AD9057BRS-80 Datasheet, PDF (1/12 Pages) Analog Devices – 8-Bit 40 MSPS/50 MSPS/80 MSPS Converter

a
8-Bit
40 MSPS/50 MSPS/80 MSPS Converter
AD9057
FEATURES
8-Bit, Low Power ADC: 200 mW Typical
120 MHz Analog Bandwidth
On-Chip 2.5 V Reference and T/H
1 V p-p Analog Input Range
Single 5 V Supply Operation
5 V or 3 V Logic Interface
Power-Down Mode: < 10 mW
Three Performance Grades (40 MSPS, 60 MSPS, 80 MSPS)
APPLICATIONS
Digital Communications (QAM Demodulators)
RGB and YC/Composite Video Processing
Digital Data Storage Read Channels
Medical Imaging
Digital Instrumentation
FUNCTIONAL BLOCK DIAGRAM
AIN
BIAS OUT
VREF IN
VREF OUT
V_D
PWRDN
V_DD
AD9057
T/H
1k⍀
ADC
+2.5V
8
D7–D0
GND
ENCODE
PRODUCT DESCRIPTION
The AD9057 is an 8-bit monolithic analog-to-digital converter
optimized for low cost, low power, small size, and ease of use.
With a 40 MSPS, 60 MSPS, or 80 MSPS encode rates capabil-
ity and full-power analog bandwidth of 120 MHz, the component
is ideal for applications requiring excellent dynamic performance.
To minimize system cost and power dissipation, the AD9057
includes an internal 2.5 V reference and a track-and-hold
circuit. The user must provide only a 5 V power supply and an
encode clock. No external reference or driver components are
required for many applications.
The AD9057’s encode input is TTL/CMOS compatible and the
8-bit digital outputs can be operated from 5 V or 3 V supplies. A
power-down function may be exercised to bring total consump-
tion to < 10 mW. In power-down mode the digital outputs are
driven to a high impedance state.
Fabricated on an advanced BiCMOS process, the AD9057 is
available in a space saving 20-lead surface mount plastic pack-
age (20 SSOP) and is specified over the industrial (–40°C to
+85°C) temperature range.
Customers desiring multichannel digitization may consider the
AD9059, a dual 8-bit, 60 MSPS monolithic based on the
AD9057 ADC core. The AD9059 is available in a 28-lead sur-
face mount plastic package (28 SSOP) and is specified over the
industrial temperature range.
PIN CONFIGURATION
PWRDN 1
20 D0 (LSB)
VREF OUT 2
19 D1
VREF IN 3
18 D2
GND 4 _AD9057 17 D3
V_D 5 TOP VIEW 16 GND
(Not to Scale)
BIAS OUT 6
15 V_DD
AIN 7
14 D4
V_D 8
13 D5
GND 9
12 D6
ENCODE 10
11 D7 (MSB)
REV. C
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© Analog Devices, Inc., 2001