AD7819YNZ Analog Devices Inc, AD7819YNZ Datasheet

AD7819YNZ

Manufacturer Part Number

AD7819YNZ

Description

IC ADC 8BIT SAMPLING PAR 16-DIP

Manufacturer

Analog Devices Inc

Datasheet

1.AD7819YNZ.pdf (11 pages)

Specifications of AD7819YNZ

Data Interface

Parallel

Number Of Bits

Sampling Rate (per Second)

200k

Number Of Converters

Power Dissipation (max)

17.5mW

Voltage Supply Source

Single Supply

Operating Temperature

-40°C ~ 125°C

Mounting Type

Through Hole

Package / Case

16-DIP (0.300", 7.62mm)

Resolution (bits)

8bit

Sampling Rate

200kSPS

Input Channel Type

Single Ended

Supply Voltage Range - Analog

2.7V To 5.5V

Supply Current

3.5mA

Digital Ic Case Style

DIP

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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GENERAL DESCRIPTION

The AD7819 is a high speed, microprocessor-compatible, 8-bit

analog-to-digital converter with a maximum throughput of

200 kSPS. The converter operates off a single 2.7 V to 5.5 V

supply and contains a 4.5 µs successive approximation A/D

converter, track/hold circuitry, on-chip clock oscillator and 8-bit

wide parallel interface. The parallel interface is designed to

allow easy interfacing to microprocessors and DSPs. Using only

address decoding logic the AD7819 is easily mapped into the

microprocessor address space.

When used in its power-down mode, the AD7819 automatically

powers down at the end of a conversion and powers up at the

start of a new conversion. This feature significantly reduces the

power consumption of the part at lower throughput rates. The

AD7819 can also operate in a high speed mode where the part is

not powered down between conversions. In this mode of opera-

tion the part is capable of providing 200 kSPS throughput.

The part is available in a small, 16-lead 0.3" wide, plastic dual-

in-line package (DIP); in a 16-lead, 0.15" wide, narrow body

small outline IC (SOIC) and in a 16-lead, narrow body, thin

shrink small outline package (TSSOP).

PRODUCT HIGHLIGHTS

1. Low Power, Single Supply Operation

2. Automatic Power-Down

3. Parallel Interface

4. Dynamic Specifications for DSP Users

The AD7819 operates from a single 2.7 V to 5.5 V supply

and typically consumes only 10.5 mW of power. The power

dissipation can be significantly reduced at lower through-

put rates by using the automatic power-down mode.

The automatic power-down mode, whereby the AD7819

goes into power-down mode at the end of a conversion and

powers up before the next conversion, means the AD7819

is ideal for battery powered applications; e.g., 57.75 µW

@ 1 kSPS. (See Power vs. Throughput Rate section.)

An easy to use 8-bit wide parallel interface allows interfacing

to most popular microprocessors and DSPs with minimal

external circuitry.

In addition to the traditional ADC specifications, the AD7819

is specified for ac parameters, including signal-to-noise ratio

and distortion.

AD7819

T/H

FUNCTIONAL BLOCK DIAGRAM

2.7 V to 5.5 V, 200 kSPS

AGND

REDISTRIBUTION

CHARGE

COMP

8-Bit Sampling ADC

DAC

CLOCK

REF

OSC

BUSY CS

CONTROL

DRIVERS

THREE-

STATE

LOGIC

RD CONVST

AD7819

DB7

DB0

Related parts for AD7819YNZ

AD7819YNZ Summary of contents

Page 1

GENERAL DESCRIPTION The AD7819 is a high speed, microprocessor-compatible, 8-bit analog-to-digital converter with a maximum throughput of 200 kSPS. The converter operates off a single 2 5.5 V supply and contains a 4.5 µs successive approximation A/D ...

Page 2

AD7819–SPECIFICATIONS Parameter DYNAMIC PERFORMANCE 1 Signal to (Noise + Distortion) Ratio 1 Total Harmonic Distortion (THD) 1 Peak Harmonic or Spurious Noise 2 Intermodulation Distortion 2nd Order Terms 3rd Order Terms DC ACCURACY Resolution Minimum Resolution for Which No Missing ...

Page 3

TIMING CHARACTERISTICS Parameter 10 1.5 1.5 POWER-UP t 4.5 4 ...

Page 4

AD7819 Pin No. Mnemonic Description 1 V Reference Input, 1 REF 2 V Analog Input GND Analog and Digital Ground. Convert Start. A low-to-high transition on this pin initiates a 1.5 ...

Page 5

TERMINOLOGY Signal to (Noise + Distortion) Ratio This is the measured ratio of signal to (noise + distortion) at the output of the A/D converter. The signal is the rms amplitude of the fundamental. Noise is the rms sum of ...

Page 6

AD7819 CIRCUIT DESCRIPTION Converter Operation The AD7819 is a successive approximation analog-to-digital converter based around a charge redistribution DAC. The ADC can convert analog input signals in the range ures 2 and 3 below show simplified ...

Page 7

During the acquisition phase the sampling capacitor must be charged to within a 1/2 LSB of its final value. The time it takes to charge the sampling capacitor (T CHARGE lowing formula: = 6.2 × (R2 + 125 Ω) × ...

Page 8

AD7819 Typical Performance Characteristics 10 1 0.1 0. THROUGHPUT – kSPS 0 AD7819 –10 2048 POINT FFT SAMPLING 136.054kHz – –30 –40 –50 –60 –70 –80 –90 –100 ...

Page 9

EXT CONVST t POWER-UP INT CONVST BUSY CS/RD DB7–DB0 EXT CONVST t POWER-UP INT CONVST BUSY CS/RD DB7–DB0 PARALLEL INTERFACE The parallel interface of the AD7819 is eight bits wide. The out- put data buffers are activated when both CS ...

Page 10

AD7819 MICROPROCESSOR INTERFACING The parallel port on the AD7819 allows the device to be inter- faced to a range of many different microcontrollers. This section explains how to interface the AD7819 with some of the more common microcontroller parallel interface ...

Page 11

OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 16-Lead Plastic DIP (N-16) 0.840 (21.33) 0.745 (18.93 0.280 (7.11) 0.240 (6.10 0.060 (1.52) PIN 1 0.015 (0.38) 0.210 (5.33) MAX 0.130 0.160 (4.06) (3.30) 0.115 (2.93) MIN ...

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