Datasheet AD5235 (Analog Devices) - 5

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Data Sheet AD5235 Parameter Symbol Conditions Min Typ1 Max Unit
POWER SUPPLIES Single-Supply Power Range VDD VSS = 0 V 2.7 5.5 V Dual-Supply Power Range VDD/VSS ±2.25 ±2.75 V Positive Supply Current IDD VIH = VDD or VIL = GND 2 5 µA Negative Supply Current ISS VDD = +2.5 V, VSS = −2.5 V VIH = VDD or VIL = GND −4 −2 µA EEMEM Store Mode Current IDD (store) VIH = VDD or VIL = GND, 2 mA VSS = GND, ISS ≈ 0 ISS (store) VDD = +2.5 V, VSS = −2.5 V −2 mA EEMEM Restore Mode Current7 IDD (restore) VIH = VDD or VIL = GND, 320 µA VSS = GND, ISS ≈ 0 ISS (restore) VDD = +2.5 V, VSS = −2.5 V −320 µA Power Dissipation8 PDISS VIH = VDD or VIL = GND 10 30 µW Power Supply Sensitivity5 PSS ∆VDD = 5 V ± 10% 0.006 0.01 %/% DYNAMIC CHARACTERISTICS5, 9 Bandwidth BW −3 dB, RAB = 25 kΩ/250 kΩ 125/12 kHz Total Harmonic Distortion THDW VA = 1 V rms, VB = 0 V, f = 1 kHz, code = midscale RAB = 25 kΩ 0.009 % RAB = 250 kΩ 0.035 % VW Settling Time tS VA = VDD, VB = 0 V, VW = 0.50% error band, from zero scale to midscale RAB = 25 kΩ 4 µs RAB = 250 kΩ 36 µs Resistor Noise Density eN_WB RAB = 25 kΩ/250 kΩ 20/64 nV/√Hz Crosstalk (CW1/CW2) CT VA1 = VDD, VB1 = VSS , measured VW2 30/60 nV-s with VW1 making full-scale change, RAB = 25 kΩ/250 kΩ Analog Crosstalk CTA VAB2 = 5 V p-p, f = 1 kHz, measured −110/−100 dB VW1, Code 1 = midscale, Code 2 = full scale, RAB = 25 kΩ/250 kΩ 1 Typicals represent average readings at 25°C and VDD = 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. IWB = (VDD − 1)/RWB (see Figure 27). 3 INL and DNL are measured at VW with the RDAC configured as a potentiometer divider similar to a voltage output DAC. VA = VDD and VB = VSS. DNL specification limits of ±1 LSB maximum are guaranteed monotonic operating conditions (see Figure 28). 4 Resistor Terminal A, Resistor Terminal B, and Resistor Terminal W have no limitations on polarity with respect to each other. Dual-supply operation enables ground- referenced bipolar signal adjustment. 5 Guaranteed by design and not subject to production test. 6 Common-mode leakage current is a measure of the dc leakage from any Terminal A, Terminal B, or Terminal W to a common-mode bias level of VDD/2. 7 EEMEM restore mode current is not continuous. Current is consumed while EEMEM locations are read and transferred to the RDAC register. 8 PDISS is calculated from (IDD × VDD) + (ISS × VSS). 9 All dynamic characteristics use VDD = +2.5 V and VSS = −2.5 V. Rev. F | Page 5 of 32 Document Outline Features Applications General Description Functional Block Diagram Revision History Specifications Electrical Characteristics—25 kΩ, 250 kΩ Versions Interface Timing and EEMEM Reliability Characteristics—25 kΩ, 250 kΩ Versions Timing Diagrams Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Test Circuits Theory of Operation Scratchpad and EEMEM Programming Basic Operation EEMEM Protection Digital Input and Output Configuration Serial Data Interface Daisy-Chain Operation Terminal Voltage Operating Range Power-Up Sequence Layout and Power Supply Bypassing Advanced Control Modes Linear Increment and Decrement Instructions Logarithmic Taper Mode Adjustment Using to Re-Execute a Previous Command Using Additional Internal Nonvolatile EEMEM Calculating Actual End-to-End Terminal Resistance RDAC Structure Programming the Variable Resistor Rheostat Operation Programming the Potentiometer Divider Voltage Output Operation Programming Examples EVAL-AD5235SDZ Evaluation Kit Applications Information Bipolar Operation from Dual Supplies Gain Control Compensation High Voltage Operation DAC Bipolar Programmable Gain Amplifier 10-Bit Bipolar DAC Programmable Voltage Source with Boosted Output Programmable Current Source Programmable Bidirectional Current Source Programmable Low-Pass Filter Programmable Oscillator Optical Transmitter Calibration with ADN2841 Resistance Scaling Resistance Tolerance, Drift, and Temperature Coefficient Mismatch Considerations RDAC Circuit Simulation Model Outline Dimensions Ordering Guide