Datasheet

ADA4320-1
Rev. A | Page 3 of 16
SPECIFICATIONS
T
A
= 25°C, V
S
= 5 V, R
L
= 75 Ω, V
IN
(differential) = 29 dB mV sinusoidal, f = 5 MHz to 85 MHz, gain, V
OUT
(single-ended) measured at
output of Coilcraft PWB-4-BL transformer, unless otherwise noted.
Table 1.
Parameter Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Input Resistance Balanced (differential) input 640 Ω
Unbalanced (single-ended) input 320 Ω
Input Capacitance 2.0 pF
GAIN CONTROL Current Level 3
Gain Range 57.5 59 60 dB
Maximum Gain Gain Code 60 30.5 32 dB
Minimum Gain Gain Code 01 −27 −25.5 dB
Output Step Size 0.6 1.0 1.4 dB/LSB
OUTPUT CHARACTERISTICS
Gain Flatness Referenced to 10 MHz
At Maximum Gain f = 42 MHz, Gain Code 60, Current Level 3 −0.3 dB
f = 65 MHz, Gain Code 60, Current Level 3 −0.7 dB
f = 85 MHz, Gain Code 60, Current Level 3 −1.1 dB
At Minimum Gain f = 42 MHz, Gain Code 01, Current Level 0 −0.4 dB
f = 65 MHz, Gain Code 01, Current Level 0 −0.8 dB
f = 85 MHz, Gain Code 01, Current Level 0 −1.8 dB
1 dB Compression Point (P
1dB
) f = 10 MHz, Gain Code 60, Current Level 3, output referred 70 dB mV
Output Noise in 160 kHz Bandwidth f = 10 MHz, 294 Ω resistor across VIN+ and VIN− pins
At Maximum Gain Gain Code 60, Current Level 3, TXEN = high (1) −19 −20 dB mV
Gain Code 60, Current Level 0, TXEN = high (1) −20 −21 dB mV
At Minimum Gain Gain Code 01, Current Level 3, TXEN = high (1) −59 −60 dB mV
Gain Code 01, Current Level 0, TXEN = high (1) −60 −61 dB mV
Transmit Disabled TXEN = low (0) −68 −70 dB mV
Output Impedance (Measured at
Transformer Output)
TXEN = high (1) or TXEN = low (0) or SLEEP = low (0)
75 Ω
Output Return Loss (Measured at
Transformer Output)
f = 85 MHz
SLEEP
= high (1), TXEN = high (1)
12 dB
SLEEP
= high (1), TXEN = low (0)
11 dB
SLEEP
= low (0)
10 dB
OVERALL PERFORMANCE
Adjacent Channel Power Ratio (ACPR)
Single QPSK Channel
f = 5 MHz to 85 MHz, output level = 61 dB mV,
Gain Code 60, Current Level 3, channel width = 6.4 MHz,
adjacent channel width = 6.4 MHz
−66 dBc
4x QAM64 Channels
f = 5 MHz to 85 MHz, output level = 53 dB mV/channel,
Gain Code 60, Current Level 3, channel width = 1.6 MHz,
adjacent channel width = 1.6 MHz
−63 dBc
Output Third-Order Intercept Point (OIP3) f
1
= 84 MHz, f
2
= 85 MHz, Gain Code 60, Current Level 3 93 dB mV
f
1
= 84 MHz, f
2
= 85 MHz, Gain Code 60, Current Level 0 87 dB mV
Input-to-Output Isolation f = 85 MHz, Gain Code 60, TXEN = Low (0) 107 dB