AD7783BRUZ Analog Devices Inc, AD7783BRUZ Datasheet

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AD7783BRUZ

Manufacturer Part Number
AD7783BRUZ
Description
IC ADC 24BIT SGL R-R 16-TSSOP
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD7783BRUZ

Data Interface
DSP, MICROWIRE™, QSPI™, Serial, SPI™
Number Of Bits
24
Sampling Rate (per Second)
19.79
Number Of Converters
1
Power Dissipation (max)
3.9mW
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-TSSOP (0.173", 4.40mm Width)
Resolution (bits)
24bit
Input Channel Type
Differential
Supply Voltage Range - Analogue
2.7V To 3.6V, 4.75V To 5.25V
Supply Current
1.7mA
No. Of Pins
16
Sampling Rate
19.79Hz
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD7783BRUZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
GENERAL DESCRIPTION
The AD7783 is a complete analog front end for low frequency
measurement applications. The 24-bit sigma-delta ADC con-
tains one fully differential input channel that can be configured
with a gain of 1 or 16 allowing full-scale input signal ranges of
± 2.56 V or ± 160 mV from a +2.5 V differential reference input.
It also contains two 200 mA integrated current sources.
The AD7783 has an extremely simple, read-only digital inter-
face that can be operated in master mode or slave mode.
There are no on-chip registers to be programmed. The input
signal range and current source selection are configured using
two external pins.
REV. B
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
FEATURES
Single-Channel, 24-Bit - ADC
Pin Configurable (No Programmable Registers)
Fixed 19.79 Hz Update Rate
Simultaneous 50 Hz and 60 Hz Rejection
24-Bit No Missing Codes
18.5-Bit p-p Resolution (±2.56 V Range)
16.5-Bit p-p Resolution (±160 mV Range)
INTERFACE
Master or Slave Mode of Operation
Slave Mode
POWER
Specified for Single 3 V and 5 V Operation
Normal: 1.3 mA @ 3 V
Power-Down: 9 A
ON-CHIP FUNCTIONS
Rail-to-Rail Input Buffer and PGA
APPLICATIONS
Sensor Measurement
Industrial Process Control
Temperature Measurement
Pressure Measurement
Weigh Scales
Portable Instrumentation
ISOURCE Select ™
Pin Programmable Input Ranges (±2.56 V or ±160 mV)
3-Wire Serial
SPI
Schmitt Trigger on SCLK
®
, QSPI™, MICROWIRE™, and DSP-Compatible
Read-Only, Pin Configured 24-Bit - ADC
The device operates from a 32.768 kHz crystal with an on-chip
PLL generating the required internal operating frequency. The
output data rate from the part is fixed via the master clock at
19.79 Hz and provides simultaneous 50 Hz and 60 Hz rejection
at this update rate. At this update rate, 18-bit p-p resolution can
be obtained.
The part operates from a single 3 V or 5 V supply. When oper-
ating from 3 V supplies, the power dissipation for the part is
3.9 mW. The AD7783 is available in a 16-lead TSSOP.
Another part in the AD778x family is the AD7782. It is similar
to the AD7783 except it has no integrated current sources and
two differential input channels.
with Excitation Current Sources
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
AIN(+)
IOUT1
IOUT2
AIN(–)
IPIN
REFERENCE
SOURCES
MUX
CURRENT
V
ANALOG
AD7783
DD
FUNCTIONAL BLOCK DIAGRAM
INPUT
INPUT
BASIC CONNECTION DIAGRAM
200 A
IEXC1
BUF
© 2004 Analog Devices, Inc. All rights reserved.
GND
V
DD
AIN(+)
AIN(–)
IOUT1
IOUT2
REFIN(+)
REFIN(–)
RANGE
POWER SUPPLY
PGA
IEXC2
200 A
AD7783
GND
V
REFIN(+)
DD
DOUT/RDY
24-BIT -
ADC
XTAL1
XTAL2
SCLK
REFIN(–)
CS
OSCILLATOR
XTAL1 XTAL2
INTERFACE
AD7783
CONTROL
32.768kHz
CRYSTAL
SERIAL
DIGITAL
INTERFACE
LOGIC
AND
AND
PLL
www.analog.com
DOUT/RDY
SCLK
MODE
CS

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AD7783BRUZ Summary of contents

Page 1

FEATURES Single-Channel, 24-Bit - ADC Pin Configurable (No Programmable Registers) ISOURCE Select ™ Pin Programmable Input Ranges (±2. ±160 mV) Fixed 19.79 Hz Update Rate Simultaneous 50 Hz and 60 Hz Rejection 24-Bit No Missing Codes 18.5-Bit p-p ...

Page 2

AD7783–SPECIFICATIONS GND = 0 V; XTAL1/XTAL2 = 32.768 kHz Crystal; all specifications T Parameter ADC CHANNEL SPECIFICATION Output Update Rate ADC CHANNEL 2 No Missing Codes Resolution Output Noise Integral Nonlinearity Offset Error Offset Error Drift versus Temperature Full-Scale Error ...

Page 3

Parameter LOGIC INPUTS All Inputs Except SCLK and XTAL1 V , Input Low Voltage INL V , Input High Voltage INH SCLK Only (Schmitt-Triggered Input) V T(+) V T(–) V – V T(+) T(–) V T(+) V T(–) V – ...

Page 4

AD7783 TIMING CHARACTERISTICS Input Logic Logic unless otherwise noted.) DD Limit at T Parameter (B Version) t 30.5176 1 t 50.54 ADC ¥ ...

Page 5

CS ( DOUT/RDY (O) SLAVE MODE SCLK (I) MASTER MODE SCLK ( INPUT TO AD7783, AND O = OUTPUT FROM AD7783. SLAVE MODE IS SELECTED BY TYING THE MODE PIN LOW, WHILE MASTER MODE ...

Page 6

AD7783 Pin No. Mnemonic Function 1 XTAL1 Input to the 32.768 kHz Crystal Oscillator Inverter. 2 REFIN(+) Positive Reference Input. REFIN(+) can lie anywhere between V ence voltage (REFIN(+) – REFIN(–)) is 2.5 V, but the part functions with a ...

Page 7

TPC 1. Noise Distribution Histogram ADC CIRCUIT INFORMATION Overview The AD7783 incorporates a S-D ADC channel, on-chip pro- grammable gain amplifier, and on-chip digital filtering intended for the measurement of ...

Page 8

AD7783 NOISE PERFORMANCE Table I shows the output rms noise and output peak-to-peak resolution in bits (rounded to the nearest 0.5 LSB) for the two input voltage ranges. The numbers are typical and are generated at a differential input voltage ...

Page 9

AIN(–) input. For example, if AIN(–) is 2.5 V and the AD7783 is configured for an analog input range of ± 160 mV, the analog input range on the AIN(+) input is 2. ...

Page 10

AD7783 0.15 0.05 OUTLINE DIMENSIONS 16-Lead Thin Shrink Small Outline Package [TSSOP] (RU-16) Dimensions shown in millimeters 5.10 5.00 4. 4.50 6.40 4.40 BSC 4. PIN 1 1.20 MAX 0.20 0.09 8 0.30 0 0.65 0.19 ...

Page 11

Revision History Location 8/04—Data Sheet Changed from REV REV. B. Change to FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 12

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