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PDF AD9040A Data sheet ( Hoja de datos )
| Número de pieza | AD9040A | |
| Descripción | 10-Bit 40 MSPS A/D Converter | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AD9040A (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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10-Bit 40 MSPS
A/D Converter
AD9040A
FEATURES
Low Power: 940 mW
53 dB SNR @ 10 MHz AIN
On-Chip Track-and-Hold, Reference
CMOS Compatible
2 V p-p Analog Input
Fully Characterized Dynamic Performance
AIN
GND
FUNCTIONAL BLOCK DIAGRAM
ENCODE
T/H
AMP
ARRAY
T/H T/H
APPLICATIONS
Ultrasound Medical Imaging
Digital Oscilloscopes
Professional Video
Digital Communications
Advanced Television (MUSE Decoders)
OInstrumentation
VOUT
BAND GAP
REFERENCE
5-BIT
ADC
6-BIT
ADC
VREF
BPREF
REF
AMP
AD9040A
DECODE
LOGIC
ERROR
CORRECTION
DECODE
LOGIC
10
BSOGENERAL DESCRIPTION
The AD9040A is a complete 10-bit monolithic sampling analog-
Lto-digital converter (ADC) with on-board track-and-hold (T/H)
and reference. The unit is designed for low cost, high perfor-
Emance applications and requires only an encode signal to achieve
T40 MSPS sample rates with 10-bit resolution.
EDigital inputs and outputs are CMOS compatible; the analog
PRODUCT HIGHLIGHTS
1. CMOS compatible logic for direct interface to ASICs.
2. On-board track-and-hold provides excellent high frequency
performance on analog inputs, critical for communications
and medical imaging applications.
3. High input impedance and 2 V p-p input range reduce need
for external amplifiers.
input requires a signal of 2 V p-p amplitude. The two-step
4. Easy to use; no cumbersome external voltage references
architecture used in the AD9040A is optimized to provide the
required, allowing denser packing of ADCs for multichannel
best dynamic performance available while maintaining low
applications.
power requirements of only 940 mW typically; maximum dissi-
5. Available in 28-lead PDIP and SOIC packages.
pation is 1.1 W at 40 MSPS.
6. Evaluation board includes AD9040AJR, reconstruction DAC,
and latches. Space is available near the analog input and digital
The signal-to-noise ratio (SNR), including harmonics, is 53 dB,
outputs of the converter for additional circuits. Order as part
or 8.5 ENOB, when sampling an analog input of 10.3 MHz at
number AD9040A/PCB (schematic shown in data sheet).
40 MSPS. Competitive devices perform at less than 7.5 ENOB
and require external references and larger input signals.
The AD9040A A/D converter is available in either a 28-lead
PDIP or a 28-lead SOIC package. The two models operate over
a commercial temperature range of 0°C to 70°C. Contact the
factory regarding availability of ceramic military temperature
range devices.
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.
1 page  
AD9040A
PIN CONFIGURATION
PDIP and SOIC
–VS 1
GND 2
28 D0 (LSB)
27 D1
D7
D6
+VS
ENCODE
+VS 3
GND 4
26 D2
25 D3
D5
NC
VOUT 5
24 D4
VREF 6 AD9040A 23 VD
BPREF 7 TOP VIEW 22 GND
NC 8 (Not to Scale) 21 –VS
–VS
DGND
+VD
BPREF
VREF
ENCODE 9
20 D5
+VS 10
GND 11
–VS 12
AIN 13
GND 14
19 D6
18 D7
17 D8
16 D9 (MSB)
15 OR
OBSOLETENC=NOCONNECT
D4
D3 VOUT
D2 GND
NC = NO CONNECT
DIE LAYOUT AND MECHANICAL INFORMATION
Die Dimensions . . . . . . . . . 204 mils × 185 mils × 21 (± 1) mils
Pad Dimensions . . . . . . . . . . . . . . . . . . . . . . . . 4 mils × 4 mils
Metalization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Aluminum
Backing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . None
Substrate Potential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –VS
Transistor Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5,070
Passivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oxynitride
Die Attach (JN/JR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . Epoxy
Bond Wire (JN/JR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gold
Pin No.
1, 12, 21
2, 4, 11, 14, 22
3, 10
5
6
7
8
9
Mnemonic
–VS
GND
+VS
VOUT
VREF
BPREF
NC
ENCODE
13 AIN
15 OR
16
17–20
23
24–27
28
D9 (MSB)
D8–D5
VD
D4–D1
D0 (LSB)
PIN FUNCTION DESCRIPTIONS
Function
5 V Power Supply.
Ground.
Analog 5 V Power Supply.
Internal Band Gap Voltage Reference (Nominally 2.5 V).
Noninverting Input to Reference Amplifier. Voltage reference for ADC is connected here.
External Connection for (0.1 µF) Reference Bypass Capacitor.
No Connection Internally.
Encode Clock Input to ADC. Internal track-and-hold placed in hold mode (ADC is encoding)
on rising edge.
Noninverting Input to Track-and-Hold Amplifier.
Out-of-Range Condition Output. Active high when analog input exceeds input range of ADC by
1 LSB (< FS – 1 LSB or > +FS + 1 LSB).
Most Significant Bit of ADC Output; TTL/CMOS Compatible.
Digital Output Bits of ADC; TTL/CMOS Compatible.
Digital +5 V Power Supply.
Digital Output Bits of ADC; TTL/CMOS Compatible.
Least Significant Bit of ADC Output; TTL/CMOS Compatible.
REV. D
–5–
5 Page 
AD9040A
OBSOLETE
Figure 8. PCB Top View
DAC Reconstruction
The AD9040A evaluation board provides an onboard AD9721
reconstruction DAC for observing the digitized analog input
signal. The AD9721 is terminated into 51 Ω to provide a 1 V p-p
signal at the output (RC OUTPUT).
Figure 9. PCB Bottom View
Output Data
The output data bits are latched with a CMOS 74AC574 that
drives a 40-pin connector (AMP p/n 102153-9). The data
and clock signals are available on the connector per the pin
assignments shown on the schematic of the evaluation board
(see Figure 10). Output data are available on the falling edge
of the clock.
REV. D
–11–
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet AD9040A.PDF ] | |
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