AD7828TQ Analog Devices, AD7828TQ Datasheet

no-image

AD7828TQ

Manufacturer Part Number
AD7828TQ
Description
Manufacturer
Analog Devices
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD7828TQ
Manufacturer:
a
Quantity:
30
Part Number:
AD7828TQ
Manufacturer:
ADI
Quantity:
1 196
Part Number:
AD7828TQ/883B
Manufacturer:
AD
Quantity:
125
Part Number:
AD7828TQ/883B
Manufacturer:
ADI
Quantity:
1 196
Part Number:
AD7828TQ/883B
Manufacturer:
AD
Quantity:
1
a
GENERAL DESCRIPTION
The AD7824 and AD7828 are high-speed, multichannel, 8-bit
ADCs with a choice of 4 (AD7824) or 8 (AD7828) multiplexed
analog inputs. A half-flash conversion technique gives a fast
conversion rate of 2.5 s per channel and the parts have a built-
in track/hold function capable of digitizing full-scale signals of
10 kHz (157 mV/ s slew rate) on all channels. The AD7824 and
AD7828 operate from a single +5 V supply and have an analog
input range of 0 V to +5 V, using an external +5 V reference.
Microprocessor interfacing of the parts is simple, using standard
Chip Select (CS) and Read (RD) signals to initiate the conver-
sion and read the data from the three-state data outputs. The
half-flash conversion technique means that there is no need to
generate a clock signal for the ADC. The AD7824 and AD7828
can be interfaced easily to most popular microprocessors.
The AD7824 and AD7828 are fabricated in an advanced, all
ion-implanted, Linear-Compatible CMOS process (LC
and have low power dissipation of 40 mW (typ). The AD7824
is available in a 0.3" wide, 24-pin “skinny” DIP, while the
AD7828 is available in a 0.6" wide, 28-pin DIP and in 28-
terminal surface mount packages.
REV. C
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
FEATURES
4- or 8-Analog Input Channels
Built-In Track/Hold Function
10 kHz Signal Handling on Each Channel
Fast Microprocessor Interface
Single +5 V Supply
Low Power: 50 mW
Fast Conversion Rate, 2.5 s/Channel
Tight Error Specification: 1/2 LSB
2
MOS)
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
PRODUCT HIGHLIGHTS
1. 4- or 8-channel input multiplexer gives cost-effective space-
2. Fast conversion rate of 2.5 s/channel features a per channel
3. Built-in track-hold function allows handling of 4- or 8-
4. Tight total unadjusted error spec and channel-to-channel
5. Single +5 V supply simplifies system power requirements.
6. Fast, easy-to-use digital interface allows connection to most
saving multichannel ADC system.
sampling frequency of 100 kHz for the AD7824 or 50 kHz
for the AD7828.
channels up to 10 kHz bandwidth (157 mV/ s slew rate).
matching eliminate the need for user trims.
popular microprocessors with minimal external components.
No clock signal is required for the ADC.
4- & 8-Channel 8-Bit ADCs
FUNCTIONAL BLOCK DIAGRAM
LC
AD7824/AD7828
2
MOS High Speed
© Analog Devices, Inc., 1996
Fax: 617/326-8703

Related parts for AD7828TQ

AD7828TQ Summary of contents

Page 1

... AD7828 is available in a 0.6" wide, 28-pin DIP and in 28- terminal surface mount packages. REV. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. 4- & ...

Page 2

AD7824/AD7828–SPECIFICATIONS noted. All specifications unless otherwise noted. Specifications apply for Mode 0.) MIN MAX Parameter K Version ACCURACY Resolution 8 2 Total Unadjusted Error 1 Minimum Resolution for which No Missing Codes Are Guaranteed 8 Channel-to-Channel Mismatch ...

Page 3

TIMING CHARACTERISTICS Limit at Limit at + Parameter (All Grades) ( Grades CSS CSH RDY t 2.0 ...

Page 4

... AD7824UQ* AD7828KN AD7828LN AD7828KP AD7828LP AD7828BQ AD7828CQ AD7828BR AD7828BRS AD7828TQ* AD7828UQ* AD7828TE* AD7828UE* *Available to /883B processing only. Contact our local sales office for military data sheet. For U.S. Standard Military Drawing (SMD) see DESC Drawing #5692-88764. –4– WARNING! ESD SENSITIVE DEVICE ...

Page 5

Conversion Time vs. Temperature Accuracy vs REF REF REF Signal-Noise Ratio vs. Input Frequency REV. C Typical Performance Characteristics–AD7824/AD7828 Power Supply Current vs. Temperature (Not Including Reference Ladder) (+) – V (–)] REF –5– Accuracy vs. ...

Page 6

AD7824/AD7828 OPERATIONAL DIAGRAM The AD7824 is a 4-channel 8-bit A/D converter and the AD7828 is an 8-channel 8-bit A/D converter. Operational dia- grams for both of these devices are shown in Figures 3 and 4. The addition of just a ...

Page 7

INPUT CURRENT Due to the novel conversion techniques employed by the AD7824/ AD7828, the analog input behaves somewhat differently than in conventional devices. The ADC’s sampled-data comparators take varying amounts of input current depending on which cycle the conversion is ...

Page 8

AD7824/AD7828 UNIPOLAR OPERATION The analog input range for any channel of the AD7824/ AD7828 shown in the unipolar operational diagram of Fig- ure 10. Figure 11 shows the designed code transitions which occur ...

Page 9

MODE 0 Figure 14 shows the timing diagram for Mode 0 operation. This mode can only be used for microprocessors which have a WAIT state facility, whereby a READ instruction cycle can be ex- tended to accommodate slow memory devices. ...

Page 10

AD7824/AD7828 MICROPROCESSOR INTERFACING The AD7824/AD7828 is designed to interface to microproces- sors as Read Only Memory (ROM). Analog channel selection, conversion start and data read operations are controlled by CS, RD and the channel address inputs. These signals are common ...

Page 11

Figure 19. Speech Analysis Using Real-Time Filtering Figure 20. 4-Channel Fast Infinite Sample-and-Hold REV. C AD7824/AD7828 –11– ...

Page 12

... AD7824/AD7828 24-Pin Plastic DIP (N-24) 24-Pin Cerdip (Q-24) 24-Pin Ceramic DIP (D-24A) 28-Terminal PLCC (P-28A) NOTE 1 Analog Devices reserves the right to ship either cerdip (Q-24, Q-28) or ceramic ( D-24A, D-28) hermetic packages. OUTLINE DIMENSIONS Dimensions shown in inches and (mm –12– 28-Pin Plastic DIP (N-28) 1 28-Pin Cerdip (Q-28) 1 28-Pin Ceramic DIP (D-28) 28-Terminal LCCC (E-28A) REV ...

Related keywords