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參數(shù)資料
| 型號(hào)： | DAC7616EB |
| 元件分類(lèi)： | 外設(shè)及接口 |
| 英文描述： | Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????) |
| 中文描述： | 單電源RS232C接口線(xiàn)路驅(qū)動(dòng)器/接收器（單電源RS232C接口線(xiàn)收發(fā)器（2發(fā)2收）） |
| 文件頁(yè)數(shù)： | 10/13頁(yè) |
| 文件大?。?/td> | 292K |
| 代理商： | DAC7616EB |
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10
DAC7616
SBAS186
THEORY OF OPERATION
The DAC7616 is a quad, serial input, 12-bit, voltage output
DAC. The architecture is a classic R-2R ladder configuration
followed by an operational amplifier that serves as a buffer.
Each DAC has its own R-2R ladder network and output op
amp, but all share the reference voltage inputs. The minimum
voltage output (“zero-scale”) and maximum voltage output
(“full-scale”) are set by external voltage references (V
REFL
and V
REFH
, respectively). The digital input is a 16-bit serial
word that contains the 12-bit DAC code and a 2-bit address
code that selects one of the four DACs (the two remaining
bits are unused). The converter can be powered from a single
+3V supply. Each device offers a reset function which imme-
diately sets all DAC output voltages and internal registers to
either zero-scale (code 000
H
) or mid-scale (code 800
H
). The
reset code is selected by the state of the RESETSEL pin
(LOW = 000
H
, HIGH = 800
H
). See Figure 1 for the basic
operation of the DAC7616.
ANALOG OUTPUTS
The output of the DAC7616 can swing to ground. Note that
the settling time of the output op amp will be longer with
voltages very near ground. Also, care must be taken when
measuring the zero-scale error. If the output amplifier has
a negative offset, the output voltage may not change for the
first few digital input codes (000
H
, 001
H
, 002
H
, etc.) since
the output voltage cannot swing below ground.
The behavior of the output amplifier can be critical in some
applications. Under short-circuit conditions (DAC output
shorted to V
DD
), the output amplifier can sink more current
than it can source. See the Specifications table for more
details concerning short-circuit current.
REFERENCE INPUTS
The minimum output of each DAC is equal to V
REFL
plus a small offset voltage (essentially, the offset of
the output op amp). The maximum output is equal to
V
REFH
– 1LSB plus a similar offset voltage.
The current into the reference inputs depends on the DAC
output voltages and can vary from a few microamps to
approximately 0.4 milliamp. Bypassing the reference volt-
age or voltages with a 0.1
μ
F capacitor placed as close as
possible to the DAC7616 package is strongly recommended.
FIGURE 1. Basic Single-Supply Operation of the DAC7616.
NOTES: (1) U package pin configuration shown. (2) As configured, RESET LOW sets all internal registers
to code 000
H
(0V). If RESETSEL is HIGH, RESET LOW sets all internal registers to code 800
H
(1.25V).
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
DD
V
OUTD
V
OUTC
V
REFL
V
REFH
V
OUTB
V
OUTA
AGND
RESETSEL
RESET
LDAC
NIC
CS
CLK
SDI
GND
Reset DACs
(2)
Update Selected Register
Chip Select
Clock
Serial Data In
DAC7616
(1)
0.1
μ
F
0.1
μ
F
0V to +1.25V
1
μ
F to 10
μ
F
+3V
+
0V to +1.25V
0V to +1.25V
0V to +1.25V
+1.25V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DAC7621 | Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????) |
| DAC7621E | Low Power 5V RS232 Dual Driver/Receiver with 0.1?μF Capacitors; Package: SO; No of Pins: 16; Temperature Range: -40?°C to 85?°C |
| DAC7621EB | Low Power 5V RS232 Dual Driver/Receiver with 0.1?μF Capacitors; Package: SO; No of Pins: 16; Temperature Range: -40?°C to 85?°C |
| DAC7624 | 12-Bit Quad Voltage Output DIGITAL-TO-ANALOG CONVERTER |
| DAC7625 | 30 AMP MINIATURE POWER RELAY |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DAC7616EB/1K | 功能描述:數(shù)模轉(zhuǎn)換器- DAC Quad Ser In 12-Bit Voltage Output 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(lèi)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 |
| DAC7616EB/1KG4 | 功能描述:數(shù)模轉(zhuǎn)換器- DAC Quad Ser In 12-Bit Voltage Output 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(lèi)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 |
| DAC7616EBG4 | 功能描述:數(shù)模轉(zhuǎn)換器- DAC Quad Ser In 12-Bit Voltage Output 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(lèi)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 |
| DAC7616EG4 | 功能描述:數(shù)模轉(zhuǎn)換器- DAC Quad Ser In 12-Bit Voltage Output 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(lèi)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 |
| DAC7616U | 功能描述:數(shù)模轉(zhuǎn)換器- DAC Quad Ser In 12-Bit Voltage Output 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(lèi)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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