MAX2055 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – Digitally Controlled, Variable-Gain, Differential ADC Driver/Amplifier

19-2799; Rev 0; 4/03
Digitally Controlled, Variable-Gain, Differential
ADC Driver/Amplifier
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
o 30MHz to 300MHz Frequency Range
o Single-Ended-to-Differential Conversion
o -3dB to +20dB Variable Gain
o 40dBm Output IP3 (at All Gain States and 70MHz)
o 2nd Harmonic -76dBc
o 3rd Harmonic -69dBc
o Noise Figure: 5.8dB at Maximum Gain
o Digitally Controlled Gain with 1dB Resolution and
±0.2dB Accuracy
o Adjustable Bias Current
Ordering Information
PART
TEMP RANGE
MAX2055EUP-T
-40°C to +85°C
*EP = Exposed paddle.
PIN-PACKAGE
20 TSSOP-EP*
TOP VIEW
Pin Configuration/
Functional Diagram
V_CC 1
RF_IN 2
GND 3
B4 4
B3 5
B2 6
B1 7
B0 ₈
V_{CC 9}
RF_OUT- 10
MAX2055
ATTENUATION
LOGIC
CONTROL
TSSOP
20 GND
19 ATTN_OUT
18 GND
17 ISET
16 CC
15 AMPIN
14 LE
13 CBP
12 IBIAS
11 RF_OUT+
________________________________________________________________ Maxim Integrated Products 1
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.