Dual 8-Bit, 60 MSPS A/D Converter
AD9059
FEATURES
Dual 8-Bit ADCs on a Single Chip
Low Power: 400 mW Typical
On-Chip 2.5 V Reference and Track-and-Hold
1 V p-p Analog Input Range
Single 5 V Supply Operation
5 V or 3 V Logic Interface
120 MHz Analog Bandwidth
Power-Down Mode: <12 mW
APPLICATIONS
Digital Communications (QAM Demodulators)
RGB and YC/Composite Video Processing
Digital Data Storage Read Channels
Medical Imaging
Digital Instrumentation
FUNCTIONAL BLOCK DIAGRAM
PWRDN
VD
VDD
AD9059
AINA
T/H
ADCA
8
D7A–D0A
VREF
ENCODE
2.5V
AINB
T/H
ADCB
8
D7B–D0B
GND
PIN CONFIGURATION
PRODUCT DESCRIPTION
The AD9059 is a dual 8-bit monolithic analog-to-digital converter
optimized for low cost, low power, small size, and ease of use.
With a 60 MSPS encode rate capability and full-power analog
bandwidth of 120 MHz typical, the component is ideal for
applications requiring multiple ADCs with excellent dynamic
performance.
AINA 1
28 AINB
VREF 2
27 GND
26 ENCODE
PWRDN 3
25 VD
VD 4
GND 5
AD9059
24 GND
VDD 6
TOP VIEW 23 VDD
D7A (MSB) 7 (Not to Scale) 22 D7B (MSB)
To minimize system cost and power dissipation, the AD9059
includes an internal 2.5 V reference and dual track-and-hold
circuits. The ADC requires only a 5 V power supply and an
encode clock. No external reference or driver components are
required for many applications.
D6A 8
21 D6B
D5A 9
20 D5B
D4A 10
19 D4B
D3A 11
18 D3B
D2A 12
17 D2B
The AD9059’s single encode input is TTL/CMOS compatible
and simultaneously controls both internal ADC channels. The
parallel 8-bit digital outputs can be operated from 5 V or 3 V
supplies. A power-down function may be exercised to bring
total consumption to <12 mW when ADC data is not required
for lengthy periods of time. In power-down mode, the digital
outputs are driven to a high impedance state.
D1A 13
16 D1B
D0A (LSB) 14
15 D0B (LSB)
Fabricated on an advanced BiCMOS process, the AD9059
is available in a space-saving 28-lead shrink small outline
package (28-lead SSOP) and is specified over the industrial
temperature range (–40°C to +85°C).
Customers desiring single-channel digitization may consider the
AD9057, a single 8-bit, 60 MSPS monolithic based on the
AD9059 ADC core. The AD9057 is available in a 20-lead shrink
small outline package (20-lead SSOP) and is specified over the
industrial temperature range.
REV. A
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use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
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© 2003 Analog Devices, Inc. All rights reserved.
