________________General Description
The MAX1007 is a multifunctional integrated circuit
designed for high-performance mobile radios. It
includes one 8-bit analog-to-digital converter (ADC),
and two 7-bit and two 6-bit digital-to-analog converters
(DACs) for functions including radio-frequency (RF)
power sensing and antenna-diversity selection.
The ADC provides for power sense, receive-signal
strength intensity (RSSI) measurements and system
supervision. In the power-sense mode, the ADC con-
verts the power-sensing circuitry signal (representing
either the transmitted (Tx) or received (Rx) RF power)
into a digital code, ensuring optimum Tx power setting
and Rx signal analysis. An additional direct input to the
ADC provides for system-supervision measurements,
such as power-supply voltages, battery voltage, and
temperature.
Four DAC blocks typically control DC levels in radios.
As part of the Maxim PWT1900 chip set, the two 7-bit
DACs control the gain settings and the two 6-bit DACs
control the varactor diodes to tune a TCXO and bias a
GaAs amplifier. Each DAC register and output can be
updated independently, providing maximum flexibility.
For antenna diversity, a magnitude-comparison circuit
captures and compares two peak signals. A latched
logic-comparator output reveals which signal has the
largest magnitude. The MAX1007 also includes an on-
board voltage reference for the ADC and DACs.
The MAX1007 offers a high level of signal integrity with
minimal power dissipation. Single-supply operation
ranges from +2.85V to +3.6V. To further save power, there
are two shutdown modes: standby and total shutdown.
Standby is a partial shutdown that keeps the bandgap
reference and the 2.4V reference generator active. Total
shutdown disables all circuit blocks except the serial
interface, reducing supply current to less than 1µA.
The MAX1007 is available in a 24-pin SSOP and is
specified for commercial and extended temperature
ranges.
________________________Applications
PWT1900
Wireless Communications:
Cellular Radios PMR/SMR
PCS Radios WLL
____________________________Features
♦ Multi-Input 8-Bit ADC
♦ Two 7-Bit DACs with Buffered Outputs
♦ Two 6-Bit DACs: Buffered/Unbuffered
♦ Power-Sense Conditioning Circuitry
♦ RSSI Measurement
♦ Antenna-Diversity Circuitry
♦ Internal Reference
♦ Serial-Logic Interface
♦ +2.85V to +3.6V Single-Supply Operation
♦ Two Shutdown Modes
MAX1007
Mobile-Radio Analog Controller
________________________________________________________________
Maxim Integrated Products
1
19-1180; Rev 0; 6/98
PART
MAX1007CAG
MAX1007EAG -40°C to +85°C
0°C to +70°C
TEMP. RANGE PIN-PACKAGE
24 SSOP
24 SSOP
Ordering Information
Pin Configuration appears at end of data sheet.
CS
SCLK
DIN
7
DOUT
SDAC
CH0
ADC
PEAK
DETECTOR
POWER
SENSE
RPS
RSSI
FPS1
FPS2
SDAC
XDAC
SDG
GDAC
KDAC
CH1
REFERENCE
PSBIAS
SERIAL
INTERFACE
PSDCTRL
PREAMBLE-SWITCHED DIVERSITY
POWER SENSE CIRCUITRY
PSDWDW
DUAL
T/H
VREF
XDAC
GDAC
KDAC
REF
PSOUT
BANT
ADC CTRL
PKWDW
6
6
7
D FLIP-FLOP
MAX1007
Functional Diagram
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
MAX1007
Mobile-Radio Analog Controller
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(AV
DD
= DV
DD
= +2.85V to +3.6V, f
SCLK
= 1.152MHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
AV
DD
or DV
DD
to AGND or DGND...........................-0.3V to +6V
Digital Inputs to DGND.............................................-0.3V to +6V
Analog Inputs to AGND............................................-0.3V to +6V
REF to AGND............................................................-0.3V to +6V
AGND to DGND.................................................................± 0.3V
AV
DD
to DV
DD
....................................................................± 0.3V
Maximum Current into Any Pin............................................50mA
Continuous Power Dissipation (T
A
= +70°C)
SSOP (derate 8.0mW/°C above +70°C) ......................640mW
Operating Temperature Ranges
MAX1007CAG.....................................................0°C to +70°C
MAX1007EAG..................................................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10sec).............................+300°C
AV
DD
, DV
DD
RxEN = 1, TxEN = 1; AV
DD
= DV
DD
= 3V
RxEN = 1, TxEN = 0; AV
DD
= DV
DD
= 3V; PKWDW and
ADCCTRL as per state B on Figure 1
RxEN = 1, TxEN = 0; AV
DD
= DV
DD
= 3V;
PKWDW = ADCCTRL = DGND
RxEN = 1, TxEN = 0; AV
DD
= DV
DD
= 3V; PKWDW and
ADCCTRL as per state B on Figure 1. PSDWDW and PSD-
CNTRL as per state D on Figure 2
RxEN = 0, TxEN = 1; AV
DD
= DV
DD
= 3V;
PKWDW = ADCCTRL = DGND
RxEN = 0, TxEN = 1; AV
DD
= DV
DD
= 3V;
PKWDW and ADCCTRL as per state B on Figure 1
RxEN = 1, TxEN = 0; AV
DD
= DV
DD
= 3V; PKWDW and
ADCCTRL as per state C on Figure 1
RxEN = 0, TxEN = 1; AV
DD
= DV
DD
= 3V;
PKWDW and ADCCTRL as per state C on Figure 1
CONDITIONS
mA1.24 3.5
Standby:
XDAC, GDAC, Ref, RefBuf Active
mA4.07 10.5
Receive Mode 4:
KDAC, XDAC, ADC, RSSI
Buffer, Ref, RefBuf, PSD
Circuit Active
mA11.2 31
Receive Mode 3:
KDAC, XDAC, ADC, Peak
Detector RSSI Buffer, Ref,
RefBuf Active
V2.85 3.0 3.6Supply Voltages
mA2.95
Receive Mode 2:
KDAC, XDAC, Peak Detector,
RSSI Buffer, Ref, RefBuf Active
mA1.24 3.5
Receive Mode 1:
KDAC, XDAC, Ref, RefBuf
Active
mA1.8 5.0
Transmit Mode 1:
All DACs, Ref, RefBuf Active
mA4.7
Transmit Mode 2:
All DACs, PGA, REF, Peak
Detector, PSBIAS, I
SOURCE
,
RefBuf Active
mA12.2 32
Transmit Mode 3:
All DACs, PGA, REF, Peak
Detector, PSBIAS, I
SOURCE
,
RefBuf, ADC Active
UNITSMIN TYP MAXPARAMETER
RxEN = 0, TxEN = 0; AV
DD
= DV
DD
= 3V;
ADCCTRL = PSDCTRL = PKWDW = PSDWDW = DGND;
SCLK not active, either high or low
µA1 10Total Shutdown
POWER-SUPPLY REQUIREMENTS
SUPPLY CURRENTS [I(AV
DD
) + I(DV
DD
)] (Note 1)