Maxim Integrated Producs MAX1005EEE, MAX1005CEE Datasheet

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Maxim Integrated Producs MAX1005EEE, MAX1005CEE Datasheet

19-1291; Rev 0; 9/97

IF Undersampler

_______________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-to- digital 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

Functional Diagram appears at end of data sheet.

____________________________Features

MAX1005

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

 

______________Ordering Information

 

 

 

 

 

PART

TEMP. RANGE

PIN-PACKAGE

 

MAX1005CEE

0°C to +70°C

16 QSOP

 

 

 

 

 

MAX1005EEE

-40°C to +85°C

16 QSOP

 

__________________Pin Configuration

TOP VIEW

VCCD

1

 

16

CLK

DGND

2

 

15

D0

RXEN

3

 

14

D1

AIO+

4

MAX1005

13

D2

AIO-

5

 

12

D3

TXEN

6

 

11

D4

AGND

7

 

10

D5

VCCA

8

 

9

D6

QSOP

________________________________________________________________ Maxim Integrated Products 1

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.

MAX1005

IF Undersampler

ABSOLUTE MAXIMUM RATINGS

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

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

(whichever is smaller)

 

to AGND................................

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

AGND to DGND........................................................

-0.3V, +0.3V

Power Dissipation (TA = +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

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.

ELECTRICAL CHARACTERISTICS

(VCCA = VCCD = 3.0V, fCLK = 15MHz, RL = , TA = TMIN to TMAX, unless otherwise noted.)

PARAMETER

SYMBOL

 

 

CONDITIONS

 

MIN

TYP

MAX

UNITS

 

 

 

 

 

 

 

 

 

 

 

TRANSMIT DAC DC ACCURACY (Note 1)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Resolution

N

 

 

 

7

 

 

Bits

 

 

 

 

 

 

 

 

 

 

 

Integral Nonlinearity

INL

 

 

 

 

 

±0.2

±1

LSB

 

 

 

 

 

 

 

 

 

 

 

Differential Nonlinearity

DNL

 

 

 

 

 

±0.2

±1

LSB

 

 

 

 

 

 

 

 

 

 

 

Offset Error

 

 

 

 

 

 

 

±1

LSB

 

 

 

 

 

 

 

 

 

 

 

Transmit Full-Scale Output Voltage

VOUT

 

 

 

736

800

864

mVp-p

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

Spurious-Free Dynamic Range

SFDR

 

(Note 3)

VCCA = VCCD = 3.0V

28

39

 

dBc

 

 

 

 

 

 

 

VCCA = VCCD = 2.7V to 5.5V

 

 

39

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total Harmonic Distortion plus

THD+N

 

(Note 4)

VCCA = VCCD = 3.0V

 

 

 

-28

dBc

Noise

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Wakeup Time Exiting Shutdown

tWAKE

 

 

 

 

 

0.7

2.4

µs

Clock Feedthrough

 

 

(Note 5)

 

 

 

-50

 

dBc

 

 

 

 

 

 

 

 

 

 

 

DAC Latency

 

 

(Notes 6, 7)

 

 

 

 

0.5

CLK

 

 

 

 

 

 

period

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power-Supply Rejection

PSR

 

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

 

 

67

 

dB

 

100kHz

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TRANSMIT ADC DC ACCURACY (Note 8)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Resolution

N

 

 

 

5

 

 

Bits

 

 

 

 

 

 

 

 

 

 

 

Integral Nonlinearity

INL

 

 

 

 

 

±0.2

 

LSB

 

 

 

 

 

 

 

 

 

 

 

Differential Nonlinearity

DNL

 

 

 

 

 

±0.2

 

LSB

 

 

 

 

 

 

 

 

 

 

 

Offset Error

 

 

AIO+ = AIO-

 

 

 

±2

 

LSB

 

 

 

 

 

 

 

 

 

 

 

Full-Scale Input Range

VIN

 

 

 

368

400

432

mV

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

Total Harmonic Distortion

THD

(Notes 9, 10)

VCCA = VCCD = 3.0V

 

 

-42

-24

dB

 

 

 

 

 

VCCA = VCCD = 2.7V to 5.5V

 

 

-42

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Spurious-Free Dynamic Range

 

SFDR

 

(Note 9)

VCCA = VCCD = 3.0V

 

24

44

 

dB

 

 

 

 

 

 

 

VCCA = VCCD = 2.7V to 5.5V

 

 

44

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Effective Number of Bits

 

ENOB

 

(Note 9)

VCCA = VCCD = 3.0V

 

4.5

4.9

 

Bits

 

 

 

 

 

 

 

 

 

VCCA = VCCD = 2.7V to 5.5V

 

 

4.9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2 _______________________________________________________________________________________

IF Undersampler

ELECTRICAL CHARACTERISTICS (continued)

(VCCA = VCCD = 3.0V, fCLK = 15MHz, RL = ∞, TA = TMIN to TMAX, unless otherwise noted.)

PARAMETER

SYMBOL

 

 

CONDITIONS

MIN

TYP

MAX

UNITS

 

 

 

 

 

 

 

 

 

 

 

Input Full-Power Bandwidth

 

 

VIN = 90% of full scale

15

25

 

MHz

 

(-1dB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Conversion Rate

 

 

 

 

15

 

 

Msps

 

 

 

 

 

 

 

 

 

 

 

Wakeup Time Exiting Shutdown

tWAKE

 

 

 

0.6

2.4

µs

Mode

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power-Supply Rejection

PSR

 

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

 

<0.1

 

LSB

 

 

100kHz

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANALOG INPUT/OUTPUT (AIO+,

AIO-) (Note

11)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input Resistance

RIN

 

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

1.56

2.00

2.44

 

 

AIO-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input Resistance Temperature

TCRIN

 

 

 

 

-2000

 

ppm/°C

 

Coefficient

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input Capacitance (Note 6)

CIN

 

Differential between AIO+ and AIO-

 

 

4

pF

 

 

 

 

 

 

 

 

AIO+ or AIOto GND

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POWER REQUIREMENTS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Supply Voltage

VCCA,

 

 

 

2.7

 

5.5

V

 

VCCD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCCA = VCCD

RXEN = 1, TXEN = 0,

 

9.0

14.8

 

 

 

 

 

ADC on, DAC off

 

 

 

 

 

 

 

 

 

 

 

Analog Supply Current

ICCA

 

= 3.0V,

 

 

 

 

mA

 

RXEN = 0, TXEN = 1,

 

 

 

 

 

 

 

CL ≤ 12.5pF

 

2.5

3.8

 

 

 

 

 

ADC off, DAC on

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCCA = VCCD

RXEN = 1, TXEN = 0,

 

4.0

6.4

 

 

 

 

 

ADC on, DAC off

 

 

 

 

 

 

 

 

 

 

 

Digital Supply Current

ICCD

 

= 3.0V,

 

 

 

 

mA

 

RXEN = 0, TXEN = 1,

 

 

 

 

 

 

 

CL ≤ 12.5pF

 

3.0

5.6

 

 

 

 

 

ADC off, DAC on

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Shutdown Supply Current

ICCA +

 

VCCA = VCCD = 3.0V, CL ≤ 12.5pF,

 

<0.1

5

µA

 

ICD

 

RXEN = TXEN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DIGITAL INPUTS/OUTPUTS (D0–D6, RXEN,

 

TXEN, CLK) (Note 12)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Output High Voltage

VOH

 

D0–D4, VCCD = 2.7V to 5.5V,

VCCD - 1.0

VCCD

V

 

 

ISOURCE = 200µA

 

 

 

 

 

 

 

 

 

Output Low Voltage

VOL

 

D0–D4, VCCD = 2.7V to 5.5V, ISINK = 50µA

0

 

0.5

V

 

 

 

 

VCCD = 2.7V

D0–D6, CLK

0.7VCCD

 

 

 

 

Input High Voltage

VIH

 

 

 

 

 

V

 

 

 

VCCD -

 

VCCD +

 

 

to 5.5V

RXEN, TXEN

 

 

 

 

 

0.5

 

0.1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input Low Voltage

VIL

 

VCCD = 2.7V

D0–D6, CLK

 

 

0.3VCCD

V

 

 

to 5.5V

RXEN, TXEN

-0.1

 

0.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX1005

_______________________________________________________________________________________ 3

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