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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX189 Datasheet

1.4MHz SOT23 Current-Mode Step-Up DC-DC Converter

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MAX189 pdf
19-0196; Rev 0; 10/93
EVFAOLLULAOTWIOSNDKAITTAMSAHNEUEATL
+5V, Low-Power, 12-Bit Serial ADCs
__________________General Description
The MAX187/MAX189 serial 12-bit analog-to-digital
converters (ADCs) operate from a single +5V supply
and accept a 0V to 5V analog input. Both parts feature
an 8.5µs successive-approximation ADC, a fast
track/hold (1.5µs), an on-chip clock, and a high-speed
3-wire serial interface.
The MAX187/MAX189 digitize signals at a 75ksps
throughput rate. An external clock accesses data from
the interface, which communicates without external
hardware to most digital signal processors and micro-
controllers. The interface is compatible with SPI™,
QSPI™, and Microwire™.
The MAX187 has an on-chip buffered reference, and
the MAX189 requires an external reference. Both the
MAX187 and MAX189 save space with 8-pin DIP and
16-pin SO packages. Power consumption is 7.5mW
and reduces to only 10µW in shutdown.
Excellent AC characteristics and very low power con-
sumption combined with ease of use and small pack-
age size make these converters ideal for remote DSP
and sensor applications, or for circuits where power
consumption and space are crucial.
___________________________Applications
Portable Data Logging
Remote Digital Signal Processing
Isolated Data Acquisition
High-Accuracy Process Control
________________Functional Diagram
________________________________Features
o 12-Bit Resolution
o ±12 LSB Integral Nonlinearity (MAX187A/MAX189A)
o Internal Track/Hold, 75kHz Sampling Rate
o Single +5V Operation
o Low Power: 2µA Shutdown Current
1.5mA Operating Current
o Internal 4.096V Buffered Reference (MAX187)
o 3-Wire Serial Interface, Compatible with SPI,
QSPI, and Microwire
o Small-Footprint 8-Pin DIP and 16-Pin SO
_________________Ordering Information
PART
MAX187ACPA
MAX187BCPA
MAX187CCPA
MAX187ACWE
MAX187BCWE
MAX187CCWE
MAX187BC/D
TEMP. RANGE
PIN-PACKAGE
ERROR
(LSB)
0°C to +70°C 8 Plastic DIP ±12
0°C to +70°C 8 Plastic DIP ±1
0°C to +70°C
0°C to +70°C
8 Plastic DIP
16 Wide SO
±2
±12
0°C to +70°C 16 Wide SO
±1
0°C to +70°C 16 Wide SO
±2
0°C to +70°C Dice*
±1
Ordering Information continued on last page.
* Dice are specified at TA = +25°C, DC parameters only.
** Contact factory for availability and processing to MIL-STD-883.
_________________Pin Configurations
5
GND
REF 4
2
AIN
1
VDD
+2.5V
BANDGAP
REF-
AV = 1.638
DAC
10k (4.096V)
REF+
REFERENCE
(MAX187 ONLY)
OUTPUT
SHIFT
REGISTER
12-BIT
SAR
T/H
MAX187
MAX189
COMPARATOR
BUFFER ENABLE/DISABLE CONTROL
AND
TIMING
6
DOUT
8
SCLK
7
CS
3
SHDN
NOTE: PIN NUMBERS SHOWN ARE FOR 8-PIN DIPs ONLY.
TOP VIEW
VDD 1
AIN 2
SHDN 3
REF 4
MAX187
MAX189
8 SCLK
7 CS
6 DOUT
5 GND
DIP
Pin Configurations continued on last page.
™ SPI and QSPI are trademarks of Motorola. Microwire is a trademark of National Semiconductor.
________________________________________________________________ Maxim Integrated Products 1
Call toll free 1-800-998-8800 for free samples or literature.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX189 Datasheet

1.4MHz SOT23 Current-Mode Step-Up DC-DC Converter

No Preview Available !

MAX189 pdf
+5V, Low-Power, 12-Bit Serial ADCs
ABSOLUTE MAXIMUM RATINGS
VDD to GND .............................................................-0.3V to +6V
AIN to GND................................................-0.3V to (VDD + 0.3V)
REF to GND ...............................................-0.3V to (VDD + 0.3V)
Digital Inputs to GND.................................-0.3V to (VDD + 0.3V)
Digital Outputs to GND..............................-0.3V to (VDD + 0.3V)
SHDN to GND.............................................-0.3V to (VDD + 0.3V)
REF Load Current (MAX187) .........................4.0mA Continuous
REF Short-Circuit Duration (MAX187)................................20sec
DOUT Current ..................................................................±20mA
Continuous Power Dissipation (TA = +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ..500mW
16-Pin Wide SO (derate 8.70mW/°C above +70°C) ...478mW
8-Pin CERDIP (derate 8.00mW/°C above +70°C) ......440mW
Operating Temperature Ranges:
MAX187_C_ _/MAX189_C_ _.............................0°C to +70°C
MAX187_E_ _/MAX189_E_ _ ..........................-40°C to +85°C
MAX187_MJA/MAX189_MJA .......................-55°C to +125°C
Storage Temperature Range............................-60°C to +150°C
Lead Temperature (soldering, 10sec) ............................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VDD = +5V ±5%; GND = 0V; unipolar input mode; 75ksps, fCLK = 4.0MHz, external clock (50% duty cycle); MAX187—internal
reference: VREF = 4.096V, 4.7µF capacitor at REF pin, or MAX189—external reference: VREF = 4.096V applied to REF pin, 4.7µF
capacitor at REF pin; TA = TMIN to TMAX; unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
DC ACCURACY (Note 1)
Resolution
MAX18_A
12 Bits
±12
Relative Accuracy (Note 2)
MAX18_B
±1 LSB
MAX18_C
±2
Differential Nonlinearity
Offset Error
DNL
No missing codes over temperature
MAX18_A
MAX18_B/C
±1
±112
±3
LSB
LSB
MAX187
±3
Gain Error (Note 3)
MAX189A
±1 LSB
MAX189B/C
±3
Gain Temperature Coefficient
External reference, 4.096V
±0.8
ppm/°C
DYNAMIC SPECIFICATIONS (10kHz sine wave input, 0V to 4.096Vp-p, 75ksps)
Signal-to-Noise plus
Distortion Ratio
SINAD
70 dB
Total Harmonic Distortion
(up to the 5th harmonic)
THD
-80 dB
Spurious-Free Dynamic Range SFDR
80 dB
Small-Signal Bandwidth
Rolloff -3dB
4.5 MHz
Full-Power Bandwidth
0.8 MHz
2 _______________________________________________________________________________________


Part Number MAX189
Description 1.4MHz SOT23 Current-Mode Step-Up DC-DC Converter
Maker Maxim
Total Page 20 Pages
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