ZADCS0882 Datasheet, PDF (1/20 Pages) Zentrum Mikroelektronik Dresden AG – 8-Bit, 300ksps, Serial Output ADC Family

Features
· Single Supply Operation:
+ 2.7V … + 5.25V
· Family approach providing
2 / 4 / 8-Channel Single-Ended or
1 / 2 / 4-Channel Differential Inputs
· Up to 300ksps Conversion Rate
· ± 0.25 LSB INL and DNL
· No Missing Codes
· > 49 dB SINAD
· True fully differential Operation
· Software-Configurable Unipolar or
Bipolar output coding
· Internal 3.3MHz oscillator for independent
operation from external clock
· Internal 2.5V Reference
· Low Power
- < 1.2mA (300ksps, 5V supply)
- < 0.5μA (power-down mode)
· SPI^TM / QSPI^TM / MICROWIRE^TM - compatible
4-Wire Serial Interface
· 14 / 16 / 20-Pin SSOP
Applications
· Data Acquisition
· Industrial Process Control
· Portable Data Logging
· Battery-Powered Systems
ZADCS0882/0842/0822
8-Bit, 300ksps, Serial Output ADC Family
Datasheet
Description
The ZADCS08x2 family is a set of low power, 8-bit, suc-
cessive approximation analog-to-digital (A/D) converters
with up to 300ksps conversion rate, two up to eight input
channels, high-bandwidth track/hold and synchronous
serial interface.
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.
The 4-wire serial interface connects directly to SPI™/
(QSPI™ and MICROWIRE™) devices without external
logic.
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.
The ZADCS08x2V versions are equipped with a highly
accurate internal 2.5V reference with an additional external
±1.5% voltage adjustment range.
All members of the ZADCS08x2 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.
Starterkit
available
Functional Block Diagram
Available in
ZADCS0822
Available in
ZADCS0842
Available in
ZADCS0882
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
REFADJ
VREF
8-Channel
Analog
Input IN+
Multiplexer
IN-
DAC with
inherent
T&H
SAR
Comparator
+
-
+ 1.25V
Reference
x 2.000
Internal
3.3 MHz
Oscillator
Serial
Interface
and
Control
State
Machine
nCS
SCLK
DIN
DOUT
SSTRB
nSHDN
VDD
DGND
AGND
Available in ZADCS08x2V 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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