Rainbow-electronics MAX118 Manual do Utilizador descarregar pdf

_______________General Description

The MAX114/MAX118 are microprocessor-compatible,

8-bit, 4-channel and 8-channel analog-to-digital con-

verters (ADCs). They operate from a single +5V supply

and use a half-flash technique to achieve a 660ns con-

version time (1Msps). A power-down (PWRDN) pin

reduces current consumption typically to 1µA. The

devices return from power-down mode to normal oper-

ating mode in less than 200ns, allowing large supply-

current reductions in burst-mode applications (in burst

mode, the ADC wakes up from a low-power state at

specified intervals to sample the analog input signals).

Both converters include a track/hold, enabling the ADC

to digitize fast analog signals.

Microprocessor (µP) interfaces are simplified because the

ADC can appear as a memory location or I/O port without

external interface logic. The data outputs use latched,

three-state buffer circuitry for direct connection to an 8-bit

parallel µP data bus or system input port. The

MAX114/MAX118 input/reference configuration enables

ratiometric operation.

The 4-channel MAX114 is available in a 24-pin DIP or

SSOP. The 8-channel MAX118 is available in a 28-pin

DIP or SSOP. For +3V applications, refer to the

MAX113/MAX117 data sheet.

________________________Applications

High-Speed DSP Remote Data Acquisition

Portable Equipment Communications Systems

____________________________Features

♦ Single +5V Supply Operation

♦ 4 (MAX114) or 8 (MAX118) Analog Input Channels

♦ Low Power: 40mW (operating mode)

5µW (power-down mode)

♦ Total Unadjusted Error ≤1LSB

♦ Fast Conversion Time: 660ns per Channel

♦ No External Clock Required

♦ Internal Track/Hold

♦ 1MHz Full-Power Bandwidth

♦ Internally Connected 8th Channel Monitors

Reference Voltage (MAX118)

MAX114/MAX118

+5V, 1Msps, 4 & 8-Channel,

8-Bit ADCs with 1µA Power-Down

________________________________________________________________

Maxim Integrated Products

4-BIT

DAC

4-BIT

FLASH

ADC

(4MSBs)

4-BIT

FLASH

ADC

(4LSBs)

TIMING AND

CONTROL

ADDRESS

LATCH 

DECODE



REF+

THREE-

STATE

OUTPUT

DRIVERS

MUX

*IN7

*IN8

REF+

*IN6

*IN5

IN4

IN3

IN2

IN1

A1 A2 REF-

PWRDN

MODE

INT

WR/RDY

MAX114/MAX118

* MAX118 ONLY

_________________________________________________________Functional Diagram

19-1083; Rev 1; 8/96

PART

MAX114CNG

MAX114CAG

MAX114C/D 0°C to +70°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

24 Narrow Plastic DIP

24 SSOP

Dice*

______________Ordering Information

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800

MAX114ENG

MAX114EAG

MAX114MRG -55°C to +125°C

-40°C to +85°C

-40°C to +85°C 24 Narrow Plastic DIP

24 SSOP

24 Narrow CERDIP**

Ordering Information continued on last page.

*Dice are specified at T

= +25°C, DC parameters only.

**Contact factory for availability.

Pin Configurations appear on last page.

1 2 3 4 5 6 ... 11 12

MAX114/MAX118 1

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Página 1 - MAX114/MAX118

_______________General DescriptionThe MAX114/MAX118 are microprocessor-compatible,8-bit, 4-channel and 8-channel analog-to-digital con-verters (ADCs).

Página 2

MAX114/MAX118to break this current path during power-down. The FETshould have an on-resistance of less than 2Ω with a 5Vgate drive. When REF- is switc

Página 3

Transfer FunctionFigure 10 shows the MAX114/MAX118’s nominal trans-fer function. Code transitions occur halfway betweensuccessive-integer LSB values.

Página 4

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses arei

Página 5

MAX114/MAX118+5V, 1Msps, 4 & 8-Channel, 8-Bit ADCs with 1µA Power-Down2 __________________________________________________________________________

Página 6

MAX114/MAX118+5V, 1Msps, 4 & 8-Channel, 8-Bit ADCs with 1µA Power-Down____________________________________________________________________________

Página 7

MAX114/MAX118+5V, 1Msps, 4 & 8-Channel, 8-Bit ADCs with 1µA Power-Down4 __________________________________________________________________________

Página 8

MAX114/MAX118+5V, 1Msps, 4 & 8-Channel, 8-Bit ADCs with 1µA Power-Down____________________________________________________________________________

Página 9

MAX114/MAX118+5V, 1Msps, 4 & 8-Channel, 8-Bit ADCs with 1µA Power-Down6 __________________________________________________________________________

Página 10

MAX114/MAX118+5V, 1Msps, 4 & 8-Channel, 8-Bit ADCs with 1µA Power-Down____________________________________________________________________________

Página 11

MAX114/MAX118In read mode, WR/RDY is configured as a status output(RDY), so it can drive the ready or wait input of a µP.RDY is an open-collector outp

Página 12

Pipelined OperationBesides the two standard write-read-mode options,pipelined operation can be achieved by connectingWR to RD (Figure 6). With CS low,

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Rainbow-electronics MAX118 Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Sensores Rainbow-electronics MAX118. Rainbow Electronics MAX118 User Manual Manual do Utilizador

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