Texas Instruments ADS5423 EVM 사용자 설명서
1.1
Purpose
1.2
EVM Basic Functions
1.3
Power Requirements
1.3.1 Voltage Limits
1.4
EVM Operational Procedure
Chapter 1
SLWU020B – February 2005 – Revised February 2006
Overview
This User’s Guide document gives a general overview of the ADS5423/24/33 and ADS5411 evaluation
module (EVM) and provides a general description of the features and functions to be considered while
using this module.
module (EVM) and provides a general description of the features and functions to be considered while
using this module.
The EVM provides a platform for evaluating the ADS5423/24/33 14-bit analog-to-digital converter (ADC)
under various signals, references, and supply conditions. This evaluation module also allows the
evaluation of the ADS5411, an 11-bit analog-to-digital converter. This document should be used in
combination with the EVM schematic diagram supplied.
under various signals, references, and supply conditions. This evaluation module also allows the
evaluation of the ADS5411, an 11-bit analog-to-digital converter. This document should be used in
combination with the EVM schematic diagram supplied.
Analog input to the ADC is provided via external SMA connectors. The single-ended input the user
provides is converted into a differential signal at the input of the device. One input path uses a differential
amplifier, while the other input is transformer coupled.
provides is converted into a differential signal at the input of the device. One input path uses a differential
amplifier, while the other input is transformer coupled.
The EVM provides an external SMA connector for input of the ADC clock. The single-ended input the user
provides is converted into a differential signal at the input of the device.
provides is converted into a differential signal at the input of the device.
Digital output from the EVM is via a 40-pin connector. The digital outputs from the ADC are buffered
before going to the connector.
before going to the connector.
Power connections to the EVM are via banana jack sockets. Separate sockets are provided for the ADC
analog and digital supplies, the external buffer supply, and the differential amplifier supply.
analog and digital supplies, the external buffer supply, and the differential amplifier supply.
The EVM can be powered directly with only two supplies: a 3.3-V supply for the ADC digital driver supply
and external buffer supply, and 5 V for the ADC analog supply if using the EVM with transformer coupled
analog inputs. If using the differential amplifier analog inputs, ±5 V is required. Provision has also been
made to allow the EVM to be powered with independent 3.3-V supplies to provide higher performance.
and external buffer supply, and 5 V for the ADC analog supply if using the EVM with transformer coupled
analog inputs. If using the differential amplifier analog inputs, ±5 V is required. Provision has also been
made to allow the EVM to be powered with independent 3.3-V supplies to provide higher performance.
Exceeding the maximum input voltages can damage EVM components. Under voltage may cause
improper operation of some or all of the EVM components.
improper operation of some or all of the EVM components.
The EVM provides a flexible means of evaluating the ADS5423/24/33 or ADS5411 in a number of modes
of operation. A basic setup procedure that can be used as a board confidence check is as follows:
of operation. A basic setup procedure that can be used as a board confidence check is as follows:
1. Verify all jumper settings against the schematic jumper list in
SLWU020B – February 2005 – Revised February 2006
Overview
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