic voltage. 9 P DISS is calculated from (IDD × VDD). CMOS logic level inputs result in minimum power dissipation. 10 All Dynamic Characteristics use V DD = +5 V. 11 Measured at a V W pin where an adjacent VW pin is making a full-scale voltage change. Specifications subject to change without notice. AD8400/AD8402/AD8403–SPECIFICATIONS (VDD = +3 V 10% or + 5 V 10%, VA = +VDD, VB = 0 V, –40 C ≤ T A ≤ +85 C unless otherwise noted) REV. B –2– |
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