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Exar Corporation

XRD87L75 Datasheet Preview

XRD87L75 Datasheet

Low-Voltage CMOS 8-Bit High-Speed Analog-to-Digital Converter

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FEATURES
· 8-Bit Resolution
· Up to 10MHz Sampling Rate
· Internal S/H Function
· Single Supply: 3.3V
· VIN DC Range: 0V to VDD
· VREF DC Range: 1V to VDD
· Low Power: 25mW typ. (excluding reference)
· Latch-Up Free
XRD87L75
Low-Voltage CMOS 8-Bit High-Speed
Analog-to-Digital Converter
· ESD Protection: 2000V Minimum
· Small 20-Pin SOIC/SSOP Packages
April 2==2 1
APPLICATIONS
· Digital Color Copiers
· Cellular Telephones
· CCD-Based Systems
· Hardware Scanners
· Video Capture Boards
GENERAL DESCRIPTION
The XRD87L75 is an 8-bit Analog-to-Digital Converter in
a small 20-pin SOIC/SSOP package. Designed using
an advanced 3.3V CMOS process, this part offers
excellent performance, low power consumption and
latch-up free operation.
This device uses a two-step flash architecture to
maintain low power consumption at high conversion
rates. The input circuitry of the XRD87L75 includes an
on-chip S/H function and allows the user to digitize
analog input signals between AGND and AVDD. Careful
design and chip layout have achieved a low analog input
capacitance. This reduces “kickback” and eases the
requirements of the buffer/amplifier used to drive the
XRD87L75.
SIMPLIFIED BLOCK AND TIMING DIAGRAM
The designer can choose the internally generated
reference voltages by connecting VRB to VRBS and VRT to
VRTS , or provide external reference voltages to the VRB
and VRT pins. The internal reference generates 0.4V at
VRB and 1.72V at VRT. Providing external reference
voltages allows easy interface to any input signal range
between GND and VDD. This also allows the system to
adjust these voltages to cancel zero scale and full
scale errors, or to change the input range as needed.
The device operates from a single +3.3V supply. Power
consumption is 25mW at FS = 6MHz.
Specified for operation over the commercial / industrial
(-40 to +85°C) temperature range, the XRD87L75 is
available in Surface Mount (SOIC), Shrink Small Out-
line (SSOP) and Plastic Dual-In-line (PDIP) Packages.
Rev. 1.00
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 (510) 668-7000 FAX (510) 668-7017




Exar Corporation

XRD87L75 Datasheet Preview

XRD87L75 Datasheet

Low-Voltage CMOS 8-Bit High-Speed Analog-to-Digital Converter

No Preview Available !

XRD87L75
ORDERING INFORMATION
Package
Type
SOIC
PDIP
SSOP
Temperature
Range
-40 to +85°C
-40 to +85°C
-40 to +85°C
Part No.
XRD87L75AID
XRD87L75AIP
XRD87L75AIU
PIN CONFIGURATIONS
See Packaging Section for Package Dimensions
DNL
(LSB)
+/-0.5
+/-0.5
+/-0.5
INL
(LSB)
+/-1.5
+/-1.5
+/-1.5
20-Pin PDIP (300 MIL) - P20
PIN OUT DEFINITIONS
PIN NO. NAME
1 DGND
DESCRIPTION
Digital Ground
2 DB0
3 DB1
4 DB2
Data Output Bit 0 (LSB)
Data Output Bit 1
Data Output Bit 2
5 DB3
6 DB4
Data Output Bit 3
Data Output Bit 4
7 DB5
8 DB6
9 DB7
Data Output Bit 5
Data Output Bit 6
Data Output Bit 7 (MSB)
10 DVDD
Digital Power Supply
20-Pin SOIC (Jedec, 300 MIL) - D20
20-Pin SSOP (5.3mm) - U20
PIN NO.
11
12
13
14
15
16
17
18
19
20
NAME
CLK
DVDD
VRTS
VRT
AVDD
VIN
AGND
VRBS
VRB
DGND
DESCRIPTION
Sample Clock
Digital Power Supply
Generates 1.72V if tied to VRT
Top Reference
Analog Power Supply
Analog Input
Analog Ground
Generates 0.4V if tied to VRB
Bottom Reference
Digital Ground
Rev. 1.00
2


Part Number XRD87L75
Description Low-Voltage CMOS 8-Bit High-Speed Analog-to-Digital Converter
Maker Exar Corporation
Total Page 15 Pages
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