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Linear Technology DC2196A-A Demo Manual

Linear Technology DC2196A-A Demo Manual

8-channel 16-bit/12-bit ±10v vout softspan dacs with 10ppm/c max reference

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Description
Demonstration circuit 2196A features the
8-channel 16-Bit/12-Bit ±10V V
10ppm/°C max reference in a 5mm × 5mm QFN package.
This device features per-channel SoftSpan configuration
with five output ranges: 0V to 5V, 0V to 10V, ±2.5V, ±5V,
and ±10V. A toggle feature allows any or all DACs to switch
between two programmed codes via a single SPI command
or by the TGP input pin. The versatile SPI interface can
operate on any logic level between 1.71V and 5.5V, for
easy interface to lower voltage microcontrollers or FPGAs.
ANALOG SUPPLIES
(±15V ALLOWS ALL
SOFTSPAN RANGES)
+
+
±10V V
LTC
2666,
®
SoftSpan™ DACs with
OUT
OVERTEMPERATURE
SEE TEXT. LDAC, TGP , CLR
OUTPUT
PULLED TO IOVCC W/5k
Figure 1. Connection Diagram
DEMO MANUAL DC2196A
8-Channel 16-Bit/12-Bit
SoftSpan DACs with
OUT
10ppm/°C Max Reference
DC2196A-A is populated with the 16-bit version of the
LTC2666. DC2196A-B is populated with the 12-bit version
for lower resolution applications.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2196A
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
SoftSpan and QuikEval are trademarks of Linear Technology Corporation. All other trademarks
are the property of their respective owners.
MEASURE REF VOLTAGE,
MUX OUTPUT
SIGNAL
GROUND
DAC
OUTPUTS
SIGNAL
GROUND
dc2196af
1

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Summary of Contents for Linear Technology DC2196A-A

  • Page 1 ±10V. A toggle feature allows any or all DACs to switch L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and between two programmed codes via a single SPI command SoftSpan and QuikEval are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
  • Page 2: Quick Start Procedure

    DEMO MANUAL DC2196A Quick start proceDure Download and install QuikEval™ from: Connect the controller to the host PC’s USB port and run QuikEval. The DC2196A software will be downloaded and http://www.linear.com/designtools/software/#Data installed, after which a jumper setting window will appear Connect a DC590 controller or DC2026 Linduino with as shown in Figure 2.
  • Page 3 DEMO MANUAL DC2196A Quick start proceDure Figure 3. Main Control Panel dc2196af...
  • Page 4 DEMO MANUAL DC2196A Quick start proceDure External Connections MUX: Monitor Mux output. Allows surveying the DAC outputs under software control. Must be measured with J1: Interface connector to DC590 controller or Linduino. a high impedance meter (output impedance is nominally Provides OVP power, SPI interface, and board identifica- 2.1kΩ).
  • Page 5 DEMO MANUAL DC2196A Quick start proceDure Jumpers LEDs REF_SEL (JP1): Selects internal or external reference OVRTMP: Lights when OVRTMP pin asserts, indicating an mode. (See data sheet description of REFCOMP pin.) overtemperature state. (Note that LED will light if positive analog supply is present and OVP is not.
  • Page 6: Parts List

    RES, CHIP, 1k, 1/10W, 1% 0603 VISHAY, CRCW06031K00FKEA IC, LT1761ES5-5, SOT23-5 LINEAR TECHNOLOGY, LT1761ES5-5#PBF IC, 24LC025-I/ST, TSSOP8 MICROCHIP, 24LC025-I/ST DC2196A-A Required Circuit Components IC, 16-BIT, QFN32UH-5X5 LINEAR TECHNOLOGY, LTC2666IUH-16 DC2196A-B Required Circuit Components IC, 12-BIT, QFN32UH-5X5 LINEAR TECHNOLOGY, LTC2666IUH-12 dc2196af...
  • Page 7: Schematic Diagram

    Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
  • Page 8 Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods.

This manual is also suitable for:

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