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ZADCS1242

更新时间： 2024-11-25 07:07:39
品牌 Logo 应用领域
ZMD /
页数 文件大小 规格书
21页 578K
描述
12-Bit, 200ksps, Serial Output ADC Family

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ZADCS1242 数据手册

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ZADCS1282/1242/1222  
12-Bit, 200ksps, Serial Output ADC Family  
Datasheet  
Features  
Description  
The ZADCS12x2 family is a set of low power, 12-bit, suc-  
cessive approximation analog-to-digital (A/D) converters  
with up to 200ksps conversion rate, two up to eight input  
channels, high-bandwidth track/hold and synchronous  
serial interface.  
•
Single Supply Operation:  
+ 2.7V … + 5.25V  
•
Family approach providing  
2 / 4 / 8-Channel Single-Ended or  
1 / 2 / 4-Channel Differential Inputs  
The ADCs operate from a single + 2.7V to + 5.25V supply.  
Their analog inputs are software configurable for unipo-  
lar/bipolar and single-ended/differential operation.  
•
•
•
•
•
•
Up to 200ksps Conversion Rate  
± 1 LSB INL and DNL  
The 4-wire serial interface connects directly to SPI™/  
(QSPI™ and MICROWIRE™) devices without external  
logic.  
No Missing Codes  
> 70 dB SINAD  
True fully differential Operation  
All family devices can use either the external serial-  
interface clock or an internal clock to perform successive-  
approximation analog-to-digital conversions. The internal  
clock can be used to run independent conversions on  
more than one device in parallel.  
Software-Configurable Unipolar or  
Bipolar output coding  
•
Internal 3.2MHz oscillator for independent  
operation from external clock  
The ZADCS12x2V versions are equipped with a highly  
accurate internal 2.5V reference with an additional external  
±1.5% voltage adjustment range.  
•
•
Internal 2.5V Reference  
Low Power  
-
-
< 1.2mA (200ksps, 5V supply)  
< 0.5μA (power-down mode)  
All members of the ZADCS12x2 family provide a hard-  
wired shut-down pin (nSHDN) pin and software-selectable  
power-down modes that can be programmed to automati-  
cally shut down the IC at the end of a conversion. Access-  
ing the serial interface automatically powers up the IC. A  
quick turn-on time allows the device to be shut down be-  
tween all conversions.  
•
•
SPITM / QSPITM / MICROWIRETM - compatible  
4-Wire Serial Interface  
14 / 16 / 20-Pin SSOP  
Applications  
•
•
•
•
Data Acquisition  
Industrial Process Control  
Portable Data Logging  
Battery-Powered Systems  
Starterkit  
available  
Functional Block Diagram  
CH0  
CH1  
CH2  
CH3  
CH4  
CH5  
CH6  
CH7  
Available in  
ZADCS1222  
SAR  
8-Channel  
Analog  
Available in  
ZADCS1242  
Comparator  
Input  
IN+  
IN-  
nCS  
+
Serial  
Interface  
and  
Multiplexer  
DAC with  
inherent  
T&H  
SCLK  
DIN  
DOUT  
SSTRB  
Available in  
ZADCS1282  
-
Control  
State  
COM  
nSHDN  
Internal  
3.2 MHz  
Oscillator  
x 2.000  
Machine  
+ 1.25V  
Reference  
VDD  
REFADJ  
VREF  
DGND  
AGND  
Available in ZADCS12x2V versions  
Copyright © 2008, ZMD AG, Rev. 1.1  
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The  
Information furnished in this publication is preliminary and subject to changes without notice.  
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