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Numéro de référence | MAX1227 | ||
Description | (MAX1220 - MAX1228) Multichannel ADCs/DACs | ||
Fabricant | Maxim Integrated Products | ||
Logo | |||
1 Page
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
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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 (4nV•s) and low
digital feedthrough (0.5nV•s) 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.
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Pages | Pages 30 | ||
Télécharger | [ MAX1227 ] |
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