Dual 8-Bit 50 MSPS
A/D Converter
a
AD9058
FUNCTIONAL BLOCK DIAGRAM
FEATURES
Two Matched ADCs on Single Chip
50 MSPS Conversion Speed
On-Board Voltage Reference
Low Power (<1W)
Low Input Capacitance (10 pF)
65 V Power Supplies
AD9058
+V
REF
8-BIT
ANALOG-
TO-
DIGITAL
CONVERTER
ENCODE
8
A
Flexible Input Range
A
IN
APPLICATIONS
–V
REF
Quadrature Demodulation for Communications
Digital Oscilloscopes
Electronic Warfare
+2 V
REF
Radar
+V
REF
8-BIT
ANALOG-
TO-
8
ENCODE
B
DIGITAL
CONVERTER
GENERAL DESCRIPTION
A
IN
The AD9058 combines two independent high performance
8-bit analog-to-digital converters (ADCs) on a single mono-
lithic IC. Combined with an optional onboard voltage refer-
ence, the AD9058 provides a cost effective alternative for
systems requiring two or more ADCs.
–V
REF
QUADRATURE RECEIVER
Dynamic performance (SNR, ENOB) is optimized to provide
up to 50 MSPS conversion rates. The unique architecture
results in low input capacitance while maintaining high per-
formance and low power (<0.5 watt/channel). Digital inputs
and outputs are TTL compatible.
8
8
G
Q
AD9058
RF
LO
90°
Performance has been optimized for an analog input of 2 V
p-p ( 1 V; 0 V to +2 V). Using the onboard +2 V voltage
reference, the AD9058 can be set up for unipolar positive
operation (0 V to +2 V). This internal voltage reference can
drive both ADCs.
G
I
Commercial (0°C to +70°C) and military (–55°C to +125°C)
temperature range parts are available. Parts are supplied in
hermetic 48-lead DIP and 44-lead “J” lead packages.
REV. B
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use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
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© Analog Devices, Inc., 2000