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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1080 Datasheet

300ksps/400ksps / Single-Supply / Low-Power / 8-Channel / Serial 10-Bit ADCs with Internal Reference

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MAX1080 pdf
19-1685; Rev 0; 5/00
300ksps/400ksps, Single-Supply, Low-Power,
8-Channel, Serial 10-Bit ADCs with Internal Reference
General Description
The MAX1080/MAX1081 10-bit analog-to-digital convert-
ers (ADCs) combine an 8-channel analog-input multiplex-
er, high-bandwidth track/hold (T/H), and serial interface
with high conversion speed and low power consumption.
The MAX1080 operates from a single +4.5V to +5.5V sup-
ply; the MAX1081 operates from a single +2.7V to +3.6V
supply. Both devices’ analog inputs are software config-
urable for unipolar/bipolar and single-ended/pseudo-dif-
ferential operation.
The 4-wire serial interface connects directly to
SPI™/QSPI™ and MICROWIRE™ devices without external
logic. A serial strobe output allows direct connection to
TMS320-family digital signal processors. The MAX1080/
MAX1081 use an external serial-interface clock to perform
successive-approximation analog-to-digital conversions.
The devices feature an internal +2.5V reference and a ref-
erence-buffer amplifier with a ±1.5% voltage-adjustment
range. An external reference with a 1V to VDD1 range may
also be used.
The MAX1080/MAX1081 provide a hard-wired SHDN pin
and four software-selectable power modes (normal opera-
tion, reduced power (REDP), fast power-down (FASTPD),
and full power-down (FULLPD)). These devices can be
programmed to automatically shut down at the end of a
conversion or to operate with reduced power. When using
the power-down modes, accessing the serial interface
automatically powers up the devices, and the quick turn-
on time allows them to be shut down between all conver-
sions. This technique can cut supply current below 100mA
at lower sampling rates.
The MAX1080/MAX1081 are available in a 20-pin TSSOP
package. These devices are higher-speed versions of the
MAX148/MAX149. For more information, refer to the
respective data sheet.
Applications
Portable Data Logging
Data Acquisition
Medical Instruments
Battery-Powered Instruments
Pen Digitizers
Process Control
Typical Operating Circuit appears at end of data sheet.
Features
o 8-Channel Single-Ended or 4-Channel
Pseudo-Differential Inputs
o Internal Multiplexer and Track/Hold
o Single-Supply Operation
+4.5V to +5.5V (MAX1080)
+2.7V to +3.6V (MAX1081)
o Internal +2.5V Reference
o 400ksps Sampling Rate (MAX1080)
o Low Power: 2.5mA (400ksps)
1.3mA (REDP)
0.9mA (FASTPD)
2µA (FULLPD)
o SPI/QSPI/MICROWIRE/TMS320-Compatible 4-Wire
Serial Interface
o Software-Configurable Unipolar or Bipolar Inputs
o 20-Pin TSSOP Package
Ordering Information
PART
TEMP.
RANGE
PIN-
PACKAGE
INL
(LSB)
MAX1080ACUP 0°C to +70°C 20 TSSOP
±1/2
MAX1080BCUP 0°C to +70°C 20 TSSOP
±1
MAX1080AEUP -40°C to +85°C 20 TSSOP
±1/2
Ordering Information continued at end of data sheet.
Pin Configuration
TOP VIEW
CH0 1
CH1 2
CH2 3
CH3 4
CH4 5
CH5 6
CH6 7
CH7 8
COM 9
SHDN 10
MAX1080
MAX1081
20 VDD1
19 VDD2
18 SCLK
17 CS
16 DIN
15 SSTRB
14 DOUT
13 GND
12 REFADJ
11 REF
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
TSSOP
________________________________________________________________ Maxim Integrated Products 1
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1080 Datasheet

300ksps/400ksps / Single-Supply / Low-Power / 8-Channel / Serial 10-Bit ADCs with Internal Reference

No Preview Available !

MAX1080 pdf
300ksps/400ksps, Single-Supply, Low-Power,
8-Channel, Serial 10-Bit ADCs with Internal Reference
ABSOLUTE MAXIMUM RATINGS
VDD_ to GND .............................................................. -0.3V to 6V
VDD1 to VDD2 ......................................................... -0.3V to 0.3V
CH0–CH7, COM to GND.......................... -0.3V to (VDD1 + 0.3V)
REF, REFADJ to GND .............................. -0.3V to (VDD1 + 0.3V)
Digital Inputs to GND................................................. -0.3V to 6V
Digital Outputs to GND ............................ -0.3V to (VDD2 + 0.3V)
Digital Output Sink Current .................................................25mA
Continuous Power Dissipation (TA = +70°C)
20-Pin TSSOP (derate 7.0mW/°C above +70°C) ........ 559mW
Operating Temperature Ranges
MAX108_ _CUP ................................................. 0°C to +70°C
MAX108_ _EUP............................................... -40°C to +85°C
Storage Temperature Range ............................ -60°C to +150°C
Lead Temperature (soldering, 10s) ................................ +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—MAX1080
(VDD1 = VDD2 = +4.5V to +5.5V, COM = GND, fSCLK = 6.4MHz, 50% duty cycle, 16 clocks/conversion cycle (400ksps), external
+2.5V at REF, REFADJ = VDD1, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
DC ACCURACY (Note 1)
Resolution
10 Bits
Relative Accuracy (Note 2)
MAX1080A
INL
MAX1080B
±0.5
±1.0
LSB
Differential Nonlinearity
DNL No missing codes over temperature
±1.0 LSB
Offset Error
±3.0 LSB
Gain Error (Note 3)
±3.0 LSB
Gain-Error Temperature
Coefficient
±0.8
ppm/°C
Channel-to-Channel Offset-Error
Matching
±0.1
LSB
DYNAMIC SPECIFICATIONS (100kHz sine-wave input, 2.5Vp-p, 400ksps, 6.4MHz clock, bipolar input mode)
Signal-to-Noise plus Distortion
Ratio
Total Harmonic Distortion
Spurious-Free Dynamic Range
Intermodulation Distortion
Channel-to-Channel Crosstalk
(Note 4)
SINAD
THD
SFDR
IMD
Up to the 5th harmonic
fIN1 = 99kHz, fIN2 =102kHz
fIN = 200kHz, VIN = 2.5Vp-p
60 dB
-70 dB
70 dB
76 dB
-78 dB
Full-Power Bandwidth
Full-Linear Bandwidth
CONVERSION RATE
Conversion Time (Note 5)
Track/Hold Acquisition Time
Aperture Delay
Aperture Jitter
Serial Clock Frequency
Duty Cycle
-3dB point
SINAD > 58dB
tCONV
tACQ
fSCLK
6 MHz
350 kHz
2.5 µs
468 ns
10 ns
<50 ps
0.5 6.4 MHz
40 60 %
2 _______________________________________________________________________________________


Part Number MAX1080
Description 300ksps/400ksps / Single-Supply / Low-Power / 8-Channel / Serial 10-Bit ADCs with Internal Reference
Maker Maxim
Total Page 24 Pages
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