Sdp-H1 Controller Board; Solder Links; Analog Inputs; Changes To Table 3 - Analog Devices EVAL-AD4001FMCZ User Manual

Easy to Use AD4000 Series 16-/18-/20-Bit Precision SAR ADCs User Guide

SDP-H1 CONTROLLER BOARD

The evaluation board uses a serial port interface (SPI) and is
connected to the high speed controller board for the system
demonstration platform (SDP-H1) controller board. The
board requires power from a 12 V wall adapter. The
a Xilinx® Spartan 6 and an ADSP-BF527
connectivity to the PC through a USB 2.0 high speed port. The
controller boards allow the configuration and capture of data on
daughter boards from the PC via USB.
The SDP-H1 has an FMC low pin count (LPC) connector with
full differential low voltage differential signaling (LVDS) and
singled-ended low voltage complementary metal-oxide
semiconductor (LVCMOS) support. It also has the 120-pin
connector, found on the SDP-B, which exposes the Blackfin®
processor peripherals. This connector provides a configurable
serial, parallel I 2 C and SPI, and general purpose input/output
(GPIO) communications lines to the attached daughter board.

SOLDER LINKS

The three solder link options on the evaluation board are
configured depending on which generic of the ADC is on the
specific evaluation board, as described in Table 3.
Table 2. Jumper Detail with Factory Default Setting
Link Default Function
SL1 A +V
S
SL2 A −V
S
SL5 A +V
S
SL6 A −V
S
SL7 A VDD for
ADC
SL8 A −V
S
SL9 A +V
S
LK2 A VREF
LK5 B SDI
JP1 B FSEL (U3)
JP2 B ADC drivers
JP3 B ADC drivers
JP4 B ADC drivers
JP5 B ADC drivers
JP7 B V_DRIVE
JP8 B STOP (U20)
SDP-H1
SDP-H1 has
processor with
Comment
Change to B if using bench
supplies
Change to B if using bench
supplies
Change to B if using bench
supplies
Change to B if using bench
supplies
Change to B if using bench
supplies
Change to B if using bench
supplies
Change to B if using bench
supplies
Change to B if using the ADR3450
Change to A if using V_DRIVE
Change to A if using ground
Change to A if using FDA
ADA4940-1
Change to A if using FDA
ADA4940-1
Change to A if using FDA
ADA4940-1
Change to A if using FDA
ADA4940-1
Change to A if using external
3.3 V for V_DRIVE
Change to A if using CNV_FMC
from SDP-H1 connector
Table 3. Jumpers Specific to 10-Lead Precision ADCs
Link Default
SL4 A
SL4 B

ANALOG INPUTS

The analog inputs to the evaluation board are SMA connectors,
J6 and J10. These inputs are buffered with dedicated amplifier
circuitry (U12 and U14), as shown in Figure 27. The circuit allows
different configurations, input range scaling, filtering, addition of a
dc component, and use of different op amp and supplies. The
analog input amplifiers are set as unity-gain buffers at the factory.
The default configuration sets both U12 and U14 at midscale,
generated from a buffered reference voltage divider (VCM).
The evaluation board is factory configured to provide either a
single-ended path or a fully differential path.
For dynamic performance, a fast Fourier transform (FFT) test
can be performed by applying a very low distortion ac source.
For low frequency testing, the audio precision source (such as the
SYS-2700 series) can be used directly because the outputs on these
are isolated. Set the outputs for balanced and floating ground.
Different precision sources can be used with additional filtering.
Because the evaluation board uses the amplifiers in unity-gain,
the noninverting input has a common-mode input with a 590 Ω
resistor divider, and it must be taken into account when directly
connecting a source.
Rev. E | Page 5 of 25
Configuration Generic
Differential input AD4001, AD4003,
AD4020
Single-ended or AD4000,
pseudo differential
UG-1042
AD4002