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PDF MAX1021 Data sheet ( Hoja de datos )
| Número de pieza | MAX1021 | |
| Descripción | (MAX1021 / MAX1043) Multichannel ADCs/DACs | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX1021 (archivo pdf) en la parte inferior de esta página. Total 40 Páginas | ||
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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 (4nV•s) and low digi-
tal feedthrough (0.5nV•s) 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 (4nV•s)
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.
Free Datasheet http://www.datasheet4u.com/
1 page  
10-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
ELECTRICAL CHARACTERISTICS (continued)
(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
INTERNAL REFERENCE
REF1 Output Voltage
REF1 Temperature Coefficient
TCREF
REF1 Short-Circuit Current
VREF = 2.5V
EXTERNAL REFERENCE INPUT
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
Input-Voltage Low
VIH DVDD = 2.7V to 5.25V
VIL
DVDD = 3.6V to 5.25V
DVDD = 2.7V to 3.6V
Input Leakage Current
Input Capacitance
IL
CIN
DIGITAL OUTPUT (DOUT) (Note 14)
Output-Voltage Low
VOL ISINK = 2mA
Output-Voltage High
VOH ISOURCE = 2mA
MIN TYP MAX UNITS
2.482 2.50 2.518
V
±30 ppm/°C
0.39 mA
0.7
AVDD
V
70 100 130
kΩ
2.4
0.01
15
DVDD -
0.5
0.8
0.6
±10
0.4
V
V
µA
pF
V
V
Tri-State Leakage Current
Tri-State Output Capacitance
COUT
DIGITAL OUTPUT (EOC) (Note 14)
Output-Voltage Low
VOL
Output-Voltage High
VOH
ISINK = 2mA
ISOURCE = 2mA
15
DVDD -
0.5
±10
0.4
µA
pF
V
V
Tri-State Leakage Current
Tri-State Output Capacitance
COUT
DIGITAL OUTPUTS (GPIO_) (Note 14)
GPIOC_ Output-Voltage Low
GPIOC_ Output-Voltage High
ISINK = 2mA
ISINK = 4mA
ISOURCE = 2mA
15
DVDD -
0.5
±10
0.4
0.8
µA
pF
V
V
GPIOA_ Output-Voltage Low
GPIOA_ Output-Voltage High
ISINK = 15mA
ISOURCE = 15mA
DVDD -
0.8
0.8 V
V
Tri-State Leakage Current
Tri-State Output Capacitance
COUT
±10
15
µA
pF
_______________________________________________________________________________________ 5
Free Datasheet http://www.datasheet4u.com/
5 Page 
10-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
Typical Operating Characteristics (continued)
(AVDD = DVDD = 3V, external VREF = 2.5V, fCLK = 3.6MHz (50% duty cycle), fSAMPLE = 225ksps, CLOAD = 50pF, 0.1µF capacitor at
REF, TA = +25°C, unless otherwise noted.)
ADC REFERENCE SUPPLY CURRENT
vs. TEMPERATURE
41.0
40.9
40.8
40.7
40.6
AVDD = DVDD = 5V
EXTERNAL REFERENCE = 4.096V
40.5
-40 -15 10
35
TEMPERATURE (°C)
60
85
ADC REFERENCE SUPPLY CURRENT
vs. TEMPERATURE
25.1
25.0
24.9
24.8
AVDD = DVDD = 3V
EXTERNAL REFERENCE = 2.5V
24.7
-40 -15 10
35
TEMPERATURE (°C)
60
85
0
-20
-40
-60
-80
-100
-120
-140
-160
0
ADC FFT PLOT
fSAMPLE = 32.768kHz
fANALOG_)N = 10.080kHz
fCLK = 5.24288MHz
SINAD = 61.21dBc
SNR = 61.21dBc
THD = 73.32dBc
SFDR = 81.25dBc
50 100 150
ANALOG INPUT FREQUENCY (kHz)
200
ADC IMD PLOT
0
fCLK = 5.24288MHz
-20 fIN1 = 9.0kHz
fIN2 = 11.0kHz
-40 AIN = -6dBFS
IMD = 78.0dBc
-60
-80
-100
-120
-140
-160
0
50 100 150
ANALOG INPUT FREQUENCY (kHz)
200
DAC OUTPUT LOAD REGULATION
vs. OUTPUT CURRENT
1.29
1.28
1.27
1.26
1.25
1.24 SINKING
1.23 SOURCING
1.22
DAC OUTPUT = MIDSCALE
1.21
-30 -20 -10 0
10
OUTPUT CURRENT (mA)
20
30
0
-20
-40
-60
-80
-100
-120
-140
-160
0
5
ADC CROSSTALK PLOT
fCLK = 5.24288MHz
fIN1 = 10.080kHz
fIN2 = 8.0801kHz
SNR = 61.11dBc
THD = 73.32dBc
ENOB = 9.86 BITS
SFDR = 86.34dBc
50 100 150
ANALOG INPUT FREQUENCY (kHz)
GPIO OUTPUT VOLTAGE
vs. SOURCE CURRENT
200
4
3 GPIOA0, GPIOA1 OUTPUTS
2 GPIOC0, GPIOC1 OUTPUTS
1
AVDD = DVDD = 5V
EXTERNAL REFERENCE = 4.096V
0
0 20 40 60 80 100
SOURCE CURRENT (mA)
DAC OUTPUT LOAD REGULATION
vs. OUTPUT CURRENT
2.08
AVDD = DVDD = 5V
2.07 EXTERNAL REFERENCE = 4.096V
2.06
2.05
2.04
2.03 SINKING
2.02 SOURCING
2.01
DAC OUTPUT = MIDSCALE
2.00
-30 0
30
60
OUTPUT CURRENT (mA)
GPIO OUTPUT VOLTAGE
vs. SOURCE CURRENT
3.0
90
GPIOA0, GPIOA1 OUTPUTS
2.5
2.0
1.5 GPIOC0,
GPIOC1 OUTPUTS
1.0
0.5
0
0 20 40 60 80 100
SOURCE CURRENT (mA)
______________________________________________________________________________________ 11
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 40 Páginas | |
| PDF Descargar | [ Datasheet MAX1021.PDF ] | |
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