Datasheet

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TLC0820AC, TLC0820AI

Advanced LinCMOS HIGH-SPEED 8-BIT ANALOG-TO-DIGITAL

CONVERTERS USING MODIFIED FLASH TECHNIQUES

SLAS064A – SEPTEMBER 1986 – REVISED JUNE 1994

2–1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Advanced LinCMOS Silicon-Gate

Technology

8-Bit Resolution

Differential Reference Inputs

Parallel Microprocessor Interface

Conversion and Access Time Over

Temperature Range

Read Mode...2.5 µs Max

No External Clock or Oscillator

Components Required

On-Chip Track and Hold

Single 5-V Supply

TLC0820A Is Direct Replacement for

National Semiconductor ADC0820C/CC and

Analog Devices AD7820K/B/T

description

The TLC0820AC and the TLC0820AI are

Advanced LinCMOS 8-bit analog-to-digital

converters each consisting of two 4-bit flash

converters, a 4-bit digital-to-analog converter, a

summing (error) amplifier, control logic, and a

result latch circuit. The modified flash technique

allows low-power integrated circuitry to complete

an 8-bit conversion in 1.18 µs over temperature.

The on-chip track-and-hold circuit has a 100-ns

sample window and allows these devices to

convert continuous analog signals having slew

rates of up to 100 mV/µs without external

sampling components. TTL-compatible 3-state

output drivers and two modes of operation allow

interfacing to a variety of microprocessors. Detailed information on interfacing to most popular microprocessors

is readily available from the factory.

AVAILABLE OPTIONS

TOTAL

PACKAGE

TOTAL

UNADJUSTED

ERROR

SSOP

(DB)

PLASTIC

SMALL OUTLINE

(DW)

PLASTIC

CHIP CARRIER

(FN)

PLASTIC DIP

(N)

0°C to 70°C ±1 LSB TLC0820ACDB TLC0820ACDW TLC0820ACFN TLC0820ACN

–40°C to 85°C ±1 LSB — TLC0820AIDW TLC0820AIFN TLC0820AIN

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

ANLG IN

(LSB) D0

/RDY

MODE

INT

GND

OFLW

D7 (MSB)

REF+

REF–

DB, DW, OR N PACKAGE

(TOP VIEW)

3 2 1 20 19

910111213

OFLW

D7 (MSB)

/RDY

MODE

FN PACKAGE

(TOP VIEW)

D0 (LSB)

ANLG IN

REF+

INT

GND

REF –

NC–No internal connection

Advanced LinCMOS is a trademark of Texas Instruments Incorporated.

Summary of content (15 pages)

PAGE 1
TLC0820AC, TLC0820AI Advanced LinCMOS HIGH-SPEED 8-BIT ANALOG-TO-DIGITAL CONVERTERS USING MODIFIED FLASH TECHNIQUES SLAS064A – SEPTEMBER 1986 – REVISED JUNE 1994 D D D D D D D D Advanced LinCMOS Silicon-Gate Technology 8-Bit Resolution Differential Reference Inputs Parallel Microprocessor Interface Conversion and Access Time Over Temperature Range Read Mode . . . 2.
PAGE 2
TLC0820AC, TLC0820AI Advanced LinCMOS HIGH-SPEED 8-BIT ANALOG-TO-DIGITAL CONVERTERS USING MODIFIED FLASH TECHNIQUES SLAS064A – SEPTEMBER 1986 – REVISED JUNE 1994 functional block diagram REF+ REF – 12 4-Bit Flash Analog-to-Digital Converter (4 MSBs) 11 4 4 18 2 4 3 4 Output Latch and 3-State Buffers 4-Bit Digital-to-Analog Converter Summing Amplifier –1 ANLG IN MODE WR/RDY CS RD 2–2 1 4-Bit Flash Analog-to-Digital Converter (4 LSBs) 5 14 15 16 4 17 OFLW D0 (LSB) D1 D2 D3 D4 D5 D6 D7 (MSB
PAGE 3
TLC0820AC, TLC0820AI Advanced LinCMOS HIGH-SPEED 8-BIT ANALOG-TO-DIGITAL CONVERTERS USING MODIFIED FLASH TECHNIQUES SLAS064A – SEPTEMBER 1986 – REVISED JUNE 1994 Terminal Functions TERMINAL NAME ANLG IN NO. I/O DESCRIPTION 1 I Analog input CS 13 I Chip select. CS must be low in order for RD or WR to be recognized by the ADC.
PAGE 4
TLC0820AC, TLC0820AI Advanced LinCMOS HIGH-SPEED 8-BIT ANALOG-TO-DIGITAL CONVERTERS USING MODIFIED FLASH TECHNIQUES SLAS064A – SEPTEMBER 1986 – REVISED JUNE 1994 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 V Input voltage range, all inputs (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 5
TLC0820AC, TLC0820AI Advanced LinCMOS HIGH-SPEED 8-BIT ANALOG-TO-DIGITAL CONVERTERS USING MODIFIED FLASH TECHNIQUES SLAS064A – SEPTEMBER 1986 – REVISED JUNE 1994 electrical characteristics at specified operating free-air temperature, VCC = 5 V (unless otherwise noted) PARAMETER VOH VOL Hi h l High-level l output t t voltage lt Low level output voltage Low-level TA† MIN Full range 2.4 VCC = 4.75 V,, IOH = – 10 µA Full range 4.5 25°C 4.6 VCC = 5.25 V,, IOL = 1.6 mA Full range 0.4 25°C 0.
PAGE 6
TLC0820AC, TLC0820AI Advanced LinCMOS HIGH-SPEED 8-BIT ANALOG-TO-DIGITAL CONVERTERS USING MODIFIED FLASH TECHNIQUES SLAS064A – SEPTEMBER 1986 – REVISED JUNE 1994 operating characteristics, VCC = 5 V, Vref+ = 5 V, Vref– = 0, tr = tf = 20 ns, TA = 25°C (unless otherwise noted) PARAMETER TEST CONDITIONS† TYP MAX UNIT ± 1/16 ± 1/4 LSB 1 LSB See Figure 1 1.6 2.
PAGE 7
TLC0820AC, TLC0820AI Advanced LinCMOS HIGH-SPEED 8-BIT ANALOG-TO-DIGITAL CONVERTERS USING MODIFIED FLASH TECHNIQUES SLAS064A – SEPTEMBER 1986 – REVISED JUNE 1994 PARAMETER MEASUREMENT INFORMATION CS 50% RD 50% 50% 50% td(NC) WR/RDY 50% With External Pullup td(RDY) td(RIH) INT 50% 50% tconv(R) 90% 10% D0–D7 90% 10% ta(R) tdis Figure 1.
PAGE 8
TLC0820AC, TLC0820AI Advanced LinCMOS HIGH-SPEED 8-BIT ANALOG-TO-DIGITAL CONVERTERS USING MODIFIED FLASH TECHNIQUES SLAS064A – SEPTEMBER 1986 – REVISED JUNE 1994 PARAMETER MEASUREMENT INFORMATION CS Low RD Low tw(W) WR/RDY 50% 50% 50% td(WIH) 50% INT td(NC) 50% td(int) ta(INT) 90% D0 – D7 Data Valid 10% Figure 4.
PAGE 9
TLC0820AC, TLC0820AI Advanced LinCMOS HIGH-SPEED 8-BIT ANALOG-TO-DIGITAL CONVERTERS USING MODIFIED FLASH TECHNIQUES SLAS064A – SEPTEMBER 1986 – REVISED JUNE 1994 PRINCIPLES OF OPERATION The TLC0820AC and TLC0820AI each employ a combination of sampled-data comparator techniques and flash techniques common to many high-speed converters. Two 4-bit flash analog-to-digital conversions are used to give a full 8-bit output. The recommended analog input voltage range for conversion is – 0.1 V to VCC + 0.1 V.
PAGE 10
TLC0820AC, TLC0820AI Advanced LinCMOS HIGH-SPEED 8-BIT ANALOG-TO-DIGITAL CONVERTERS USING MODIFIED FLASH TECHNIQUES SLAS064A – SEPTEMBER 1986 – REVISED JUNE 1994 APPLICATION INFORMATION CS 13 WR 6 RD 8 VCC WR/RDY ANLG IN CS 20 5V 1 ANLG IN RD TLC0820 µP Bus D0 2 D1 3 D2 4 D3 5 D4 14 D5 15 D6 16 D7 17 MODE D0 D1 REF+ 7 5V 12 5V D2 0.1 µF D3 D4 D5 REF – 11 D6 0.
PAGE 11
PACKAGE OPTION ADDENDUM www.ti.
PAGE 12
PACKAGE OPTION ADDENDUM www.ti.com 25-May-2009 TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
PAGE 13
PACKAGE MATERIALS INFORMATION www.ti.com 3-Jan-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant TLC0820ACDBR SSOP DB 20 2000 330.0 16.4 8.2 7.5 2.5 12.0 16.0 Q1 TLC0820ACDWR SOIC DW 20 2000 330.0 24.4 10.8 13.3 2.7 12.0 24.0 Q1 TLC0820AIDWR SOIC DW 20 2000 330.0 24.4 10.8 13.3 2.7 12.0 24.
PAGE 14
PACKAGE MATERIALS INFORMATION www.ti.com 3-Jan-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TLC0820ACDBR SSOP DB 20 2000 367.0 367.0 38.0 TLC0820ACDWR SOIC DW 20 2000 367.0 367.0 45.0 TLC0820AIDWR SOIC DW 20 2000 367.0 367.0 45.
PAGE 15
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