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參數(shù)資料
| 型號(hào)： | AD8802 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 12 Channel, 8-Bit TrimDACs with Power Shutdown |
| 中文描述： | 12通道，8位與電源關(guān)斷TrimDACs |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 432K |
| 代理商： | AD8802 |
AD8802/AD8804
REV. 0
–14–
USER
INPUTS
3
TO 2nd AD8802/4
ARRAY IF NEEDED
TO 2nd TEMP SENSOR
IF NEEDED
4
TO 3rd TEMP SENSOR
IF NEEDED
4
0.1μF
10μF
+5V
+5V
0.1μF
TMP14
2.5 V
REF
SET 1
SET 2
SET 3
SET 4
0.01μF
3
V
CC
OUT
RS
DIS
THR
TRIG
GND
AD8802/4
TLC555
HYS
TRIP 1
TRIP 2
TRIP 3
TRIP 4
V+
GND
SLEEP
O1
O2
O3
O4
05–8
09–12
V
DD
GND
SHDN
CS
CLK
SDI
P2.0
P2.1
P2.2
P2.3
P2.4
80CL51 μC
P1.0/INT2
P0.0
P0.7
P3.2
P3.1
P3.0
P3.3
V
REFH
+5V
Figure 27. Temperature Sensor Array with Programmable Setpoints
The gain of the SSM2018T is controlled by the voltage at Pin 11.
For maximum attenuation of –100 dB a control signal of 3.0 V
typ is necessary. The control signal has a scale of –30 mV/dB
centered around 0 dB gain for 0 V of control voltage, therefore,
for a maximum gain of 40 dB a control voltage of –1.2 volts is
necessary. Now notice that the normal +5 V to GND voltage
range of the AD8802/AD8804 does not cover the 3.0 V to
–1.2 V operational gain control range of the SSM2018T. To
cover the operating gain range fully and not exceed the maxi-
mum specified power supply rating requires the O1 output of
AD8802/AD8804 to be level shifted down. In Figure 28, the
level shifting is accomplished by a Zener diode and 1/4 of an
OP420 quad op amp. For applications that require only
TMP14, and makes the necessary adjustments to the AD8802/
AD8804 before shutting down again. The 80CL51 consumes
only 50
μ
A when operating at 32 kHz, in which case there
would be no need for the TLC555, which consumes 1 mW typ.
12 Channel Programmable Voltage Controlled Amplifier
The SSM2018T is a trimless Voltage Controlled Amplifier
(VCA) for volume control in audio systems. The SSM2018T is
the first professional quality audio VCA in the marketplace that
does not require an external trimming potentiometer to mini-
mize distortion. The TrimDAC shown in Figure 28 is not being
used to trim distortion, but rather to control the gain of the am-
plifier. In this configuration up to twelve SSM2018T can be
digitally controlled. (Please refer to the SSM2018T data sheet
for more specifications and applications information.)
–15V
R
O
150k
+V
50pF
18k
18k
1μF
18k
1μF
+15V
8
1
2
3
4
7
6
5
14
13
12
11
16
15
10
9
SSM2018T
OP420A
1.2V
+15V
50k
OPTIONAL FOR
0 TO 40dB GAIN
V
OUT
O1
V
REFH
O2–
O12
CS
TO 8 MORE CHANNELS
O2
O3
O4–O12
CLK
SDI
3
TO μC
1μF
V
REFL
(ONLY)
OUT
IN
GND
REF195
V+
GND
+15V
AD8802/4
47pF
NC
Figure 28. 12-Channel Programmable Voltage Controlled Amplifier
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD8802AN | 12 Channel, 8-Bit TrimDACs with Power Shutdown |
| AD8802AR | 12 Channel, 8-Bit TrimDACs with Power Shutdown |
| AD8802ARU | 12 Channel, 8-Bit TrimDACs with Power Shutdown |
| AD8804 | 12 Channel, 8-Bit TrimDACs with Power Shutdown(12通道,帶電源關(guān)斷8位D/A轉(zhuǎn)換器) |
| AD8842 | Precision, Quad, SPST Analog Switches |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8802AN | 制造商:Analog Devices 功能描述:DAC 12-CH R-2R 8-bit 20-Pin PDIP N Tube 制造商:Analog Devices 功能描述:SEMICONDUCTORSLINEAR |
| AD8802ANZ | 功能描述:IC DAC 8BIT 12CH W/SD 20DIP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:TrimDAC® 標(biāo)準(zhǔn)包裝:2,400 系列:- 設(shè)置時(shí)間:- 位數(shù):18 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:3 電壓電源:模擬和數(shù)字 功率耗散（最大）:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:36-TFBGA 供應(yīng)商設(shè)備封裝:36-TFBGA 包裝:帶卷 (TR) 輸出數(shù)目和類型:* 采樣率（每秒）:* |
| AD8802AR | 功能描述:IC DAC 8BIT 12CH W/SD 20-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:TrimDAC® 標(biāo)準(zhǔn)包裝:47 系列:- 設(shè)置時(shí)間:2µs 位數(shù):14 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 電壓電源:單電源 功率耗散（最大）:55µW 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:28-SSOP 包裝:管件 輸出數(shù)目和類型:1 電流，單極；1 電流，雙極 采樣率（每秒）:* |
| AD8802AR-REEL | 制造商:Analog Devices 功能描述:DAC 12-CH R-2R 8-bit 20-Pin SOIC W T/R |
| AD8802ARU | 功能描述:IC DAC 8BIT 12CH W/SD 20-TSSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:TrimDAC® 標(biāo)準(zhǔn)包裝:47 系列:- 設(shè)置時(shí)間:2µs 位數(shù):14 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 電壓電源:單電源 功率耗散（最大）:55µW 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:28-SSOP 包裝:管件 輸出數(shù)目和類型:1 電流，單極；1 電流，雙極 采樣率（每秒）:* |
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