Datasheet > AD5259

AD5259

更新时间： 2022-12-12 22:39:59

品牌	Logo	应用领域
亚德诺 - ADI		电位器
页数	文件大小	规格书
24页	989K
描述
Nonvolatile, I2C-Compatible 256-Position, Digital Potentiometer

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AD5259 数据手册

AD5259

TIMING CHARACTERISTICS

V_DD= V_LOGIC= 5 V 10% or 3 V 10%ꢀ V_A= V_DDꢀ V_B= 0 Vꢀ −40°C < T_A< +85°C, unless otherwise noted.

Table 2.

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

I²C INTERFACE TIMING

CHARACTERISTICS¹

SCL Clock Frequency

t_BUFBus Free Time Between Stop

and Start

f_SCL

t₁

1.3

4±±

kHz

μs

t_HD;STAHold Time (Repeated Start)

t₂

After this period, the first clock pulse is

generated.

±.6

μs

t_LOWLow Period of SCL Clock

t_HIGHHigh Period of SCL Clock

t_SU;STASetup Time for Repeated

Start Condition

t₃

t₄

t₅

1.3

±.6

μs

t_HD;DATData Hold Time

t_SU;DATData Setup Time

t_FFall Time of Both SDA and

SCL Signals

t_RRise Time of Both SDA and

SCL Signals

t₆

t₇

t₈

1±±

±.9

μs

3±±

t₉

t_SU;STOSetup Time for Stop Condition

EEPROM Data Storing Time

EEPROM Data Restoring Time at

Power On²

t_1±

±.6

μs

t_{EEMEM_STORE}

3±±

t_{EEMEM_RESTORE1}V_DDrise time dependent. Measure without

decoupling capacitors at V_DDand GND.

EEPROM Data Restoring Time upon

t_{EEMEM_RESTORE2}V_DD= 5 V.

3±±

54±

μs

Restore Command²

EEPROM Data Rewritable Time³

FLASH/EE MEMORY RELIABILITY

Endurance⁴

t_{EEMEM_REWRITE}

1±±

7±±

1±±

kCycles

Years

Data Retention⁵

¹Standard I²C mode operation guaranteed by design.

²During power-up, the output is momentarily preset to midscale before restoring EEPROM content.

³Delay time after power-on PRESET prior to writing new EEPROM data.

⁴Endurance is qualified to 1±±,±±± cycles per JEDEC Std. 22 method A117, and is measured at –4±°C, +25°C, and +85°C; typical endurance at +25°C is 7±±,±±± cycles.

⁵Retention lifetime equivalent at junction temperature (T_J) = 55°C per JEDEC Std. 22, Method A117. Retention lifetime based on an activation energy of ±.6 eV derates

with junction temperature.

t₂

t₈

t₆

t₉

SCL

SDA

t₁₀

t₄

t₇

t₅

t₂

t₃

t₉

t₈

t₁

Figure 4. I²C Interface Timing Diagram

Rev. A | Page 5 of 24

1 2 3 456 7 8...24

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