MAX2510EEI+ Maxim Integrated Products, MAX2510EEI+ Datasheet - Page 9

• Manufacturer Part Number: MAX2510EEI+
• Description: RF Receiver IC TXRX IF W/RSSI&MODLTR
• Manufacturer: Maxim Integrated Products
• Type: Transceiverr

Specifications of MAX2510EEI+

• Package / Case: QSOP-28
• Operating Frequency: 600 MHz
• Operating Supply Voltage: 3 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 1. Functional Diagram
The following sections describe each of the blocks
shown in Figure 1.
The receiver consists of two basic blocks: the down-
converter mixer and the limiter/received-signal-strength
indicator (RSSI) section.
The receiver inputs are the RXIN and RXIN pins, which
should be AC coupled and may require a matching
network as shown in the Typical Operating Circuit. To
design a matching network for a particular application,
consult the RXIN Input Impedance plots in the Typical
Operating Characteristics, as well as the Applications
Information sections.
The downconverter consists of an a double-balanced
mixer and an output buffer. The MIXOUT output, a single-
ended current source, can drive a shunt-terminated
_______________Detailed Description
TXOUT
TXOUT
RXEN
TXEN
RXIN
RXIN
GC
LO
LO
MANAGEMENT
PA
_______________________________________________________________________________________
POWER
Limiter/RSSI and Quadrature Modulator
TRANSMIT VGA/PA
VGA
g
MIXOUT
m
Downconverter Mixer
Σ
Low-Voltage IF Transceiver with
IF BPF
VREF = V
Receiver
0°
LIMIN
CC
90°
/ 2
LO PHASE
SHIFTER
VREF
330Ω filter (165Ω load) to more than 2Vp-p over the
entire supply range, providing excellent dynamic
range. The local oscillator (LO) input is buffered and
drives the mixer.
The signal passes through an external IF bandpass fil-
ter into the limiter input (LIMIN). LIMIN is a single-
ended input that is biased at the VREF pin voltage. The
open-circuit input impedance is typically greater than
10kΩ to VREF. For proper operation, LIMIN must be
tied to VREF through the filter-terminating impedance
(which should be less than 1kΩ). The limiter provides a
constant output level, which is largely independent of
the limiter input signal level over a 90dB input range.
The low-impedance limiter outputs provide 600mVp-p
single-ended swing (1.2Vp-p differential swing) and
can drive CMOS inputs directly.
CZ
CORRECTION
LIMITER
OFFSET
MAX2510
RSSI
CZ
LIMOUT
LIMOUT
RSSI
I
I
Q
Q
Limiter
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