19-3280; Rev 2; 8/04
10-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
General Description
Features
The MAX1020–MAX1023/MAX1057/MAX1058 integrate a
multichannel, 10-bit, analog-to-digital converter (ADC)
and an octal, 10-bit, 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.
♦ 10-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
All devices include an internal reference (2.5V or 4.096V)
providing a well-regulated, low-noise reference for both
the ADC and DAC. Programmable reference modes for
the ADC and the DAC allow the use of an internal refer-
ence, an external reference, or a combination of both.
Features such as an internal 1ꢀC accurate temperature
sensor, FIFO, scan modes, programmable internal
or external clock modes, data averaging, and
AutoShutdown™ allow users to minimize both power con-
sumption and processor 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 (MAX1021/MAX1023/MAX1057)
and from +4.75V to +5.25V (MAX1020/MAX1022/
MAX1058). The devices consume 2.5mA at 300ksps
throughput, only 22µA at 1ksps throughput, and under
0.2µA in the shutdown mode. The MAX1057/MAX1058
feature 12 GPIOs, while the MAX1020/MAX1021 offer 4
GPIOs that can be configured as inputs or outputs.
♦ 10-Bit, Octal, 2µs Settling DAC
Ultra-Low Glitch Energy (4nV•s)
Power-Up Options from Zero Scale or Full Scale
Excellent Accuracy: ±1 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
The MAX1057/MAX1058 are available in 48-pin thin QFN
packages. The MAX1020–MAX1023 are available in 36-
pin thin QFN packages. All devices are specified over the
-40ꢀC to +85ꢀC temperature range.
♦ Evaluation Kit Available (Order MAX1258EVKIT)
Applications
Controls for Optical Components
Base-Station Control Loops
System Supervision and Control
Data-Acquisition Systems
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
REF
VOLTAGE
(V)
ANALOG
SUPPLY
VOLTAGE (V)
RESOLUTION
BITS***
ADC
DAC
PART
TEMP RANGE PIN-PACKAGE
GPIOs
CHANNELS CHANNELS
MAX1020BETX -40°C to +85°C 36 Thin QFN-EP**
MAX1021BETX* -40°C to +85°C 36 Thin QFN-EP**
MAX1022BETX* -40°C to +85°C 36 Thin QFN-EP**
MAX1023BETX* -40°C to +85°C 36 Thin QFN-EP**
MAX1057BETM -40°C to +85°C 48 Thin QFN-EP**
MAX1058BETM -40°C to +85°C 48 Thin QFN-EP**
4.096
2.5
4.75 to 5.25
2.7 to 3.6
10
10
10
10
10
10
8
8
8
8
8
8
8
4
4
8
4.096
2.5
4.75 to 5.25
2.7 to 3.6
12
12
16
16
0
0
2.5
2.7 to 3.6
12
12
4.096
4.75 to 5.25
*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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