MAX194 Maxim, MAX194 Datasheet
MAX194
Manufacturer Part Number
MAX194
Description
14-Bit / 85ksps ADC with 10A Shutdown
Manufacturer
Maxim
Datasheet
1.MAX194.pdf
(24 pages)
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The MAX194 is a 14-bit successive-approximation ana-
log-to-digital converter (ADC) that combines high
speed, high accuracy, low power consumption, and a
10µA shutdown mode. Internal calibration circuitry cor-
rects linearity and offset errors to maintain the full rated
performance over the operating temperature range
without external adjustments. The capacitive-DAC
architecture provides an inherent 85ksps track/hold
function.
The MAX194, with an external reference (up to +5V),
offers a unipolar (0V to V
pin-selectable input range. Separate analog and digital
supplies minimize digital-noise coupling.
The chip select (CS) input controls the three-state seri-
al-data output. The output can be read either during
conversion as the bits are determined, or following con-
version at up to 5Mbps using the serial clock (SCLK).
The end-of-conversion (EOC) output can be used to
interrupt a processor, or can be connected directly to
the convert input (CONV) for continuous, full-speed
conversions.
The MAX194 is available in 16-pin DIP, wide SO, and
ceramic sidebraze packages. The output data format
provides pin-for-pin and functional compatibility with
the 16-bit MAX195 ADC.
________________________Applications
19-0345; Rev 4; 12/97
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.
_______________General Description
__________________Pin Configuration
Portable Instruments
Industrial Controls
Multiple Transducer
Measurements
Vibrations Analysis
TOP VIEW
BP/UP/SHDN
DGND
VDDD
DOUT
SCLK
EOC
CLK
CS
DIP/Wide SO/Ceramic SB
________________________________________________________________ Maxim Integrated Products
14-Bit, 85ksps ADC with 10µA Shutdown
1
2
3
4
5
6
7
8
REF
MAX194
) or bipolar (-V
Audio
Robotics
Medical Signal
Acquisition
Digital Signal
Processing
16
15
14
13
12
11
10
9
VDDA
VSSA
AGND
VSSD
RESET
CONV
AIN
REF
REF
to V
REF
)
____________________________Features
________________Functional Diagram
______________Ordering Information
MAX194ACPE
MAX194BCPE
MAX194ACWE
MAX194BCWE
MAX194AEPE
MAX194BEPE
MAX194AEWE
MAX194BEWE
MAX194AMDE
MAX194BMDE
BP/UP/SHDN
True 14-Bit Accuracy:
9.4µs Conversion Time
10µA Shutdown Mode
Built-In Track/Hold
AC and DC Specified
Unipolar (0V to V
Input Range
Three-State Serial-Data Output
Small 16-Pin DIP, SO, and Ceramic SB Packages
Pin-Compatible 16-Bit Upgrade (MAX195)
PART
RESET
CONV
SCLK
CLK
REF
AIN
CS
13
12
10
2
3
9
1
8
SAR
CONTROL LOGIC
MAIN DAC
-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
TEMP. RANGE
REF
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
CALIBRATION
DACs
) and Bipolar (-V
1
82dB SINAD
⁄
2
LSB INL
THREE-STATE BUFFER
COMPARATOR
MAX194
16 Plastic DIP
16 Plastic DIP
16 Wide SO
16 Wide SO
16 Plastic DIP
16 Plastic DIP
16 Wide SO
16 Wide SO
16 Ceramic SB
16 Ceramic SB
PIN-PACKAGE
REF
4
6
11
16
14
15
5
7
to V
VDDD
DGND
VSSD
VDDA
AGND
VSSA
DOUT
EOC
REF
)
1
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