19-3294; Rev 3; 3/08
10-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
26/MAX1048
General Description
Features
♦ 10-Bit, 225ksps ADC
The MAX1040/MAX1042/MAX1046/MAX1048 integrate a
multichannel, 10-bit, analog-to-digital converter (ADC)
and a quad, 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 seri-
al interface. The ADC is available in a four or an eight
input-channel version. The four DAC outputs settle within
2.0µs, and the ADC has a 225ksps conversion rate.
Analog Multiplexer with True-Differential
Track/Hold (T/H)
Eight Single-Ended Channels or Four
Differential
Channels (Unipolar or Bipolar)
(MAX1040/MAX1042)
Four Single-Ended Channels or Two Differential
Channels (Unipolar or Bipolar)
(MAX1046/MAX1048)
Excellent Accuracy: 0ꢀ5 ꢁSB ꢂIꢁ, 0ꢀ5 ꢁSB
DIꢁ, Io Missing Codes Over Temperature
All devices include an internal reference (4.096V) provid-
ing 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
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 consumption and proces-
sor requirements. The low glitch energy (4nV•s) and low
digital feedthrough (0.5nV•s) of the integrated quad
DACs make these devices ideal for digital control of fast-
response closed-loop systems.
♦ 10-Bit, Quad, 2µs Settling DAC
Ultra-ꢁow-Glitch Energy (4nV•s)
Power-Up Options from Zero Scale or Full Scale
Excellent Accuracy: 0ꢀ5 ꢁSB ꢂIꢁ
♦ ꢂnternal Reference or External Single-Ended/
Differential Reference
ꢂnternal Reference Voltage (4ꢀ096V)
♦ ꢂnternal 1ꢃC Accurate Temperature Sensor
♦ On-Chip FꢂFO Capable of Storing 16 ADC
Conversion Results and One Temperature Result
♦ On-Chip Channel-Scan Mode and ꢂnternal
Data-Averaging Features
The devices are guaranteed to operate with a supply volt-
age from +4.75V to +5.25V. These devices consume
2.5mA at 225ksps throughput, only 22µA at 1ksps
throughput, and under 0.2µA in the shutdown mode. The
MAX1042/MAX1048 offer four GPIOs that can be config-
ured as inputs or outputs.
♦ Analog Single-Supply Operation: +4ꢀ75V to +5ꢀ25V
♦ Digital Supply: +2ꢀ7V to AV
DD
♦ 25MHz, SPꢂ/QSPꢂ/MꢂCROWꢂRE Serial ꢂnterface
♦ AutoShutdown Between Conversions
♦ ꢁow-Power ADC
2ꢀ5mA at 225ksps
22µA at 1ksps
The MAX1040/MAX1042/MAX1046/MAX1048 are avail-
able in 36-pin thin QFN packages. All devices are speci-
fied over the -40ꢀC to +85ꢀC temperature range.
0ꢀ2µA at Shutdown
♦ ꢁow-Power DAC: 1ꢀ5mA
Applications
♦ Evaluation Kit Available (Order MAX1258EVKꢂT)
Closed-Loop Controls for Optical Components
and Base Stations
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.
System Supervision and Control
Data-Acquisition Systems
Pin Configurations appear at end of data sheetꢀ
Ordering Information/Selector Guide
REF
VOꢁTAGE (V)
AIAꢁOG SUPPꢁY RESOꢁUTꢂOI
ADC
CHAIIEꢁS
DAC
CHAIIEꢁS
PART
PꢂI-PACKAGE
GPꢂOs
VOꢁTAGE (V)
BꢂTS**
MAX1040BETX
MAX1042BETX
MAX1046BETX
MAX1048BETX
36 Thin QFN-EP*
36 Thin QFN-EP*
36 Thin QFN-EP*
36 Thin QFN-EP*
4.096
4.096
4.096
4.096
4.75 to 5.25
4.75 to 5.25
4.75 to 5.25
4.75 to 5.25
10
10
10
10
8
8
4
4
4
4
4
4
0
4
0
4
Iote: All devices are specified over the -40ꢀC to +85ꢀC operating temperature range.
*EP = Exposed pad.
**Number of resolution bits refers to both DAC and ADC.
________________________________________________________________ Maxim ꢂntegrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at wwwꢀmaxim-icꢀcomꢀ
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