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PDF MAX1102 Data sheet ( Hoja de datos )

Número de pieza MAX1102
Descripción 8-Bit CODECs
Fabricantes Maxim Integrated 
Logotipo Maxim Integrated Logotipo



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No Preview Available ! MAX1102 Hoja de datos, Descripción, Manual

19-1873; Rev 1; 1/11
8-Bit CODECs
General Description
The MAX1102/MAX1103/MAX1104 CODECs provide
both an 8-bit analog-to-digital converter (ADC) and an
8-bit digital-to-analog converter (DAC) with a 4-wire
logic interface. The MAX1102/MAX1103 include an
onboard +2V/+4V reference, providing a well-regulat-
ed, low noise reference for both the ADC and DAC.
The MAX1104 offers ratiometric conversion, with the
reference internally connected to VDD.
The MAX1102/MAX1103/MAX1104 are low-cost, low-
power CODECs for use with microcontrollers (µCs).
They allow for greater flexibility when selecting a µC.
Less expensive µCs without onboard converters can be
used while maintaining overall system performance.
The MAX1102 operates from a single +2.7V to +3.6V
supply, the MAX1103 operates from a +4.5V to +5.5V
supply, and the MAX1104 operates from a +2.7V to
+5.5V supply. The MAX1102/MAX1103 incorporate a
VDD monitor in addition to AIN for power supply moni-
toring. All devices feature a low 18µA standby mode,
where both data converters are disabled while the ref-
erence remains active, and three shutdown modes:
ADC disabled, DAC disabled, and complete shutdown
(1µA). A quick 10µs wake-up time allows the
MAX1102/MAX1103/MAX1104 to cycle in and out of
shutdown even during short-duration idle times.
The MAX1102/MAX1103/MAX1104 are available in a
space-saving 8-pin µMAX® package.
________________________Applications
Analog I/O for Microcontrollers
Analog System Signal Supervision
Voice Recording and Playback
Functional Diagram
VDD
MAX1102
VDD/2
CS
SCLK
SERIAL
INTERFACE
AND
MAX1103
MAX1104
VOLTAGE
REFERENCE
ADC
T/H
AIN
DIN
DOUT
CONTROL
LOGIC
DAC
LATCH
DAC
AOUT
GND
µMAX is a registered trademark of Maxim Integrated Products, Inc.
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp
Features
o 8-Bit ADC
±1LSB INL
Built-In Track-and-Hold
48dB of SINAD
o 8-Bit DAC
±1LSB INL
55dB of SFDR
o Internal Conversion Clock
o Single-Supply Operation
+2.7V to +3.6V (MAX1102)
+4.5V to +5.5V (MAX1103)
+2.7V to +5.5V (MAX1104)
o Low Power Consumption
0.5mA at 25ksps
1µA Shutdown Mode
o 6MHz 4-Wire SPI™, QSPI™, and MICROWIRE™
Compatible Interface
o Compact 8-Pin µMAX Package
o Internal Voltage Reference
+2V: MAX1102
+4V: MAX1103
o Power-Supply Monitor (MAX1102/MAX1103)
o Rail-to-rail DAC Output Buffer
Ordering Information
PART
TEMP
RANGE
PIN- REFERENCE
PACKAGE
MAX1102EUA+ -40°C to +85°C 8 µMAX
+2V
MAX1103EUA+ -40°C to +85°C 8 µMAX
+4V
MAX1104EUA+ -40°C to +85°C 8 µMAX
VDD
+Denotes a lead(Pb)-free/RoHS-compliant package.
Pin Configuration
TOP VIEW
+
VDD 1
GND 2
AIN 3
OUT 4
MAX1102
MAX1103
MAX1104
µMAX
8 DIN
7 DOUT
6 SCLK
5 CS
________________________________________________________________ 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




MAX1102 pdf
8-Bit CODECs
Typical Operating Characteristics
(VDD = +3.0V (MAX1102), VDD = +5V (MAX1103), fSCLK = 6.0MHz (50% duty cycle), ROUT = 10k, COUT = 100pF, TA = +25°C,
unless otherwise noted.)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(ADC ENABLED, DAC DISABLED)
300
CODE = AAhex
250
200
150
100
50
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
SHUTDOWN SUPPLY CURRENT vs.
SUPPLY VOLTAGE
20
15 ADC and DAC OFF
REFERENCE ON
10
5
ADC, DAC, and
REFERENCE OFF
0
2.5 3.0 3.5 4.0 4.5 5.0
SUPPLY VOLTAGE (V)
ADC GAIN ERROR
vs. SUPPLY VOLTAGE
2.00
VREF = 2.0V
1.75 CODE = FFhex
1.50
1.25
1.00
0.75
0.50
0.25
0
2.5 3.0 3.5 4.0 4.5 5.0
SUPPLY VOLTAGE (V)
5.5
5.5
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(DAC ENABLED, ADC DISABLED)
350
CODE = FFhex
300
250
200
CODE = 00hex
150
100
50
0
2.5
3.0 3.5 4.0 4.5 5.0
SUPPLY VOLTAGE (V)
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
2.5
ADC OFFSET ERROR vs.
SUPPLY VOLTAGE
3.0 3.5 4.0 4.5 5.0
SUPPLY VOLTAGE (V)
5.5
ADC GAIN ERROR vs. TEMPERATURE
10
9
VREF = 2.0V
CODE = 7Fhex
8
7
6
5
4
3
2
1
0
-40
-15 10 35 60
TEMPERATURE (°C)
85
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(ADC ENABLED, DAC ENABLED)
500
450 DAC CODE = FFhex
400
350
300
250 DAC CODE = 00hex
200
150
100
50 ADC CODE = AAhex
0
2.5 3.0 3.5 4.0
4.5
SUPPLY VOLTAGE (V)
5.0
5.5
DAC OFFSET ERROR
vs. SUPPLY VOLTAGE
10
CODE = 0Ahex
9
8
7
6
5
2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
DAC GAIN ERROR vs. SUPPLY VOLTAGE
10
9
VREF = 2.0V
CODE = FFhex
8
7
6
5
4
3
2
1
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________ 5

5 Page





MAX1102 arduino
8-Bit CODECs
Serial Interface and Control Logic
The MAX1102/MAX1103/MAX1104 have 4-wire serial
interfaces (Figure 4). The CS, SCLK, and DIN inputs
are used to control and configure the device, while the
three-state DOUT provides access to the ADC conver-
sion result. DIN also serves as the data input to the
DAC.
The serial interface provides easy connection to µCs
with SPI, QSPI, and MICROWIRE serial interfaces at
clock rates up to 6MHz. For SPI and QSPI, set CPOL =
CPHA = 0 in the SPI control registers of the µC. Figure
4 gives detailed timing information.
Digital Inputs and Outputs
The logic levels of the MAX1102/MAX1103/MAX1104
digital inputs are set to accept voltage levels from both
+3V and +5V systems regardless of the supply volt-
ages.
Performing a Conversion
Configuring the MAX1102/MAX1103/MAX1104
The MAX1102/MAX1103/MAX1104 must be configured
before a conversion can occur. Following CS falling, on
each rising edge of SCLK, a bit from DIN is clocked
into the MAX1102/MAX1103/MAX1104’s internal shift
register. After CS falls, the first arriving logic “1” bit
defines the MSB of the control byte (START). Until the
START bit arrives, any number of logic “0” bits can be
clocked into DIN with no effect. Table 1 shows the con-
trol-byte format.
Table 1. Control-Byte Format
The control word sets the mode in which the MAX1102/
MAX1103/MAX1104 operate. The enable bits, E0 to E2,
determine what sections of the device are operating by
either enabling or shutting down the two converters and
voltage reference (see Shutdown Modes). The enable
bits are independent of the address bits; for example,
the ADC need not be addressed for it to be shutdown
or powered up.
C0 and C1 are the control bits. C0 sets the conversion
mode, either single or continuous (see Conversion
Modes). C1 determines whether the ADC monitors
VDD/2 or AIN (see Power Sense). When changing C1,
two control words must be written. The first control
word changes the state of the mux. Then wait 3.5µs for
the T/H to acquire the new input. Finally, the second
control word causes the conversion to take place. For
MAX1104 set C1 = 0.
A0 is the ADC address bit. A logic “1” on A0 addresses
the ADC. The control word configures the ADC. A logic
“0” on A0 deselects the ADC. In this state, the ADC is
still active, but does not perform any conversions.
A1 is the DAC address bit. A logic “1” on A1 address-
es the DAC. The control word configures the DAC, and
the eight bits following the control word are read in as
DAC data. The converted analog output is available
after the eighth data bit is read into the device. A logic
“0” deselects the DAC. In this state the DAC is still
active, but ignores any digital inputs.
Both the ADC and DAC can be addresses from the
same control word, allowing both converters to operate
simultaneously.
BIT
7 (MSB)
6
NAME
START
A1
5 A0
4 C1*
3 C0
2 E2
1 E1
0 E0
* Leave C1 = 0 for MAX1104.
DESCRIPTION
1 = designates a new control word. 0 = control word ignored, unless byte is DAC data.
1 = DAC addressed. Current byte configures DAC, the following byte is DAC data.
0 = DAC not addressed.
1 = ADC addressed. Current byte configures ADC. After the 36µs conversion time, the next eight
clock cycles clock out the conversion result.
0 = ADC not addressed.
1 = ADC input to VDD/2.
0 = ADC input to AIN.
1 = Continuous conversion. Control word not required unless the device is reconfigured.
0 = Single conversion. New control word required before next conversion.
1 = Reference enabled. 0 = Reference disabled. Don’t care for MAX1104.
1 = ADC enabled. 0 = ADC disabled.
1 = DAC enabled. 0 = DAC disabled.
______________________________________________________________________________________ 11

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