MAX5864 Datasheet, PDF (1/26 Pages) Maxim Integrated Products – Ultra-Low-Power, High-Dynamic- Performance, 22Msps Analog Front End

19-2915; Rev 1; 10/03
EVAALVUAAILTAIOBNLEKIT
Ultra-Low-Power, High-Dynamic-
Performance, 22Msps Analog Front End
General Description
The MAX5864 ultra-low-power, highly integrated analog
front end is ideal for portable communication equipment
such as handsets, PDAs, WLAN, and 3G wireless termi-
nals. The MAX5864 integrates dual 8-bit receive ADCs
and dual 10-bit transmit DACs while providing the high-
est dynamic performance at ultra-low power. The ADCs’
analog I-Q input amplifiers are fully differential and
accept 1V_P-P full-scale signals. Typical I-Q channel
phase matching is ±0.1° and amplitude matching is
±0.03dB. The ADCs feature 48.5dB SINAD and 69dBc
spurious-free dynamic range (SFDR) at f_IN = 5.5MHz and
f_CLK = 22Msps. The DACs’ analog I-Q outputs are fully
differential with ±400mV full-scale output, and 1.4V com-
mon-mode level. Typical I-Q channel phase match is
±0.15° and amplitude match is ±0.05dB. The DACs also
feature dual 10-bit resolution with 71.7dBc SFDR, and
57dB SNR at f_OUT = 2.2MHz and f_CLK = 22MHz.
The ADCs and DACs operate simultaneously or indepen-
dently for frequency-division duplex (FDD) and time-divi-
sion duplex (TDD) modes. A 3-wire serial interface
controls power-down and transceiver modes of opera-
tion. The typical operating power is 42mW at f_CLK =
22Msps with the ADCs and DACs operating simultane-
ously in transceiver mode. The MAX5864 features an
internal 1.024V voltage reference that is stable over the
entire operating power-supply range and temperature
range. The MAX5864 operates on a +2.7V to +3.3V ana-
log power supply and a +1.8V to +3.3V digital I/O power
supply for logic compatibility. The quiescent current is
5.6mA in idle mode and 1µA in shutdown mode. The
MAX5864 is specified for the extended (-40°C to +85°C)
temperature range and is available in a 48-pin thin QFN
package.
Applications
Narrowband/Wideband CDMA Handsets
and PDAs
Fixed/Mobile Broadband Wireless Modems
3G Wireless Terminals
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX5864ETM
MAX5864E/D
-40°C to +85°C
-40°C to +85°C
48 Thin QFN-EP*
(7mm x 7mm)
Dice**
*EP = Exposed paddle.
**Contact factory for dice specifications.
Pin Configuration appears at end of data sheet.
Features
o Integrated Dual 8-Bit ADCs and Dual 10-Bit DACs
o Ultra-Low Power
42mW at f_CLK = 22MHz (Transceiver Mode)
34mW at f_CLK = 15.36MHz (Transceiver Mode)
Low-Current Idle and Shutdown Modes
o Excellent Dynamic Performance
48.5dB SINAD at f_IN = 5.5MHz (ADC)
71.7dB SFDR at f_OUT = 2.2MHz (DAC)
o Excellent Gain/Phase Match
±0.1° Phase, ±0.03dB Gain at f_IN = 5.5MHz (ADC)
o Internal/External Reference Option
o +1.8V to +3.3V Digital Output Level (TTL/CMOS
Compatible)
o Multiplexed Parallel Digital Input/Output for
ADCs/DACs
o Miniature 48-Pin Thin QFN Package (7mm ✕ 7mm)
o Evaluation Kit Available (Order MAX5865EVKIT)
Functional Diagram
IA+
IA-
QA+
QA-
ID+
ID-
QD+
QD-
REFP
COM
REFN
REFIN
ADC
ADC
OUTPUT
MUX
ADC
DAC
DAC
INPUT
MUX
DAC
REF AND
BIAS
SERIAL
INTERFACE
AND SYSTEM
CONTROL
MAX5864
DA0–DA7
CLK
DD0–DD9
DIN
SCLK
CS
________________________________________________________________ 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.