参数资料
| 型号： | AD5231BRU10 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 17/28页 |
| 文件大小： | 0K |
| 描述： | IC DGTL POT 1024POS 10K 16TSSOP |
| 标准包装： | 96 |
| 接片： | 1024 |
| 电阻（欧姆）： | 10k |
| 电路数： | 1 |
| 温度系数： | 标准值 600 ppm/°C |
| 存储器类型： | 非易失 |
| 接口： | 4 线 SPI（芯片选择） |
| 电源电压： | 2.7 V ~ 5.5 V，±2.25 V ~ 2.75 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 16-TSSOP |
| 包装： | 管件 |
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AD5231
Data Sheet
Rev. D | Page 24 of 28
V+
V–
AD8552
AD5231
VO
V+
V–
AD8552
–2.5VREF
B
A
W
A1
U1
+2.5VREF
VOUT
VIN
TRIM
GND
ADR421
+5V
–5V
+5V
R
A2
+5V
02739-
048
Figure 49. 10-Bit Bipolar DAC
10-BIT UNIPOLAR DAC
Figure 50 shows a unipolar 10-bit DAC using AD5231. The
buffer is needed to drive various leads.
AD5231
V+
V–
AD8601
W
A1
GND
AD1582
5V
U1
3
A
B
VO
1
2
VOUT
VIN
02739-
049
Figure 50. 10-Bit Unipolar DAC
PROGRAMMABLE VOLTAGE SOURCE WITH
BOOSTED OUTPUT
For applications that require high current adjustment, such as a
laser diode driver or tunable laser, a boosted voltage source can
be considered (see Figure 51).
AD5231
V+
V–
W
AD8601
A
B
VIN
VOUT
IL
2N7002
RBIAS
SIGNAL CC
LD
U2
02739-
058
Figure 51. Programmable Booster Voltage Source
In this circuit, the inverting input of the op amp forces the VOUT
to be equal to the wiper voltage set by the digital potentiometer.
The load current is then delivered by the supply via the
N-Ch FET N1. N1 power handling must be adequate to dissipate
(Vi VO) × IL power. This circuit can source a maximum of
100 mA with a 5 V supply.
For precision applications, a voltage reference such as ADR421,
ADR03, or ADR370 can be applied at Terminal A of the digital
potentiometer.
PROGRAMMABLE CURRENT SOURCE
A programmable current source can be implemented with the
circuit shown in Figure 52.
V+
V–
OP1177
U2
VIN
SLEEP
REF191
GND
VOUT
3
2
4
6
U1
AD5231
W
A
B
VL
IL
+5V
–5V
+5V
+
–
–2.048V TO VL
0V TO (2.048V + VL)
RS
102
C1
1F
RL
100
02739-
051
Figure 52. Programmable Current Source
REF191 is a unique low supply, headroom precision reference
that can deliver the 20 mA needed at 2.048 V. The load current
is simply the voltage across Terminals B–W of the digital
potentiometer divided by RS:
1024
×
=
S
REF
L
R
D
V
I
(7)
The circuit is simple, but be aware that there are two issues.
First, dual-supply op amps are ideal because the ground
potential of REF191 can swing from 2.048 V at zero scale to VL
at full scale of the potentiometer setting. Although the circuit
works under single-supply, the programmable resolution of the
system is reduced. Second, the voltage compliance at VL is
limited to 2.5 V or equivalently a 125 load. Should higher
voltage compliance be needed, users can consider digital
shows an alternate circuit for high voltage compliance.
To achieve higher current, such as when driving a high power
LED, the user can replace the UI with an LDO, reduce RS, and
add a resistor in series with the digital potentiometer’s
A terminal. This limits the potentiometer’s current and
increases the current adjustment resolution.
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相关代理商/技术参数 |
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| AD5231BRU100 | 功能描述:IC DGTL POT 1024POS 16-TSSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:- 标准包装:3,000 系列:DPP 接片:32 电阻（欧姆）:10k 电路数:1 温度系数:标准值 300 ppm/°C 存储器类型:非易失 接口:3 线串行（芯片选择，递增，增/减） 电源电压:2.5 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WFDFN 裸露焊盘 供应商设备封装:8-TDFN（2x3） 包装:带卷 (TR) |
| AD5231BRU100-REEL7 | 制造商:Analog Devices 功能描述:Digital Potentiometer 1024POS 100KOhm Single 16-Pin TSSOP T/R 制造商:Analog Devices 功能描述:DGTL POTENTIOMETER 1024POS 100KOHM SGL 16TSSOP - Tape and Reel 制造商:Rochester Electronics LLC 功能描述:10-BIT EEMEM DIGITAL POT - Tape and Reel |
| AD5231BRU10-REEL7 | 功能描述:IC DGTL POT 1024POS 16-TSSOP TR RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:- 标准包装:3,000 系列:DPP 接片:32 电阻（欧姆）:10k 电路数:1 温度系数:标准值 300 ppm/°C 存储器类型:非易失 接口:3 线串行（芯片选择，递增，增/减） 电源电压:2.5 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WFDFN 裸露焊盘 供应商设备封装:8-TDFN（2x3） 包装:带卷 (TR) |
| AD5231BRU50 | 功能描述:IC DGTL POT 1024POS 16-TSSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:- 标准包装:2,500 系列:XDCP™ 接片:256 电阻（欧姆）:100k 电路数:1 温度系数:标准值 ±300 ppm/°C 存储器类型:非易失 接口:I²C（设备位址） 电源电压:2.7 V ~ 5.5 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:带卷 (TR) |
| AD5231BRU50-REEL7 | 功能描述:IC DGTL POT 1024POS 16-TSSOP TR RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:- 标准包装:2,500 系列:XDCP™ 接片:256 电阻（欧姆）:100k 电路数:1 温度系数:标准值 ±300 ppm/°C 存储器类型:非易失 接口:I²C（设备位址） 电源电压:2.7 V ~ 5.5 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:带卷 (TR) |
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