(TA = 25ꢁC, VS = 5 V, RL = RIN = 75 ꢀ, VIN (Differential) = 29 dBmV.
The AD8328 is characterized using a 2:1 transformer1 at the device output.)
AD8328–SPECIFICATIONS
Parameter
Conditions
Min
Typ
Max Unit
INPUT CHARACTERISTICS
Specified AC Voltage
Input Resistance
Output = 60 dBmV, Max Gain
Single-Ended Input
Differential Input
29
dBmV
Ω
800
1600
2
Ω
Input Capacitance
pF
GAIN CONTROL INTERFACE
Voltage Gain Range
Max Gain
58
30.5
–28.5 –27.5
59.0
31.5
60
32.5
–26.5 dB
dB
dB
Gain Code = 60 Dec
Gain Code = 1 Dec
Min Gain
Output Step Size
Output Step Size Temperature
Coefficient
0.6
1.0
0.0005
1.4
dB/LSB
dB/°C
TA = –40°C to +85°C
OUTPUT CHARACTERISTICS
Bandwidth (–3 dB)
All Gain Codes (1–60 Decimal Codes)
f = 65 MHz
Max Gain, f = 10 MHz, Output Referred
Min Gain, f = 10 MHz, Input Referred
107
1.2
18.4
3.3
MHz
dB
dBm
dBm
Bandwidth Roll-Off
1 dB Compression Point2
17.9
2.2
Output Noise2
Max Gain
Min Gain
f = 10 MHz
f = 10 MHz
f = 10 MHz
135
1.2
1.1
151
1.3
1.2
nV/√Hz
nV/√Hz
nV/√Hz
Transmit Disable
Noise Figure2
Max Gain
Differential Output Impedance
f = 10 MHz
TX Enable and TX Disable
16.7
17.7
dB
Ω
75 30%3
OVERALL PERFORMANCE
Second-Order Harmonic Distortion4, 5
f = 33 MHz, VOUT = 60 dBmV @ Max Gain
f = 65 MHz, VOUT = 60 dBmV @ Max Gain
f = 21 MHz, VOUT = 60 dBmV @ Max Gain
f = 65 MHz, VOUT = 60 dBmV @ Max Gain
–67
–61
–57.5
–54
–58
–85
–56
–55
–56
–52.5 dBc
–56
–81
dBc
dBc
dBc
Third-Order Harmonic Distortion4, 5
ACPR2, 6
dBc
dB
Isolation (Transmit Disable)2
Max Gain, f = 65 MHz
POWER CONTROL
TX Enable Settling Time
TX Disable Settling Time
Output Switching Transients2
Max Gain, VIN = 0
Max Gain, VIN = 0
Equivalent Output = 31 dBmV
Equivalent Output = 61 dBmV
2.5
3.8
2.5
16
µs
µs
6
54
mV p-p
mV p-p
Output Settling
Due to Gain Change
Due to Input Step Change
Min to Max Gain
Max Gain, VIN = 29 dBmV
60
30
ns
ns
POWER SUPPLY
Operating Range
Quiescent Current
4.75
98
18
1
5
5.25
140
34
3.5
100
V
Max Gain
Min Gain
Transmit Disable (TXEN = 0)
SLEEP Mode (Power-Down)
120
26
2.6
20
mA
mA
mA
µA
1
OPERATING TEMPERATURE
RANGE
–40
+85
°C
NOTES
1TOKO 458PT-1087 used for above specifications. Typical insertion loss of 0.3 dB @ 10 MHz.
2Guaranteed by design and characterization to 4 sigma for TA = 25°C.
3Measured through a 2:1 transformer.
4Specification is worst case over all gain codes.
5Guaranteed by design and characterization to 3 sigma for TA = 25°C.
6VIN = 29 dBmV, QPSK modulation, 160 KSPS symbol rate.
–2–
REV. 0