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Maxim Integrated Semiconductor Electronic Components Datasheet


MAX1087

10-Bit 2-Channel Single-Ended and 1-Channel True-Differential ADC


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MAX1087 pdf
19-2036; Rev 3; 8/10
EVAALVUAAILTAIOBNLEKIT
150ksps, 10-Bit, 2-Channel Single-Ended, and
1-Channel True-Differential ADCs in SOT23 and TDFN
General Description
The MAX1086–MAX1089 are low-cost, micropower, ser-
ial output 10-bit analog-to-digital converters (ADCs)
available in a tiny 8-pin SOT23. The MAX1086/MAX1088
operate with a single +5V supply. The MAX1087/MAX1089
operate with a single +3V supply. The devices feature a
successive-approximation ADC, automatic shutdown,
fast wake-up (1.4µs), and a high-speed 3-wire inter-
face. Power consumption is only 0.5mW (VDD = +2.7V)
at the maximum sampling rate of 150ksps.
AutoShutdown™ (0.1µA) between conversions results in
reduced power consumption at slower throughput rates.
The MAX1086/MAX1087 provide 2-channel, single-
ended operation and accept input signals from 0 to
VREF. The MAX1088/MAX1089 accept true-differential
inputs ranging from 0 to VREF. Data is accessed using
an external clock through the 3-wire SPI™, QSPI™, and
MICROWIRE™-compatible serial interface. Excellent
dynamic performance, low-power, ease of use, and
small package size, make these converters ideal for
portable battery-powered data acquisition applications,
and for other applications that demand low power con-
sumption and minimal space.
Applications
Low Power Data Acquisition
Portable Temperature Monitors
Flowmeters
Touch Screens
AutoShutdown is a trademark of Maxim Integrated Products.
SPI and QSPI are trademarks of Motorola Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
Features
o Single-Supply Operation
+3V (MAX1087/MAX1089)
+5V (MAX1086/MAX1088)
o AutoShutdown Between Conversions
o Low Power
200µA at 150ksps
130µA at 100ksps
65µA at 50ksps
13µA at 10ksps
1.5µA at 1ksps
0.2µA in Shutdown
o True-Differential Track/Hold, 150kHz Sampling Rate
o Software-Configurable Unipolar/Bipolar
Conversion (MAX1088/MAX1089 only)
o SPI, QSPI, MICROWIRE-Compatible Interface for
DSPs and Processors
o Internal Conversion Clock
o 8-Pin SOT23 and 8-Pin TDFN Packages
Ordering Information
PART
TEMP
RANGE
PIN-
PACKAGE
TOP
MARK
MAX1086EKA-T -40°C to +85°C 8 SOT23
AAEZ
MAX1086ETA+T -40°C to +85°C 8 TDFN-EP* AFQ
MAX1087EKA-T -40°C to +85°C 8 SOT23
AAEV
MAX1087ETA+T -40°C to +85°C 8 TDFN-EP* AFM
MAX1088EKA-T -40°C to +85°C 8 SOT23
AAFB
MAX1088ETA+T -40°C to +85°C 8 TDFN-EP*
AFS
MAX1089EKA-T -40°C to +85°C 8 SOT23
AAEX
MAX1089ETA+T -40°C to +85°C 8 TDFN-EP* AFO
*EP = Exposed pad.
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Pin Configurations
TOP VIEW
VDD 1
AIN1 (AIN+) 2
AIN2 (AIN-) 3
GND 4
MAX1086
MAX1087
MAX1088
MAX1089
8 SCLK
7 DOUT
6 CNVST
5 REF
SOT23
( ) ARE FOR THE MAX1088/MAX1089
8765
MAX1086–
MAX1089
+
1 234
TDFN
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.



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MAX1087 pdf
150ksps, 10-Bit, 2-Channel Single-Ended, and
1-Channel True-Differential ADCs in SOT23 and TDFN
ABSOLUTE MAXIMUM RATINGS
VDD to GND .............................................................-0.3V to +6V
CNVST, SCLK, DOUT to GND......................-0.3V to (VDD+0.3V)
REF, AIN1(AIN+), AIN2(AIN-) to GND..........-0.3V to (VDD+0.3V)
Maximum Current Into Any Pin ...........................................50mA
Continuous Power Dissipation (TA = +70°C)
8-Pin SOT23 (derate 9.70mW/°C above TA = +70°C) ......777mW
8-Pin TDFN (derate 18.2mW/°C above TA = +70°C)...1454.5mW
Operating Temperature Ranges.........................-40°C to +85°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow)
SOT23 ..........................................................................+240°C
TDFN ............................................................................+260°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 = +2.7V to +3.6V, VREF = +2.5V for MAX1087/MAX1089, or VDD = +4.75V to +5.25V, VREF = +4.096V for MAX1086/MAX1088,
0.1µF capacitor at REF, fSCLK = 8MHz (50% duty cycle), AIN- = GND for MAX1088/MAX1089. TA = TMIN to TMAX, unless otherwise
noted. Typical values at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
DC ACCURACY (Note 1)
Resolution
10
Relative Accuracy (Note 2)
INL
±1.0
Differential Nonlinearity
DNL No missing codes over temperature
±1.0
Offset Error
±0.5 ±1.0
Gain Error (Note 3)
±1.0 ±2.0
Gain Temperature Coefficient
±0.8
Channel-to-Channel Offset
±0.1
Channel-to-Channel Gain Matching
±0.1
Input Common-Mode Rejection
CMR VCM = 0V to VDD; zero scale input
±0.1
DYNAMIC SPECIFICATIONS: (fIN (sine-wave) = 10kHz, VIN = 4.096Vp-p for MAX1086/MAX1088 or VIN = 2.5VPP
for MAX1087/MAX1089, 150ksps, fSCLK = 8MHz, AIN- = GND for MAX1088/MAX1089)
Signal to Noise Plus Distortion
SINAD
61
UNITS
Bits
LSB
LSB
LSB
LSB
ppm/°C
LSB
LSB
mV
dB
Total Harmonic Distortion
(up to the 5th harmonic)
THD
-70 dB
Spurious-Free Dynamic Range
Full-Power Bandwidth
Full-Linear Bandwidth
CONVERSION RATE
Conversion Time
T/H Acquisition Time
Aperture Delay
Aperture Jitter
Maximum Serial Clock Frequency
Duty Cycle
SFDR
-3dB point
SINAD > 56dB
tCONV
tACQ
fSCLK
70 dB
1 MHz
100 kHz
3.7 µs
1.4 µs
30 ns
<50 ps
8 MHz
30 70 %
2 _______________________________________________________________________________________



Part Number MAX1087
Description 10-Bit 2-Channel Single-Ended and 1-Channel True-Differential ADC
Maker Maxim Integrated - Maxim Integrated
Total Page 15 Pages
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