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PDF MAX1089 Data sheet ( Hoja de datos )

Número de pieza MAX1089
Descripción 10-Bit 2-Channel Single-Ended and 1-Channel True-Differential ADC
Fabricantes Maxim Integrated 
Logotipo Maxim Integrated Logotipo



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No Preview Available ! MAX1089 Hoja de datos, Descripción, Manual

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.

1 page




MAX1089 pdf
150ksps, 10-Bit, 2-Channel Single-Ended, and
1-Channel True-Differential ADCs in SOT23 and TDFN
Typical Operating Characteristics
(VDD = +3.0V, VREF = +2.5V for MAX1087/MAX1089 or VDD = +5.0V, VREF = +4.096V for MAX1086/MAX1088, 0.1µF capacitor at
REF, fSCLK = 8MHz, (50% Duty Cycle), AIN- = GND for MAX1088/1089, TA = +25°C, unless otherwise noted.)
1.0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
0
INTEGRAL NONLINEARITY
vs. OUTPUT CODE
MAX1087/MAX1089
200 400 600 800 1000 1200
OUTPUT CODE
1.0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
0
INTEGRAL NONLINEARITY
vs. OUTPUT CODE
MAX1086/MAX1088
200 400 600 800 1000 1200
OUTPUT CODE
1.0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
0
DIFFERENTIAL NONLINEARITY
vs. OUTPUT CODE
MAX1087/MAX1089
200 400 600 800 1000 1200
OUTPUT CODE
1.0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
0
DIFFERENTIAL NONLINEARITY
vs. OUTPUT CODE
MAX1086/MAX1088
SUPPLY CURRENT
vs. SAMPLING RATE
1000
MAX1087/MAX1089
100
10
1
200 400 600 800 1000 1200
OUTPUT CODE
0.1
0.001
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
380
330
280
230
180
2.7 3.2 3.7 4.2 4.7 5.2
VDD (V)
1.0 10
SAMPLING RATE (ksps)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
2.7
SUPPLY CURRENT
vs. SAMPLING RATE
1000
MAX1086/MAX1088
100
10
1
0.1
1000 0.001
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
1.0 10
SAMPLING RATE (ksps)
3.2 3.7 4.2 4.7 5.2
VDD (V)
1000
_______________________________________________________________________________________ 5

5 Page





MAX1089 arduino
150ksps, 10-Bit, 2-Channel Single-Ended, and
1-Channel True-Differential ADCs in SOT23 and TDFN
and is available in MSB-first format. Observe the
SCLK to DOUT valid timing characteristic. Clock
data into the µP on SCLK’s rising-edge.
SPI and MICROWIRE Interface
When using SPI interface (Figure 8a) or MICROWIRE
(Figure 8a and 8b), set CPOL = CPHA = 0. Two 8-bit
readings are necessary to obtain the entire 10-bit result
from the ADC. DOUT data transitions on the serial
clock’s falling edge and is clocked into the µP on
SCLK’s rising edge. The first 8-bit data stream contains
the first 8-bits of DOUT starting with the MSB. The sec-
ond 8-bit data stream contains the remaining two result
bits (B1, B0) and two trailing sub-bits (S1, S0). DOUT
then goes high impedance.
QSPI Interface
Using the high-speed QSPI interface (Figure 9a) with
CPOL = 0 and CPHA = 0, the MAX1086–MAX1089
support a maximum fSCLK of 8MHz. One 8- to16-bit
reading is necessary to obtain the entire 10-bit result
from the ADC. DOUT data transitions on the serial
clock’s falling edge and is clocked into the µP on
SCLK’s rising edge. The first 10 bits are the data and
the next two bits are sub-bits (S1, S0). DOUT then
goes high impedance (Figure 9b).
PIC16 and SSP Module and
PIC17 Interface
The MAX1086–MAX1089 are compatible with a
PIC16/PIC17 microcontroller (µC), using the synchro-
nous serial port (SSP) module
To establish SPI communication, connect the controller
as shown in Figure 10a and configure the PIC16/PIC17
as system master. This is done by initializing its syn-
chronous serial port control register (SSPCON) and
synchronous serial port status register (SSPSTAT) to
the bit patterns shown in Tables 1 and 2.
In SPI mode, the PIC16/PIC17 µCs allow eight bits of
data to be synchronously transmitted and received
simultaneously. Two consecutive 8-bit readings (Figure
10b) are necessary to obtain the entire 10-bit result
from the ADC. DOUT data transitions on the serial
clock’s falling edge and is clocked into the µC on
SCLK’s rising edge. The first 8-bit data stream contains
I/O
SCK
MISO
SPI
VDD
SS
CNVST
SCLK
DOUT
MAX1086–
MAX1089
I/O
SK
SI
MICROWIRE
CNVST
SCLK
DOUT
MAX1086–
MAX1089
Figure 8a. SPI Connections
Figure 8b. MICROWIRE Connections
Table 1. Detailed SSPCON Register Content
CONTROL BIT
WCOL
SSPOV
Bit 7
Bit 6
SSPEN Bit 5
CKP
SSPM3
SSPM2
SSPM1
SSPM0
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
X = Don’t care
MAX1086–MAX1089
SETTINGS
SYNCHRONOUS SERIAL PORT CONTROL REGISTER (SSPCON)
X Write Collision Detection Bit
X Receive Overflow Detect Bit
Synchronous Serial Port Enable Bit.
1 0: Disables serial port and configures these pins as I/O port pins.
1: Enables serial port and configures SCK, SDO and SCI pins as serial port pins.
0 Clock Polarity Select Bit. CKP = 0 for SPI master mode selection.
0
0 Synchronous Serial Port Mode Select Bit. Sets SPI master mode and selects
0 fCLK= fOSC / 16.
1
______________________________________________________________________________________ 11

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