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參數(shù)資料

型號(hào)：	MAX5523EUA+
廠商：	Maxim Integrated Products
文件頁(yè)數(shù)：	8/23頁(yè)
文件大小：	0K
描述：	IC DAC 10BIT DUAL ULP 8-UMAX
產(chǎn)品培訓(xùn)模塊：	Lead (SnPb) Finish for COTS Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝：	50
設(shè)置時(shí)間：	660µs
位數(shù)：	10
數(shù)據(jù)接口：	MICROWIRE?，QSPI?，串行，SPI?
轉(zhuǎn)換器數(shù)目：	2
電壓電源：	單電源
功率耗散（最大）：	471mW
工作溫度：	-40°C ~ 85°C
安裝類型：	表面貼裝
封裝/外殼：	8-TSSOP，8-MSOP（0.118"，3.00mm 寬）
供應(yīng)商設(shè)備封裝：	8-uMAX
包裝：	管件
輸出數(shù)目和類型：	2 電壓，單極；2 電壓，雙極
采樣率（每秒）：	*
產(chǎn)品目錄頁(yè)面：	1397 (CN2011-ZH PDF)

Power Modes

The MAX5522–MAX5525 feature two power modes to

conserve power during idle periods. In normal opera-

tion, the device is fully operational. In shutdown mode,

the device is completely powered down, including the

internal voltage reference in the MAX5523/MAX5525.

The MAX5523/MAX5525 also offer a standby mode in

which all circuitry is powered down except the internal

voltage reference. Standby mode keeps the reference

powered up while the remaining circuitry is shut down,

allowing it to be used as a system reference. It also

helps reduce the wake-up delay by not requiring the ref-

erence to power up when returning to normal operation.

Shutdown Mode

The MAX5522–MAX5525 feature a software-program-

mable shutdown mode that reduces the supply current

and the interface input-current to 0.18A (max). Writing

an input control word with control bits C[3:0] = 1110

(Table 2) places the device in shutdown mode. In shut-

down, the MAX5522/MAX5524 reference input and DAC

output buffers go high impedance. Placing the MAX5523/

MAX5525 into shutdown turns off the internal reference

and the DAC output buffers go high impedance. The seri-

al interface still remains active for all devices.

Table 2 shows several commands that bring the

MAX5522–MAX5525 back to normal operation. The

power-up time from shutdown is required before the

DAC outputs are valid.

Note: For the MAX5523/MAX5525, standby mode can-

not be entered directly from shutdown mode. The

device must be brought into normal operation first

before entering standby mode.

Standby Mode (MAX5523/MAX5525 Only)

The MAX5523/MAX5525 feature a software-program-

mable standby mode that reduces the typical supply

current to 3A (max). Standby mode powers down all

circuitry except the internal voltage reference. Place

the device in standby mode by writing an input control

word with control bits C[3:0] = 1100 (Table 2). The

internal reference and serial interface remain active

while the DAC output buffers go high impedance.

For the MAX5523/MAX5525, standby mode cannot be

entered directly from shutdown mode. The device must

be brought into normal operation first before entering

standby mode. To enter standby from shutdown, issue

the command to return to normal operation followed

immediately by the command to go into standby.

Table 2 shows several commands that bring the

MAX5523/MAX5525 back to normal operation. When

transitioning from standby mode to normal operation,

only the DAC power-up time is required before the DAC

outputs are valid.

Reference Input

The MAX5522/MAX5524 accept a reference with a volt-

age range extending from 0 to VDD. The output voltage

(VOUT) is represented by a digitally programmable volt-

age source as:

VOUT = (VREF x N / 256) x gain

where N is the numeric value of the DAC’s binary input

code (0 to 1023), VREF is the reference voltage, gain is

the externally set voltage gain for the MAX5524, and

gain is one for the MAX5522.

In shutdown mode, the reference input enters a high-

impedance state with an input impedance of 2.5G

(typ).

Reference Output

The MAX5523/MAX5525 internal voltage reference is

software configurable to one of four voltages. Upon

power-up, the default reference voltage is 1.214V.

Configure the reference voltage using D8 and D9 data

bits (Table 3) when the control bits are as follows C[3:0]

= 1100, 1101, or 1110 (Table 2). VDD must be kept at a

minimum of 200mV above VREF for proper operation.

MAX5522–MAX5525

Dual, Ultra-Low-Power,

10-Bit, Voltage-Output DACs

______________________________________________________________________________________

Table 3. Reference Output Voltage

Programming

REFERENCE VOLTAGE (V)

1.214

1.940

2.425

3.885

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