cs5451 ETC-unknow, cs5451 Datasheet

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cs5451

Manufacturer Part Number
cs5451
Description
Channel Delta Sigma Analog Digital Converter
Manufacturer
ETC-unknow
Datasheet

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Features
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Preliminary Product Information
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.cirrus.com
Synchronous Sampling
On-chip 1.2 V Reference (25 ppm/°C typ)
Power Supply Configurations:
– VA+ = +3 V; VA- = -2 V; VD+ = +3 V
– Supply tolerances ±10%
Power Consumption
– 20 mW Typical at VD+ = +3 V
Simple Four-wire Serial Interface
Charge Pump Driver output generates
negative power supply.
Ground-Referenced Bipolar Inputs
Six-Channel Delta-Sigma Analog-to-Digital Converter
VREFOUT
VREFIN
VIN1+
VIN2+
VIN2-
VIN3+
VIN3-
VIN1-
GAIN
IIN1+
IIN1-
IIN2+
IIN2-
IIN3+
IIN3-
Reference
Voltage
x1, 20
x1
x1, 20
x1
x1, 20
x1
x1
AGND
VA+
4th Order ∆Σ Modulator
2nd Order ∆Σ Modulator
4th Order ∆Σ Modulator
4th Order ∆Σ Modulator
2nd Order ∆Σ Modulator
2nd Order ∆Σ Modulator
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
VA-
RESET
Copyright  Cirrus Logic, Inc. 2000
Description
The CS5451 is a highly integrated Delta-Sigma (∆Σ) An-
alog-to-Digital Converter (ADC) developed for the Power
Measurement Industry. The CS5451 combines six ∆Σ
ADCs, decimation filters, and a serial interface on a sin-
gle chip. The CS5451 interfaces directly to a current
transformer or shunt to measure current, and resistive
divider or transformer to measure voltage. The product
features a serial interface for communication with a mi-
cro-controller or DSP. The product is initialized and fully
functional upon reset, and includes a Voltage Reference.
ORDERING INFORMATION:
Decimation Filter
Decimation Filter
Decimation Filter
Decimation Filter
Decimation Filter
Decimation Filter
CLOCK
(All Rights Reserved)
CS5451-BS
XIN
Pulse Output
Regulator
-40°C to +85°C
Interface
Serial
DGND
VD+
OWRS
SE
SDO
FSO
SCLK
CPD
CS5451
28-pin SSOP
DS458PP4
JUL ‘01
1

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cs5451 Summary of contents

Page 1

... FAX: (512) 445 7581 http://www.cirrus.com Description The CS5451 is a highly integrated Delta-Sigma (∆Σ) An- alog-to-Digital Converter (ADC) developed for the Power Measurement Industry. The CS5451 combines six ∆Σ ADCs, decimation filters, and a serial interface on a sin- gle chip ...

Page 2

... Cirrus Logic, Inc. The names of products of Cirrus Logic, Inc. or other vendors and suppliers appearing in this document may be trademarks or service marks of their respective owners which may be registered in some jurisdictions. A list of Cirrus Logic, Inc. trade- marks and service marks can be found at http://www.cirrus.com. 2 CS5451 DS458PP4 ...

Page 3

... Gain=20 EII 50 Gain=1 EII - Gain=20 - Gain=1 - Gain=20 - Gain=1 - Gain= Gain=1 VIN - Gain=1 VOS - (50 (Note 3) EII - - - - OWRS = “0” OWR - OWRS = “1” OWR - CS5451 Typ Max Unit - - VA+ V XIN ± ±800 - mV 0.500 -120 kΩ ...

Page 4

... PSRR = 20 log V   -40 °C to +85 °C; +2.7V < VA+ < +3.5V; +2.7V < VD+ < +3.5V; A Symbol V 0 (VD+) - 1.0 out 5 out OL (Note out CS5451 Min Typ Max Unit 1. ppm/° 1.15 1.2 1. µ ...

Page 5

... VREF+ (AGND, DGND = 0.0 V; See Note 8.) Symbol Positive Digital VD+ Positive Analog VA+ Negative Analog VA- (Note 9 and 10 OUT (Note 11) PDN All Analog Pins V VA- - 0.3 INA All Digital Pins V IND stg CS5451 Min Typ Max Unit 2.7 3.0 3.5 V 2.7 3.0 3.5 V -2.2 -2 Min Typ Max Unit -0 ...

Page 6

... Figure 1. Serial Port Timing Min Typ Max 3 4.000 - 1.0 rise - 1.0 fall - 50 - 500 - 1000 LSB(I3 CS5451 Unit 5 MHz % µ µ kHz - kHz - SCLK - SCLK ns - SCLK - SCLK ns ns DS458PP4 ...

Page 7

... These voltages rep- resent the maximum zero-to-peak voltage levels that can be presented to the inputs. The CS5451 is designed to accommodate common mode + signal levels from VA- to VA+. Figure 2 illustrates the CS5451 typical inputs and power supply connec- tions ...

Page 8

... Serial Interface -32768 The CS5451 communicates with a target device via a master serial data output port. Output data is pro- vided on the SDO output synchronous with the SCLK output. A third output, FSO framing signal used to signal the start of output data. These ...

Page 9

... Voltage Channels. ± 2.7 The CS5451 is specified for operation with a +1.2 V reference between the VREFIN and AGND pins. The converter includes an internal 1.2 V reference (50 ppm/°C drift) that can be used by connecting the VREFOUT pin to the VREFIN pin of the de- vice ...

Page 10

... Note: Refer to the CDB5460A Evaluation Board for suggested layout details and Applications Note 18 for more detailed layout guidelines. Before layout, please call for our Free Schematic Review Service. CS5451 DS458PP4 ...

Page 11

... VIN3- VIN2 IIN3+ IIN2 IIN3- IIN2 CS5451 Digital Supply Digital Ground Charge Pump Drive Master Clock Reset Output Word Rate Select Differential Voltage Input 1 Differential Voltage Input 1 Differential Current Input 1 Differential Current Input 1 Differential Voltage Input 2 Differential Voltage Input 2 ...

Page 12

... VD+ - Positive Digital Supply The positive digital supply is nominally +3 V ±10% relative to DGND. DGND - Digital Ground The digital ground is typically at the same level as AGND. CPD - Charge Pump Drive This output pin drives the external charge pump circuitry to create a negative supply voltage. 12 CS5451 DS458PP4 ...

Page 13

... SEATING SIDE VIEW NOM MAX MIN -- 0.084 0.006 0.010 0.05 0.069 0.074 1.62 -- 0.015 0.22 0.4015 0.413 9.90 0.307 0.323 7.40 0.209 0.220 5.00 0.026 0.030 0.55 0.0354 0.041 0.63 4° 8° JEDEC #: MO-150 ∝ END VIEW L PLANE MILLIMETERS NOM MAX -- -- 2.13 0.13 0.25 1.75 1.88 -- 0.38 10.20 10.50 7.80 8.20 5.30 5.60 0.65 0.75 0.90 1.03 0° 4° 8° CS5451 NOTE 2 ...

Page 14

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