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PDF MAX1042 Data sheet ( Hoja de datos )

Número de pieza MAX1042
Descripción (MAX1040 - MAX1048) Multichannel ADCs/DACs
Fabricantes Maxim Integrated 
Logotipo Maxim Integrated Logotipo



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19-3294; Rev 3; 3/08
EVAALVUAAILTAIOBNLEKIT
10-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
General Description
The MAX1040/MAX1042/MAX1046/MAX1048 integrate a
multichannel, 10-bit, analog-to-digital converter (ADC)
and a quad, 10-bit, digital-to-analog converter (DAC) in a
single IC. The devices also include a temperature sensor
and configurable general-purpose I/O ports (GPIOs) with
a 25MHz SPI™-/QSPI™-/MICROWIRE™-compatible seri-
al interface. The ADC is available in a four or an eight
input-channel version. The four DAC outputs settle within
2.0µs, and the ADC has a 225ksps conversion rate.
All devices include an internal reference (4.096V) provid-
ing a well-regulated, low-noise reference for both the
ADC and DAC. Programmable reference modes for the
ADC and DAC allow the use of an internal reference, an
external reference, or a combination of both. Features
such as an internal ±1°C accurate temperature sensor,
FIFO, scan modes, programmable internal or external
clock modes, data averaging, and AutoShutdown™ allow
users to minimize both power consumption and proces-
sor requirements. The low glitch energy (4nVs) and low
digital feedthrough (0.5nVs) of the integrated quad
DACs make these devices ideal for digital control of fast-
response closed-loop systems.
The devices are guaranteed to operate with a supply volt-
age from +4.75V to +5.25V. These devices consume
2.5mA at 225ksps throughput, only 22µA at 1ksps
throughput, and under 0.2µA in the shutdown mode. The
MAX1042/MAX1048 offer four GPIOs that can be config-
ured as inputs or outputs.
The MAX1040/MAX1042/MAX1046/MAX1048 are avail-
able in 36-pin thin QFN packages. All devices are speci-
fied over the -40°C to +85°C temperature range.
Applications
Closed-Loop Controls for Optical Components
and Base Stations
System Supervision and Control
Data-Acquisition Systems
Features
10-Bit, 225ksps ADC
Analog Multiplexer with True-Differential
Track/Hold (T/H)
Eight Single-Ended Channels or Four
Differential
Channels (Unipolar or Bipolar)
(MAX1040/MAX1042)
Four Single-Ended Channels or Two Differential
Channels (Unipolar or Bipolar)
(MAX1046/MAX1048)
Excellent Accuracy: ±0.5 LSB INL, ±0.5 LSB
DNL, No Missing Codes Over Temperature
10-Bit, Quad, 2µs Settling DAC
Ultra-Low-Glitch Energy (4nVs)
Power-Up Options from Zero Scale or Full Scale
Excellent Accuracy: ±0.5 LSB INL
Internal Reference or External Single-Ended/
Differential Reference
Internal Reference Voltage (4.096V)
Internal ±1°C Accurate Temperature Sensor
On-Chip FIFO Capable of Storing 16 ADC
Conversion Results and One Temperature Result
On-Chip Channel-Scan Mode and Internal
Data-Averaging Features
Analog Single-Supply Operation: +4.75V to +5.25V
Digital Supply: +2.7V to AVDD
25MHz, SPI/QSPI/MICROWIRE Serial Interface
AutoShutdown Between Conversions
Low-Power ADC
2.5mA at 225ksps
22µA at 1ksps
0.2µA at Shutdown
Low-Power DAC: 1.5mA
Evaluation Kit Available (Order MAX1258EVKIT)
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
Pin Configurations appear at end of data sheet.
Ordering Information/Selector Guide
PART
MAX1040BETX
MAX1042BETX
MAX1046BETX
MAX1048BETX
PIN-PACKAGE
36 Thin QFN-EP*
36 Thin QFN-EP*
36 Thin QFN-EP*
36 Thin QFN-EP*
REF
ANALOG SUPPLY RESOLUTION
VOLTAGE (V) VOLTAGE (V)
BITS**
4.096
4.096
4.75 to 5.25
4.75 to 5.25
10
10
4.096
4.75 to 5.25
10
4.096
4.75 to 5.25
10
ADC
CHANNELS
8
8
4
4
DAC
CHANNELS
4
4
4
4
GPIOs
0
4
0
4
Note: All devices are specified over the -40°C to +85°C operating temperature range.
*EP = Exposed pad.
**Number of resolution bits refers to both DAC and ADC.
________________________________________________________________ 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.
Free Datasheet http://www.datasheet4u.com/

1 page




MAX1042 pdf
10-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
ELECTRICAL CHARACTERISTICS (continued)
(AVDD = DVDD = 4.75V to 5.25V, external reference VREF = 4.096V, fCLK = 3.6MHz (50% duty cycle), TA = -40°C to +85°C, unless
otherwise noted. Typical values are at AVDD = DVDD = 5V, TA = +25°C. Outputs are unloaded, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
INTERNAL REFERENCE
REF1 Output Voltage
REF1 Temperature Coefficient
TCREF
REF1 Short-Circuit Current
EXTERNAL REFERENCE INPUT
VREF = 4.096V
REF1 Input Voltage Range
REF1 Input Impedance
VREF1
RREF1
REF modes 01, 10, and 11 (Note 4)
DIGITAL INTERFACE
DIGITAL INPUTS (SCLK, DIN, CS, CNVST, LDAC)
Input-Voltage High
VIH
DVDD = 2.7V to 5.25V
DVDD = 3.6V to 5.25V
Input-Voltage Low
DVDD = 2.7V to 3.6V
VIL DVDD = 3V to 3.6V
DVDD = 2.7V to 3V
Input Leakage Current
Input Capacitance
IL
CIN
DIGITAL OUTPUT (DOUT) (Note 14)
Output-Voltage Low
VOL ISINK = 2mA
Output-Voltage High
VOH ISOURCE = 2mA
Tri-State Leakage Current
Tri-State Output Capacitance
COUT
DIGITAL OUTPUT (EOC) (Note 14)
Output-Voltage Low
VOL
ISINK = 2mA
Output-Voltage High
VOH ISOURCE = 2mA
Tri-State Leakage Current
Tri-State Output Capacitance
COUT
DIGITAL OUTPUTS (GPIO_) (Note 14)
GPIOC_ Output-Voltage Low
ISINK = 2mA
ISINK = 4mA
GPIOC_ Output-Voltage High
ISOURCE = 2mA
GPIOA_ Output-Voltage Low
ISINK = 15mA
GPIOA_ Output-Voltage High
ISOURCE = 15mA
Tri-State Leakage Current
Tri-State Output Capacitance
COUT
MIN TYP MAX UNITS
4.066
4.096
±30
0.63
4.126
V
ppm/°C
mA
0.7
AVDD
V
70 100 130 kΩ
2.4
2.0
0.01
15
DVDD -
0.5
15
DVDD -
0.5
15
DVDD -
0.5
DVDD -
0.8
15
0.8
0.6
0.5
±10
0.4
±10
0.4
±10
0.4
0.8
0.8
±10
V
V
µA
pF
V
V
µA
pF
V
V
µA
pF
V
V
V
V
µA
pF
_______________________________________________________________________________________ 5
Free Datasheet http://www.datasheet4u.com/

5 Page





MAX1042 arduino
10-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
Typical Operating Characteristics (continued)
(AVDD = DVDD = 5V, external VREF = 4.096V, fCLK = 3.6MHz (50% duty cycle), fSAMPLE = 225ksps, CLOAD = 50pF, 0.1µF capacitor
at REF, TA = +25°C, unless otherwise noted.)
TEMPERATURE SENSOR ERROR
vs. TEMPERATURE
1.00
0.75
0.50
0.25
0
-0.25
-0.50
-0.75
-1.00
-40
-15 10 35 60
TEMPERATURE (°C)
85
DYNAMIC RESPONSE FALL TIME
RLOAD = 10kΩ, CLOAD = 100pF
MAX1040 toc31
DAC-TO-DAC CROSSTALK
RLOAD = 10kΩ, CLOAD = 100pF
MAX1040 toc29
VOUTA
2V/div
DYNAMIC RESPONSE RISE TIME
RLOAD = 10kΩ, CLOAD = 100pF
MAX1040 toc30
CS
2V/div
VOUTB
10mV/div
AC-COUPLED
VOUT
2V/div
100μs
MAJOR CARRY TRANSITION
RLOAD = 10kΩ, CLOAD = 100pF
MAX1040 toc32
1μs
DAC DIGITAL FEEDTHROUGH RLOAD = 10kΩ,
CLOAD = 100pF, CS = HIGH, DIN = LOW
MAX1040 toc33
CS
2V/div
CS
2V/div
SCLK
2V/div
VOUT
2V/div
VOUT
20mV/div
AC-COUPLED
VOUT
100mV/div
AC-COUPLED
1μs
NEGATIVE FULL-SCALE SETTLING TIME
RLOAD = 10kΩ, CLOAD = 100pF
MAX1040 toc34
1μs
POSITIVE FULL-SCALE SETTLING TIME
RLOAD = 10kΩ, CLOAD = 100pF
MAX1040 toc35
200ns
ADC REFERENCE FEEDTHROUGH
RLOAD = 10kΩ, CLOAD = 100pF
MAX1040 toc36
VLDAC
2V/div
VOUT_
2V/div
2μs
VLDAC
2V/div
VREF2
2V/div
VOUT_
2V/div
VDAC-OUT
2mV/div
AC-COUPLED
ADC REFERENCE SWITCHING
1μs 200μs
______________________________________________________________________________________ 11
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