AD8313ARM Analog Devices Inc, AD8313ARM Datasheet - Page 14

• Manufacturer Part Number: AD8313ARM
• Description: IC LOGARTIHMIC AMP 70DB 8-MSOP
• Manufacturer: Analog Devices Inc
• Type: Logarithmic Ampr

Specifications of AD8313ARM

• Rohs Status: RoHS non-compliant
• Frequency: 100MHz ~ 2.5GHz
• Rf Type: RADAR, 802.11/Wi-Fi, 8.2.16/WiMax, Wireless LAN
• Input Range: -65dBm ~ 0dBm
• Accuracy: ±1dB
• Voltage - Supply: 2.7 V ~ 5.5 V
• Current - Supply: 13.7mA
• Package / Case: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
• Number Of Channels: 1
• Number Of Elements: 8
• Power Supply Requirement: Single
• Voltage Gain Db: 84dB
• Input Resistance: 0.0009@5VMohm
• Input Bias Current: 10@5VnA
• Single Supply Voltage (typ): 3/5V
• Dual Supply Voltage (typ): Not RequiredV
• Power Dissipation: 200mW
• Rail/rail I/o Type: Rail to Rail Output
• Single Supply Voltage (min): 2.7V
• Single Supply Voltage (max): 5.5V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 8
• Package Type: MSOP
• Lead Free Status / RoHS Status: Not Compliant

AD8313
SETPOINT INTERFACE, VSET
The setpoint interface is shown in Figure 28. The voltage, V
divided by a factor of 3 in a resistive attenuator of 18 kΩ total
resistance. The signal is converted to a current by the action of
the op amp and the resistor R3 (1.5 kΩ), which balances the
current generated by the summed output of the nine detector
cells at the input to the previous cell. The logarithmic slope is
nominally 3 µs × 4.0 µA/dB × 1.5 kΩ = 18 mV/dB.
SET
Rev. D | Page 14 of 24
, is
COMM
VPOS
VSET
1
8
6
12kΩ
R1
Figure 28. Setpoint Interface Circuitry
6kΩ
R2
25µA
25µA
1.5kΩ
R3
TO O/P
STAGE
FDBK
LP