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PDF MAX1228 Data sheet ( Hoja de datos )

Número de pieza MAX1228
Descripción (MAX1220 - MAX1228) Multichannel ADCs/DACs
Fabricantes Maxim Integrated Products 
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No Preview Available ! MAX1228 Hoja de datos, Descripción, Manual

19-3295; Rev 2; 8/04
EVAALVUAAILTAIOBNLEKIT
12-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
General Description
The MAX1220–MAX1223/MAX1257/MAX1258 integrate a
12-bit, multichannel, analog-to-digital converter (ADC),
and a 12-bit, octal, digital-to-analog converter (DAC) in a
single IC. These devices also include a temperature sen-
sor and configurable general-purpose I/O ports (GPIOs)
with a 25MHz SPI™-/QSPI™-/MICROWIRE™-compatible
serial interface. The ADC is available in 8/12/16 input-
channel versions. The octal DAC outputs settle within
2.0µs and the ADC has a 300ksps conversion rate.
All devices include an internal reference (2.5V or
www.D4ea.r0eta9n6SchVee)emfto4orUd.becosotmhalltohwe
ADC and DAC. Programmable ref-
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 power consumption and proces-
sor requirements. The low glitch energy (4nVs) and low
digital feedthrough (0.5nVs) of the integrated octal
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 +3.6V (MAX1221/MAX1223/MAX1257)
and from +4.75V to +5.25V (MAX1220/MAX1222/
MAX1258). These devices consume 2.5mA at 300ksps
throughput, only 22µA at 1ksp throughput, and under
0.2µA in the shutdown mode. The MAX1257/MAX1258
feature 12 GPIOs, while the MAX1220/MAX1221 offer 4
GPIOs that can be configured as inputs or outputs.
The MAX1220–MAX1223 are available in 36-pin thin
QFN packages. The MAX1257/MAX1258 are available
in 48-pin thin QFN packages. All devices are specified
over the -40°C to +85°C temperature range.
Applications
Controls for Optical Components
Base-Station Control Loops
System Supervision and Control
Data-Acquisition Systems
Features
12-Bit, 300ksps ADC
Analog Multiplexer with True-Differential
Track/Hold (T/H)
16 Single-Ended Channels or 8 Differential
Channels (Unipolar or Bipolar)
12 Single-Ended Channels or 6 Differential
Channels (Unipolar or Bipolar)
8 Single-Ended Channels or 4 Differential
Channels (Unipolar or Bipolar)
Excellent Accuracy: ±0.5 LSB INL, ±0.5 LSB DNL
12-Bit, Octal, 2µs Settling DAC
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 or 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
+2.7V to +3.6V or +4.75V to +5.25V
25MHz, SPI/QSPI/MICROWIRE Serial Interface
AutoShutdown Between Conversions
Low-Power ADC
2.5mA at 300ksps
22µA at 1ksps
0.2µA at Shutdown
Low-Power DAC: 1.5µA
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.
Ordering Information/Selector Guide
PART
TEMP RANGE
PIN-PACKAGE
REF
VOLTAGE
(V)
ANALOG
SUPPLY
VOLTAGE (V)
RESOLUTION
BITS***
ADC
CHANNELS
DAC
CHANNELS
GPIOs
MAX1220BETX -40°C to +85°C 36 Thin QFN-EP** 4.096 4.75 to 5.25
12
8 84
MAX1221BETX* -40°C to +85°C 36 Thin QFN-EP** 2.5
2.7 to 3.6
12
8 84
MAX1222BETX* -40°C to +85°C 36 Thin QFN-EP** 4.096 4.75 to 5.25
12
12 8 0
MAX1223BETX* -40°C to +85°C 36 Thin QFN-EP** 2.5
2.7 to 3.6
12
12 8 0
MAX1257BETM -40°C to +85°C 48 Thin QFN-EP** 2.5
2.7 to 3.6
12
16 8 12
MAX1258BETM -40°C to +85°C 48 Thin QFN-EP** 4.096 4.75 to 5.25
12
16 8 12
*Future product—contact factory for availability.
**EP = Exposed pad.
***Number of resolution bits refers to both DAC and ADC.
Pin Configurations appear at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

1 page




MAX1228 pdf
12-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
ELECTRICAL CHARACTERISTICS (continued)
(AVDD = DVDD = 2.7V to 3.6V (MAX1221/MAX1223/MAX1257), external reference VREF = 2.5V (MAX1221/MAX1223/MAX1257), AVDD =
DVDD = 4.75V to 5.25V (MAX1220/MAX1222/MAX1258), external reference VREF = 4.096V (MAX1220/MAX1222/MAX1258), fSCLK = 4.8MHz
(50% duty cycle), TA = -40°C to +85°C, unless otherwise noted. Typical values are at AVDD = DVDD = 3V (MAX1221/MAX1223/MAX1257),
AVDD = DVDD = 5V (MAX1220/MAX1222/MAX1258), TA = +25°C. Outputs are unloaded, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
Wake-Up Time (Note 12)
1kOutput Termination
From power-down mode, AVDD = 5V
From power-down mode, AVDD = 2.7V
Programmed in power-down mode
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At wake-up or programmed in
power-down mode
DYNAMIC PERFORMANCE (Notes 5, 13)
Output-Voltage Slew Rate
SR Positive and negative
Output-Voltage Settling Time
Digital Feedthrough
tS To 1 LSB, 400 - C00 hex (Note 7)
Code 0, all digital inputs from 0 to DVDD
Major Code Transition Glitch
Impulse
Between codes 2047 and 2048
Output Noise (0.1Hz to 50MHz)
From VREF
Using internal reference
Output Noise (0.1Hz to 500kHz)
From VREF
Using internal reference
DAC-to-DAC Transition
Crosstalk
INTERNAL REFERENCE
REF1 Output Voltage (Note 8)
MAX1221/MAX1223/MAX1257
MAX1220/MAX1222/MAX1258
REF1 Temperature Coefficient
TCREF
REF1 Short-Circuit Current
EXTERNAL-REFERENCE INPUT
VREF = 2.5V
VREF = 4.096V
REF1 Input Voltage Range
VREF1 REF modes 01, 10, and 11 (Note 4)
REF1 Input Impedance
RREF1
DIGITAL INTERFACE
DIGITAL INPUTS (SCLK, DIN, CS, CNVST, LDAC)
Input-Voltage High
VIH
Input-Voltage Low
VIL
Input Leakage Current
IL
Input Capacitance
CIN
DIGITAL OUTPUT (DOUT) (Note 14)
DVDD = 2.7V to 5.25V
DVDD = 3.6V to 5.25V
DVDD = 2.7V to 3.6V
Output-Voltage Low
VOL ISINK = 2mA
MIN
3
2.482
4.066
0.7
70
2.4
TYP MAX
25
21
1
100
25
0.5
4
660
720
260
320
0.5
2.5
4.096
±30
0.39
0.63
2.518
4.126
AVDD
100 130
±0.01
15
0.8
0.6
±10
0.4
UNITS
µs
k
k
V/µs
µs
nVs
nVs
µVP-P
µVP-P
nVs
V
ppm/°C
mA
V
k
V
V
µA
pF
V
_______________________________________________________________________________________ 5

5 Page





MAX1228 arduino
12-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
Typical Operating Characteristics (continued)
(AVDD = DVDD = 3V (MAX1221/MAX1223/MAX1257), external VREF = 2.5V (MAX1221/MAX1223/MAX1257), AVDD = DVDD = 5V
(MAX1220/MAX1222/MAX1258), external VREF = 4.096V (MAX1220/MAX1222/MAX1258), fCLK = 4.8MHz (50% duty cycle), fSAMPLE
= 300ksps, CLOAD = 50pF, 0.1µF capacitor at REF, TA = +25°C, unless otherwise noted.)
ANALOG SUPPLY CURRENT
vs. TEMPERATURE
2.16
DAC INTEGRAL NONLINEARITY
vs. OUTPUT CODE
1.5
DAC INTEGRAL NONLINEARITY
vs. OUTPUT CODE
1.5
2.15 1.0 1.0
2.14
www.DataSheet4U.com
2.13
0.5
0
0.5
0
2.12 -0.5 -0.5
2.11
MAX1221/MAX1223/MAX1257
2.10
-40 -15 10 35
TEMPERATURE (°C)
60
85
DAC DIFFERENTIAL NONLINEARITY
vs. OUTPUT CODE
0.4
-1.0
MAX1220/MAX1222/MAX1258
-1.5
0 1024 2048
OUTPUT CODE
3072
4096
DAC DIFFERENTIAL NONLINEARITY
vs. OUTPUT CODE
0.4
-1.0
MAX1221/MAX1223/MAX1257
-1.5
0 1024 2048
OUTPUT CODE
3072
4096
DAC FULL-SCALE ERROR
vs. ANALOG SUPPLY VOLTAGE
0.20
0.2
0
-0.2
MAX1220/MAX1222/MAX1258
-0.4
2047 2050 2053 2056 2059 2062
OUTPUT CODE
DAC FULL-SCALE ERROR
vs. ANALOG SUPPLY VOLTAGE
-2.1
-2.2
-2.3
-2.4
MAX1221/MAX1223/MAX1257
-2.5
2.7 3.0 3.3
SUPPLY VOLTAGE (V)
3.6
0.2
0
-0.2
MAX1221/MAX1223/MAX1257
-0.4
2047 2050 2053 2056 2059 2062
OUTPUT CODE
DAC FULL-SCALE ERROR
vs. TEMPERATURE
5
4
3
INTERNAL REFERENCE
2
1 EXTERNAL REFERENCE = 4.096V
0
-1
MAX1220/MAX1222/MAX1258
-2
-40 -15 10 35
TEMPERATURE (°C)
60
85
0.16
0.12
0.08
0.04
MAX1220/MAX1222/MAX1258
0
4.75 4.85 4.95 5.05
5.15
SUPPLY VOLTAGE (V)
5.25
DAC FULL-SCALE ERROR
vs. TEMPERATURE
0
-1
-2
EXTERNAL REFERENCE = 2.500V
-3
-4
INTERNAL REFERENCE
-5
-6
-7
MAX1221/MAX1223/MAX1257
-8
-40 -15 10 35
TEMPERATURE (°C)
60
85
______________________________________________________________________________________ 11

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