参数资料
型号: AD5301BRM-REEL7
厂商: Analog Devices Inc
文件页数: 1/24页
文件大小: 0K
描述: IC DAC 8BIT 2WIRE I2C 8-MSOP
产品培训模块: Data Converter Fundamentals
DAC Architectures
产品变化通告: Product Discontinuance 27/Oct/2011
标准包装: 1,000
设置时间: 6µs
位数: 8
数据接口: I²C,串行
转换器数目: 1
电压电源: 单电源
功率耗散(最大): 1.4mW
工作温度: -40°C ~ 105°C
安装类型: 表面贴装
封装/外壳: 8-TSSOP,8-MSOP(0.118",3.00mm 宽)
供应商设备封装: 8-MSOP
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): 167k
2.5 V to 5.5 V, 120 μA, 2-Wire Interface,
Voltage-Output 8-/10-/12-Bit DACs
AD5301/AD5311/AD5321
Rev. B
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rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
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FEATURES
AD5301: buffered voltage output 8-bit DAC
AD5311: buffered voltage output 10-bit DAC
AD5321: buffered voltage output 12-bit DAC
6-lead SOT-23 and 8-lead MSOP packages
Micropower operation: 120 μA @ 3 V
2-wire (I2C-compatible) serial interface
Data readback capability
2.5 V to 5.5 V power supply
Guaranteed monotonic by design over all codes
Power-down to 50 nA @ 3 V
Reference derived from power supply
Power-on reset to 0 V
On-chip rail-to-rail output buffer amplifier
3 power-down functions
APPLICATIONS
Portable battery-powered instruments
Digital gain and offset adjustment
Programmable voltage and current sources
Programmable attenuators
GENERAL DESCRIPTION
The AD5301/AD5311/AD53211 are single 8-/10-/12-bit, buff-
ered, voltage-output DACs that operate from a single 2.5 V to
5.5 V supply, consuming 120 μA at 3 V. The on-chip output
amplifier allows rail-to-rail output swing with a slew rate of
0.7 V/μs. It uses a 2-wire (I2C-compatible) serial interface that
operates at clock rates up to 400 kHz. Multiple devices can share
the same bus.
The reference for the DAC is derived from the power supply
inputs and thus gives the widest dynamic output range. These
parts incorporate a power-on reset circuit, which ensures that
the DAC output powers up to 0 V and remains there until a
valid write takes place. The parts contain a power-down feature
that reduces the current consumption of the device to 50 nA at
3 V and provides software-selectable output loads while in
power-down mode.
The low power consumption in normal operation makes these
DACs ideally suited to portable battery-operated equipment. The
power consumption is 0.75 mW at 5 V and 0.36 mW at 3 V,
reducing to 1 μW in all power-down modes.
1 Protected by U.S. Patent No. 5684481.
FUNCTIONAL BLOCK DIAGRAM
RESISTOR
NETWORK
BUFFER
DAC
REGISTER
POWER-DOWN
LOGIC
AD5301/AD5311/AD5321
VDD
SCL
A0
GND
A1*
REF
POWER-ON
RESET
PD*
SDA
*AVAILABLE ON 8-LEAD VERSION ONLY
INTERFACE
LOGIC
8-/10-/12-BIT
DAC
VOUT
00
92
7-
0
01
Figure 1.
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