AD5258BRMZ1 Analog Devices Inc, AD5258BRMZ1 Datasheet
AD5258BRMZ1
Specifications of AD5258BRMZ1
Available stocks
Related parts for AD5258BRMZ1
AD5258BRMZ1 Summary of contents
Page 1
FEATURES Nonvolatile memory maintains wiper settings 64-position Compact MSOP- × 4.9 mm) package 2 I C®-compatible interface V pin provides increased interface flexibility LOGIC End-to-end resistance 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ Resistance tolerance stored in ...
Page 2
AD5258 TABLE OF CONTENTS Specifications..................................................................................... 3 Electrical Characteristics............................................................. 3 Timing Characteristics ................................................................ 5 Absolute Maximum Ratings............................................................ 6 ESD Caution.................................................................................. 6 Pin Configuration and Function Descriptions............................. 7 Typical Performance Characteristics ............................................. 8 Test Circuits..................................................................................... 13 Theory of Operation ...................................................................... 14 Programming ...
Page 3
SPECIFICATIONS ELECTRICAL CHARACTERISTICS ± 10 ± 10 LOGIC Table 1. Parameter DC CHARACTERISTICS: RHEOSTAT MODE Resistor Differential Nonlinearity 1 kΩ 10 kΩ/50 kΩ/100 kΩ Resistor Integral Nonlinearity 1 kΩ ...
Page 4
AD5258 Parameter POWER SUPPLIES Power Supply Range Positive Supply Current Logic Supply Logic Supply Current Programming Mode Current (EEPROM) Power Dissipation Power Supply Rejection Ratio DYNAMIC CHARACTERISTICS Bandwidth −3 dB Total Harmonic Distortion V Settling Time W Resistor Noise Voltage ...
Page 5
TIMING CHARACTERISTICS ± 10 ± 10 LOGIC Table 2. Parameter INTERFACE TIMING CHARACTERISTICS SCL Clock Frequency t Bus Free Time between STOP and START BUF t ...
Page 6
AD5258 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 3. Parameter V to GND GND MAX 1 Pulsed Continuous Digital Inputs and Output Voltage to GND ...
Page 7
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic ADO 3 AD1 4 SDA 5 SCL 6 V LOGIC 7 GND AD0 ...
Page 8
AD5258 TYPICAL PERFORMANCE CHARACTERISTICS 5 kΩ 25°C, unless otherwise noted. DD LOGIC AB A 0.5 0.4 0.3 0.2 0.1 0 5.5V –0.1 –0.2 –0.3 –0.4 –0 ...
Page 9
CODE (Decimal) Figure 12. R-INL vs. Code vs. Temperature 0.25 0.20 0.15 0.10 –40°C +25°C 0.05 0 –0.05 –0.10 –0.15 –0.20 –0.25 ...
Page 10
AD5258 250 200 150 1k 100 50k 50 10k 0 –50 100k –100 –150 CODE (Decimal) Figure 18. Rheostat Mode Tempco (ΔR ×10 AB 120 100 50k 20 0 10k 100k ...
Page 11
H – – – – – –36 –42 –48 –54 –60 1k 10k 100k FREQUENCY (Hz) Figure 24. Gain vs. Frequency vs. Code ...
Page 12
AD5258 SCL 2 200ns/DIV Figure 30. Large Signal Settling Time Rev Page ...
Page 13
TEST CIRCUITS Figure 31 through Figure 36 illustrate the test circuits that define the test conditions used in the product specification tables DUT 1LSB = V+/ Figure 31. Test Circuit for Potentiometer ...
Page 14
AD5258 THEORY OF OPERATION The AD5258 is a 64-position digitally controlled variable resistor (VR) device. The wiper’s default value, prior to programming the EEPROM, is midscale. PROGRAMMING THE VARIABLE RESISTOR Rheostat Operation The nominal resistance ( the RDAC ...
Page 15
I C INTERFACE Note that the wiper’s default value, prior to programming the EEPROM, is midscale. 1. The master initiates data transfer by establishing a START condition when a high-to-low transition on the SDA line occurs while SCL is ...
Page 16
AD5258 BYTE FORMATS The following generic, write, read, and store/restore control registers for the AD5258 all refer to the device addresses listed in Table 5, and the mode/condition reference key (S, P, SA, MA, NA ...
Page 17
WRITE MODES Table 8. Writing to RDAC Register 7-Bit Device Address S (See Table 5) Slave Address Byte Table 9. Writing to EEPROM Register 7-Bit Device Address S (See Table 5) Slave Address Byte The wiper’s default value, prior to ...
Page 18
AD5258 TOLERANCE READBACK MODES Table 15. Traditional Readback of Tolerance (Individually) 7-Bit Device Address (See Table Slave Address Byte Instruction Byte 7-Bit Device Address (See Table ...
Page 19
ESD PROTECTION OF DIGITAL PINS AND RESISTOR TERMINALS The AD5258 and GND power supplies define the DD LOGIC boundary conditions for proper 3-terminal and digital input operation. Supply signals present on Terminal A, Terminal B, and ...
Page 20
AD5258 DISPLAY APPLICATIONS CIRCUITRY A special feature of the AD5258 is its unique separation of the V and V supply pins. The reason for doing this is to LOGIC DD provide greater flexibility in applications that do not always provide ...
Page 21
... R (Ω) Model AB AD5258BRMZ1 AD5258BRMZ1- AD5258BRMZ10 AD5258BRMZ10- AD5258BRMZ50 AD5258BRMZ50- AD5258BRMZ100 100 k 1 AD5258BRMZ100-R7 100 k 2 AD5258EVAL Pb-free part. 2 The evaluation board is shipped with the 10 kΩ R 3.00 BSC 10 6 4.90 BSC 3.00 BSC 1 5 PIN 1 0.50 BSC 0.95 0.85 1.10 MAX 0.75 ...
Page 22
AD5258 NOTES Rev Page ...
Page 23
NOTES Rev Page AD5258 ...
Page 24
AD5258 NOTES Purchase of licensed I C components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I C Patent 2 2 Rights to use these components ...