MAX1204_12 Datasheet, PDF (1/23 Pages) Maxim Integrated Products – 5V, 8-Channel, Serial, 10-Bit ADC with 3V Digital Interface

MAX1204
5V, 8-Channel, Serial, 10-Bit ADC
with 3V Digital Interface
_______________General Description
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-inter-
face clock to perform successive-approximation ana-
log-to-digital conversions. The serial interface operates
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 V_L 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 PDIP
packages, and is specified for the commercial and
extended temperature ranges.
________________________Applications
____________________________Features
o 8-Channel Single-Ended or 4-Channel Differential
Inputs
o Operates from +5V Single or ±5V Dual Supplies
o User-Adjustable Output Logic Levels (2.7V to
5.25V)
o Low Power: 1.5mA (Operating Mode)
2µA (Power-Down Mode)
o Internal Track/Hold, 133kHz Sampling Rate
o Internal 4.096V Reference
o SPI/MICROWIRE/TMS320-Compatible 4-Wire
Serial Interface
o Software-Configurable Unipolar/Bipolar Inputs
o 20-Pin PDIP/SSOP
o Pin-Compatible 12-Bit Upgrade: MAX1202
______________Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
TOP
MARK
MAX1204ACPP+ 0°C to +70°C 20 PDIP
MAX1204BCPP+ 0°C to +70°C 20 PDIP
MAX1204ACAP+ 0°C to +70°C 20 SSOP
MAX1204BCAP+ 0°C to +70°C 20 SSOP
Ordering Information continued at end of data sheet.
+Denotes a lead(Pb)-free/RoHS-compliant package.
±1/2
±1
±1/2
±1
__________________Pin Configuration
5V/3V Mixed-Supply Systems
Data Acquisition
Process Control
Battery-Powered Instruments
Medical Instruments
TOP VIEW
CH0 1
CH1 2
CH2 3
CH3 4
+
MAX1204
20 V_DD
19 SCLK
18 CS
17 DIN
CH4 5
16 SSTRB
CH5 6
15 DOUT
CH6 7
CH7 8
14 VL
13 GND
V_SS 9
SHDN 10
12 REFADJ
11 REF
Typical Operating Circuit appears on last page.
MICROWIRE is a registered trademark of National Semiconductor Corp.
PDIP/SSOP
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-1179; Rev 1; 1/12