CDB5466U
1. HARDWARE
1.1 Introduction
The CS5466 is a low cost power measurement solution combining two ∆Σ analog-to-digital converters (ADCs), an
energy-to-frequency converter, and energy pulse outputs on a single chip. It is designed to accurately measure and
calculate energy for single phase, 2- or 3-wire power metering applications with minimal external components.
Low-frequency energy outputs, E1 and E2 supply average active power and can be used to drive a stepper motor
or a mechanical counter; the high-frequency energy output FOUT is designed to assist in calibration; and NEG in-
dicates negative energy.
The CS5466 has configuration pins which allow the selection of pulse output frequency, current channel input range,
and the high-pass filter enable option. The CS5466 also has a power-on reset function which holds the part in reset
until the supply reaches the proper level. The CDB5466U is shipped with a CS5466-ISZ device located at U6.
1.2
Evaluation Board Overview
The CDB5466U evaluation board provides a quick path to evaluating the CS5466 Power Measurement IC. Figure
1 illustrates the placement of the terminals, jumpers and IC components. The jumper options are shown in the fac-
tory default positions.
+5V
GND
VD+_EXT
Vu+_EXT
JTAG
USB
J3
J4
J5
J6
J1
J2
JP1
TP1 TP2
TP4
TP3
GND
8051_REGIN
Vu+_EXT
VD+
VD+_EXT
+5V
+3.3V
GND
VD+
+5V
VD+
TP5
U3
TP6
J8
J9
U4
JP2
GND
S1
JP3
LED_EN
LED_EN
E1
E2
1
RESET
J10
1
J13
J11
GND
J14
J23
J12
E1
E2
LT1019
REF+
REF+
GND
CDB5466U REV X
XOUT XIN
TP7 TP8
LED_EN
LED_EN
FOUT
FOUT
NEG
1
NEG
RESET
J15
1
J16
Y1
GND
4.096MHz
JP4
U7
GND
VIN+
VIN-
GND
J17
VIN+
TP9
GND
U5
GND
VREF
VIN+
VIN-
CPUCLK
TP10
VREF
GND
TP11
VIN-
J22
J27
GND
IIN+
IIN-
J24
GND
VREF
IIN+
IIN-
VREF
GND
J25
IIN+
TP12
JP5
GND
J28
J29
J30
J31
J32
J33
VD+
FOUT
GND
VA+
GND
GNDVD+
TP13
GND
IIN-
J26
JP6
GND
FREQ2 FREQ1 FREQ0 IGAIN1 IGAIN0 HPF
CS5466 CONFIG
Figure 1. CDB5466U Assembly Drawing
DS676DB1
3
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