- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄376564 > DAC8512GBC (ANALOG DEVICES INC) % V, Serial Input Complete 12-Bit DAC PDF資料下載
參數(shù)資料
| 型號： | DAC8512GBC |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | DAC |
| 英文描述： | % V, Serial Input Complete 12-Bit DAC |
| 中文描述： | SERIAL INPUT LOADING, 16 us SETTLING TIME, 12-BIT DAC, UUC8 |
| 封裝： | DIE-8 |
| 文件頁數(shù)： | 15/20頁 |
| 文件大?。?/td> | 757K |
| 代理商： | DAC8512GBC |
DAC8512
–15–
REV. A
A Digitally Controlled, Ultralow Noise VCA
The circuit in Figure 38 illustrates how the DAC8512 can be
used to control an ultralow noise VCA, using the AD600/
AD602. The AD600/AD602 is a dual, low noise, wideband,
variable gain amplifier based on the X-AMP topology.* Both
channels of the AD600 are wired in parallel to achieve a
wideband VCA which exhibits an RTI (Referred To Input)
noise voltage spectral density of approximately 1 nV/
√
Hz
. The
output of the VCA requires an AD844 configured in a gain of 4
to account for signal loss due to input and output 50
termina-
tions. As configured, the total gain in the circuit is 40 dB.
Since the output of the DAC8512 is single quadrant, it was nec-
essary to offset the AD600’s gain control voltage so that the gain
of the circuit is 0 dB for zero scale and 40 dB at full scale. This
was achieved by setting C1LO and C2LO to +625 mV using R1
and R2. Next, the output of the DAC8512 was scaled so that
the gain of the AD600 equaled 20 dB when the digital input
code equaled 800
H
. The frequency response of the VCA as a
function of digital code is shown in Figure 39.
*For more details regarding the AD600 or AD602, please consult the AD600/
AD602 data sheet.
+70
+20
–30
100k
100M
10M
1M
10k
+30
+40
+50
+60
–20
–10
0
+10
FREQUENCY – Hz
S
4095
3072
2048
1024
0
Figure 39. VCA Frequency Response vs. Digital Code
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
REF
AD600JN
V+
V–
0.1
μ
F
0.1
μ
F
6
2
DAC8512FZ
8
7
CS
CLR
1
0.1
μ
F
V+
1
μ
F
2.R6
R7
1k
0
≤
VG
≤
1.25V
5
LD
3
SCLK
4
SDI
R1
619
4.R2
V+
+625mV
6
3
2
0.1
μ
F
0.1
μ
F
V+
V
0.01dB/BIT
10
μ
F
+5V
10
μ
F
–5V
V+
V–
FB = FAIR RITE
SUPPLY DECOUPLING NETWORK
V–
R5
806
R3
402
R4
402
R4
49.9
V
IN
AD844
Figure 38. A Digitally Controlled, Ultralow Noise VCA
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DAC8516 | AES / EBU to Analog Audio Converter |
| DAC8531EVM | DAC8531 Evaluation Module(DAC8531評估板) |
| DAC8532 | Dual Channel, Low Power, 16-Bit, Serial Input DIGITAL-TO-ANALOG CONVERTER |
| DAC8532IDGKR | BASE, BLACK; |
| DAC8532IDGK | Dual Channel, Low Power, 16-Bit, Serial Input DIGITAL-TO-ANALOG CONVERTER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DAC8516 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:AES / EBU to Analog Audio Converter |
| DAC8528 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Converter IC |
| DAC-8528-11-1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:12-Bit Digital-to-Analog Converter |
| DAC-8528-11-1-883B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:12-Bit Digital-to-Analog Converter |
| DAC-8528-11-3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:12-Bit Digital-to-Analog Converter |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。