AD5255BRU250-RL7 Analog Devices Inc, AD5255BRU250-RL7 Datasheet
AD5255BRU250-RL7
Specifications of AD5255BRU250-RL7
Related parts for AD5255BRU250-RL7
AD5255BRU250-RL7 Summary of contents
Page 1
FEATURES 3 channels Dual 512 position Single 128 position 25 kΩ or 250 kΩ full-scale resistance Low temperature coefficient Potentiometer divider 15 ppm/°C Rheostat mode 35 ppm/°C Nonvolatile memory retains wiper settings Permanent memory write protection Linear increment/decrement ±6 dB ...
Page 2
AD5255 TABLE OF CONTENTS Electrical Characteristics ................................................................. 3 Absolute Maximum Ratings............................................................ 6 ESD Caution.................................................................................. 6 Pin Configuration and Function Descriptions............................. 7 Typical Performance Characteristics ............................................. 8 Interface Descriptions.................................................................... Interface ................................................................................ 10 EEPROM Interface..................................................................... 11 2 RDAC ...
Page 3
ELECTRICAL CHARACTERISTICS Single supply 2 5.5 V and −40°C < Dual supply +2. +2. Table 1. Parameter DC CHARACTERISTICS, RHEOSTAT MODE 2 Resistor Differential Nonlinearity 2 Resistor ...
Page 4
AD5255 Parameter DIGITAL INPUTS AND OUTPUTS Input Logic High Input Logic Low Output Logic High (SDA) Output Logic Low WP Leakage Current A0 Leakage Current Input Leakage Current (Excluding WPand A0) 5 Input Capacitance POWER SUPPLIES Single-Supply Power Range Dual-Supply ...
Page 5
Single supply 5.5 V and −40°C < Dual supply 2. 2. Table 2. Parameter 2, 3 DYNAMIC CHARACTERISTICS Bandwidth −3 dB Total Harmonic Distortion V ...
Page 6
AD5255 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 3. Parameter V to GND GND GND ...
Page 7
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic Description 1 A0_EE Device Address 0 for EEMEM A1_RDAC I C Device Address 1 for RDAC A0_RDAC I C Device ...
Page 8
AD5255 TYPICAL PERFORMANCE CHARACTERISTICS 1 –40°C, +25°C, +85°C SUPERIMPOSED 0.8 DD 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1 128 192 256 320 CODE (DECIMAL) Figure 4. INL—9-Bit RDAC 1.50 T ...
Page 9
T = –40°C, +25°C, +85°C SUPERIMPOSED A 0 0.3 0.2 0.1 0 –0.1 –0.2 –0.3 –0.4 –0 CODE (DECIMAL) Figure 10. R-INL—7-Bit RDAC 0 –40°C, +25°C, ...
Page 10
AD5255 INTERFACE DESCRIPTIONS INTERFACE All control and access to both EEPROM memory and the RDAC registers are conducted via a standard 2-wire I Figure 2 shows the timing characteristics of the I Figure 16 and Figure 17 ...
Page 11
EEPROM INTERFACE EEPROM SLAVE ADDRESS 0 WRITE EEPROM SLAVE ADDRESS 1 READ S SLAVE ADDRESS W ...
Page 12
AD5255 A random read operation is shown in Figure 21. This operation changes the address counter to the specified memory address by performing a dummy write and then performing a read operation beginning at the new address counter location. 2 ...
Page 13
Table 6. RDAC R/ W EEPROM Addresses (CMD/ REG = 0, EE/ RDAC = ...
Page 14
AD5255 RDAC Shortcut Commands Eleven shortcut commands are provided for easy manipulation of RDAC registers and their corresponding EEPROM memory locations. These commands are shown in Table 9. A more detailed discussion about the RDAC shortcut commands can be found ...
Page 15
THEORY OF OPERATION The AD5255 digital potentiometer operates as a true variable resistor. The RDAC register contents determine the resistor wiper position. The RDAC register acts like a scratchpad register, allowing unlimited resistance setting changes. RDAC register contents are changed ...
Page 16
AD5255 USING ADDITIONAL INTERNAL NONVOLATILE EEPROM The AD5255 contains additional internal user EEPROM for saving constants and other data. The user EEPROM I word follows the same format as the general-purpose EEPROM memory shown in Figure 19 and Figure 20. ...
Page 17
POWER-UP SEQUENCE Since the ESD protection diodes limit the voltage compliance at the A, B, and W terminals (Figure 30 important to power V /V before applying any voltage to the A, B, and terminals. ...
Page 18
AD5255 For RDAC0 and RDAC1 × 512 For RDAC2 × 128 where D is the decimal ...
Page 19
APPLICATIONS LASER DIODE DRIVER (LDD) CALIBRATION The AD5255 can be used with any laser diode driver. Its high resolution, compact footprint, and superior temperature drift characteristics make it ideal for optical parameter setting. The ADN2841 is a 2.7 Gbps laser ...
Page 20
... AD5255BRU25-RL7 −40°C to +85°C AD5255BRU250 −40°C to +85°C 1 AD5255BRUZ250 −40°C to +85°C AD5255BRU250-RL7 −40°C to +85° Pb-free part. 2 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 ...