AD8318ACPZ-REEL7 Analog Devices Inc, AD8318ACPZ-REEL7 Datasheet - Page 21

IC, LOGARITHMIC AMP, 12NS, LFCSP-16

AD8318ACPZ-REEL7

Manufacturer Part Number
AD8318ACPZ-REEL7
Description
IC, LOGARITHMIC AMP, 12NS, LFCSP-16
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD8318ACPZ-REEL7

No. Of Amplifiers
1
Dynamic Range, Decades
70
Response Time
12ns
Supply Voltage Range
4.5V To 5.5V
Amplifier Case Style
LFCSP
No. Of Pins
16
Supply Current
68mA
Design Resources
Stable, Closed-Loop Automatic Power Control for RF Appls (CN0050) Software Calibrated, 1 MHz to 8 GHz, 70 dB RF Power Measurement System Using AD8318 (CN0150)
Frequency
1MHz ~ 8GHz
Rf Type
RADAR, 802.11/Wi-Fi, 8.2.16/WiMax, Wireless LAN
Input Range
-60dBm ~ -2dBm
Accuracy
±1dB
Voltage - Supply
4.5 V ~ 5.5 V
Current - Supply
68mA
Package / Case
16-VQFN, CSP Exposed Pad
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
AD8318ACPZ-REEL7
AD8318ACPZ-REEL7TR

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD8318ACPZ-REEL7
Manufacturer:
FREESCALE
Quantity:
101
CHARACTERIZATION SETUP AND METHODS
The general hardware configuration used for the AD8318
characterization is shown in Figure 47. The primary setup used
for characterization is measurement mode. The characterization
board is similar to the customer evaluation board with the
exception that the RF input has a Rosenberger SMA connector
and R10 has changed to a 1 kΩ resistor to remove cable
capacitance from the bench characterization setup. Slope and
intercept are calculated in this data sheet and in the production
environment using linear regression from −50 dBm to −10 dBm.
The slope and intercept generate an ideal line. Log conformance
error is the difference from the ideal line and the measured
output voltage for a given temperature in dB. For additional
information on the error calculation, refer to the Device
Calibration and Error Calculation section.
The hardware configuration for pulse response measurement
replaces the 0 Ω series resistor at the VOUT pin with a 40 Ω
resistor; the CLPF pin remains open. Pulse response time is
measured using a Tektronix TDS5104 digital phosphor
oscilloscope. Both channels on the scope are configured for
50 Ω termination. The 10 Ω internal series resistance at VOUT,
combined with the 40 Ω resistor, attenuates the output voltage
level by two. RF input frequency is set to 100 MHz with
−10 dBm at the input of the device. The RF burst is generated
using a Rohde & Schwarz SMT06 with the pulse option with a
period of 1.5 μs, a width of 0.1 μs, and a pulse delay of 0.04 μs.
The output response is triggered using the video output from
the SMT06. Refer to Figure 47 for an overview of the test setup.
ROHDE & SCHWARZ
VIDEO
OUT
SMT06
RF OUT
–7dBm
3dB
SPLITTER
Figure 47. Pulse Response Measurement Test Setup
52.3Ω
1nF
1nF
Rev. B | Page 21 of 24
INHI
INLO
AD8318
VPOS
GND
5V
VOUT
VSET
To measure noise spectral density, the 0 Ω resistor in series with
the VOUT pin is replaced with a 1 μF dc blocking capacitor.
The capacitor is used because the Rohde & Schwarz FSEA
spectrum analyzer cannot handle dc voltages at its RF input.
The CLPF pin is left open for data collected for Figure 19. For
Figure 20, a 1 μF capacitor is placed between CLPF and ground.
The large capacitor filters the noise from the detector stages
of the log amp. Noise spectral density measurements are taken
using the FSEA spectrum analyzer and the SMT06 signal
generator. The signal generator frequency is set to 2.2 GHz.
The spectrum analyzer has a span of 10 Hz, resolution
bandwidth of 50 Hz, video bandwidth of 50 Hz, and averages
the signal 100×. Data is adjusted to account for the dc blocking
capacitor impedance on the output at lower frequencies.
40Ω
CH1* CH3* TRIGGER
TEKTRONIX
TDS5104
*50Ω
TERMINATION
AD8318

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