CONTROL IC. NJM2287 Datasheet

NJM2287 IC. Datasheet pdf. Equivalent

NJM2287 Datasheet
Recommendation NJM2287 Datasheet
Part NJM2287
Description 100MHz INPUT MIXER AND 450kHz IF GAIN CONTROL IC
Feature NJM2287; NJM2287 100MHz INPUT MIXER AND 450kHz IF GAIN CONTROL IC GENERAL DESCRIPTION The NJM2287 is an IF .
Manufacture New Japan Radio
Datasheet
Download NJM2287 Datasheet




New Japan Radio NJM2287
NJM2287
100MHz INPUT MIXER AND 450kHz IF GAIN CONTROL IC
GENERAL DESCRIPTION
The NJM2287 is an IF Gain Control IC with 450kHz (standard) IF input,
which operates from 2.7V to 5.5V supply. It includes a local-buffer, mixer,
IF gain control amplifier, and RSSI circuit.
The NJM2287 is especially designed for digital transceivers with built-in
an analog gain control amplifier and a subsequent analog to digital converter
circuit.
The useful functions of the NJM2287 are rail-to-rail output swing of 3Vpp
@3.3V and wide gain control of over 80dB. These features help streamline
the subsequent circuit design.
FEATURES
Operating Voltage
Low Operating Current
Maximum Mixer Input Frequency
IF Frequency
Wide IF Gain Control Range
Rail - to - rail Output
Wide Range RSSI
Bipolar Technology
Package Outline
2.7V to 5.5V
4.7mA @V+ = 3.3V, no signal
100MHz (reference value)
450kHz (standard)
over 80dB
3Vp-p @V+ = 3.3V
over 70dB (linear area)
SSOP14
BLOCK DIAGRAM
PACKAGE OUTLINE
NJM2287V (SSOP14)
LO DEC LO IN
14 13
V+1
12
V+2 RSSI IF OUT GC IN
11 10
9
8
MIX IF
MIX IF
12
RF DEC RF IN
345
GND1 MIX OUT GND2
6
IF IN
7
IF DEC
No. Symbol
1 RF DEC
2 RF IN
3 GND1
4 MIX OUT
5 GND2
6 IF IN
7 IF DEC
8 GC IN
9 IF OUT
10 RSSI
11 V+2
12 V+1
13 LO IN
14 LO DEC
Description
Mixer Decoupling
Mixer Input
Mixer Ground
Mixer Output
IF Ground
IF Limiter
Amplifier Input
IF Decoupling
Gain Control
Voltage Input
FM IF Output
RSSI Output
Supply Voltage
for IF
Supply Voltage
for Mixer
Local Input
Local Decoupling
Ver.2013-07-18
-1-



New Japan Radio NJM2287
NJM2287
REFERENCE
Representative Block Diagram
RSSI IF Signal
Output Output
Local Signal
44.55MHz
51
1000p 1000p
V+1 V+2
1u 1000p 1u 1000p
1000p
3k
0.1u
Gain
Control
1u 1000p
14 13 12 11 10
MIX IF
9
8
MIXER
IF
123
1000p 1000p
RF Signal
45MHz
51
4567
0.1u
1.2k
IF Signal
450kHz
IF filter
(BPF)
0.1u
1.5k
0.1u
Simplified Application Block Diagram
RF
Amp
(IF Signal)
SAW
Filter
Mixer
MCF
RF
Signal
Local
Signal
PLL Synthesizer
Local
Signal
NJM2287
RSSI
Output
IF Signal
Gain
Control
uCom
/
DSP
Ver.2013-07-18
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New Japan Radio NJM2287
Symbols related to Electrical Characteristics
NJM2287
SYMBOL
IccqMIX
IccqIF
Icont1
Icont2
FI MIX
CG
P1 MIX
IIP3
NO MIX
PI LO
RIMIX
RILO
ROMNIX
FI IF
G IF1 (to 4)
PI IF
NO IF
PO IF
RIIF
VRSSI1(to3)
GCR
GCS
DESCRIBTION
Current consumption 1
The current passing through pin12 (V+1) when V+1 is supplied to pin 12. No input signal.
Current consumption 2
The current passing through pin11 (V+2) when V+2 is supplied to pin 11. No input signal.
Supply current 1 at GC IN / GC IN supply current 1
The current passing through pin8 (GC IN) when the voltage at pin8 is 0V.
Supply current 2 at GC IN / GC IN supply current 2
The current passing through pin8 (GC IN) when the voltage at pin8 is 2V.
Mixer input frequency at RF IN / RF IN input frequency
The suitable frequency range of RF input signal at pin2 (RF IN). At this frequency range, the output
signal at pin4 satisfies the gain flatness of within ±3dB.
Mixer Conversion Gain
The difference between the output signal level at pin4 and the input signal level at pin2
Mixer input 1dB compression point
The RF input signal level at 1dB compression point.
Mixer 3rd order intercept point
The RF signal level at 3rd order interrupt point, where FIMIX1=45MHz, FIMIX2=FIMIX1-6.25kHz
Noise level at MIX OUT / MIX OUT noise level
The noise level at pin4 (MIX OUT) within the frequency range from 450-3.125kHz to
450+3.125kHz Note: This range means the center frequency is 450kHz and the BW is 6.25kHz.
Input level at LO IN / LO IN input level
The suitable level of local input signal at pin13 (LO IN). At this frequency range, the output signal at
pin4 (MIX OUT) satisfies the gain flatness of within ±3dB.
Input resistance at RF IN / RF IN input resistance
The resistance between pin 1 (RF DEC) and pin2 (RF IN)
Input resistance at LO IN / LO IN input resistance
The resistance between pin13 (LO IN) and pin14 (LO DEC)
Output resistance at MIX OUT / MIX output resistance
The AC resistance at pin 4(MIX OUT) within the range from 450-3.125kHz to 450+3.125kHz
Input frequency at IF IN / IF IN input frequency
The suitable frequency range of IF input signal at pin6 (IF IN). At this frequency range, the output
signal level at pin9 (IF OUT) is satisfied with the gain flatness of within ±3dB.
IF gain at each of the different GC IN voltage.
IF Input 1dB Compression point
The IF input signal level at 1dB compression point.
Noise level at IF OUT / IF OUT noise level
The noise level at pin9 (IF OUT) within the range from 450-3.125kHz to 450+3.125kHz
Maximum output voltage at IF OUT / IF OUT maximum output voltage
The maximum output level at pin9 (IF OUT) when input level at pin6 is 30dBuV.
Input resistance at IF IN / IF IN input resistance
The resistance between pin 6 (IF IN) and pin9 (IF OUT).
RSSI output
The RSSI output level at different IF IN input level
Gain control range
The range of IF gain change with GC IN voltage.
Gain scaling
The ratio of IF gain change with GC IN voltage
Ver.2013-07-18
-3-







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