MAX1002 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – Low-Power, 60Msps, Dual, 6-Bit ADC

19-1270; Rev 0; 7/97
EVAALVUAAILTAIOBNLEKIT
Low-Power, 60Msps, Dual, 6-Bit ADC
_______________General Description
The MAX1002 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 60Msps while
achieving typical integral nonlinearity (INL) and differ-
ential nonlinearity (DNL) of ±1/4LSB. The ability to
interface directly with baseband I and Q signals makes
the MAX1002 ideal for use in direct-broadcast satellite,
VSAT, and QAM16 demodulation applications.
The MAX1002 input amplifiers feature true differential
inputs, a 55MHz -0.5dB analog bandwidth, 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 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 signal, or 5.78
ENOB with a 50MHz input signal.
The MAX1002 operates with a single +5V power supply
and provides TTL-compatible digital outputs. The device
is available in the commercial temperature range (0°C to
+70°C) and comes in a 36-pin SSOP package.
________________________Applications
____________________________Features
o ±1/4LSB INL and DNL, Typical
o 1/4LSB (typ) Channel-to-Channel Offset Matching
o 0.1dB Gain and 0.5° Phase Matching, Typical
o Internal Bandgap Voltage Reference
o Two Matched 6-Bit, 60Msps ADCs
o Excellent Dynamic Performance:
5.85 ENOB with 20MHz Analog Input
5.7 ENOB with 50MHz Analog Input
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 Single-Ended or Differential Input Drive
o +5V Single Supply
o TTL Outputs
o 90Msps Upgrade with +3.3V CMOS-Compatible
Output Available (MAX1003)
______________Ordering Information
Direct Broadcast Satellite (DBS) Receivers
VSAT Receivers
Wide Local Area Networks (WLAN)
Cable Television Set-Top Boxes
PART
MAX1002CAX
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
6
I
VREF
DATA
BUFFER
I
6
CLOCK
OUT
D0I–D5I
DCLK
GAIN
QIN+
QIN-
INPUT
AMP
Q
OFFSET
CORREC-
TION Q
BANDGAP
REFERENCE
VREF
ADC
Q
CLOCK
DRIVER
MAX1002
6
DATA
6
BUFFER
Q
TNK+
TNK-
DQ0–DQ5
QOCC+
QOCC-
________________________________________________________________ Maxim Integrated Products 1
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