NE600 NXP Semiconductors, NE600 Datasheet - Page 11

• Manufacturer Part Number: NE600
• Description: 1GHz LNA and mixer
• Manufacturer: NXP Semiconductors

Philips Semiconductors
OVERALL PERFORMANCE: ISOLATION CHARACTERISTICS
4.5
SPECIFICATIONS
The goal of the Specifications section of the datasheet is to provide
information on the NE/SA600 in such a way that the designer can
estimate statistical variations, and can reproduce the
measurements. To this end the high frequency measurements are
specified with a particular PC board layout. Variations in board
layout will cause parameter variations (sensitive parameters are
discussed in the sections on the LNA and mixer below). For many
RF parameters the 3 sigma limits are specified. Statistically only
0.26% of the units will be outside these limits.
The LNA + mixer conversion gain is measured with an incident
900MHz signal and a 83MHZ SAW filter at the IF output. This
measurement along with a gain measurement of the LNA ensure the
correct operation of the chip and also allows a calculation of mixer
conversion gain.
PIN DESCRIPTIONS AND OPERATIONAL LIMITS
RF
Input of LNA, AC coupling required, DC = 0.78V, frequency range
from DC to 2GHz, gain at low frequencies is 40dB — so be careful
of overload, impedance below 50 , shunt 15-18nH inductor helps
input match and noise figure.
RF
Output of LNA, AC coupling required, DC = 1.27V, frequency range
from DC to 2GHz, impedance above 50 .
BYPASS
Bypass capacitor should be 100 times larger than the largest signal
coupling capacitor for the LNA, DC = 1.05V.
RF
Mixer RF port, AC coupling required, DC = 1.43V, frequency range
from 100MHz to 2.5GHz, impedance close to 50 resistive.
1993 Dec 15
1GHz LNA and mixer
INA
OUTA
INMX
V
www.datasheet4u.com
CC
= V
CCMX
–10
–20
–30
–40
–50
–60
0
800
5.5V, Test Fig. 1, unless otherwise specified
Isolation From LNA Output to Mixer
RF Input vs Frequency
900
FREQUENCY (MHz)
1000
Figure 10. Overall Performance: Isolation Characteristics
ENABLE=LO
ENABLE=HI
1100
1200
57
LO
Mixer LO port, AC coupling required, DC=3.35V, frequency range
from 100MHz to 2.5GHz, impedance close to 50 resistive.
IF
Mixer IF port, open-collector output with 1.6mA DC, frequency range
DC to 1GHz, impedance approximately 1pF capacitive.
Enable
TTL/CMOS compatible input. Bias current approximately zero.
CONVERSION GAIN DEFINITIONS
Referring to the figure above, we define the ratio of V
frequency) to V
Conversion Gain, or more simply Voltage Conversion Gain,
where V
peak-to-peak). The voltage output V
OUT
IN
VG
–10
–20
–30
–40
–50
–60
0
C
A
800
and V
At Mixer RF input
20 log
I
Isolation From LO vs Frequency
I
(at the RF frequency) to be the Available Voltage
are expressed in similar voltage units (such as
V
A
900
V
V
V
A
I
I
RF
FREQUENCY (MHz)
10 H
At LNA input – ENABLE = LO
At LNA input – ENABLE = HI
Figure 11.
1000
LO
R
L1
IF FILTER
A
is decreased by the IF Filter
1k
1100
R
L2
NE/SA600
V
Product specification
O
A
1200
(at the IF
SR00092
SR00091