MAX192 Maxim, MAX192 Datasheet
MAX192
Manufacturer Part Number
MAX192
Description
Low-Power / 8-Channel / Serial 10-Bit ADC
Manufacturer
Maxim
Datasheet
1.MAX192.pdf
(24 pages)
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________________General Description
The MAX192 is a low-cost, 10-bit data-acquisition system
that combines an 8-channel multiplexer, high-bandwidth
track/hold, and serial interface with high conversion
speed and ultra-low power consumption. The device
operates with a single +5V supply. The analog inputs are
software configurable for single-ended and differential
(unipolar/bipolar) operation.
The 4-wire serial interface connects directly to SPI™,
QSPI™, and Microwire™ devices, without using external
logic. A serial strobe output allows direct connection to
TMS320 family digital signal processors. The MAX192
uses 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. The MAX192 has
an internal 4.096V reference with a drift of ±30ppm typi-
cal. A reference-buffer amplifier simplifies gain trim and
two sub-LSBs reduce quantization errors.
The MAX192 provides a hardwired SHDN pin and two
software-selectable power-down modes. Accessing the
serial interface automatically powers up the device, and
the quick turn-on time allows the MAX192 to be shut
down between conversions. By powering down
between conversions, supply current can be cut to
under 10µA at reduced sampling rates.
The MAX192 is available in 20-pin DIP and SO pack-
ages, and in a shrink-small-outline package (SSOP)
that occupies 30% less area than an 8-pin DIP. The
data format provides hardware and software compati-
bility with the MAX186/MAX188. For anti-aliasing filters,
consult the data sheets for the MAX291–MAX297.
________________________Applications
____________________________Features
19-0247; Rev. 1; 4/97
See last page for Typical Operating Circuit.
SPI and QSPI are trademarks of Motorola Corp.
Microwire is a trademark of National Semiconductor Corp.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
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Management
________________________________________________________________ Maxim Integrated Products
_______________Ordering Information
___________________Pin Configuration
Low-Power, 8-Channel,
MAX192ACPP
MAX192BCPP
MAX192ACWP
MAX192BCWP
MAX192ACAP
MAX192BCAP
MAX192AEPP
MAX192BEPP
MAX192AEWP -40°C to +85°C
MAX192BEWP -40°C to +85°C
MAX192AEAP
MAX192BEAP
MAX192AMJP
MAX192BMJP
8-Channel Single-Ended or 4-Channel Differential
Inputs
Single +5V Operation
Low Power: 1.5mA (operating)
Internal Track/Hold, 133kHz Sampling Rate
Internal 4.096V Reference
4-Wire Serial Interface is Compatible
with SPI, QSPI, Microwire, and TMS320
20-Pin DIP, SO, SSOP Packages
Pin-Compatible 12-Bit Upgrade (MAX186/MAX188)
PART
TOP VIEW
Serial 10-Bit ADC
AGND
SHDN
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
-55°C to +125°C
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
TEMP. RANGE
2µA (power-down)
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
10
1
2
3
4
5
6
7
8
9
DIP/SO/SSOP
MAX192
PIN-PACKAGE
20 Plastic DIP
20 Plastic DIP
20 Wide SO
20 Wide SO
20 SSOP
20 SSOP
20 Plastic DIP
20 Plastic DIP
20 Wide SO
20 Wide SO
20 SSOP
20 SSOP
20 CERDIP
20 CERDIP
20
19
18
17
16
15
14
13
12
11
V
SCLK
CS
DIN
SSTRB
DOUT
DGND
AGND
REFADJ
VREF
DD
INL (LSB)
±1/2
±1
±1/2
±1
±1/2
±1
±1/2
±1
±1/2
±1
±1/2
±1
±1/2
±1
1
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