adc08062ciwm National Semiconductor Corporation, adc08062ciwm Datasheet

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adc08062ciwm

Manufacturer Part Number
adc08062ciwm
Description
500 Ns A/d Converter With S/h Function And Input Multiplexer
Manufacturer
National Semiconductor Corporation
Datasheet

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© 1999 National Semiconductor Corporation
ADC08061/ADC08062
500 ns A/D Converter with S/H Function and Input
Multiplexer
General Description
Using a patented multi-step A/D conversion technique, the
8-bit ADC08061 and ADC08062 CMOS ADCs offer 500 ns
(typ) conversion time, internal sample-and-hold (S/H), and
dissipate only 125 mW of power. The ADC08062 has a
two-channel multiplexer. The ADC08061/2 family performs
an 8-bit conversion using a 2-bit voltage estimator that gen-
erates the 2 MSBs and two low-resolution (3-bit) flashes that
generate the 6 LSBs.
Input track-and-hold circuitry eliminates the need for an ex-
ternal sample-and-hold. The ADC08061/2 family performs
accurate conversions of full-scale input signals that have a
frequency range of DC to 300 kHz (full-power bandwidth)
without need of an external S/H.
The digital interface has been designed to ease connection
to microprocessors and allows the parts to be I/O or memory
mapped.
Block Diagram
* ADC08061
*
TRI-STATE
*
ADC08062
®
is a registered trademark of National Semiconductor Corporation.
DS011086
Key Specifications
n Resolution
n Conversion Time
n Full Power Bandwidth
n Throughput rate
n Power Dissipation
n Total Unadjusted Error
Features
n 1 or 2 input channels
n No external clock required
n Analog input voltage range from GND to V
n Overflow output available for cascading (ADC08061)
n ADC08061 pin-compatible with the industry standard
Applications
n Mobile telecommunications
n Hard disk drives
n Instrumentation
n High-speed data acquisition systems
ADC0820
560 ns max (WR-RD Mode)
±
1
2
LSB and
DS011086-1
+
100 mW max
www.national.com
June 1999
300 kHz
1.5 MHz
±
1 LSB
8 bits

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adc08062ciwm Summary of contents

Page 1

... I/O or memory mapped. Block Diagram * ADC08061 * * ADC08062 TRI-STATE ® registered trademark of National Semiconductor Corporation. © 1999 National Semiconductor Corporation DS011086 Key Specifications n Resolution n Conversion Time 560 ns max (WR-RD Mode) n Full Power Bandwidth n Throughput rate n Power Dissipation ± ...

Page 2

... Connection Diagrams DS011086-14 Dual-In-Line and Wide-Body Small-Outline Packages N20A or M20B Ordering Information Industrial (−40˚C ADC08061BIN, ADC08062BIN ADC08061CIWM, ADC08062CIWM Pin Description V , These are analog inputs. The input range GND– IN1–8 INPUT ADC08061 has a single input (V ADC08062 has a two-channel multiplexer (V ) ...

Page 3

Pin Description (Continued) A0 This logic input is used to select one of the ADC08062’s input multiplexer channels. A chan- nel is selected as shown in the table below. ADC08062 Channel IN1 1 V IN2 + V ...

Page 4

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. + Supply Voltage (V ) Logic Control Inputs Voltage at Other lInputs and Outputs Input Current at Any Pin ...

Page 5

AC Electrical Characteristics + The following specifications apply for face limits apply for MIN Symbol Parameter t RD Width RDW t WR -RD Mode Conversion Time CONV ( ...

Page 6

DC Electrical Characteristics + The following specifications apply for 25˚C. all other limits Symbol Parameter V Logic “0” Input Voltage IL I Logic “1” Input Current IH I Logic “0” Input Current IL ...

Page 7

DC Electrical Characteristics Note 8: Limits are guaranteed to National’s AOQL (Average Output Quality Level). Note 9: Total unadjusted error includes offset, full-scale, and linearity errors. Note 10: Two on-chip diodes are tied to each analog input and are reversed ...

Page 8

Timing Diagrams FIGURE 2. WR-RD Mode (Mode Pin is High and t www.national.com FIGURE 1. RD Mode (Mode Pin is Low DS011086-6 DS011086 INTL ...

Page 9

Timing Diagrams (Continued) FIGURE 3. WR-RD Mode (Mode Pin is High and t FIGURE 4. WR-RD Mode (Mode Pin is High) Reduced Interface System Connection ( > INTL 9 DS011086-8 DS011086-9 www.national.com ...

Page 10

Timing Diagrams (Continued) FIGURE 5. RD Mode (Pipeline Operation) (Mode Pin is Low and t Typical Performance Characteristics t vs Temperature CRD DS011086-25 Supply Current vs Temperature DS011086-28 Application Information 1.0 FUNCTIONAL DESCRIPTION The ADC08061 and ADC08062 analog-to-digital conversion using ...

Page 11

Application Information (Continued) have a voltage drop of 1/256 of the total reference voltage (V − across them. The remaining resistors make REF+ REF− up the MSB Ladder. They are made up of eight groups of four resistors ...

Page 12

Application Information the five MSBs is subtracted from the analog input voltage as the upper switch is moved from position one to position two. The resulting remainder voltage is applied to the eight flash comparators and, with the lower switch ...

Page 13

Application Information (Continued) minimum output voltages above GND can also be compen- sated by connecting voltage that is equal to this REF− minimum voltage. By reducing V (V REF REF to less than 5V, the ...

Page 14

Application Information External Reference 2.5V Full-Scale (Standard Application) DS011086-20 Note : Bypass capacitors consist of a 0.1 µF ceramic in parallel with a 10 µF bead tantalum. Note the multiple bypass capacitors on the reference and power supply pins. V ...

Page 15

... Physical Dimensions inches (millimeters) unless otherwise noted Wide-Body Small-Outline Package (M) Order Number ADC08061CIWM, or ADC08062CIWM Order Number ADC08061BIN or ADC08062BIN NS Package Number M20B Dual-In-Line Package (N) NS Package Number N20A 15 www.national.com ...

Page 16

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

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