參數(shù)資料
型號: MAX5322EAI+
廠商: Maxim Integrated Products
文件頁數(shù): 5/18頁
文件大小: 0K
描述: IC DAC 12BIT DUAL 10V SER 28SSOP
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 46
設(shè)置時間: 10µs
位數(shù): 12
數(shù)據(jù)接口: 串行
轉(zhuǎn)換器數(shù)目: 2
電壓電源: 模擬和數(shù)字,雙 ±
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 28-SSOP(0.209",5.30mm 寬)
供應(yīng)商設(shè)備封裝: 28-SSOP
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)品目錄頁面: 1397 (CN2011-ZH PDF)
Detailed Description
The MAX5322 dual, 12-bit DAC operates from either
single or dual analog supplies. Dual ±12V to ±15V
power supplies provide bipolar ±5V to ±10V outputs, or
unipolar 0V to 10V outputs. Single 12V to 15V analog
power supplies only provide unipolar 0 to 10V outputs.
The reference inputs accept voltages from 2V to 5.25V.
The DAC features INL and DNL less than ±1 LSB (max),
a fast 10s settling time, and a hardware shutdown
mode that reduces current consumption to 2.8A. The
device features a 10MHz SPI-/QSPI-/MICROWIRE-com-
patible serial interface that operates with 3V or 5V logic,
an asynchronous load input, and a serial-data output.
The device offers a CLR that sets the DAC outputs to 0V.
Figure 1 shows the functional diagram of the MAX5322.
Serial Interface
An SPI-/QSPI-/MICROWIRE-compatible serial interface
allows complete control of the DAC through a 16-bit
control word. The first 4 bits form the control bits that
determine register loading and software shutdown
functions. The last 12 bits form the DAC data. The 16-
bit word is entered MSB first.
Table 1 shows the serial-data control-word format.
Table 2 shows the interface commands. The MAX5322
can be programmed while in shutdown.
The serial interface contains five registers: a 16-bit shift
register, two 12-bit input registers, and two 12-bit DAC
registers (Figure 1). The shift register accepts data
from the serial interface. The input registers act as
holding registers for data going to the DAC registers
MAX5322
±10V, Dual, 12-Bit, Serial, Voltage-Output DAC
______________________________________________________________________________________
13
CONTROL BITS
DATA BITS
MSB
LSB
C3
C2
C1
C0
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Table 1. Control-Word Format
16-BIT SERIAL WORD
CONTROL BITS
DATA BITS
C3
C2
C1
C0
D11–D0
FUNCTION
0
XXXXXXXXXXXX
No operation (NOP).
0
1
12-bit DAC data
Load both DAC registers and both input registers from the shift register.
(Start both DACs with new data.)
0
1
0
12-bit DAC data
Load input register A from the shift register; DAC registers are unchanged.
0
1
12-bit DAC data
Load input register B from the shift register; DAC registers are unchanged.
0
1
0
12-bit DAC data
Load DAC register A and input register A from the shift register.
0
1
0
1
12-bit DAC data
Load DAC register B and input register B from the shift register.
0
1
0
XXXXXXXXXXXX
Update DAC register A from input register A (no data sent).
0
1
XXXXXXXXXXXX
Update DAC register B from input register B (no data sent).
1
0
XXXXXXXXXXXX
Shut down DAC A (provided
SHDN = 1).
1
0
1
XXXXXXXXXXXX
Shut down DAC B (provided
SHDN = 1).
1
0
1
0
XXXXXXXXXXXX
Update both DAC registers from their respective input registers.
(Start both DACs with data previously stored in the input register.)
1
0
1
XXXXXXXXXXXX
Shut down both DACs (provided
SHDN = 1).
1
0
XXXXXXXXXXXX
Power up DAC A (no change to any registers).
1
0
1
XXXXXXXXXXXX
Power up DAC B (no change to any registers).
1
0
XXXXXXXXXXXX
Power up both DACs (no change to any registers).
1
XXXXXXXXXXXX
Not used.
Table 2. Serial-Interface Programming Commands
X = Don’t care.
Note: The DACs can be programmed in shutdown mode.
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