Rainbow-electronics MAX2055 User Manual

Browse online or download User Manual for Receivers and Amplifiers Rainbow-electronics MAX2055. Rainbow Electronics MAX2055 User Manual

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General Description
The MAX2055 high-performance, digitally controlled,
variable-gain, differential analog-to-digital converter
(ADC) driver/amplifier (DVGA) is designed for use from
30MHz to 300MHz in base station receivers.
The device integrates a digitally controlled attenuator
and a high-linearity single-ended-to-differential output
amplifier, which can either eliminate an external trans-
former, or can improve the even-order distortion perfor-
mance of a transformer-coupled circuit, thus relaxing
the requirements of the anti-alias filter preceding an
ADC. Targeted for ADC driver applications to adjust
gain either dynamically or as a one-time channel gain
setting, the MAX2055 is ideal for applications requiring
high performance. The attenuator provides 23dB of
attenuation range with ±0.2dB accuracy.
The MAX2055 is available in a thermally enhanced 20-
pin TSSOP-EP package and operates over the -40°C to
+85°C temperature range.
Applications
Cellular Base Stations
PHS/PAS Infrastructure
Receiver Gain Control
Broadband Systems
Automatic Test Equipment
Terrestrial Links
High-Performance ADC Drivers
Features
30MHz to 300MHz Frequency Range
Single-Ended-to-Differential Conversion
-3dB to +20dB Variable Gain
40dBm Output IP3 (at All Gain States and 70MHz)
2nd Harmonic -76dBc
3rd Harmonic -69dBc
Noise Figure: 5.8dB at Maximum Gain
Digitally Controlled Gain with 1dB Resolution and
±0.2dB Accuracy
Adjustable Bias Current
MAX2055
Digitally Controlled, Variable-Gain, Differential
ADC Driver/Amplifier
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
GND
ATTN
OUT
GND
I
SET
B4
GND
RF_IN
V
CC
C
C
AMP
IN
L
E
C
BP
B0
B1
B2
B3
12
11
9
10
I
BIAS
RF_OUT+
RF_OUT-
ATTENUATION
LOGIC
CONTROL
V
CC
TSSOP
MAX2055
TOP VIEW
19-2799; Rev 0; 4/03
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
PART TEMP RANGE PIN-PACKAGE
MAX2055EUP-T -40°C to +85°C 20 TSSOP-EP*
*EP = Exposed paddle.
Pin Configuration/
Functional Diagram
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Summary of Contents

Page 1 - ADC Driver/Amplifier

General DescriptionThe MAX2055 high-performance, digitally controlled,variable-gain, differential analog-to-digital converter(ADC) driver/amplifier (D

Page 2

MAX2055Detailed DescriptionThe MAX2055 is a high-dynamic-range, digitally con-trolled, variable-gain differential ADC driver/amplifier(DVGA) for use i

Page 3

feedback topology. This amplifier is optimized for a fre-quency range of operation from 30MHz to 300MHz witha high-output third-order intercept point

Page 4

MAX2055package. This pad should be connected to the groundplane of the board by using multiple vias under thedevice to provide the best RF/thermal con

Page 5

MAX2055Digitally Controlled, Variable-Gain, DifferentialADC Driver/AmplifierMaxim cannot assume responsibility for use of any circuitry other than cir

Page 6

MAX2055Digitally Controlled, Variable-Gain, DifferentialADC Driver/Amplifier2 ________________________________________________________________________

Page 7

MAX2055Digitally Controlled, Variable-Gain, DifferentialADC Driver/Amplifier__________________________________________________________________________

Page 8

MAX2055Digitally Controlled, Variable-Gain, DifferentialADC Driver/Amplifier4 ________________________________________________________________________

Page 9

MAX2055Digitally Controlled, Variable-Gain, DifferentialADC Driver/Amplifier__________________________________________________________________________

Page 10

SUPPLY CURRENT vs. TEMPERATUREMAX2055 toc24TEMPERATURE (°C)SUPPLY CURRENT (mA)603510-15220230240250260270210-40 85VCC = 5.25VVCC = 5.0VVCC = 4.75VINPU

Page 11

MAX2055Digitally Controlled, Variable-Gain, DifferentialADC Driver/Amplifier__________________________________________________________________________

Page 12

MAX2055Digitally Controlled, Variable-Gain, DifferentialADC Driver/Amplifier8 ________________________________________________________________________

Page 13

MAX2055Digitally Controlled, Variable-Gain, DifferentialADC Driver/Amplifier__________________________________________________________________________

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