AD9042 Datasheet, PDF (1/24 Pages) Analog Devices – 12-Bit, 41 MSPS Monolithic A/D Converter

a
12-Bit, 41 MSPS
Monolithic A/D Converter
AD9042
FEATURES
41 MSPS Minimum Sample Rate
80 dB Spurious-Free Dynamic Range
595 mW Power Dissipation
Single +5 V Supply
On-Chip T/H and Reference
Twos Complement Output Format
CMOS-Compatible Output Levels
APPLICATIONS
Cellular/PCS Base Stations
GPS Anti-Jamming Receivers
Communications Receivers
Spectrum Analyzers
Electro-Optics
Medical Imaging
ATE
PRODUCT DESCRIPTION
The AD9042 is a high speed, high performance, low power,
monolithic 12-bit analog-to-digital converter. All necessary
functions, including track-and-hold (T/H) and reference are
included on chip to provide a complete conversion solution.
The AD9042 runs off of a single +5 V supply and provides
CMOS-compatible digital outputs at 41 MSPS.
Designed specifically to address the needs of wideband,
multichannel receivers, the AD9042 maintains 80 dB
spurious-free dynamic range (SFDR) over a bandwidth of
20 MHz. Noise performance is also exceptional; typical
signal-to-noise ratio is 68 dB.
The AD9042 is built on Analog Devices’ high speed complemen-
tary bipolar process (XFCB) and uses an innovative multipass
architecture. Units are packaged in a 28-pin DIP; this custom
AD9042AD PIN DESIGNATIONS
GND 1
28 D11 (MSB)
DV_CC 2
GND 3
27 D10
26 D9
ENCODE 4
25 D8
ENCODE 5 _AD9042 24 D7
GND 6 _{TOP VIEW} 23 D6
GND 7 ^{(Not to Scale)} 22 D5
AIN 8
21 D4
V_OFFSET 9
V_REF 10
GND 11
20 D3
19 D2
18 D1
AV_CC 12
GND 13
17 D0 (LSB)
16 NC
AV_CC 14
15 NC
NC = NO CONNECT
REV. A
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
FUNCTIONAL BLOCK DIAGRAM
AV_CC
DV_CC
AIN
V_OFFSET
V_REF
ENCODE
ENCODE
A1 TH1
TH 2
TH3 A2
ADC
+2.4V
REFERENCE
ADC
DAC
6
AD9042
7
INTERNAL
TIMING _MSB
DIGITAL ERROR CORRECTION LOGIC
LSB
GND
D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
cofired ceramic package forms a multilayer substrate to which
internal bypass capacitors and the 9042 die are attached and a
44-pin TQFP low profile surface mount package. The AD9042
industrial grade is specified from –40°C to +85°C. However,
the AD9042 was designed to perform over the full military
temperature range (–55°C to +125°C); consult factory for
military grade product options.
PRODUCT HIGHLIGHTS
1. Guaranteed sample rate is 41 MSPS.
2. Dynamic performance specified over entire Nyquist band;
spurious signals typ. 80 dBc for –1 dBFS input signals.
3. Low power dissipation: 595 mW off a single +5 V supply.
4. Reference and track-and-hold included on chip.
5. Packaged in 28-pin ceramic DIP and 44-pin TQFP.
AD9042AST PIN DESIGNATIONS
44 43 42 41 40 39 38 37 36 35 34
DV_CC 1
DV_CC 2
ENCODE 3
ENCODE 4
GND 5
GND 6
AIN 7
V_{OFFSET 8}
V_{REF 9}
C1 10
AV_CC 11
PIN 1
AD9042
TOP VIEW
(Not to Scale)
33 D8
32 D7
31 D6
30 D5
29 D4
28 D3
27 D2
26 D1
25 D0 (LSB)
24 GND
23 NC
12 13 14 15 16 17 18 19 20 21 22
NC = NO CONNECT
© Analog Devices, Inc., 1996
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone]
Fax: [phone]