General Description
The MAX1340/MAX1342/MAX1346/MAX1348 integrate a
multichannel, 12-bit, analog-to-digital converter (ADC)
and a quad, 12-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 4 or an 8 input-
channel version. The four DAC outputs settle within 2.0µs,
and the ADC has a 225ksps conversion rate.
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 ±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 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.
The devices are guaranteed to operate with a supply
voltage from +4.75V to +5.25V The devices consume
2.5mA at 225ksps throughput, only 22µA at 1ksps
throughput, and under 0.2µA in the shutdown mode. The
MAX1342/MAX1348 offer four GPIOs that can be config-
ured as inputs or outputs.
The MAX1340/MAX1342/MAX1346/MAX1348 are avail-
able in 36-pin thin QFN packages. All devices are speci-
fied 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
♦ 12-Bit, 225ksps ADC
Analog Multiplexer with True-Differential
Track/Hold (T/H)
8 Single-Ended Channels or 4 Differential
Channels (Unipolar or Bipolar)
(MAX1340/MAX1342)
4 Single-Ended Channels or 2 Differential
Channels (Unipolar or Bipolar)
(MAX1346/MAX1348)
Excellent Accuracy: ±0.5 LSB INL, ±0.5 LSB DNL
♦ 12-Bit, Quad, 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 (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
+4.75V to +5.25V
♦ Digital Supply: 2.7V to AV
DD
♦ 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)
MAX1340/MAX1342/MAX1346/MAX1348
12-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
________________________________________________________________
Maxim Integrated Products
1
Ordering Information/Selector Guide
19-3332; Rev 3; 3/08
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.
EVALUATION KIT
AVAILABLE
Pin Configurations appear at end of data sheet.
