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CMOS, Parallel Loading, Dual, 12-Bit Multiplying DAC

Product Details

Key Features

Parametric specs for Precision DACs (< 1MHz)
Resolution (bits) 12
# Channels 2
Interface Parallel - Full Word
Output Type Current- Unbuffered
Reference Ext.
INL (±LSB) (max) 1
Supply Range (V) (min) 10.8
Supply Range (V) (max) 16.5
ICC (mA) (max) 2
Settling Time (µs) (typ) 0.8
Package/Pins PDIP/24
PLCC/28
SOIC (W)/24
Oper. Temp. (°C) -55 to +125
-40 to +85
-25 to +85
0 to +70
Budgetary
Price (See Notes)
17.55
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Simplified Block Diagram

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Parameters

Parametric specs for Precision DACs (&lt; 1MHz)
Resolution (bits) 12
# Channels 2
Interface Parallel - Full Word
Output Type Current- Unbuffered
Reference Ext.
INL (±LSB) (max) 1
Supply Range (V) (min) 10.8
Supply Range (V) (max) 16.5
ICC (mA) (max) 2
Settling Time (µs) (typ) 0.8
Package/Pins PDIP/24
PLCC/28
SOIC (W)/24
Oper. Temp. (°C) -55 to +125
-40 to +85
-25 to +85
0 to +70
Budgetary
Price (See Notes)
17.55

Key Features

  • Two 12-Bit DACs in One Package
  • 0.5% DAC-to-DAC Matching
  • Narrow 0.3" DIP, Wide SO, and PLCC Packages
  • 4-Quadrant Multiplication
  • Low INL and DNL (±1/2 LSB max)
  • Gain Accuracy to ±1 LSB Max
  • Low Gain Tempco (±5 ppm/°C max)
  • Operates with Single +12V to +15V Supply
  • Fast Microprocessor Interface

Applications/Uses

  • Audio Gain Control
  • Automatic Test Equipment
  • Digitally Controlled Filters
  • Motion Control Systems
  • Process Control
  • Synchro Applications

Description

The Maxim MX7537/MX7547 contain two 12-bit current-output multiplying digital-to-analog converters (DAC) in a single package. Input level shifters, data registers and control logic make microprocessor interfacing straight forward. Operation is from a single +12V to +15V power supply maintaining TTL, 74HC and 5V CMOS logic compatibility. The MX7547 accepts active-low CSA, active-low CSB, active-low WR control signals and 12 data inputs for DAC selection and full parallel data loading. The MX7537 receives data in 2 bytes, using a right justified 8+4 format. A0, A1, active-low CS, active-low WR and UPD signals provide full control for DAC selection and data loading.

Each of the DACs in the MX7537/MX7547 provides 4-quadrant multiplication capabilities and separate reference input and feedback resistor pins. The MX7537 additionally makes available separate AGND pins for applications where each DAC is biased at a difference voltage. Since both DACs are on a single monolithic chip, matching and temperature tracking between them is excellent. Gain error is specified at less than ±1 LSB, and 12-bit linearity and monotonicity are guaranteed over the full operating temperature ranges. Maxim's MX7537 and MX7547 are available in narrow 24-lead 0.3" DIP and Wide SO, as well as, 28-pin-lead PLCC packages.

Simplified Block Diagram

MX7537, MX7547: Functional Block Diagram MX7537, MX7547: Functional Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .