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AS1521-BTSU PDF预览

AS1521-BTSU

更新时间： 2024-02-05 12:15:14
品牌 Logo 应用领域
艾迈斯 - AMSCO 转换器
页数 文件大小 规格书
29页 1047K
描述
10-Bit, Single-Supply, Low-Power, 400/300ksps, 8-Channel A/D Converters

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AS1521-BTSU 数据手册

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Data Sheet  
AS1520, AS1521  
10-Bit, Single-Supply, Low-Power, 400/300ksps,  
8-Channel A/D Converters  
1 General Description  
2 Key Features  
ꢀ Single-Supply Operation:  
- +4.5 to +5.5V (AS1520)  
- +2.7 to +3.6V (AS1521)  
The AS1520/AS1521 are low-power, 8/4-channel, 400/  
300ksps, 10-bit analog-to-digital (A/D) converters specif-  
ically designed to operate with single-supply devices.  
Superior AC characteristics, very low power consump-  
tion, and highly-reliable packaging make these ultra-  
small devices perfect for battery-powered remote-sen-  
sor and data-acquisition devices.  
ꢀ Sampling Rate:  
- 400ksps (AS1520)  
- 300ksps (AS1521)  
ꢀ Software-Configurable Analog Input Types:  
The successive-approximation register (SAR), high-  
speed sampling, high-bandwidth track/hold circuitry, and  
multi-mode operation combine to make these devices  
highly-flexible and configurable.  
- 8-Channel Single-Ended  
- 8-Channel Pseudo Differential Referenced to COM  
- 4-Channel Pseudo Differential  
- 4-Channel Fully Differential  
Both devices require low supply current (2.8mA @  
400ksps, AS1520; 2.2mA @ 300ksps, AS1521) and fea-  
ture a reduced-power mode and a power-down mode to  
lower power consumption at slower throughput rates.  
ꢀ Software-Configurable Input Range  
ꢀ Internal +2.5V Reference  
ꢀ Low-Current Operation:  
- 2.8mA @ 400ksps (AS1520)  
- 2.2mA @ 300ksps (AS1521)  
- 0.4mA in Reduced-Power Mode  
- 0.5µA in Full Power-Down Mode  
The devices operate from a single supply (+4.5 to +5.5V,  
AS1520; +2.7 to +3.6V, AS1521). Both devices contain  
an internal 2.5V reference, an integrated reference  
buffer, and feature support for an external reference (1V  
to VDD).  
ꢀ SPI/QSPI/Microwire/TMS320-Compatible  
ꢀ 20-pin TSSOP Package  
Data accesses are made via the high-speed, 4-wire,  
SPI, QSPI-, and Microwire-compatible serial interface.  
The devices are available in a 20-pin TSSOP package.  
3 Applications  
The devices are ideal for remote sensors, data-acquisi-  
tion and data-logging devices, pen-digitizers, process  
control, or any other space-limited A/D application with  
low power-consumption requirements.  
Figure 1. Block Diagram and Pin Assignments  
17  
14  
Output  
Shift  
Register  
CSN  
18  
DOUT  
15  
1
2
20  
19  
18  
17  
16  
15  
14  
13  
12  
11  
CH0  
CH1  
CH2  
CH3  
CH4  
CH5  
CH6  
CH7  
COM  
VDD3  
VDD1  
VDD2  
SCLK  
CSN  
SCLK  
16  
SSTRB  
Input Shift  
Register  
AS1520/  
AS1521  
DIN  
3
10  
VDD3  
4
Control  
Logic  
5
DIN  
AS1520/  
AS1521  
10-Bit  
SAR  
19  
6
1:8  
SSTRB  
DOUT  
VDD2  
Analog  
Input  
Track/  
Hold  
CH0:CH7  
9
IN  
OUT  
REF  
7
20  
8
GND  
COM  
17kΩ  
VDD1  
+1.2V  
REF  
REFADJ  
9
12  
10  
REF  
Av ≈ 2.05  
REFADJ  
11  
13  
+2.50V  
REF  
GND  
www.austriamicrosystems.com  
Revision 1.00  
1 - 29  
1234567...29

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