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參數(shù)資料
| 型號(hào)： | DAC7615 |
| 元件分類： | 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接口線路驅(qū)動(dòng)器/接收器（單電源RS232C接口線收發(fā)器（2發(fā)2收）） |
| 文件頁數(shù)： | 9/12頁 |
| 文件大?。?/td> | 485K |
| 代理商： | DAC7615 |
9
DAC7615
THEORY OF OPERATION
The DAC7615 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
+5V supply or a dual
±
5V supply. Each device offers a reset
function which immediately 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 Figures
1 and 2 for the basic operation of the DAC7615.
ANALOG OUTPUTS
When V
SS
= –5V (dual supply operation), the output
amplifier can swing to within 2.25V of the supply rails,
over the –40
°
C to +85
°
C temperature range. With V
SS
= 0V
(single-supply operation), the output 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 when V
SS
= 0V.
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 ground), the output amplifier can sink a great deal
more current than it can source. See the Specifications table
for more details concerning short circuit current.
FIGURE 1. Basic Single-Supply Operation of the DAC7615.
FIGURE 2. Basic Dual-Supply Operation of the DAC7615.
NOTE: (1) P and U package pin configurations 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
V
SS
RESETSEL
RESET
LOADREG
LOADDACS
CS
CLK
SDI
GND
Reset DACs
(2)
Update Selected Register
Update All DAC Registers
Chip Select
Clock
Serial Data In
DAC7615
(1)
0.1
μ
F
0.1
μ
F
0V to +2.5V
1
μ
F to 10
μ
F
+5V
+
0V to +2.5V
0V to +2.5V
0V to +2.5V
+2.500V
NOTE: (1) P and U package pin configurations shown. (2) As configured, RESET LOW sets all internal registers
to code 800
H
(0V). If RESETSEL is LOW, RESET LOW sets all internal registers to code 000
H
(–2.5V).
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
V
SS
RESETSEL
RESET
LOADREG
LOADDACS
CS
CLK
SDI
GND
Reset DACs
(2)
Update Selected Register
Update All DAC Registers
Chip Select
Clock
Serial Data In
DAC7615
(1)
0.1
μ
F
0.1
μ
F
–2.5V to +2.5V
1
μ
F to 10
μ
F
+5V
–5V
+
0.1
μ
F
1
μ
F to 10
μ
F
+
–2.5V to +2.5V
–2.500V
0.1
μ
F
+2.500V
–2.5V to +2.5V
–2.5V to +2.5V
+5V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DAC7615E | Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????) |
| DAC7615P | Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????) |
| DAC7615PB | Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????) |
| DAC7615U | Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????) |
| DAC7615UB | Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DAC7615E | 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 |
| DAC7615E | 制造商:Texas Instruments 功能描述:IC 12BIT DAC QUAD 89KHZ 20QSOP |
| DAC7615E | 制造商:Texas Instruments 功能描述:12 BIT VOLTAGE OUTPUT DIGITAL/ANALOG CON |
| DAC7615E/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 |
| DAC7615E/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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