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參數資料
| 型號： | MAX5174AEEE+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 2/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAC 12BIT LP SERIAL 16-QSOP |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 設置時間： | 18µs |
| 位數： | 12 |
| 數據接口： | 串行 |
| 轉換器數目： | 1 |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SSOP（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 16-QSOP |
| 包裝： | 帶卷 (TR) |
| 輸出數目和類型： | 1 電壓，單極；1 電壓，雙極 |
| 采樣率（每秒）： | * |
MAX5174/MAX5176
Low-Power, Serial, 12-Bit DACs
with Voltage Output
10
______________________________________________________________________________________
Detailed Description
The MAX5174/MAX5176 12-bit, serial, voltage-output
DACs operate with a 3-wire serial interface. These
devices include a 16-bit shift register and a double-
buffered input composed of an input register and a
DAC register (see
Functional Diagram). In addition,
these devices employ a rail-to-rail output amplifier and
internal trimmed resistors to provide a gain of
+1.638V/V, maximizing the output voltage swing. The
MAX5174/MAX5176’s offset adjust pin allows for a DC
shift in DAC outputs. The DACs are designed with an
inverted R-2R ladder network (Figure 1) that produces
a weighted voltage proportional to the reference volt-
age.
Reference Inputs
The reference input accepts both AC and DC values
with a voltage range extending from 0 to VDD - 1.4V.
The following equation represents the resulting output
voltage:
where N is the numeric value of the DAC’s binary input
code (0 to 4095), VREF is the reference voltage, and
Gain is the internally set voltage gain (1.638V/V if OS =
AGND). The maximum output voltage is VDD. The refer-
ence pin has a minimum impedance of 18k
and is
code dependent.
Output Amplifier
With OS connected to AGND, the output amplifier
employs an internal trimmed resistor-divider, setting the
gain to 1.638V/V and minimizing gain error. The output
amplifier has a typical slew rate of 0.6V/s, and settles
to ±0.5LSB from a full-scale transition within 18s when
loaded with 5k
in parallel with 100pF. Loads less than
2k
degrade performance. For alternative output
amplifier setups, refer to the
Applications Information
section.
Shutdown Mode
The MAX5174/MAX5176 feature a software- and hard-
ware-programmable shutdown mode that reduces the
typical supply current to 1A. Enter shutdown by writing
the appropriate input-control word as shown in Table 1
or by using the hardware shutdown. In shutdown mode,
the reference input and amplifier output both become
high impedance, and the serial interface remains
active. Data in the input register is saved, allowing the
MAX5174/MAX5176 to recall the prior output state
when returning to normal operation. Exit shutdown by
reloading the DAC register from the shift register, by
simultaneously loading the input and DAC registers, or
by toggling PDL. When returning from shutdown wait
40s for the output to settle.
Power-Down Lockout
Power-down lockout disables the software/hardware
shutdown mode. A high-to-low transition on PDL brings
the device out of shutdown and returns the output to its
previous state.
Shutdown
Pulling SHDN high while PDL is high places the
MAX5174/MAX5176 in shutdown. Pulling SHDN low will
not return the device to normal operation. A high-to-low
transition on PDL or an appropriate command from the
serial data line (see Table 1 for commands) is required
to exit shutdown.
Serial-Interface
The MAX5174/MAX5176 3-wire serial interface is com-
patible with SPI and QSPI (Figure 2), and MICROWIRE
(Figure 3) interface standards. The 16-bit serial input
word consists of two control bits, 12 bits of data (MSB
to LSB), and two sub-bits.
The control bits determine the MAX5174/MAX5176’s
response as outlined in Table 1. The MAX5174/
MAX5176’s digital inputs are double buffered, which
allows any of the following:
Loading the input register without updating the DAC
register.
Updating the DAC register from the input register.
Updating the input and DAC registers simultaneously.
V
N
Gain
OUT
REF
=
4096
OUT_
OS_
R
SHOWN FOR ALL 1s ON DAC
D0
D9
D10
D11
2R
RR
R
REF_
AGND
Figure 1. Simplified DAC Circuit Diagram
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX5174BEEE | 功能描述:數模轉換器- DAC RoHS:否 制造商:Texas Instruments 轉換器數量:1 DAC 輸出端數量:1 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MAX5174BEEE+ | 功能描述:數模轉換器- DAC 12-Bit Precision DAC RoHS:否 制造商:Texas Instruments 轉換器數量:1 DAC 輸出端數量:1 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MAX5174BEEE+T | 功能描述:數模轉換器- DAC 12-Bit Precision DAC RoHS:否 制造商:Texas Instruments 轉換器數量:1 DAC 輸出端數量:1 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MAX5174BEEE-T | 功能描述:數模轉換器- DAC RoHS:否 制造商:Texas Instruments 轉換器數量:1 DAC 輸出端數量:1 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MAX5175 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Low-Power, Serial, 12-Bit DACs with Force/Sense Voltage Output |
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