CS5462-IS Cirrus Logic Inc, CS5462-IS Datasheet - Page 5

• Manufacturer Part Number: CS5462-IS
• Description: Other Power Management Low-Cost Pwr/Energy w/Pulse Output IC
• Manufacturer: Cirrus Logic Inc

Specifications of CS5462-IS

• Mounting Style: SMD/SMT
• Package / Case: SOIC-8
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

1. GENERAL DESCRIPTION
The CS5462 is a CMOS monolithic power mea-
surement device with an energy computation en-
gine. The CS5462 combines a programmable gain
amplifier, two ∆Σ ADC’s, system calibration, and
energy-to-frequency conversion circuitry on a sin-
gle chip.
The CS5462 is designed for energy measurement
applications and is optimized to interface to a shunt
or current transformer for current measurement,
and to a resistive divider or transformer for voltage
measurement. The current channel has a pro-
2.
Clock Generator
Crystal Out
Crystal In
CPU Clock Output
Control Pins
Calibration Pins
Program
Selects
Frequency Select
Current Channel Gain
Select
Reset
Energy Pulse Outputs
Energy Output 1
High Freq Output
Negative Energy
Indicator
Analog Inputs/Outputs
PIN DESCRIPTION
1,2,3,4,5,6
6
Positive Power Supply / Prog Sel 7
Neg Energy Indicator / Prog Sel 2
Digital Ground / Prog Sel 1
4
Voltage Reference Output
, 2
5
Differential Voltage Input
Differential Voltage Input
Voltage Reference Input
3
CPU Clock Output
Frequency Select
Calibration Pin 0
4,6,20,22,21,
Digital Ground
21, 22
Crystal Out
5, 23
1,24
18,3
17
19
18
2
7
6
XOUT, XIN - A single stage amplifier inside the chip is connected to these pins and can be used
with a crystal to provide the system clock for the device. Alternatively, an external clock can be
supplied to the XIN pin to provide the system clock for the device.
CPUCLK - Output of on-chip oscillator which can drive one standard CMOS load.
CAL0, CAL1 - Must be tied to a program select pin for calibration.
P1, P2, P3, P4, P5, P6, P7 - Used in Calibration, Frequency Select, and Input Gain Select.
FREQ - Must be tied to a program select pin to determine the frequency of E1 and E2.
IGAIN - Must be tied to a program select pin to determine the Full-Scale Input Voltage Range of
the current channel.
RESET - Low activates Reset
E1, E2 - The energy output pin issues a fixed-width pulse train output with a rate proportional to
real energy.
FOUT - Outputs energy pulses at a maximum rate of 10 kHz. Used for calibration purposes.
NEG - Low indicates negative energy.
DGND / P1
VREFOUT
NEG / P2
CPUCLK
VD+ / P7
VREFIN
DGND
XOUT
FREQ
CAL0
VIN+
VIN-
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
grammable gain amplifier (PGA) which provides
two full-scale input level options. With a single +5 V
supply on VA+/AGND, both of the CS5462’s input
channels accommodate common mode + signal
levels between (AGND - 0.25 V) and VA+.
The CS5462 has three pulse output pins: E1, E2
and FOUT. E1 and E2 can be used to directly drive
a mechanical counter or stepper motor, or inter-
face to a micro controller. The FOUT pin conveys
average real power at a pulse frequency many
times higher than that of the E1 or E2 pulse fre-
quency, allowing for high speed calibration.
XIN
CAL1
E2 / P4
E1 / P5
P3
RESET
FOUT / P6
IGAIN
IIN+
IIN-
VA+
AGND
Crystal In
Calibration Pin 1
Energy Output 2 / Prog Sel 4
Energy Output 1 / Prog Sel 5
Program Select 3
Reset
High Frequency Output / Prog Sel 6
Gain Select
Differential Current Input
Differential Current Input
Positive Analog Supply
Analog Ground
CS5462
5