Rainbow Electronics MX7576 - Manual

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_______________General Description
Maxim’s MX7575/MX7576 are high-speed (5µs/10µs),
microprocessor (µP) compatible, 8-bit analog-to-digital
converters (ADCs). The MX7575 provides an on-chip
track/hold function that allows full-scale signals up to
50kHz (386mV/µs slew rate) to be acquired and digi-
tized accurately. Both ADCs use a successive-approxi-
mation technique to achieve their fast conversions and
low power dissipation. The MX7575/MX7576 operate
with a +5V supply and a 1.23V external reference. They
accept input voltages ranging from 0V to 2V
REF .
The MX7575/MX7576 are easily interfaced to all popu-
lar 8-bit µPs through standard
CS and RD control sig-
nals. These signals control conversion start and data
access. A
BUSY signal indicates the beginning and
end of a conversion. Since all the data outputs are
latched and three-state buffered, the MX7575/MX7576
can be directly tied to a µP data bus or system l/O port.
Maxim also makes the MAX165 , a plug-in replacement
for the MX7575 with an internal 1.23V reference. For
applications that require a differential analog input and
an internal reference, the
MAX166 is recommended.
________________________Applications
Digital Signal Processing
High-Speed Data Acquisition
Telecommunications
Audio Systems
High-Speed Servo Loops
Low-Power Data Loggers
____________________________Features
♦ Fast Conversion Time: 5µs (MX7575)
10µs (MX7576)
♦ Built-In Track/Hold Function (MX7575)
♦ Low Total Unadjusted Error (±1LSB max)
♦ 50kHz Full-Power Signal Bandwidth (MX7575)
♦ Single +5V Supply Operation
♦ 8-Bit µP Interface
♦ 100ns Data-Access Time
♦ Low Power: 15mW
♦ Small-Footprint Packages
MX7575/MX7576
CMOS, µP-Compatible, 5µs/10µs, 8-Bit ADCs
________________________________________________________________ Maxim Integrated Products 1
DAC
COMP
LATCH AND
THREE-STATE
OUTPUT DRIVERS
SAR
TRACK/
HOLD
CLOCK
OSCILLATOR
CONTROL
LOGIC
AIN
AGND
REF
CLK
CS
RD
V DD
BUSY DGND
TP
16
18
4 9
6
14
D7
..
D0
15
17
5
1
2
3
MX7575
Functional Diagrams continued at end of data sheet.
_______________Functional Diagrams
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
V DD
REF
AIN
AGND
D0 (LSB)
D1
D2
D3
D4
CS
RD
TP (MODE)
BUSY
CLK
D7 (MSB)
D6
D5
DGND
TOP VIEW
10 9
DIP/SO
MX7575
MX7576
( ) ARE FOR MX7576 ONLY.
Pin Configurations continued at end of data sheet.
_________________Pin Configurations
19-0876; Rev 1; 5/96
PART
MX7575 JN
MX7575KN
MX7575JCWN 0°C to +70°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE PIN-PACKAGE
18 Plastic DIP
18 Plastic DIP
18 Wide SO
______________Ordering Information
Ordering Information continued at end of data sheet.
* Contact factory for dice specifications.
** Contact factory for availability.
MX7575KCWN 0°C to +70°C 18 Wide SO
MX7575JP 0°C to +70°C 20 PLCC
MX7575KP 0°C to +70°C 20 PLCC
INL
(LSB)
±1
±1/2
±1
±1/2
±1
±1/2
MX7575J/D 0°C to +70°C Dice* ±1
MX7575AQ -25°C to +85°C 18 CERDIP**
MX7575BQ -25°C to +85°C 18 CERDIP**
±1
±1/2