EVALUATION KIT AVAILABLE
MAX186/MAX188
Low-Power, 8-Channel,
Serial 12-Bit ADCs
General Description
____________________________Features
o 8-Channel Single-Ended or 4-Channel
The MAX186/MAX188 are 12-bit data-acquisition sys-
tems that combine an 8-channel multiplexer, high-
bandwidth track/hold, and serial interface together with
high conversion speed and ultra-low power consump-
tion. The devices operate with a single +5V supply or
dual 5V supplies. The analog inputs are software con-
figurable for unipolar/bipolar and single-ended/differen-
tial operation.
Differential Inputs
o Single +5V or 5V Operation
o Low Power: 1.5mA (Operating Mode)
2µA (Power-Down Mode)
o Internal Track/Hold, 133kHz Sampling Rate
o Internal 4.096V Reference (MAX186)
o SPI-/QSPI-/MICROWIRE-/TMS320-Compatible
The 4-wire serial interface directly connects to SPI,
4-Wire Serial Interface
®
QSPI™ and MICROWIRE devices without external
o Software-Configurable Unipolar or Bipolar Inputs
o 20-Pin PDIP, SO, SSOP Packages
o Evaluation Kit Available
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 conversions. The serial interface can
operate beyond 4MHz when the internal clock is used.
Ordering Information
PART†
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
20 PDIP
20 SO
MAX186_CPP+
MAX186_CWP+
MAX186_CAP+
MAX186DC/D
MAX186_EPP+
MAX186_EWP+
MAX186_EAP+
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 .
20 SSOP
Dice*
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 con-
version. Using this technique of powering down
between conversions, supply current can be cut to
under 10µA at reduced sampling rates.
20 PDIP
20 SO
20 SSOP
Ordering Information continued on last page.
†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.
The MAX186/MAX188 are available in 20-pin PDIP and
SO packages, and in a shrink small-outline package
(SSOP), that occupies 30% less area than an 8-pin
PDIP. For applications that call for a parallel interface,
see the MAX180/MAX181 data sheet. For anti-aliasing
filters, consult the MAX274/MAX275 data sheet.
+Denotes a lead(Pb)-free/RoHS-compliant package.
____________________Pin Configuration
TOP VIEW
+
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
1
2
V
DD
20
________________________Applications
Portable Data Logging
19 SCLK
3
CS
18
17
Data-Acquisition
4
DIN
MAX186
MAX188
High-Accuracy Process Control
Automatic Testing
5
16 SSTRB
15 DOUT
6
Robotics
DGND
AGND
7
14
13
12
11
Battery-Powered Instruments
Medical Instruments
8
V
9
REFADJ
VREF
SS
SHDN
10
QSPI is a trademark of Motorola.
MICROWIRE is a registered trademark of National
Semiconductor.
PDIP/SO/SSOP
For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
19-0123; Rev 5; 1/12