ZADCS1222AVIS14T
| Model | ZADCS1222AVIS14T |
| Description | ADC, Successive Approximation, 12-Bit, 1 Func, 2 Channel, Serial Access, PDSO14, 5.30 MM, SSOP-14 |
| PDF file | Total 21 pages (File size: 573K) |
| Chip Manufacturer | IDT |
ZADCS1282/1242/1222
12-Bit, 200ksps, Serial Output ADC Family
Datasheet
Features
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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 200ksps Conversion Rate
± 0.5 / ± 1 LSB INL and DNL
No Missing Codes
> 70 dB SINAD
True fully differential Operation
Software-Configurable Unipolar or
Bipolar output coding
Internal 3.2MHz oscillator for independent
operation from external clock
Internal 2.5V Reference
Low Power
-
< 1.2mA (200ksps, 5V supply)
-
< 0.5μA (power-down mode)
SPI
TM
/ QSPI
TM
/ MICROWIRE
TM
- compatible
4-Wire Serial Interface
14 / 16 / 20-Pin SSOP
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.
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 ZADCS12x2V versions are equipped with a highly
accurate internal 2.5V reference with an additional external
±1.5% voltage adjustment range.
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.
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Applications
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Data Acquisition
Industrial Process Control
Portable Data Logging
Battery-Powered Systems
Starterkit
available
Functional Block Diagram
Available in
ZADCS1222
Available in
ZADCS1242
CH0
CH1
CH2
CH3
CH4
Available in
ZADCS1282
CH5
CH6
CH7
COM
8-Channel
Analog
Input
Multiplexer
IN-
IN+
SAR
Comparator
DAC with
inherent
T&H
+
-
Serial
Interface
and
Control
State
Machine
nCS
SCLK
DIN
DOUT
SSTRB
nSHDN
x 2.000
+ 1.25V
Reference
REFADJ
VREF
Available in ZADCS12x2V versions
Internal
3.2 MHz
Oscillator
VDD
DGND
AGND
Copyright © 2008, ZMD AG, Rev. 1.0
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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