MAX1204 Maxim, MAX1204 Datasheet
MAX1204
Manufacturer Part Number
MAX1204
Description
5v / 8-cHANNEL / sERIAL / 10-bIT adc WITH 3v dIGITAL iNTERFACE
Manufacturer
Maxim
Datasheet
1.MAX1204.pdf
(24 pages)
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The MAX1204 is a 10-bit data-acquisition system
specifically designed for use in applications with mixed
+5V (analog) and +3V (digital) supply voltages. It oper-
ates with a single +5V analog supply or dual ±5V ana-
log supplies, and combines an 8-channel multiplexer,
internal track/hold, and serial interface with high con-
version speed and low power consumption.
A 4-wire serial interface connects directly to
SPI™/Microwire™ devices without external logic, and a
serial strobe output allows direct connection to
TMS320-family digital signal processors. The MAX1204
uses either the internal clock or an external serial-
interface clock to perform successive-approximation
analog-to-digital conversions. The serial interface oper-
ates at up to 2MHz.
The MAX1204 features an internal 4.096V reference and
a reference-buffer amplifier that simplifies gain trim. It
also has a VL pin that supplies power to the digital out-
puts. Output logic levels (3V, 3.3V, or 5V) are determined
by the value of the voltage applied to this pin.
A hard-wired SHDN pin and two software-selectable
power-down modes are provided. Accessing the serial
interface automatically powers up the device. A quick
turn-on time allows the MAX1204 to be shut down
between conversions, enabling the user to optimize
supply currents. By customizing power-down between
conversions, supply current can drop below 10µA at
reduced sampling rates.
The MAX1204 is available in 20-pin SSOP and DIP
packages, and is specified for the commercial, extend-
ed, and military temperature ranges.
________________________Applications
19-1179; Rev 0; 1/97
SPI is a registered trademark of Motorola, Inc.
Microwire is a registered trademark of National Semiconductor Corp.
Typical Operating Circuit appears on last page.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
_______________General Description
5V/3V Mixed-Supply Systems
Data Acquisition
Process Control
Battery-Powered Instruments
Medical Instruments
________________________________________________________________ Maxim Integrated Products
5V, 8-Channel, Serial, 10-Bit ADC
with 3V Digital Interface
____________________________Features
Ordering Information continued at end of data sheet.
MAX1204ACPP
MAX1204BCPP
MAX1204ACAP
MAX1204BCAP
__________________Pin Configuration
______________Ordering Information
8-Channel Single-Ended or 4-Channel
Differential Inputs
Operates from +5V Single or ±5V Dual Supplies
User-Adjustable Output Logic Levels
(2.7V to 5.25V)
Low Power: 1.5mA (operating mode)
Internal Track/Hold, 133kHz Sampling Rate
Internal 4.096V Reference
SPI/Microwire/TMS320-Compatible
4-Wire Serial Interface
Software-Configurable Unipolar/Bipolar Inputs
20-Pin DIP/SSOP
Pin-Compatible 12-Bit Upgrade: MAX1202
TOP VIEW
PART
SHDN
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
V
2µA (power-down mode)
SS
TEMP. RANGE PIN-PACKAGE
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/SSOP
MAX1204
20 Plastic DIP
20 Plastic DIP
20 SSOP
20 SSOP
19
18
17
16
15
14
13
12
11
20
V
SCLK
CS
DIN
SSTRB
DOUT
VL
GND
REFADJ
REF
DD
(LSB)
±1/2
±1
±1/2
±1
INL
1
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