MAX186 Maxim, MAX186 Datasheet
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MAX186
Manufacturer Part Number
MAX186
Description
Low-Power / 8-Channel / Serial 12-Bit ADCs
Manufacturer
Maxim
Datasheet
1.MAX186.pdf
(24 pages)
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The MAX186/MAX188 are 12-bit data-acquisition sys-
tems that combine an 8-channel multiplexer, high-band-
width track/hold, and serial interface together with high
conversion speed and ultra-low power consumption.
The devices operate with a single +5V supply or dual
±5V supplies. The analog inputs are software config-
urable for unipolar/bipolar and single-ended/differential
operation.
The 4-wire serial interface directly connects to SPI™,
QSPI™ and Microwire™ devices without external logic. A
serial strobe output allows direct connection to TMS320
family digital signal processors. The MAX186/MAX188
use either the internal clock or an external serial-interface
clock to perform successive-approximation A/D conver-
sions. The serial interface can operate beyond 4MHz
when the internal clock is used.
The MAX186 has an internal 4.096V reference while the
MAX188 requires an external reference. Both parts
have a reference-buffer amplifier that simplifies gain
trim .
The MAX186/MAX188 provide a hard-wired SHDN pin
and two software-selectable power-down modes.
Accessing the serial interface automatically powers up
the devices, and the quick turn-on time allows the
MAX186/MAX188 to be shut down between every
conversion. Using this technique of powering down
between conversions, supply current can be cut to
under 10µA at reduced sampling rates.
The MAX186/MAX188 are available in 20-pin DIP and
SO packages, and in a shrink small-outline package
(SSOP), that occupies 30% less area than an 8-pin DIP.
For applications that call for a parallel interface, see the
MAX180/MAX181 data sheet. For anti-aliasing filters,
consult the MAX274/MAX275 data sheet.
________________________Applications
19-0123; Rev. 4; 8/96
SPI and QSPI are registered trademarks of Motorola.
Microwire is a registered trademark of National Semiconductor.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
_______________General Description
Portable Data Logging
Data-Acquisition
High-Accuracy Process Control
Automatic Testing
Robotics
Battery-Powered Instruments
Medical Instruments
________________________________________________________________ Maxim Integrated Products
Ordering Information continued on last page.
† NOTE: Parts are offered in grades A, B, C and D (grades defined
in Electrical Characteristics). When ordering, please specify grade.
Contact factory for availability of A-grade in SSOP package.
* Dice are specified at +25°C, DC parameters only.
* * Contact factory for availability and processing to MIL-STD-883.
____________________________Features
____________________Pin Configuration
Low-Power, 8-Channel,
______________Ordering Information
MAX186_CPP
MAX186_CWP
MAX186_CAP
MAX186DC/D
MAX186_EPP
MAX186_EWP
MAX186_EAP
MAX186_MJP
8-Channel Single-Ended or 4-Channel
Differential Inputs
Single +5V or ±5V Operation
Low Power: 1.5mA (operating mode)
Internal Track/Hold, 133kHz Sampling Rate
Internal 4.096V Reference (MAX186)
SPI-, QSPI-, Microwire-, TMS320-Compatible
4-Wire Serial Interface
Software-Configurable Unipolar or Bipolar Inputs
20-Pin DIP, SO, SSOP Packages
Evaluation Kit Available
TOP VIEW
PART
†
Serial 12-Bit ADCs
SHDN
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
V
SS
2µA (power-down mode)
10
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
1
2
3
4
5
6
7
8
9
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
DIP/SO/SSOP
MAX186
MAX188
20
19
18
17
16
15
14
13
12
11
PIN-PACKAGE
20 Plastic DIP
20 SO
20 SSOP
Dice*
20 Plastic DIP
20 SO
20 SSOP
20 CERDIP**
DIN
REFADJ
VREF
V
SCLK
CS
SSTRB
DOUT
DGND
AGND
DD
1