AD7706BRZ Analog Devices Inc, AD7706BRZ Datasheet - Page 41
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AD7706BRZ
Manufacturer Part Number
AD7706BRZ
Description
IC,Data Acquisition Signal Conditioner,3-CHANNEL,16-BIT,CMOS,SOP,16PIN,PLASTIC
Manufacturer
Analog Devices Inc
Datasheet
1.AD7705BRUZ.pdf
(44 pages)
Specifications of AD7706BRZ
Number Of Bits
16
Sampling Rate (per Second)
500
Data Interface
DSP, MICROWIRE™, QSPI™, Serial, SPI™
Number Of Converters
1
Power Dissipation (max)
1mW
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (0.300", 7.50mm Width)
Number Of Elements
1
Resolution
16Bit
Architecture
Delta-Sigma
Sample Rate
0.5KSPS
Input Polarity
Unipolar/Bipolar
Input Type
Voltage
Differential Input
Yes
Power Supply Requirement
Single
Single Supply Voltage (typ)
3/5V
Single Supply Voltage (min)
2.7V
Single Supply Voltage (max)
5.25V
Dual Supply Voltage (typ)
Not RequiredV
Dual Supply Voltage (min)
Not RequiredV
Dual Supply Voltage (max)
Not RequiredV
Power Dissipation
1mW
Integral Nonlinearity Error
±0.003%FSR
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
16
Package Type
SOIC W
Input Signal Type
Pseudo-Differential
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
EVAL-AD7706EBZ - BOARD EVALUATION FOR AD7706
Lead Free Status / Rohs Status
Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD7706BRZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Company:
Part Number:
AD7706BRZ-REEL
Manufacturer:
TI/NSC
Quantity:
8 720
Part Number:
AD7706BRZ-REEL
Manufacturer:
ADI/亚德诺
Quantity:
20 000
BATTERY MONITORING
An application where the low power, single-supply operation is
required is battery monitoring in portable equipment applications.
Figure 29 shows a block diagram of a battery monitor using the
AD7705 and an external multiplexer to measure differentially
the voltage across a single cell.
The second channel on the AD7705 is used to monitor current
drain from the battery. The AD7705, with its dual-input
channel, is ideally suited for measurement systems requiring
two input channels, as in this case, to monitor voltage and
current.
DC BATTERY
CHARGING
SOURCE
GND
R
SENSE
VCELL 1
VCELL 2
VCELL 3
VCELL 4
Figure 29. Battery Monitoring Using the AD7705
VDIFF1
VDIFF2
VDIFF3
VDIFF4
Rev. C | Page 41 of 44
4-TO-1
DIFFERENTIAL
MULTIPLEXER
Because the AD7705 can accommodate very low input signals,
R
Operating with a gain of 128, a ±9.57 mV full-scale signal can
be measured with a resolution of 2 μV, giving 13.5 bits of flicker-
free performance in such a system.
To obtain specified performance in unbuffered mode, the
common-mode range of the input is GND to V
the absolute value of the analog input voltage lies between
GND − 100 mV and V
GND − 200 mV can be accommodated on the AD7705 at 25°C
without any degradation in performance, but with significantly
increased leakage at elevated temperatures.
AIN1(+)
AIN1(–)
AIN2(+)
AIN2(–)
SENSE
ON/OFF SWITCH
V
DD
can be kept low, reducing undesired power dissipation.
AD7705
REF IN(+)
REF IN(–)
1.225V
REF
3V
DD
REGULATORS
+ 30 mV. Absolute voltages of
VOLTAGE
LOAD
5V
AD7705/AD7706
DD
, provided that