|
|
|
MAX2323 Schematic ( PDF Datasheet ) - Maxim Integrated
| Teilenummer | MAX2323 |
|
| Beschreibung | Triple/Dual-Mode CDMA LNA/Mixers | |
| Hersteller | Maxim Integrated | |
| Logo |  |
|
Gesamt 14 Seiten 
19-1736; Rev 0; 7/00
Triple/Dual-Mode
CDMA LNA/Mixers
________________General Description
The MAX2323/MAX2325 are low-noise amplifier (LNA)
plus mixer ICs optimized for code-division multiple-access
(CDMA) applications in both cellular and PCS bands. The
MAX2323 addresses dual-band, triple-mode CDMA appli-
cations by providing switched signal paths for cellular FM,
cellular CDMA, and PCS CDMA. The MAX2325 is a cellu-
lar-band dual-mode version.
To optimize cellular-band dynamic range at minimum cur-
rent, the MAX2323/MAX2325 implement four LNA states:
high gain/high linearity, high gain/low linearity, midgain,
and low gain. In high-gain/high-linearity mode, the
adjustable high-intercept LNA minimizes desensitization in
the presence of a large interfering signal. For the other
gain states, the LNA current is reduced to improve stand-
by time.
The CDMA mixers are designed for high linearity, low
noise, and differential IF outputs, while the FM mixer is
designed for lower current and single-ended output. Each
band is implemented with a separate mixer to optimize
performance for the specific band.
The MAX2323/MAX2325 can also be used in TDMA,
EDGE, and W-CDMA phones.
____________________________Features
o 2.7V Operation
o Dual Band, Triple Mode
o Three LNA Gain Settings (Cellular)
o Two LNA Gain Settings (PCS)
o 18mA in Low-Gain Mode
19.5mA in Paging and Midgain Mode
26.5mA in High-Gain, High-Linearity Mode
16.5mA in FM Mode, High-Gain, Low-Linearity
Mode
o 2.5dB (typ) Cascade Noise Figure
o Adjustable LNA IIP3, +5dBm to +13dBm
o Ultra-Small 28-Pin Package (5mm x 5mm)
Ordering Information
PART
MAX2323EGI
MAX2325EGI
MAX2323EVKIT
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN- PACKAGE
28 QFN
28 QFN
28 QFN
________________________Applications
Dual-Band, Triple-Mode PCS/Cellular Phones
Dual-Mode Cellular Phones
Typical Application Circuits appear at end of data sheet.
TOP VIEW
Pin Configuration/
Functional Diagram
28 27 26 25 24 23 22
RLNA 1
PLNAIN 2
GND 3
CLNAIN 4
SLEEP 5
G2 6
G1 7
MAX2323
21 RBIAS
20 CDMA+
19 CDMA-
18 GND
17 BAND
16 VCC
15 FMOUT
8 9 10 11 12 13 14
QFN
________________________________________________________________ Maxim Integrated Products 1
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
 
Triple/Dual-Mode
CDMA LNA/Mixers
Pin Description (continued)
MAX2323 MAX2325
NAME
FUNCTION
28
28
CLNAOUT
Low-Band LNA Output Port. This port requires an external pull-up inductor and series
capacitor as part of the matching network.
Slug
Slug
GND
Ground
Table 1. MAX2323 Operational Modes
FUNCTION
CTRL PIN
MODES
PCS Band, High Gain,
High Linearity (HGHL)
P
√
√
1X
0
PCS Band, High Gain,
Low Linearity (Paging
Mode) (HGLL)
PCS Band, Midgain
(MGHL)
P
P
√
√
√
√
1X
1X
0
1
Cellular Band CDMA
Mode, High Gain, High
Linearity (HGHL)
C
√
√
01
0
Cellular Band CDMA,
High Gain, Low Linearity
(Paging Mode) (HGLL)
C
√
√
01
0
Cellular Band, CDMA
Mode, Midgain (MGHL)
C
√√
01
1
Cellular Band, CDMA
Mode, Low Gain (LGHL)
C
√√
01
1
Cellular Band, FM Mode,
High Gain, Low Linearity
(HGLL)
C
√
√00
0
Cellular Band, FM Mode,
Midgain
C
√
√00
1
Cellular Band, FM Mode,
Low Gain
C
√
√00
1
Shutdown
— —— —— — — X X
X
Undefined
——————— 1 X 1
Cellular Band, FM Mode,
High Gain, High Linearity
C
√
————
√
0
0
0
(HGHL)
X: Don’t care
6 _______________________________________________________________________________________
0
1
0
0
1
0
1
1
0
1
X
1
0
0
0
0
0
0
0
0
0
0
0
1
0
0
6 Page 
Triple/Dual-Mode
CDMA LNA/Mixers
Typical Application Circuits (continued)
VCC
28 27 26 25
1
24 23
22
21
2 20
3 19
4
SLEEP 5
G2 6
MAX2325
18
17
16
G1 7
8
15
9 10 11 12 13 14
MODE
VCO
VCC
CDMA
VCC
FM
12 ______________________________________________________________________________________
12 Page | ||
| Seiten | Gesamt 14 Seiten | |
| PDF Download | [ MAX2323 Schematic.PDF ] | |
Link teilen
Besondere Datenblatt
| Teilenummer | Beschreibung | Hersteller |
| MAX232 | Dual EIA-232 Drivers/Receivers |  Texas Instruments |
| MAX232 | Multichannel RS-232 Drivers/Receivers | Maxim Integrated |
| MAX2320 | Adjustable / High-Linearity / SiGe Dual-Band LNA/Mixer ICs | Maxim Integrated |
| MAX2321 | Adjustable / High-Linearity / SiGe Dual-Band LNA/Mixer ICs | Maxim Integrated |
| MAX2322 | Adjustable / High-Linearity / SiGe Dual-Band LNA/Mixer ICs | Maxim Integrated |
| Teilenummer | Beschreibung | Hersteller |
| CD40175BC | Hex D-Type Flip-Flop / Quad D-Type Flip-Flop. |
 Fairchild Semiconductor |
| KTD1146 | EPITAXIAL PLANAR NPN TRANSISTOR. |
 KEC |
| www.Datenblatt-PDF.com | 2020 | Kontakt | Suche |