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AD9057 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer AD9057
Beschreibung 8-Bit 40 MSPS/60 MSPS/80 MSPS A/D Converter
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 12 Seiten
AD9057 Datasheet, Funktion
a
FEATURES
8-Bit, Low Power ADC: 200 mW Typical
120 MHz Analog Bandwidth
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
Power-Down Mode: <10 mW
3 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
8-Bit 40 MSPS/60 MSPS/80 MSPS
A/D Converter
AD9057
FUNCTIONAL BLOCK DIAGRAM
AIN
BIAS OUT
VREF IN
VREF OUT
VD
PWRDN
VDD
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 40 MSPS, 60 MSPS, or 80 MSPS encode rate capability
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 (T/H)
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 consumption
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 shrink small outline package
(20-lead SSOP) and is specified over the industrial temperature
range (–40C to +85C).
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-lead SSOP) and is specified over
the industrial temperature range.
REV. D
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
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
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703 © 2003 Analog Devices, Inc. All rights reserved.






AD9057 Datasheet, Funktion
AD9057
350
300
VDD = 5V
250
200
VDD = 3V
150
100
AIN = 10.3MHz, –0.5dBFS
50
0
5 10 20 30 40 50 60 70 80 90
ENCODE RATE (MSPS)
TPC 7. Power Dissipation vs. Encode Rate
46.5
46.0
45.5
SNR
45.0
44.5
SINAD
44.0
43.5
43.0
ENCODE = 60MSPS
AIN = 10.3MHz, –0.5dBFS
42.5
42.0
41.5
–45
0 25 70
TEMPERATURE ( C)
TPC 8. SINAD/SNR vs. Temperature
90
0
–0.2
–0.4
–0.6
–0.8
–1.0
–1.2
–1.4
–1.6
–1.8
–45
0 25 70
TEMPERATURE ( C)
90
TPC 9. ADC Gain vs. Temperature (with External
2.5 V Reference)
12.0
11.0
10.0
VDD = 3V
9.5
9.0
8.5
8.0
VDD = 5V
7.5
7.0
6.5
6.0
–45
0 25 70
TEMPERATURE ( C)
90
TPC 10. tPD vs. Temperature/Supply (VDD = 3 V/5 V)
46.5
46.0
45.5
SNR
45.0
44.5
44.0
43.5
43.0
SINAD
ENCODE = 60MSPS
AIN = 10.3MHz, –05dBFS
42.5
5.8
6.7 7.5 8.35 9.2 10.0
ENCODE HIGH PULSEWIDTH (ns)
10.9
TPC 11. SINAD/SNR vs. Encode Pulsewidth
0
–1
–2
–3
–4
ENCODE = 60MSPS
AIN = –0.5dBFS
–5
–6
–7
–8
–9
–10
1
2
5 10 20
50 100 200
ANALOG FREQUENCY (MHz)
TPC 12. ADC Frequency Response
500
–6– REV. D

6 Page









AD9057 pdf, datenblatt
AD9057
OUTLINE DIMENSIONS
20-Lead Shrink Small Outline Package [SSOP]
(RS-20)
Dimensions shown in millimeters
7.50
7.20
6.90
20 11
5.60
5.30
5.00 8.20
7.80
1 10 7.40
2.00 MAX
1.85
1.75
1.65 0.25
0.09
0.05 MIN
0.65
BSC
COPLANARITY
0.10
0.38
0.22 SEATING
PLANE
8؇
4؇
0؇
COMPLIANT TO JEDEC STANDARDS MO-150AE
0.95
0.75
0.55
Revision History
Location
Page
5/03—Data Sheet changed from REV. C to REV. D.
Change to SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Updated OUTLINE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
9/01—Data Sheet changed from REV. B to REV. C.
Edit to ABSOLUTE MAXIMUM RATINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
–12–
REV. D

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