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參數(shù)資料
| 型號： | MAX5548ETE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | DAC |
| 英文描述： | Dual, 8-Bit, Programmable, 30mA High-Output-Current DAC |
| 中文描述： | SERIAL INPUT LOADING, 30 us SETTLING TIME, 8-BIT DAC, QCC16 |
| 封裝： | 3 X 3 MM, 0.80 MM HEIGHT, EXPOSED PAD, MO-220WEED-2, QFN-16 |
| 文件頁數(shù)： | 9/15頁 |
| 文件大?。?/td> | 296K |
| 代理商： | MAX5548ETE |
mode) facilitate communication between the MAX5548
and the master. The serial interface remains active
in shutdown.
I
2
C Compatibility (SPI/
I2C
= GND)
The MAX5548 is compatible with existing I
2
C systems
(
Figure 2). SCL and SDA are high-impedance inputs;
SDA has an open-drain output that pulls the data line
low during the ninth clock pulse. SDA and SCL require
pullup resistors (2.4k
or greater) to V
DD
. Optional
resistors (24
) in series with SDA and SCL protect the
device inputs from high-voltage spikes on the bus lines.
Series resistors also minimize crosstalk and undershoot
of the bus signals. The communication protocol sup-
ports standard I
2
C 8-bit communications. The device’s
address is compatible with 7-bit I
2
C addressing proto-
col only. Ten-bit address formats are not supported.
Only write commands are accepted by the MAX5548.
Note:
I
2
C readback is not supported.
Bit Transfer
One data bit transfers during each SCL rising edge.
The MAX5548 requires nine clock cycles to transfer
data into or out of the DAC register. The data on SDA
must remain stable during the high period of the SCL
clock pulse. Changes in SDA while SCL is high are
read as control signals (see the
START and STOP
Conditions
section). Both SDA and SCL idle high.
START and STOP Conditions
The master initiates a transmission with a START condi-
tion (S), (a high-to-low transition on SDA with SCL high).
The master terminates a transmission with a STOP con-
dition (P), (a low-to-high transition on SDA while SCL is
high) (Figure 3). A START condition from the master sig-
nals the beginning of a transmission to the MAX5548.
The master terminates transmission by issuing a STOP
condition. The STOP condition frees the bus.
If a repeated START condition (S
r
) is generated instead
of a STOP condition, the bus remains active.
M
Dual, 8-Bit, Programmable, 30mA
High-Output-Current DAC
_______________________________________________________________________________________
9
+1.25V
REFERENCE
I
FSADJ
R
FSADJ
FSADJ_
OUT_
V
DD
GND
CURRENT-SOURCE
ARRAY DAC
Figure 1. Reference Architecture and Output Current Adjustment
FULL-SCALE OUTPUT CURRENT (mA)*
1.5mA–3mA
2.5mA–5mA
1.500
2.500
1.875
3.125
2.250
3.750
2.625
4.375
3.000
5.000
*
See the command summary in Table 4.
R
FSADJ
(k
)
1mA–2mA
1.00
1.25
1.50
1.75
2.00
4.5mA–9mA
4.500
5.625
6.750
7.875
9.000
8mA–16mA
8.00
10.00
12.00
14.00
16.00
15mA–30mA
15.00
18.75
22.50
26.25
30.00
Calculated
40
35
30
25
20
1% EIA Std.
40.2
34.8
30.1
24.9
20.0
Table 1. Full-Scale Output Current and R
FSADJ_
Selection Based on a +1.25V (typ)
Reference Voltage
DAC CODE
I
OUT
_
1111 1111
1000 0000
0000 0001*
0000 0000
0
Table 2. DAC Output Code Table
255
256
×
I
I
FS
OS
|
|
128
256
×
I
I
FS
OS
|
|
256
I
I
FS
OS
|
|
*
Negative output current values = 0.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5548ETE#G16 | 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 |
| MAX5548ETE#TG16 | 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 |
| MAX5548ETE+ | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 8-Bit 2Ch 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 |
| MAX5548ETE+T | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 8-Bit 2Ch 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 |
| MAX5548ETE-G16 | 制造商:Maxim Integrated Products 功能描述:DUAL, 8-BIT, 30MA HIGH-OUTPUT-CURRENT DAC - Rail/Tube |
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