AD9000

Features:

77 MSPS Encode Rate
Bipolar Input Range
Low Error Rate
Overflow Bit
MIL-STD-883 Compliant Versions Available


Application

QAM Telecommunications
Electronic Warfare (ECM, ECCM, ESM)
Radar Guidance Digitizers


Pinout




Specifications

Positive Supply Voltage  . . . . . . . . . . . . . . . . . . .  0.3 V to +6 V
Negative Supply Voltage  . . . . . . . . . . . . . . . . . 6.0 V to +0.3 V
Analog-to-Digital Ground Voltage Differential  . . . . . . . . .    0.5
Analog Input Voltages (AIN, +VREF, VREF)². . . . . . . . . .  +3 V
Differential Reference Voltage (+VREF to VREF)³. . . . . . .  6 V
ENCODE Input Voltage  . . . . . . . . . . . . . . . . . . . .   VS to 0 V
HYSTERESIS Control Voltage  . . . . . . . . . . . .      0 V to + 3.0 V
Digital Output Current  . . . . . . . . . . . . . . . . . . . . . . . .   20 mA
Power Dissipation (+25°C Free Air)⁴ . . . . . . . . . . . .   745 mW
Operating Temperature Range
AD9000JD  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  0°C to +70°C
AD9000SD/SE  . . . . . . . . . . . . . . . . . . . . . .  55°C to +125°C
Storage Temperature Range  . . . . . . . . . . . 65°C to +150°C
Junction Temperature  . . . . . . . . . . . . . . . . . . . . . . . . +175°C
Lead Soldering Temperature (10 sec)  . . . . . . . . . . . .+300°C

Description

The AD9000 is a 6-bit, high speed, analog-to-digital converter with ECL compatible outputs and a bipolar input stage. The AD9000 is fabricated in a high performance bipolar process that allows encode rates up to 77MSPS. The AD9000 employs the standard flash converter architecture based on 64 individual comparators which simultaneously determine the precise analog signal level. The comparators are followed by two stages of decoding logic, allowing the AD9000 to operate with a very low error rate. The low 35 pF input capacitance of the AD9000 greatly simplifies the analog driver stage. An overflow output bit is also incorporated into the AD9000 design as is a hysteresis control pin to modify comparator sensitivity.

The AD9000 is offered as both a commercial temperature range device, 0°C to +70°C, and as an extended temperature range device, 55°C to +125°C. Both versions are available packaged in a 16-pin ceramic DIP. The extended temperature range device is also available in a 28-pin ceramic LCC package. The extended temperature range versions are offered as fully compliant MIL-STD-883 Class B devices.