MAX195 Datasheet, PDF (1/28 Pages) Maxim Integrated Products – 16-Bit, 85ksps ADC with 10uA Shutdown

19-0377; Rev 1; 12/97
EVAALVUAAILTAIOBNLEKIT
16-Bit, 85ksps ADC with 10µA Shutdown
_______________General Description
The MAX195 is a 16-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 with-
out external adjustments. The capacitive-DAC architec-
ture provides an inherent 85ksps track/hold function.
The MAX195, 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 serial-
data output. The output can be read either during conver-
sion as the bits are determined, or following conversion 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 MAX195 is available in 16-pin DIP, wide SO, and
ceramic sidebraze packages.
________________________Applications
Portable Instruments
Audio
Industrial Controls
Robotics
Multiple Transducer Measurements
Medical Signal Acquisition
Vibrations Analysis
Digital Signal Processing
__________________Pin Configuration
TOP VIEW
BP/UP/SHDN ₁
CLK ₂
SCLK ₃
VDDD ₄
DOUT ₅
DGND 6
EOC ₇
CS ₈
MAX195
16 ^VDDA
15 ^VSSA
14 ^AGND
13 ^AIN
12 REF
11 VSSD
10 RESET
9 CONV
DIP/Wide SO/Ceramic SB
____________________________Features
o 16 Bits, No Missing Codes
o 90dB SINAD
o 9.4µs Conversion Time
o 10µA (max) Shutdown Mode
o Built-In Track/Hold
o AC and DC Specified
o Unipolar (0V to V_REF) and Bipolar (-V_REF to V_REF)
Input Range
o Three-State Serial-Data Output
o Small 16-Pin DIP, SO, and Ceramic SB Packages
______________Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
MAX195BCPE
0°C to +70°C
16 Plastic DIP
MAX195BCWE
0°C to +70°C
16 Wide SO
MAX195ACDE
0°C to +70°C
16 Ceramic SB
MAX195BC/D
0°C to +70°C
Dice*
MAX195BEPE
-40°C to +85°C
16 Plastic DIP
MAX195BEWE -40°C to +85°C
16 Wide SO
MAX195AEDE
-40°C to +85°C
16 Ceramic SB
MAX195AMDE -55°C to +125°C
16 Ceramic SB**
MAX195BMDE -55°C to +125°C
16 Ceramic SB**
* Dice are specified at T_A = +25°C, DC parameters only.
** Contact factory for availability and processing to MIL-STD-883.
________________Functional Diagram
AIN ¹³
REF ¹²
2
CLK
SCLK ³
9
CONV
1
BP/UP/SHDN
8
CS
RESET ¹⁰
MAIN DAC
Σ
CALIBRATION
DACs
COMPARATOR
4
6
VDDD
DGND
11
16
VSSD
VDDA
14 _AGND
15 _VSSA
SAR
CONTROL LOGIC
MAX195
5
THREE-STATE BUFFER
7
DOUT
EOC
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone].
For small orders, phone [phone] ext. 3468.