MAXIM MAX1005 Technical data

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_______________General Description

The MAX1005 is a combined digitizer and reconstruc­tion integrated circuit designed to work in systems that
demodulate and modulate communications signals. It
integrates IF undersampling and signal synthesis func­tions into a single, low-power circuit. Its analog-to­digital converter (ADC) is used to directly sample or
undersample a downconverted RF signal, while its
digital-to-analog converter (DAC) recreates the IF sub­carrier and transmission data. The MAX1005’s ADC is
ideal for undersampling applications, due to the analog
input amplifier’s wide (15MHz) bandwidth. The DAC
has very low glitch energy, which minimizes the trans­mission of unwanted spurious signals. An on-chip
reference provides for low-noise ADC and DAC conver­sions.

The MAX1005 provides a high level of signal integrity
from a low power budget. It operates from a single
power supply, or from separate analog and digital sup­plies with independent voltages ranging from +2.7V to
+5.5V. The MAX1005 can operate with an unregulated
analog supply of 5.5V and a regulated digital supply
down to 2.7V. This flexible power-supply operation
saves additional power in complex digital systems.

The MAX1005 has three operating modes: transmit
(DAC active), receive (ADC active), and shutdown
(ADC and DAC inactive). In shutdown mode, the total
supply current drops below 1µA. The device requires
only 2.4µs to wake up from shutdown mode. The
MAX1005 is ideal for hand-held, as well as base-station
applications. It is available in a tiny 16-pin QSOP pack­age specified for operation over both the commercial
and extended temperature ranges.

________________________Applications

PWT1900
PHS/P
Wireless Loops
PCS/N

____________________________Features

♦ Differential-Input, 5-Bit ADC
♦ Differential-Output, 7-Bit DAC
♦ 15Msps Min Conversion Rate
♦ 25MHz -1dB Full-Power Bandwidth
♦ 44dB SFDR for ADC

39dB at 10.7MHz SFDR (Imaged) for DAC

♦ Internal Voltage Reference
♦ Parallel Logic Interface
♦ Single-Supply Operation (+2.7V to +5.5V)
♦ 0.1µA Low-Power Shutdown Mode

MAX1005

IF Undersampler

________________________________________________________________

Maxim Integrated Products

1

16
15
14
13
12
11
10

9

1
2
3
4
5
6
7
8

VCCD CLK

D0
D1
D2
D3
D4
D5
D6

TOP VIEW

MAX1005

QSOP

DGND

RXEN

TXEN

AIO+

AIO-

AGND
VCCA

__________________Pin Configuration

19-1291; Rev 0; 9/97

PART

MAX1005CEE
MAX1005EEE -40°C to +85°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

16 QSOP
16 QSOP

______________Ordering Information

Functional Diagram appears at end of data sheet.

查询MAX1005供应商

MAX1005

IF Undersampler

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCCA = VCCD = 3.0V, f

CLK

= 15MHz, RL= ∞, TA= 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.

VCCA to AGND ........................................................-0.3V, +6.0V

VCCD to DGND........................................................-0.3V, +6.0V

VCCA to VCCD...................................................................±6.3V

Digital I/O Pins (D0–D6, CLK, RXEN, TXEN)

to DGND.................................-0.3V to (VCCD + 0.3V) or 6.0V

(whichever is smaller)

Analog I/O Pins (AIO+, AIO-)

to AGND................................(VCCA - 1.5V) to (VCCA + 0.3V)

AGND to DGND........................................................-0.3V, +0.3V

Power Dissipation (T

A

= +70°C)

QSOP (derate 5.90mW/°C above 70°C)......................470mW

Operating Temperature Ranges

MAX1005CEE .....................................................0°C to +70°C

MAX1005EEE...................................................-40°C to +85°C

Storage Temperature Range.............................-65°C to +150°C

Lead Temperature (soldering, <10sec)...........................+300°C

(Notes 9, 10)

AIO+ = AIO-

(Note 4)

(Notes 6, 7)

(Note 3)

(Note 5)

CONDITIONS

-42

dB

-42 -24

THDTotal Harmonic Distortion

mV368 400 432V

IN

Full-Scale Input Range

LSB±2Offset Error

LSB±0.2DNLDifferential Nonlinearity

LSB±0.2INLIntegral Nonlinearity

Bits5NResolution

dB67PSRPower-Supply Rejection

CLK

period

0.5DAC Latency

dBc-50Clock Feedthrough

µs0.7 2.4t

WAKE

Wakeup Time Exiting Shutdown

LSB±0.2 ±1INLIntegral Nonlinearity

Bits7NResolution

-28 dBcTHD+N

Total Harmonic Distortion plus
Noise

39

dBc

28 39

SFDRSpurious-Free Dynamic Range

LSB±0.2 ±1DNLDifferential Nonlinearity
LSB±1Offset Error

mVp-p736 800 864V

OUT

Transmit Full-Scale Output Voltage

UNITSMIN TYP MAXSYMBOLPARAMETER

VCCA = VCCD = 2.7V to 5.5V

VCCA = VCCD = 3.0V

VCCA = VCCD = 3.0V

VCC_ (A or D or both) = 3.0V ±100mVp-p at
100kHz

VCCA = VCCD = 2.7V to 5.5V

VCCA = VCCD = 3.0V

(Note 9)

(Note 9)

4.9

Bits

4.5 4.9

ENOBEffective Number of Bits

44

dB

24 44

SFDRSpurious-Free Dynamic Range

VCCA = VCCD = 2.7V to 5.5V

VCCA = VCCD = 3.0V

VCCA = VCCD = 2.7V to 5.5V

VCCA = VCCD = 3.0V

TRANSMIT DAC DC ACCURACY (Note 1)

TRANSMIT DAC DYNAMIC PERFORMANCE (TA= +25°C) (Note 2)

TRANSMIT ADC DC ACCURACY (Note 8)

RECEIVE ADC DYNAMIC PERFORMANCE (TA= +25°C) (Note 8)

MAX1005

IF Undersampler

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VCCA = VCCD = 3.0V, f

CLK

= 15MHz, RL= ∞, TA= T

MIN

to T

MAX

, unless otherwise noted.)

VCCD = 2.7V
to 5.5V

VCCD = 2.7V
to 5.5V

D0–D4, VCCD = 2.7V to 5.5V, I

SINK

= 50µA

D0–D4, VCCD = 2.7V to 5.5V,
I

SOURCE

= 200µA

VCCA = VCCD = 3.0V, CL≤ 12.5pF,
RXEN = TXEN

VCCA = VCCD
= 3.0V,
CL≤ 12.5pF

AIO+ or AIO- to GND

Differential between AIO+ and AIO-

VCCA = VCCD
= 3.0V,
CL≤ 12.5pF

CONDITIONS

-0.1 0.5

V

0.3VCCD

V

IL

Input Low Voltage

VCCD - VCCD +

0.5 0.1

V

0.7VCCD

V

IH

Input High Voltage

V0 0.5V

OL

Output Low Voltage

VVCCD - 1.0 VCCDV

OH

Output High Voltage

µA<0.1 5

ICCA +

ICD

Shutdown Supply Current

3.0 5.6

mA

4.0 6.4

ICCDDigital Supply Current

2.5 3.8

mA

9.0 14.8

ICCAAnalog Supply Current

µs0.6 2.4t

WAKE

Wakeup Time Exiting Shutdown
Mode

Msps15

MHz15 25

Input Full-Power Bandwidth
(-1dB)

Conversion Rate

V2.7 5.5

VCCA,

VCCD

Supply Voltage

pF

4

C

IN

Input Capacitance (Note 6)

LSB<0.1PSRPower-Supply Rejection

kΩ1.56 2.00 2.44R

IN

Input Resistance

ppm/°C-2000TCR

IN

Input Resistance Temperature
Coefficient

UNITSMIN TYP MAXSYMBOLPARAMETER

RXEN, TXEN

D0–D6, CLK

RXEN, TXEN

D0–D6, CLK

VIN= 90% of full scale

RXEN = 0, TXEN = 1,
ADC off, DAC on

RXEN = 1, TXEN = 0,
ADC on, DAC off

VCC_ (A or D or both) = 3.0V ±100mVp-p at
100kHz

TA= +25°C, differential between AIO+ and
AIO-

RXEN = 0, TXEN = 1,
ADC off, DAC on

RXEN = 1, TXEN = 0,
ADC on, DAC off

4

DIGITAL INPUTS/OUTPUTS (D0–D6, RXEN, TXEN, CLK) (Note 12)

POWER REQUIREMENTS

ANALOG INPUT/OUTPUT (AIO+, AIO-) (Note 11)