CDK-5560 Cirrus Logic Inc, CDK-5560 Datasheet - Page 6

• Manufacturer Part Number: CDK-5560
• Description: Audio Modules & Development Tools KIT CDB5560 w/ Capture Plus II
• Manufacturer: Cirrus Logic Inc

Specifications of CDK-5560

• Product: Audio Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3. HARDWARE DESCRIPTION
3.1
Observe the following limits to ensure the CDB5560 component ratings are not exceeded.
3.2
Power supply connections and requirements are specified in Table 1. below.
Important: It is recommended that all power supplies be isolated from utility ground to prevent the intro-
duction of a ground loop. One ground connection may already exist through the serial port connection to
utility ground. Using the Cirrus Logic CapturePlus II system simplifies making connections to the
CDB5560 by providing electrical isolation between the two.
Using twisted/shielded wire will reduce electrical noise induced onto the power supply cables.
Power supplies are to be adequately regulated and sufficiently low noise to meet the application require-
ments.
3.3
3.3.1
The analog input signal connections to the input buffers are made at the INPUT A and INPUT B connec-
tors, as specified in Table 2.
There are two analog input channels on the evaluation board. National Semiconductor LMP7732. Each
analog input channel consists of two low-noise amplifiers configured as unity gain non-inverting buffers.
The buffers utilize two National Semiconductor LMP7732 precision, low-noise, low-voltage, dual op-
amps. These op-amps enable both the inputs and outputs of the analog input buffer to operate virtually
rail to rail. The channel input impedance is 50 Ohms.
6
+2.5 V DC, ±5%, <50 mA
+3.3 V DC, ±5%, <50 mA
-2.5 V DC, ±5%, <50 mA
Power Supply
Absolute Maximum Ratings
• CS5560
• LMP7732
Power Supply
Requirement
Analog Section
Analog Input Buffers
Channel
INPUT A
INPUT B
– The absolute maximum supply voltage that can be applied to the +3.3V power supply
– The absolute maximum power supply voltage that can be applied between pins VL and V1-
– The absolute maximum power supply voltage that can be applied between the +2.5V and
connection is +3.6V.
is 6.1 V.
-2.5V power supply connections is +5.5V.
Power Supply
Analog Input
Connection
Connection
Table 1. Power Supply Connections
Table 2. Analog Input Connections
E16
E5
E9
J4
J5
Differential Input Signal
-4.096 V to +4.096 V
-4.096 V to +4.096 V
Ground Return
Voltage Range
Associated
E13
E3
E7
TP2, TP1 (GND)
TP4, TP3 (GND)
TP6, TP5 (GND)
Associated
Test Points
Impedance
50 Ohms
50 Ohms
CDB5560
DS713DB4