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參數(shù)資料
| 型號： | MAX5841 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 4-Bit Magnitude Comparators 20-LCCC -55 to 125 |
| 中文描述： | 四路、10位、低功耗、２線、串行電壓輸出DAC |
| 文件頁數(shù)： | 8/15頁 |
| 文件大小： | 408K |
| 代理商： | MAX5841 |
M
Quad, 10-Bit, Low-Power, 2-Wire, Serial
Voltage-Output DAC
8
_______________________________________________________________________________________
Detailed Description
The MAX5841 is a quad, 10-bit, voltage-output DAC
with an I
2
C/SMBus-compatible 2-wire interface. The
device consists of a serial interface, power-down cir-
cuitry, four input and DAC registers, four 10-bit resistor
string DACs, four unity-gain output buffers, and output
resistor networks. The serial interface decodes the
address and control bits, routing the data to the proper
input or DAC register. Data can be directly written to
the DAC register, immediately updating the device out-
put, or can be written to the input register without
changing the DAC output. Both registers retain data as
long as the device is powered.
DAC Operation
The MAX5841 uses a segmented resistor string DAC
architecture, which saves power in the overall system
and guarantees output monotonicity. The MAX5841
’
s
input coding is straight binary, with the output voltage
given by the following equation:
where N = 10 (bits), and D = the decimal value of the
input code (0 to 1023).
Output Buffer
The MAX5841 analog outputs are buffered by preci-
sion, unity-gain followers that slew 0.5V/μs. Each buffer
output swings rail-to-rail, and is capable of driving 5k
in parallel with 200pF. The output settles to ±0.5LSB
within 4μs.
Power-On Reset
The MAX5841 features an internal POR circuit that ini-
tializes the device upon power-up. The DAC registers
are set to zero scale and the device is powered down,
with the output buffers disabled and the outputs pulled
to GND through the 100k
termination resistor.
Following power-up, a wake-up command must be initi-
ated before any conversions are performed.
Power-Down Modes
The MAX5841 has three software-controlled low-power
power-down modes. All three modes disable the output
buffers and disconnect the DAC resistor strings from
REF, reducing supply current draw to 1μA and the ref-
erence current draw to less than 1μA. In power-down
mode 0, the device output is high impedance. In
power-down mode 1, the device output is internally
pulled to GND by a 1k
termination resistor. In power-
down mode 2, the device output is internally pulled to
GND by a 100k
termination resistor. Table 1 shows
the power-down mode command words.
Upon wake-up, the DAC output is restored to its previ-
ous value. Data is retained in the input and DAC regis-
ters during power-down mode.
Digital Interface
The MAX5841 features an I
2
C/SMBus-compatible
2-wire interface consisting of a serial data line (SDA)
and a serial clock line (SCL). The MAX5841 is SMBus
compatible within the range of V
DD
= 2.7V to 3.6V. SDA
and SCL facilitate bidirectional communication between
the MAX5841 and the master at rates up to 400kHz.
Figure 1 shows the 2-wire interface timing diagram. The
MAX5841 is a transmit/receive slave-only device, rely-
ing upon a master to generate a clock signal. The mas-
ter (typically a microcontroller) initiates data transfer on
the bus and generates SCL to permit that transfer.
A master device communicates to the MAX5841 by
transmitting the proper address followed by command
and/or data words. Each transmit sequence is framed-
V
V
D
( )
OUT
REF
N
_
=
×
2
Pin Description
PIN
1
2
3
4
5
6
7
8
9
10
NAME
ADD
SCL
V
DD
GND
SDA
REF
OUTA
OUTB
OUTC
OUTD
FUNCTION
Address Select. A logic high sets the address LSB to 1; a logic low sets the address LSB to zero.
Serial Clock Input
Power Supply
Ground
Bidirectional Serial Data Interface
Reference Input
DAC A Output
DAC B Output
DAC C Output
DAC D Output
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX5841LEUB | Quad, 10-Bit, Low-Power, 2-Wire, Serial Voltage-Output DAC |
| MAX5842MEUB | Quad, 12-Bit, Low-Power, 2-Wire, Serial Voltage-Output DAC |
| MAX5842 | 4-Bit Magnitude Comparators 16-CDIP -55 to 125 |
| MAX5842LEUB | Quad, 12-Bit, Low-Power, 2-Wire, Serial Voltage-Output DAC |
| MAX5858AEVKIT | Evaluation Kit for the MAX5858A/MAX5858/MAX5856A |
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| MAX5841LEUB | 功能描述:數(shù)模轉(zhuǎn)換器- DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MAX5841LEUB+ | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 10-Bit 4Ch Precision DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MAX5841LEUB+T | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 10-Bit 4Ch Precision DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MAX5841LEUB-T | 功能描述:數(shù)模轉(zhuǎn)換器- DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MAX5841MEUB | 功能描述:數(shù)模轉(zhuǎn)換器- DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
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