Rainbow Electronics MAX194 - Manual

_______________General Description
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
REF ) or bipolar (-V REF to V REF )
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
Portable Instruments Audio
Industrial Controls Robotics
Multiple Transducer Medical Signal
Measurements Acquisition
Vibrations Analysis Digital Signal
Processing
____________________________Features
♦ True 14-Bit Accuracy: 1 ⁄ 2 LSB INL
82dB SINAD
♦ 9.4µs Conversion Time
♦ 10µA Shutdown Mode
♦ Built-In Track/Hold
♦ AC and DC Specified
♦ Unipolar (0V to V REF ) and Bipolar (-V REF to V REF )
Input Range
♦ Three-State Serial-Data Output
♦ Small 16-Pin DIP, SO, and Ceramic SB Packages
♦ Pin-Compatible 16-Bit Upgrade (MAX195)
______________Ordering Information
MAX194
14-Bit, 85ksps ADC with 10µA Shutdown
________________________________________________________________ Maxim Integrated Products 1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
VDDA
VSSA
AGND
AIN VDDD
SCLK
CLK
BP/UP/SHDN
TOP VIEW
MAX194
REF
VSSD
RESET
CONV CS
EOC
DGND
DOUT
DIP/Wide SO/Ceramic SB
MAX194
AIN
REF
CONV
SCLK
CLK
BP/UP/SHDN
CS
RESET
VSSD
DGND
VDDD
VDDA
AGND
VSSA
DOUT
EOC
SAR
CONTROL LOGIC
COMPARATOR
CALIBRATION
DACs
THREE-STATE BUFFER
4
6
11
16
14
15
5
7
10
8
1
9
3
2
13
12 MAIN DAC Σ
________________Functional Diagram
__________________Pin Configuration
19-0345; Rev 4; 12/97
PART
MAX194ACPE
MAX194BCPE
MAX194ACWE 0°C to +70°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE PIN-PACKAGE
16 Plastic DIP
16 Plastic DIP
16 Wide SO
MAX194BCWE 0°C to +70°C 16 Wide SO
MAX194AEPE -40°C to +85°C 16 Plastic DIP
MAX194BEPE -40°C to +85°C 16 Plastic DIP
MAX194AEWE -40°C to +85°C 16 Wide SO
MAX194BEWE -40°C to +85°C 16 Wide SO
MAX194AMDE -55°C to +125°C 16 Ceramic SB
MAX194BMDE -55°C to +125°C 16 Ceramic SB
EVALUATION KIT
AVAILABLE
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.