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MAX4000 Datasheet

  • MAX4000

  • ?2.5GHz 45db RF-Detectiong Controllers

  • Maxim   Maxim

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19-2288; Rev 1; 7/02
2.5GHz 45dB RF-Detecting Controllers
General Description
The MAX4000/MAX4001/MAX4002 low-cost, low-power
logarithmic amplifiers are designed to control RF power
amplifiers (PA) operating in the 0.1GHz to 2.5GHz fre-
quency range. A typical dynamic range of 45dB makes
this family of log amps useful in a variety of wireless appli-
cations including cellular handset PA control, transmitter
power measurement, and RSSI for terminal devices.
Logarithmic amplifiers provide much wider measurement
range and superior accuracy to controllers based on
diode detectors. Excellent temperature stability is
achieved over the full operating range of -40擄C to +85擄C.
The choice of three different input voltage ranges elimi-
nates the need for external attenuators, thus simplifying
PA control-loop design. The logarithmic amplifier is a volt-
age-measuring device with a typical signal range of
-58dBV to -13dBV for the MAX4000, -48dBV to -3dBV for
the MAX4001, and -43dBV to +2dBV for the MAX4002.
The input signal for the MAX4000 is internally AC-coupled
using an on-chip 5pF capacitor in series with a 2k鈩?input
resistance. This highpass coupling, with a corner at
16MHz, sets the lowest operating frequency and allows
the input signal source to be DC grounded. The
MAX4001/MAX4002 require an external coupling capaci-
tor in series with the RF input port. These PA controllers
feature a power-on delay when coming out of shutdown,
holding OUT low for approximately 5碌s to ensure glitch-
free controller output.
The MAX4000/MAX4001/MAX4002 family is available in
an 8-pin 碌MAX package and an 8-bump chip-scale pack-
age (UCSP鈩?. The device consumes 5.9mA with a 5.5V
supply, and when powered down the typical shutdown
current is 13碌A(chǔ).
o
Variety of Input Ranges
MAX4000: -58dBV to -13dBV
(-45dBm to 0dBm in 50鈩?
MAX4001: -48dBV to -3dBV
(-35dBm to +10dBm in 50鈩?
MAX4002: -43dBV to +2dBV
(-30dBm to +15dBm in 50鈩?
o
Frequency Range from 100MHz to 2.5GHz
o
Temperature Stable Linear-in-dB Response
o
Fast Response: 70ns 10dB Step
o
10mA Output Sourcing Capability
o
Low Power: 17mW at 3V (typ)
o
Shutdown Current 30碌A(chǔ) (max)
o
Available in an 8-Bump UCSP and a Small 8-Pin
碌MAX Package
Features
o
Complete RF-Detecting PA Controllers
MAX4000/MAX4001/MAX4002
Ordering Information
PART
MAX4000EBL-T
MAX4000EUA
MAX4001EBL-T
MAX4001EUA
MAX4002EBL-T
MAX4002EUA
TEMP RANGE
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
PIN-
PACKAGE
8 UCSP-8
8 碌MAX
8 UCSP-8
8 碌MAX
8 UCSP-8
8 碌MAX
TOP
MARK
ABF
鈥?/div>
ABE
鈥?/div>
ABD
鈥?/div>
Applications
Transmitter Power Measurement and Control
TSSI for Wireless Terminal Devices
Cellular Handsets (TDMA, CDMA, GPRS, GSM)
RSSI for Fiber Modules
Pin Configurations appear at end of data sheet.
Functional Diagram
SHDN
V
CC
OUTPUT
ENABLE
DELAY
+
gm
-
X1
OUT
DET
RFIN
10dB
DET
DET
DET
DET
CLPF
10dB
10dB
10dB
V-I
OFFSET
COMP
LOW-
NOISE
BANDGAP
SET
MAX4000
UCSP is a registered trademark of Maxim Integrated Products,
Inc.
GND
(PADDLE)
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.

MAX4000 PDF文件相關(guān)型號(hào)

MAX4000EBL-T,MAX4001,MAX4001EBL-T,MAX4001EUA,MAX4002,MAX4002EBL-T,MAX4002EUA

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