AD5933YRSZ Analog Devices Inc, AD5933YRSZ Datasheet - Page 35

• Manufacturer Part Number: AD5933YRSZ
• Description: IC NTWK ANALYZER 12B 1MSP 16SSOP
• Manufacturer: Analog Devices Inc

Specifications of AD5933YRSZ

• Resolution (bits): 12 b
• Master Fclk: 16.776MHz
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP
• Supply Voltage Range: 2.7V To 5.5V
• Operating Temperature Range: -40°C To +125°C
• Digital Ic Case Style: SSOP
• No. Of Pins: 16
• Frequency Max: 0.1MHz
• Termination Type: SMD
• Pin Count: 16
• Screening Level: Automotive
• Package Type: SSOP
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Communication Function: Network Analyzer
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: EVAL-AD5933EBZ - BOARD EVALUATION FOR AD5933
• Tuning Word Width (bits): -
• Lead Free Status / Rohs Status: Compliant
• Other names: AD5933BRSZ; Q2204656A

CHOOSING A REFERENCE FOR THE AD5933
To achieve the best performance from the AD5933, carefully
choose the precision voltage reference. The AD5933 has three
reference inputs: AVDD1, AVDD2, and DVDD. It is recom-
mended that the voltage on these reference inputs be run from
the same voltage supply.
There are four sources of error that should be considered when
choosing a voltage reference for high accuracy applications:
initial accuracy, ppm drift, long-term drift, and output voltage
noise. To minimize these errors, a reference with high initial
accuracy is preferred. Also, choosing a reference with an output
trim adjustment, such as a device in the ADR43x family, allows
a system designer to trim system errors by setting a reference
voltage to a voltage other than the nominal. The trim adjust-
ment can also be used at temperature to trim out any error.
Because the supply current required by the AD5933 is
extremely low, the parts are ideal for low supply applications.
The
Table 18. List of Precision References for the AD5933
Part No.
ADR433B
ADR433A
ADR434B
ADR434A
ADR435B
ADR435A
ADR439B
ADR439A
ADR395
voltage reference is recommended in this case.
Initial Accuracy (mV max)
±1.5
±4
±1.5
±5
±2
±6
±2
±5.5
Output Voltage (V)
3. 0
3. 0
4. 096
4. 096
5.0
5.0
4.5
4.5
Rev. C | Page 35 of 44
Temp. Drift (ppm/°C Max)
3
10
3
10
3
10
3
10
The ADR395 requires less than 100 μA of quiescent current.
It also provides very good noise performance at 8 μV p-p in the
0.1 Hz to 10 Hz range.
Long-term drift is a measure of how much the reference drifts
over time. A reference with a tight long-term drift specification
ensures that the overall solution remains stable during its entire
lifetime. A reference with a tight temperature coefficient speci-
fication should be chosen to reduce the temperature dependence
of the system output voltage on ambient conditions.
In high accuracy applications, which have a relatively low noise
budget, reference output voltage noise needs to be considered.
Choosing a reference with as low an output noise voltage as
practical for the system noise resolution required is important.
Precision voltage references such as the
output noise in the 0.1 Hz to 10 Hz range. Examples of some
recommended precision references for use as supplies to the
AD5933 are shown in Table 18.
0.1 Hz to 10 Hz Noise (μV p-p Typ)
3.75
3.75
6.25
6.25
8
8
7.5
7.5
ADR433
produce low
AD5933