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This user's guide describes the characteristics, operation, and use of the DAC8803/14
EVM - a multi-device, 14- to 16-bit, SSI, analog-to-digital converter evaluation module.
A complete circuit description as well as schematic diagram and bill of materials are
included.
1
EVM Overview
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6
EVM BOM, Layout and Schematic
7
Related Documentation from Texas Instruments
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Pinout of J3
2
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EVM Overview
1.1
Features
• Evaluation board for the 14-/16-bit current output, multiplying quad DAC8803 or DAC8814
• On-board ±10-V reference and buffer circuits
• High-speed serial interface
• Modular design for use with a variety of DSP and microcontroller interface boards
1.2
Introduction
The DAC8803/14 is a quad, 16-bit, serial input, current output DAC operating from a single 5-V power
supply. This converter provides excellent linearity (±1 LSB INL), low glitch, low noise, and fast settling (0.3
µs typ. to ±0.1% of full-scale output) over the specified temperature range of -40°C to 85°C. Four external
buffer and DPDT switches are provided on the EVM to allow unipolar and bipolar output operation.
The modular EVM form factor allows for direct evaluation of the DAC performance and operating
characteristics. This EVM is compatible with the 5-6K Interface (SLAU104) and HPA-MCU Interface
(SLAU106) Boards from Texas Instruments and additional 3rd party boards such as the HPA449
demonstration board from SoftBaugh, Inc. (www.softbaugh.com) and the Speedy33™ from Hyperception,
Inc. (www.hyperception.com).
Speedy33 is a trademark of Hyperception, Inc.
SLAU184 - May 2006
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Contents
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List of Tables
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DAC8803/14 EVM
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User's Guide
SLAU184 - May 2006
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DAC8803/14 EVM
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Summary of Contents for Texas Instruments DAC8803/14 EVM
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Page 1: Table Of Contents
The modular EVM form factor allows for direct evaluation of the DAC performance and operating characteristics. This EVM is compatible with the 5-6K Interface (SLAU104) and HPA-MCU Interface (SLAU106) Boards from Texas Instruments and additional 3rd party boards such as the HPA449 demonstration board from SoftBaugh, Inc. (www.softbaugh.com) and the Speedy33™ from Hyperception, Inc. -
Page 2: Analog Interface
Switches SW1 through SW4 provide a means to allow unipolar or bipolar output operation of the DAC8803/14 EVM. When the slide switch is to the right, the output voltage on J1.x is ±VREF. With the 10-V on-board reference, this means the output voltage is –10 VDC to +10 VDC. When the switch is to the left, the output from the buffer is 0 V to +10 VDC or 0 V to –10 VDC depending on the position of the... -
Page 3: Digital Interface
MSB pin. Register data = 8000h when MSB = 1. Power Supplies The DAC8803/14 EVM board requires ±12 V and +5 VDC for the analog section. The ±12-V supplies power the reference (U1), it's buffer op-amp (U6), and the inverting reference buffer (U5). The output buffers (U2 and U3) also use the dual ±12-V supplies. -
Page 4: Evm Operation
DAC8803/14 data sheet to determine the maximum analog output range. Digital Control The digital control signals can be applied directly to J2 (top or bottom side). The DAC8803/14 EVM can also be connected directly to a DSP or microcontroller interface board such as the 5-6K Interface Board or the HPA-MCU Interface Board. -
Page 5: Bill Of Materials
EVM BOM, Layout and Schematic EVM BOM, Layout and Schematic Bill of Materials The following table contains a complete bill of materials for the modular DAC8803/14 EVM. Layout information and a schematic diagram are also provided for reference. Table 2. Bill of Materials... - Page 6 Revision History ECN Number Approved Initial Release REFD OPA4277UA 0.1µF 0.1µF DACDa 0 ohm DACDb OPA4277UA REFA +VDAC REFD REFB REFC REFA 0.1µF OPA4277UA 0.01µF CLKX DACAa REFP 11 12 0 ohm 13 14 RfbD 15 16 4.7uF DACAb OPA4277UA /LDAC 17 18 IoutD...
- Page 7 REFP 0.1µF OPA227 +REF TEMP TRIM REFA REFB REFC REFD 0.1µF REF102 0.1µF Output -REF Sense INA105 +VDAC 0.1µF 0.1µF 4.7uF +5VA 4.7uF 4.7uF +3.3VD VD2 -5VA 12500 TI Boulevard. Dallas, Texas 75243 Title: DAC8803_14 EVM Engineer: T. Hendrick Drawn By: T.
- Page 8 Related Documentation from Texas Instruments Related Documentation from Texas Instruments To obtain a copy of any of the following TI documents, call the Texas Instruments Literature Response Center at (800) 477-8924 or the Product Information Center (PIC) at (972) 644-5580. When ordering, identify this booklet by its title and literature number.
- Page 9 EVALUATION BOARD/KIT IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
- Page 10 TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated products in automotive applications, TI will not be responsible for any failure to meet such requirements. Following are URLs where you can obtain information on other Texas Instruments products and application solutions: Products...