AD8364-EVAL Analog Devices, AD8364-EVAL Datasheet - Page 10

• Manufacturer Part Number: AD8364-EVAL
• Description: LF to 2.7GHz, Dual 60dB TruPwr Detector
• Manufacturer: Analog Devices

Pin
1
2,23
3, 22, 29
4, 5
6
7
8, 17
9
10
11
12
13
14
15
16
18, 20
21,25,32
19
24
26, 27
28
30, 31
Under
Package
PRELIMINARY TECHNICAL DATA
PIN CONFIGURATION AND FUNCTIONAL DESCRIPTIONS
Name
CHPB
DECA, DECB
COMB, COMA
COMR
ADJB, ADJA
VREF
VLVL
CLPB, CLPA
VSTB
OUTB
FBKB
OUTN
OUTP
FBKA
OUTA
VSTA
ACMA, ACMB
VPSR, VPSA
VPSB
TEMP
CHPA
INHA, INLA
PWDN
INLB, INHB
Exposed
Paddle
Description
Connect to common via a capacitor to determine 3 dB point of Channel B input signal high-pass filter.
Decoupling terminals for INHA/INLA and INHB/INLB. Connect to common via a large
capacitance to complete input circuit.
Input system common connection. Connect via low impedance to system common.
Temperature compensation for Channel B and Channel A. An external voltage is connected to these
pins to improve temperature drift. This voltage can be derived from Vref, that is, connect a resistor
from Vref to ADJ[A,B] and another resistor from ADJ[A,B] to ground. The value of these resistors will
change with frequency.
General-purpose reference voltage output of 2.5V.
Reference level input for OUTP and OUTN. (Usually connected to VREF through a voltage divider or
left open).
Channel B and Channel A connection for loop filter integration (averaging) capacitor. Connect a
ground-referenced capacitor to this pin. A resistor can be connected in series with this capacitor to
improve loop stability and response time.
The voltage applied to this pin sets the decibel value of the required RF input voltage to Channel B that
results in zero current out of the loop integrating capacitor pin, CLPB.
Channel B output of error amplifier. In measurement mode, normally connected directly to VSTB.
Feedback through 1KΩ to the negative terminal of the integrated op-amp driving OUTN.
Output of differencing op-amp. In measurement mode, normally connected directly to FBKB.
Output of differencing op-amp. In measurement mode, normally connected directly to FBKA.
Feedback through 1KΩ to the negative terminal of the integrated op-amp driving OUTP.
Channel A output of error amplifier. In measurement mode, normally connected directly to VSTA.
The voltage applied to this pin sets the decibel value of the required RF input voltage to Channel A
that results in zero current out of the loop integrating capacitor pin, CLPA.
Analog common for channel A &B. Connect via low impedance to common.
Supply for the input system of channel A & B. Supply for the internal references. Connect to +5 V
power supply.
Temperature sensor output.
Connect to common via a capacitor to determine 3 dB point of Channel A input signal high-pass filter.
Channel A “High” and “Low” RF signal input terminal.
Disable/Enable control input. Apply logic high voltage to shut AD8364 down.
Channel B “Low” and “High” RF signal input terminal.
The exposed paddle on the under side of the package should be soldered to a low thermal and
electrical impedance ground plane.
PWD N
VPSA
COMR
VPSB
INHA
INHB
INL A
INLB
Table 3. Pin Function Descriptions
2
2
3
2
2
3
3
25
6
7
8
9
2
0
1
CHPB
CHPA
24
1
TruPwr™
TruPwr™
D ECB
Channel B
Channel A
DECA
Figure 2. AD8364 Pinout
Rev. PrC Ι Page 10 of 23
23
2
COMB ADJB ADJA VR EF VLVL CL PB
COMA VPSR ACMB TEMP ACMA CLPA
22
3
OUT A
OUT B
BIAS
21
4
20
5
V2I
TEMP
19
6
18
7
V2I
17
8
16
15
14
13
12
11
10
9
OUTA
OUTN
OUTB
VSTA
FBKA
OUT P
FBKB
VSTB
AD8364
Equiv.
Circuit
Circuit A
Circuit A