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Maxim Integrated Semiconductor Electronic Components Datasheet


MAX1043

(MAX1021 / MAX1043) Multichannel ADCs/DACs


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MAX1043 pdf
19-4009; Rev 1; 3/08
EVAALVUAAILTAIOBNLEKIT
10-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
General Description
The MAX1021/MAX1043 integrate a multichannel, 10-bit,
analog-to-digital converter (ADC) and a 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 serial interface. The ADC is
available in an eight input-channel version. The DAC out-
puts settle within 2.0µs, and the ADC has a 225ksps con-
version rate.
All devices include an internal reference (2.5V) to provide
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 exter-
nal 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 processor
requirements. The low glitch energy (4nVs) and low digi-
tal feedthrough (0.5nVs) of the integrated 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 +2.7V to +5.25V. They consume 2.5mA at
225ksps throughput, only 22µA at 1ksps throughput, and
under 0.2µA in the shutdown mode. The MAX1021/
MAX1043 offer four GPIOs that can be configured as
inputs or outputs.
The MAX1021/MAX1043 are available in 36-pin thin QFN
packages. These devices are specified 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)
Excellent Accuracy: ±0.5 LSB INL, ±0.5 LSB
DNL, No Missing Codes Over Temperature
10-Bit, Octal, 2µs Settling DAC (MAX1021)
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 (2.5V)
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
+2.7V 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
PIN-PACKAGE
REF
ANALOG SUPPLY RESOLUTION
ADC
VOLTAGE (V) VOLTAGE (V)
BITS**
CHANNELS
MAX1021BETX 36 Thin QFN-EP*
2.5
2.7 to 5.25
10
8
MAX1043BETX 36 Thin QFN-EP*
2.5
2.7 to 5.25
10
8
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.
DAC
CHANNELS
8
4
GPIOs
4
4
________________________________________________________________ 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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MAX1043 pdf
10-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
ABSOLUTE MAXIMUM RATINGS
AVDD to AGND .........................................................-0.3V to +6V
DGND to AGND.....................................................-0.3V to +0.3V
DVDD to AVDD .......................................................-3.0V to +0.3V
Digital Inputs to DGND.............................................-0.3V to +6V
Digital Outputs to DGND .........................-0.3V to (DVDD + 0.3V)
Analog Inputs, Analog Outputs and REF_
to AGND ...............................................-0.3V to (AVDD + 0.3V)
Maximum Current into Any Pin (except AGND, DGND, AVDD,
DVDD, and OUT_) ...........................................................50mA
Maximum Current into OUT_.............................................100mA
Continuous Power Dissipation (TA = +70°C)
36-Pin Thin QFN (6mm x 6mm)
(derate 26.3mW/°C above +70°C) ..........................2105.3mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-60°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note: If the package power dissipation is not exceeded, one output at a time can be shorted to AVDD, DVDD, AGND, or DGND
indefinitely.
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
(AVDD = DVDD = 2.7V to 5.25V, external reference VREF = 2.5V, fCLK = 3.6MHz (50% duty cycle), TA = -40°C to +85°C, unless
otherwise noted. Typical values are at AVDD = DVDD = 3V, TA = +25°C. Outputs are unloaded, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
ADC
DC ACCURACY (Note 1)
Resolution
10
Integral Nonlinearity
INL
Differential Nonlinearity
DNL
Offset Error
Gain Error
(Note 2)
Gain Temperature Coefficient
Channel-to-Channel Offset
DYNAMIC SPECIFICATIONS (10kHz sine-wave input, VIN = 2.5VP-P, 225ksps, fCLK = 3.6MHz)
Signal-to-Noise Plus Distortion
SINAD
Total Harmonic Distortion
(Up to the Fifth Harmonic)
THD
Spurious-Free Dynamic Range
SFDR
Intermodulation Distortion
Full-Linear Bandwidth
IMD fIN1 = 9.9kHz, fIN2 = 10.2kHz
SINAD > 70dB
Full-Power Bandwidth
-3dB point
CONVERSION RATE (Note 3)
External reference
TYP
±0.5
±0.5
±0.25
±0.025
±1.4
±0.1
61
-70
66
72
100
1
0.8
MAX
±1.0
±1
±2.0
±2.0
UNITS
Bits
LSB
LSB
LSB
LSB
ppm/°C
LSB
dB
dBc
dBc
dBc
kHz
MHz
µs
Power-Up Time
tPU Internal reference (Note 4)
Conversion
218 clock
cycles
2 _______________________________________________________________________________________
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Part Number MAX1043
Description (MAX1021 / MAX1043) Multichannel ADCs/DACs
Maker Maxim - Maxim
Total Page 40 Pages
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