Evaluation Board Hardware; Ad7386 Description; Power Supplies - Analog Devices EVAL-AD7386FMCZ User Manual

UG-1615

EVALUATION BOARD HARDWARE

AD7386 DESCRIPTION
The AD7386 is a 16-bit dual, simultaneous sampling, high
speed, low power, successive approximation ADC and features a
throughput rate of 4 MSPS. The analog input type is differential.
The AD7386 can accept a wide common-mode input voltage
and is sampled and converted on the falling edge of CS .
The AD7386 has an optional integrated, on-chip, oversampling
block to improve dynamic range and reduce noise at lower
bandwidths. An internal 2.5 V reference is included.
Alternatively, an external reference up to 3.3 V can be used.
The conversion process and data acquisition use standard control
inputs, allowing easy interfacing to microprocessors or digital
signal processors (DSPs). The
2.5 V, and 3.3 V interfaces, using the separate logic supply.
The AD7386 is available in a 16-lead LFCSP with operation
specified from −40°C to +125°C.
Table 1. Optional External Power Supplies
Power Supply Connector
12V P4-1
GND P4-2
VCC P5-1
GND P5-2
VLOGIC P5-3
AMP− P6-1
GND P6-2
AMP+ P6-3
INPUT
SIGNALS
AD7386 is compatible with 1.8 V,
Voltage Range (V)
12 ± 10%
0
3.3 ± 5%
0
2.3 ± 5%
5 ± 5%
0
−2.5 ± 5%
ON-BOARD
VCC

POWER SUPPLIES

VLOGIC
ADP7104
GND
+5V
AMP+
ADP166
AMP+
+2.3V
AMP–
VLOGIC
GND
ADA4896-2
V
LOGIC
A x0
IN
ADA4896-2
A x1
IN
ADR4533
+3.3V
Figure 3. EVAL-AD7386FMCZ Functional Block Diagram
POWER SUPPLIES
The EVAL-AD7386FMCZ operates from a 12 V power supply.
Ensure that all link positions are set according to the required
operating mode before applying power and signals to the
EVAL-AD7386FMCZ. See Table 2 for the complete list of link
options.
The EVAL-AD7386FMCZ is powered by the
board by default. External power supplies can be applied to the
board. See Table 1 for a description of the connectors used and
Table 2 for the link configurations required.
Description
Main board power supply for all internal voltage regulators
Ground
ADC analog power supply
Ground
Digital serial peripheral input (SPI) power supply
Amplifier positive power supply
Ground
Amplifier negative power supply
12V DC
INPUT
GND
ADP7182
–2.5V
AMP+
POWER
ADP166 GOOD
+3.3V
VCC
V GND
CC
CS
SCLK
AD7386
SPI
SDI
SDOA
SDOB/ALERT
REFIO
ADR4525
+2.5V
Rev. A | Page 4 of 21
EVAL-AD7386FMCZ
TO PC
USB
12V
DIGITAL
SIGNAL
PROCESSOR
SPI
SERIAL
INTERFACE
EVAL-SDP-CH1Z
CONTROLLER
BOARD
User Guide
EVAL-SDP-CH1Z