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參數(shù)資料
| 型號： | MAX5842 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 4-Bit Magnitude Comparators 16-CDIP -55 to 125 |
| 中文描述： | 四路、12位、低功耗、２線、串行電壓輸出DAC |
| 文件頁數(shù)： | 10/15頁 |
| 文件大?。?/td> | 462K |
| 代理商： | MAX5842 |
M
Quad, 12-Bit, Low-Power, 2-Wire, Serial
Voltage-Output DAC
10
______________________________________________________________________________________
read operations require S
r
conditions because of the
change in direction of data flow.
Acknowledge Bit (ACK)
The acknowledge bit (ACK) is the ninth bit attached to
any 8-bit data word. ACK is always generated by the
receiving device. The MAX5842 generates an ACK
when receiving an address or data by pulling SDA low
during the ninth clock period. When transmitting data,
the MAX5842 waits for the receiving device to generate
an ACK. Monitoring ACK allows for detection of unsuc-
cessful data transfers. An unsuccessful data transfer
occurs if a receiving device is busy or if a system fault
has occurred. In the event of an unsuccessful data
transfer, the bus master should reattempt communica-
tion at a later time.
Slave Address
A bus master initiates communication with a slave
device by issuing a START condition followed by the
7-bit slave address (Figure 4). When idle, the MAX5842
waits for a START condition followed by its slave
address. The serial interface compares each address
value bit by bit, allowing the interface to power down
immediately if an incorrect address is detected. The
LSB of the address word is the Read/
Write
(R/
W
) bit.
R/
W
indicates whether the master is writing to or read-
ing from the MAX5842 (R/
W
= 0 selects the write condi-
tion, R/
W
= 1 selects the read condition). After
receiving the proper address, the MAX5842 issues an
ACK by pulling SDA low for one clock cycle.
The MAX5842 has four different factory/user-pro-
grammed addresses (Table 2). Address bits A6
through A1 are preset, while A0 is controlled by ADD.
Connecting ADD to GND sets A0 = 0. Connecting ADD
to V
DD
sets A0 = 1. This feature allows up to four
MAX5842s to share the same bus.
Write Data Format
In write mode (R/
W
= 0), data that follows the address
byte controls the MAX5842 (Figure 5). Bits C3-C0 con-
figure the MAX5842 (Table 3). Bits D11-D0 are DAC
data. Input and DAC registers update on the falling
edge of SCL during the acknowledge bit. Should the
write cycle be prematurely aborted, data is not updated
and the write cycle must be repeated. Figure 6 shows
two example write data sequences.
Extended Command Mode
The MAX5842 features an extended command mode
that is accessed by setting C3-C0 = 1 and D11-D8 = 0.
The next data byte writes to the shutdown registers
(Figure 7). Setting bits A, B, C, or D to 1 sets that DAC
SCL
SDA
S
S
r
P
Figure 2. START and STOP Conditions
SCL
SDA
STOP
START
SCL
SDA
ILLEGAL
STOP
START
ILLEGAL EARLY STOP CONDITION
LEGAL STOP CONDITION
Figure 3. Early STOP Conditions
S
A6
A5
A4
A3
A2
A1
A0
R/W
Figure 4. Slave Address Byte Definition
C3
C2
C1
C0
D11
D10
D9
D8
Figure 5. Command Byte Definition
PART
V
ADD
DEVICE ADDRESS
(A6...A0)
MAX5842L
MAX5842L
MAX5842M
MAX5842M
GND
V
DD
GND
V
DD
0111 100
0111 101
1011 100
1011 101
Table 2. MAX5842 I
2
C Slave Addresses
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX5842LEUB | Quad, 12-Bit, Low-Power, 2-Wire, Serial Voltage-Output DAC |
| MAX5858AEVKIT | Evaluation Kit for the MAX5858A/MAX5858/MAX5856A |
| MAX5865EVKIT | Evaluation Kit for the MAX5865 |
| MAX5866 | Ultra-Low-Power. High-Dynamic-Performance. 60Msps Analog Front End |
| MAX5885EVKIT | Evaluation Kit for the MAX5883/MAX5884/MAX5885 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5842EUB | 制造商:Maxim Integrated Products 功能描述:QUAD, 12-BIT, LOW-POWER, 2-WIRE, SERIAL VOLTA - Rail/Tube |
| MAX5842LEUB | 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 |
| MAX5842LEUB+ | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 12-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 |
| MAX5842LEUB+T | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 12-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 |
| MAX5842LEUB-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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