参数资料
| 型号： | AD7805BRZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 18/28页 |
| 文件大小： | 0K |
| 描述： | IC DAC 10BIT QUAD PARALL 28-SOIC |
| 产品培训模块： | Data Converter Fundamentals DAC Architectures |
| 标准包装： | 27 |
| 设置时间： | 1.5µs |
| 位数： | 10 |
| 数据接口： | 并联 |
| 转换器数目： | 4 |
| 电压电源： | 模拟和数字 |
| 功率耗散（最大）： | 66mW |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 28-SOIC W |
| 包装： | 管件 |
| 输出数目和类型： | 8 电压，双极 |
| 采样率（每秒）： | 667k |
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AD7804/AD7805/AD7808/AD7809
–25–
REV. A
Dual External Reference Input Capability
It is possible to operate the AD7804/AD7805/AD7808/AD7809
with two externally applied references. Figure 45 shows the
connections for the AD7804. Reference one, the AD589, is
connected to the REFIN pin of the part; the second reference,
the AD780, is used to overdrive the internal VDD/2 reference
which is provided at the COMP pin of the device. With the
circuit shown in Figure 45 it is possible to configure two of the
channels for operation with the AD780 2.5 V reference and the
other two with the AD589 1.23 V reference. The channel con-
trol register allows the user to select the reference for the indi-
vidual channels.
DVDD
0.01 F
0.1 F
10 F
AD589
+5V
0.1 F
AD780
VIN
GND
VO
6.8k
SERIAL
INTERFACE
AD7804
AVDD
VOUTA
VOUTB
VOUTC
VOUTD
AGND
DGND
LDAC
CLR
COMP
FSIN
SDIN
CLKIN
DVDD
REFOUT
REFIN
Figure 45. Two Externally Applied References
+5V
0.01 F
AD7805
AVDD
DVDD
VOUTA
VOUTB
VOUTC
VOUTD
AGND
DGND
LDAC
CLR
COMP
MODE
D9
D0
CS
WR
DVDD
0.1 F
10 F
0.01 F
IN1
VC1
IN2
VC2
IN3
VC3
IN4
VC4
SSM2164
+15V
–15V
–V
VIN3VIN4
500
560pF
30k
500
560pF
VIN2 VIN1
+V
100pF
30k
+15V
–15V
VOUTA
1/2
OP275
500
560pF
500
560pF
30k
100pF
30k
+15V
–15V
VOUTB
1/2
OP275
Figure 44. Low Cost, Two-Channel Mixer
Low Cost, Two-Channel Mixer Using AD7805, SSM2164 and
OP275
The SSM2164 is a quad voltage controlled amplifier (VCA)
with 120 dB of gain control range. Each VCA in the package is
a current in, current out device with a –33 mV/dB voltage con-
trol input port. Figure 44 shows a basic application circuit
which can be used to implement a low cost stereo, two channel
mixer. A 30 k
resistor converts the input voltage to an input
current for the VCA. The 500
resistor and 560 pF capacitor
on the input are added to ensure stable operation of the
SSM2164. The IOUT pin of the SSM2164 should be maintained
at virtual ground and thus the OP275 is operated in its inverting
mode. Its wide bandwidth, high slew rate and low power make it
ideal for a current to voltage converter. A 30 k
feedback resis-
tor is chosen to match the input resistor and thus give unity gain
for a zero volt control voltage input. The 100 pF capacitors
reduce high frequency noise and can be increased to reduce the
low pass cutoff frequency for further noise reduction. The
AD7805 in the circuit is used to control the attenuation of the
VCA, this application circuit only gives attenuation. The voltage
output from the AD7805 provides a low impedance drive to the
SSM2164 so attenuation can be controlled accurately. With a
5 V VDD and a VBIAS of VDD/2 the AD7805 has an LSB size of
approximately 4.5 mV. Therefore, the attenuation can be con-
trolled with a resolution of 0.136 dB/bit and thus 750 codes are
required to provide the full 100 dB of attenuation.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7805BRZ-REEL | 功能描述:IC DAC 10BIT QUAD PARALL 28-SOIC RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 标准包装:47 系列:- 设置时间:2µs 位数:14 数据接口:并联 转换器数目:1 电压电源:单电源 功率耗散（最大）:55µW 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:28-SSOP（0.209"，5.30mm 宽） 供应商设备封装:28-SSOP 包装:管件 输出数目和类型:1 电流，单极；1 电流，双极 采样率（每秒）:* |
| AD7805CN | 制造商:未知厂家 制造商全称:未知厂家 功能描述:10-Bit Digital-to-Analog Converter |
| AD7805CR | 功能描述:IC DAC 10BIT QUAD PARALL 28-SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 产品培训模块:Data Converter Fundamentals DAC Architectures 标准包装:750 系列:- 设置时间:7µs 位数:16 数据接口:并联 转换器数目:1 电压电源:双 ± 功率耗散（最大）:100mW 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-LCC（J 形引线） 供应商设备封装:28-PLCC（11.51x11.51） 包装:带卷 (TR) 输出数目和类型:1 电压，单极；1 电压，双极 采样率（每秒）:143k |
| AD7805CR-REEL | 制造商:Analog Devices 功能描述:DAC 4-CH 10-bit 28-Pin SOIC W T/R 制造商:Analog Devices 功能描述:DAC 4-CH 10-BIT 28SOIC W - Tape and Reel |
| AD7805CR-REEL7 | 制造商:Analog Devices 功能描述:DAC 4-CH 10-bit 28-Pin SOIC W T/R 制造商:Analog Devices 功能描述:DAC 4-CH 10-BIT 28SOIC W - Tape and Reel 制造商:Rochester Electronics LLC 功能描述:QUAD 10-BIT PARALLEL DAC - Tape and Reel |
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