AD73360LAR-REEL7 Analog Devices Inc, AD73360LAR-REEL7 Datasheet

IC ANALOG FRONT END 6CH 28-SOIC

AD73360LAR-REEL7

Manufacturer Part Number
AD73360LAR-REEL7
Description
IC ANALOG FRONT END 6CH 28-SOIC
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD73360LAR-REEL7

Number Of Channels
6
Rohs Status
RoHS non-compliant
Number Of Bits
16
Power (watts)
80mW
Voltage - Supply, Analog
3V
Voltage - Supply, Digital
3V
Package / Case
28-SOIC (7.5mm Width)
Analog Front End Type
General Purpose
Analog Front End Category
General Purpose
Interface Type
Serial (6-Wire)
Sample Rate
64KSPS
Input Voltage Range
0.789V
Operating Supply Voltage (min)
2.7V
Operating Supply Voltage (typ)
3.3V
Operating Supply Voltage (max)
3.6V
Resolution
16b
Number Of Adc's
6
Power Supply Type
Analog/Digital
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
28
Package Type
SOIC W
For Use With
EVAL-AD73360LEB - BOARD EVAL FOR AD73360L
Lead Free Status / RoHS Status
Not Compliant
a
GENERAL DESCRIPTION
The AD73360L is a six-input channel analog front-end proces-
sor for general-purpose applications, including industrial power
REFCAP
REFOUT
VINN2
VINN3
VINP4
VINN4
VINN1
VINP2
VINP3
VINP5
VINN5
VINP6
VINN6
VINP1
CONDITIONING
CONDITIONING
CONDITIONING
CONDITIONING
CONDITIONING
CONDITIONING
SIGNAL
SIGNAL
SIGNAL
SIGNAL
SIGNAL
SIGNAL
FUNCTIONAL BLOCK DIAGRAM
0/38dB
0/38dB
0/38dB
0/38dB
0/38dB
0/38dB
PGA
PGA
PGA
PGA
PGA
PGA
REFERENCE
MODULATOR
MODULATOR
MODULATOR
MODULATOR
MODULATOR
MODULATOR
ANALOG
ANALOG
ANALOG
ANALOG
ANALOG
ANALOG
-
-
-
-
-
-
metering or multichannel analog inputs. It features six 16-bit
A/D conversion channels, each of which provides 76 dB signal-
to-noise ratio over a dc-to-4 kHz signal bandwidth. Each
channel also features a programmable input gain amplifier (PGA)
with gain settings in eight stages from 0 dB to 38 dB.
The AD73360L is particularly suitable for industrial power
metering as each channel samples synchronously, ensuring that
there is no (phase) delay between the conversions. The AD73360L
also features low group delay conversions on all channels.
An on-chip reference voltage is included with a nominal value
of 1.2 V.
The sampling rate of the device is programmable, with four
separate settings offering 64 kHz, 32 kHz, 16 kHz, and 8 kHz
sampling rates (from a master clock of 16.384 MHz).
A serial port (SPORT) allows easy interfacing of single or cas-
caded devices to industry-standard DSP engines. The SPORT
transfer rate is programmable to allow interfacing to both fast
and slow DSP engines.
The AD73360L is available in 28-lead SOIC package.
AD73360L
DECIMATOR
DECIMATOR
DECIMATOR
DECIMATOR
DECIMATOR
DECIMATOR
SERIAL
PORT
I/O
Six-Input Channel
Analog Front End
SDI
MCLK
SE
SDO
SDOFS
SDIFS
SCLK
RESET
AD73360L

Related parts for AD73360LAR-REEL7

AD73360LAR-REEL7 Summary of contents

Page 1

GENERAL DESCRIPTION The AD73360L is a six-input channel analog front-end proces- sor for general-purpose applications, including industrial power VINP1 SIGNAL CONDITIONING VINN1 VINP2 SIGNAL CONDITIONING VINN2 VINP3 SIGNAL CONDITIONING VINN3 REFCAP REFOUT VINP4 SIGNAL CONDITIONING VINN4 VINP5 SIGNAL CONDITIONING ...

Page 2

AD73360L–SPECIFICATIONS Parameter REFERENCE REFCAP Absolute Voltage, V REFCAP REFCAP TC REFOUT Typical Output Impedance Absolute Voltage, V REFOUT Minimum Load Resistance Maximum Load Capacitance ADC SPECIFICATIONS 2, 3 Maximum Input Range at VIN Nominal Reference Level at VIN (0 dBm0) ...

Page 3

Parameter LOGIC OUTPUT V , Output High Voltage Output Low Voltage OL Three-State Leakage Current POWER SUPPLIES AVDD1, AVDD2 DVDD NOTES 1 Operating temperature range is as follows: –40°C to +85°C. Therefore ...

Page 4

AD73360L 100 OUTPUT PIN C L 15pF 100 MCLK SCLK SCLK IS INDIVIDUALLY PROGRAMMABLE IN FREQUENCY (MCLK/4 ...

Page 5

... Industrial (A Version –40°C to +85°C Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C Maximum Junction Temperature . . . . . . . . . . . . . . . . . 150°C Model AD73360LAR CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD73360L features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high-energy electrostatic discharges ...

Page 6

AD73360L Pin No. Mnemonic Function 1 VINP2 Analog Input to the Positive Terminal of Input Channel 2. 2 VINN2 Analog Input to the Negative Terminal of Input Channel 2. 3 VINP1 Analog Input to the Positive Terminal of Input Channel ...

Page 7

TERMINOLOGY Absolute Gain Absolute gain is a measure of converter gain for a known signal. Absolute gain is measured (differentially) with a 1 kHz sine wave at 0 dBm0 for each ADC. The absolute gain specification is used for gain ...

Page 8

AD73360L FUNCTIONAL DESCRIPTION General Description The AD73360L is a six-input channel, 16-bit, analog front end. It comprises six independent encoder channels each featuring signal conditioning, programmable gain amplifier, sigma-delta A/D converter and decimator sections. Each of these sections is described ...

Page 9

Figure 7 shows the various stages of filtering that are employed in a typical AD73360L application. In Figure 7a we see the trans- fer function of the external analog antialias filter. Even though single RC pole, its ...

Page 10

AD73360L Voltage Reference The AD73360L reference, REFCAP bandgap reference that provides a low noise, temperature-compensated reference to the ADC. A buffered version of the reference is also made available on the REFOUT pin and can be used to ...

Page 11

Address (Binary) Name 000 CRA 001 CRB 010 CRC 011 CRD 100 CRE 101 CRF 110 CRG 111 CRH DEVICE ADDRESSS C/D R/W Control Frame Description Bit 15 Control/Data When set high, it signifies a ...

Page 12

AD73360L CONTROL REGISTER Bit Name 0 DR0 1 DR1 2 SCD0 3 SCD1 4 MCD0 5 MCD1 6 MCD2 7 CEE CONTROL REGISTER C 7 RES Bit Name 0 GPU 1 Reserved 2 Reserved 3 ...

Page 13

CONTROL REGISTER E 7 PUI4 Bit Name CONTROL REGISTER F 7 PUI6 Bit Name CONTROL REGISTER G 7 SEEN Bit Name ...

Page 14

AD73360L CONTROL REGISTER H 7 INV Bit Name 0 CH1 1 CH2 2 CH3 3 CH4 4 CH5 5 CH6 6 TME 7 INV REGISTER BIT DESCRIPTIONS Control Register A CRA:0 Data/Program Mode. This bit controls the operating mode of ...

Page 15

Control Register F CRF:0–2 Input Gain Selection. These bits select the input gain for ADC5. See Table II. CRF:3 Power Control for ADC5 this bit powers up ADC5. CRF:4–6 Input Gain Selection. These bits select the input ...

Page 16

AD73360L Decimation Rate Divider The AD73360L features a programmable decimation rate divider that allows users flexibility in matching the AD73360L’s ADC sample rates to the needs of the DSP software. The maximum sample rate available is DMCLK/256 and the other ...

Page 17

Refer to Table VII for details of the settings of CRC. CRD–CRF can be used to control the power status of individual channels allowing ...

Page 18

AD73360L SDIFS TFS DT ADSP-21xx SCLK SCLK DSP DR SDO RFS SDOFS SDIFS TFS DT ADSP-21xx SCLK SCLK DSP DR SDO RFS SDOFS The second configuration (shown in Figure 12) has the DSP’s Tx data and Rx data connected to ...

Page 19

SE SCLK SDOFS UNDEFINED DATA SDO SDIFS SDI CONTROL WORD SE SCLK SDOFS SDO UNDEFINED DATA SDIFS SDI REGISTER READ INSTRUCTION SE SCLK SDOFS SDO CHANNEL 1 ADC SAMPLE WORD SDIFS SDI CONTROL WORD SE SCLK SDOFS SDO CHANNEL 1 ...

Page 20

AD73360L Cascade Operation The AD73360L has been designed to support two devices in a cascade connected to a single serial port (see Figure 17). The SPORT interface protocol has been designed so that device addressing is built into the packet ...

Page 21

SE SIGNAL SYNCHRONIZED DSP CONTROL TO MCLK 1/2 74HC74 MCLK CLK RESET SIGNAL SYNCHRONIZED DSP CONTROL TO MCLK TO RESET D Q 1/2 74HC74 MCLK CLK RESET PERFORMANCE As the AD73360L is designed to provide high-performance, ...

Page 22

AD73360L Figure 23 shows a comparison of SNR results achieved by vary- ing either the Decimation Rate Setting or the DMCLK Rate Settings. 81 DMCLK = MCLK ...

Page 23

Digital Interface As there are a number of variations of sample rate and clock speeds that can be used with the AD73360L in a particular appli- cation important to select the best combination to achieve the desired performance. ...

Page 24

AD73360L DSP SPORT Interrupts If SPORT interrupts are enabled important to note that the active signals on the frame sync pins do not necessarily corre- spond with the positions in time of where SPORT interrupts are generated. On ...

Page 25

Programming a Single AD73360L for Data Mode Operation This section describes a typical sequence in programming a single AD73360L to operate in normal Data Mode. It details the control (program) words that are sent to the device to con- figure ...

Page 26

AD73360L Programming a Single AD73360L for Mixed Mode Operation This section describes a typical sequence in programming a single AD73360L to operate in Mixed Mode. The device is configured in Nonframe Sync Loop-Back (see Figure 11), which allows the DSP’s ...

Page 27

Configuring a Cascade of Two AD73360Ls to Operate in Data Mode This section describes a typical sequence of control words that would be sent to a cascade of two AD73360Ls to set them up for operation not intended ...

Page 28

AD73360L DSP Tx REG CONTROL WORD 1 1000 1001 0000 0011 STEP 1 DSP Tx REG CONTROL WORD 1 1000 0001 0000 0011 STEP 2 DSP Tx REG CONTROL WORD 2 1000 1010 1110 0001 STEP 3 DSP Tx REG ...

Page 29

Configuring a Cascade of Two AD73360Ls to Operate in Mixed Mode This section describes a typical sequence of control words that would be sent to a cascade of two AD73360Ls to configure them for operation in Mixed Mode ...

Page 30

AD73360L DSP Tx REG CONTROL WORD 1 1000 1001 0000 0011 STEP 1 DSP Tx REG CONTROL WORD 2 1000 0001 0001 0011 STEP 2 DSP Tx REG CONTROL WORD 2 1000 0001 0001 0011 STEP 3 DSP Tx REG ...

Page 31

APPENDIX E HISTOGRAMS OF SNR RESULTS f = 8kHz 1kHz IN SCLK = 8MHz –83 –82 –81 –80 –79 –78 THD – 8kHz 1kHz IN SCLK = 8MHz 76 76.5 77 ...

Page 32

AD73360L Topic FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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