参数资料
| 型号： | AD5791BRUZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 13/29页 |
| 文件大小： | 0K |
| 描述： | IC DAC 20BIT SRL 20TSSOP |
| 产品变化通告： | AD57x1 Feature Change 27/Jul/2011 |
| 标准包装： | 1 |
| 设置时间： | 1µs |
| 位数： | 20 |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 电压电源： | 双 ± |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-TSSOP |
| 包装： | 管件 |
| 输出数目和类型： | * |
| 采样率（每秒）： | * |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页当前第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页
Data Sheet
AD5791
Rev. D | Page 19 of 28
THEORY OF OPERATION
The AD5791 is a high accuracy, fast settling, single, 20-bit,
serial input, voltage output DAC. It operates from a VDD supply
voltage of 7.5 V to 16.5 V and a VSS supply of 16.5 V to 2.5 V.
Data is written to the AD5791 in a 24-bit word format via a 3-wire
serial interface. The AD5791 incorporates a power-on reset
circuit that ensures the DAC output powers up to 0 V with the
VOUT pin clamped to AGND through a ~6 kΩ internal resistor.
DAC ARCHITECTURE
The architecture of the AD5791 consists of two matched DAC
sections. A simplified circuit diagram is shown in Figure 49.
The six MSBs of the 20-bit data-word are decoded to drive 63
switches, E0 to E62. Each of these switches connects one of 63
matched resistors to either the VREFP or VREFN voltage. The
remaining 14 bits of the data-word drive the S0 to S13 switched
of a 14-bit voltage mode R-2R ladder network. To ensure
performance to specification, the reference inputs must be force
sensed with external amplifiers.
2R
S0
2R
S1
2R
S11
2R
E62
2R
E61
2R
E0
14-BIT R-2R LADDER
.....................
..........
RR
R
2R
VREFPF
VREFPS
VREFNF
VREFNS
VOUT
SIX MSBs DECODED INTO
63 EQUAL SEGMENTS
089
64-
050
Figure 49. DAC Ladder Structure
SERIAL INTERFACE
The AD5791 has a 3-wire serial interface (SYNC, SCLK, and
SDIN) that is compatible with SPI, QSPI, and MICROWIRE
interface standards, as well as most DSPs (see Figure 2 for a
timing diagram).
Input Shift Register
The input shift register is 24 bits wide. Data is loaded into the
device MSB first as a 24-bit word under the control of a serial
clock input, SCLK, which can operate at up to 50 MHz. The
input register consists of a R/W bit, three address bits, and
twenty register bits as shown in Table 7. The timing diagram for
this operation is shown in Figure 2.
Table 7. Input Shift Register Format
MSB
LSB
DB23
DB22
DB21
DB20
DB19
DB0
R/W
Register address
Register data
Table 8. Decoding the Input Shift Register
R/W
Register Address
Description
0
No operation (NOP; used in readback operations
0
1
Write to the DAC register
0
1
0
Write to the control register
0
1
Write to the clearcode register
0
1
0
Write to the software control register
1
0
1
Read from the DAC register
1
0
1
0
Read from the control register
1
0
1
Read from the clearcode register
1 X is don’t care.
相关PDF资料 |
PDF描述 |
|---|---|
| AD5821ABCBZ-REEL | IC DAC 10BIT CURRENTSINK 9WLCSP |
| AD6600ASTZ | IC ADC DUAL W/RSSI 44-LQFP |
| AD6644ASTZ-65 | IC ADC 14BIT 65MSPS CMOS 52-LQFP |
| AD6645ASVZ-105 | IC ADC 14BIT 105MSPS 52TQFP |
| AD6654BBC | IC ADC 14BIT W/6CH RSP 256CSPBGA |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD5791SRU-EP | 功能描述:数模转换器- DAC 20bit 2LSB Unbuffered Ref EP MILA TEMP RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
| AD579JN | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AD579KN | 制造商:AD 制造商全称:Analog Devices 功能描述:VERY FAST, COMPLETE 10- OR 12-BIT A/D CONVERTERS |
| AD579TD | 制造商:AD 制造商全称:Analog Devices 功能描述:VERY FAST, COMPLETE 10- OR 12-BIT A/D CONVERTERS |
| AD579ZJN | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
发布紧急采购，3分钟左右您将得到回复。