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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1003 Datasheet

Low-Power / 90Msps / Dual 6-Bit ADC

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MAX1003 pdf
19-1236; Rev 0; 6/97
EVAALVUAAILTAIOBNLEKIT
Low-Power, 90Msps, Dual 6-Bit ADC
_______________General Description
The MAX1003 is a dual, 6-bit analog-to-digital converter
(ADC) that combines high-speed, low-power operation
with a user-selectable input range, an internal refer-
ence, and a clock oscillator. The dual parallel ADCs are
designed to convert in-phase (I) and quadrature (Q)
analog signals into two 6-bit, offset-binary-coded digital
outputs at sampling rates up to 90Msps. The ability to
directly interface with baseband I and Q signals makes
the MAX1003 ideal for use in direct-broadcast satellite,
VSAT, and QAM16 demodulation applications.
The MAX1003 input amplifiers feature true differential
inputs, a -0.5dB analog bandwidth of 55MHz, and user-
programmable input full-scale ranges of 125mVp-p,
250mVp-p, or 500mVp-p. With an AC-coupled input
signal, matching performance between input channels
is typically better than 0.1dB gain, 1/4LSB offset, and
0.5° phase. Dynamic performance is 5.85 effective
number of bits (ENOB) with a 20MHz analog input sig-
nal, or 5.7 ENOB with a 50MHz signal.
The MAX1003 operates with +5V analog and +3.3V digi-
tal supplies for easy interfacing to +3.3V-logic-compati-
ble digital signal processors and microprocessors. It
comes in a 36-pin SSOP package.
________________________Applications
Direct Broadcast Satellite (DBS) Receivers
VSAT Receivers
Wide Local Area Networks (WLANs)
Cable Television Set-Top Boxes
____________________________Features
o Two Matched 6-Bit ADCs
o High Sampling Rate: 90Msps per ADC
o Low Power Dissipation: 350mW
o Excellent Dynamic Performance:
5.85 ENOB with 20MHz Analog Input
5.7 ENOB with 50MHz Analog Input
o ±1/4LSB INL and DNL (typ)
o Internal Bandgap Voltage Reference
o Internal Oscillator with Overdrive Capability
o 55MHz (-0.5dB) Bandwidth Input Amplifiers with
True Differential Inputs
o User-Selectable Input Full-Scale Range
(125mVp-p, 250mVp-p, or 500mVp-p)
o 1/4LSB Channel-to-Channel Offset Matching (typ)
o 0.1dB Gain and 0.5° Phase Matching (typ)
o Single-Ended or Differential Input Drive
o Flexible, 3.3V, CMOS-Compatible Digital Outputs
______________Ordering Information
PART
MAX1003CAX
TEMP. RANGE
0°C to +70°C
PIN-PACKAGE
36 SSOP
Pin Configuration appears at end of data sheet.
_________________________________________________________Functional Diagram
IOCC+
IOCC-
IIN+
INPUT
AMP
IIN- I
OFFSET
CORREC-
TION I
ADC
I
VREF
6
DATA
BUFFER
I
6
CLOCK
OUT
DI0–DI5
DCLK
GAIN
QIN+
QIN-
INPUT
AMP
Q
OFFSET
CORREC-
TION Q
BANDGAP
REFERENCE
VREF
ADC
Q
CLOCK
DRIVER
MAX1003
6
DATA
6
BUFFER
Q
TNK+
TNK-
DQ0–DQ5
QOCC+
QOCC-
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1003 Datasheet

Low-Power / 90Msps / Dual 6-Bit ADC

No Preview Available !

MAX1003 pdf
Low-Power, 90Msps, Dual 6-Bit ADC
ABSOLUTE MAXIMUM RATINGS
VCC to GND ............................................................-0.3V to 6.5V
VCCO to OGND ........................................................-0.3V to 6.5V
GND to OGND ........................................................-0.3V to 0.3V
Digital and Clock Output Pins to OGND...-0.3V to VCCO (10sec)
All Other Pins to GND...............................................-0.3V to VCC
Continuous Power Dissipation (TA = +70°C)
SSOP (derate 11.8mW/°C above +70°C) ...................941mW
Operating Temperature Range...............................0°C to +70°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.
DC ELECTRICAL CHARACTERISTICS
(VCC = +5V ±5%, VCCO = 3.3V ±300mV, TA = TMIN to TMAX, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP
DC ACCURACY (Note 1)
Resolution
RES
6
Integral Nonlinearity
INL
-0.5 ±0.25
Differential Nonlinearity
DNL No missing codes over temperature
-0.5 ±0.25
VFSH GAIN = VCC (high gain)
Full-Scale Input Range
VFSM GAIN = open (mid gain)
VFSL GAIN = GND (low gain)
INVERTING AND NONINVERTING ANALOG INPUTS
118.75
237.5
475
125
250
500
Input Open-Circuit Voltage
Input Resistance
Input Capacitance
VAOC
RIN
CIN
Guaranteed by design
2.25 2.35
13 20
3
Common-Mode Voltage Range
VCM
Other analog input driven with external source
(Note 2)
1.75
OSCILLATOR INPUTS
Oscillator Input Resistance
ROSC Other oscillator input tied to VCC + 0.3V
DIGITAL OUTPUTS (DI0–DI5, DQ0–DQ5)
4.8 8
Digital Outputs Logic-High
Voltage
VOH
ISOURCE = 50µA
0.7VCCO
Digital Outputs Logic-Low
Voltage
POWER SUPPLY
Supply Current
Power-Supply Rejection Ratio
Digital Outputs Supply Current
Power Dissipation
VOL ISINK = 400µA
ICC
PSRR
ICCO
PD
VCC = 4.75V to 5.25V (Note 3)
20MHz, full-scale I and Q analog inputs,
CL = 15pF (Note 4)
63
-75
350
MAX UNITS
0.5
0.5
131.25
262.5
525
Bits
LSB
LSB
mVp-p
2.45 V
29 k
5 pF
2.75 V
12.1 k
V
0.5 V
104 mA
-40 dB
21 mA
mW
2 _______________________________________________________________________________________


Part Number MAX1003
Description Low-Power / 90Msps / Dual 6-Bit ADC
Maker Maxim
Total Page 12 Pages
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