Rainbow Electronics MAX118 User Manual

19-1083; Rev 1; 8/96

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

8-Bit ADCs with 1µA Power-Down

_______________General Description

The MAX114/MAX118 are microprocessor-compatible,
8-bit, 4-channel and 8-channel analog-to-digital con­verters (ADCs). They operate from a single +5V supply
and use a half-flash technique to achieve a 660ns con­version time (1Msps). A power-down (PWRDN) pin
reduces current consumption typically to 1µA. The
devices return from power-down mode to normal oper­ating mode in less than 200ns, allowing large supply­current 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.

____________________________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)

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

______________Ordering Information

PART

MAX114CNG

MAX114CAG
MAX114C/D 0°C to +70°C
MAX114ENG
MAX114EAG
MAX114MRG -55°C to +125°C

Ordering Information continued on last page.

*Dice are specified at T
**Contact factory for availability.

Pin Configurations appear on last page.

TEMP. RANGE PIN-PACKAGE

0°C to +70°C
0°C to +70°C

-40°C to +85°C 24 Narrow Plastic DIP

-40°C to +85°C

= +25°C, DC parameters only.

A

24 Narrow Plastic DIP
24 SSOP
Dice*

24 SSOP
24 Narrow CERDIP**

_________________________________________________________Functional Diagram

MAX114/MAX118

REF+

D7
D6
D5
D4

D3
D2
D1
D0

Maxim Integrated Products

1

* MAX118 ONLY



MODE

4-BIT

FLASH

ADC

(4MSBs)

4-BIT

DAC

4-BIT

FLASH

ADC

(4LSBs)

TIMING AND

CONTROL

RD

INT

CS

WR/RDY

THREE-

STATE
OUTPUT
DRIVERS

MAX114/MAX118

*IN8

*IN7
*IN6

*IN5

IN4
IN3
IN2

IN1

________________________________________________________________

MUX

ADDRESS

LATCH 

DECODE

A0

Σ

A1 A2 REF-

REF+

16

PWRDN

For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone]

+5V, 1Msps, 4 & 8-Channel,
8-Bit ADCs with 1µA Power-Down

ABSOLUTE MAXIMUM RATINGS

VDDto GND..............................................................-0.3V to +7V

Digital Input Voltage to GND......................-0.3V to (V

Digital Output Voltage to GND...................-0.3V to (V

REF+ to GND..............................................-0.3V to (V

REF- to GND...............................................-0.3V to (V

IN_ to GND.................................................-0.3V to (V

Continuous Power Dissipation (T

24-Pin Narrow Plastic DIP

= +70°C)

A

DD
DD
DD
DD
DD

+ 0.3V)
+ 0.3V)
+ 0.3V)
+ 0.3V)
+ 0.3V)

(derate 13.33mW/°C above +70°C)....................................1.08W

24-Pin SSOP (derate 8.00mW/°C above +70°C)..............640mW

24-Pin Narrow CERDIP

(derate 12.50mW/°C above +70°C).........................................1W

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

28-Pin Wide Plastic DIP

(derate 14.29mW/°C above +70°C)....................................1.14W

28-Pin SSOP (derate 9.52mW/°C above +70°C)..............762mW

28-Pin Wide CERDIP

(derate 16.67mW/°C above +70°C)....................................1.33W

Operating Temperature Ranges

MAX114/MAX118C_ _...........................................0°C to +70°C

MAX114/MAX118E_ _........................................-40°C to +85°C

MAX114/MAX118M_ _.....................................-55°C to +125°C

Storage Temperature Range.............................-65°C to +150°C

Lead Temperature (soldering, 10sec).............................+300°C

MAX114/MAX118

ELECTRICAL CHARACTERISTICS

(VDD= +5V ±5%, REF+ = 5V, REF- = GND, Read Mode (MODE = GND), TA= T

CONDITIONS

ACCURACY (Note 1)

No-missing-codes guaranteed

DYNAMIC PERFORMANCE

Signal-to-Noise Plus
Distortion Ratio

Spurious-Free Dynamic
Range

SINAD

THDTotal Harmonic Distortion

SFDR

MAX11_C/E, f
MAX11_M, f
MAX11_C/E, f
MAX11_M, f
MAX11_C/E, f
MAX11_M, f
V

= 5Vp-p

_

IN

SAMPLE

SAMPLE

SAMPLE

SAMPLE

SAMPLE

SAMPLE

= 1MHz, f

= 740kHz, f

= 1MHz, f

= 740kHz, f

= 1MHz, f

= 740kHz, f

ANALOG INPUT

Input Voltage Range
Input Leakage Current
Input Capacitance

V

_

IN

GND < V

_

IN

_

IN

< V

_

IN

DD

REFERENCE INPUT

Reference Resistance

REF

REF+ Input Voltage Range
REF- Input Voltage Range

to T

MIN

= 195.8kHz

_

IN

= 195.7kHz

_

IN

= 195.8kHz

_

IN

= 195.7kHz

_

IN

= 195.8kHz

_

IN

= 195.7kHz

_

IN

, unless otherwise noted.)

MAX

45
45

50
50

REF-

REF-

V

-50

-50

REF+

V

DD

REF+

UNITSMIN TYP MAXSYMBOLPARAMETER

Bits8NResolution
LSB±1TUETotal Unadjusted Error
LSB±1DNLDifferential Nonlinearity
LSB±1Zero-Code Error
LSB±1Full-Scale Error
LSB±1/4Channel-to-Channel Mismatch

dB

dB

dB

MHz1Input Full-Power Bandwidth
V/µs3.1 15Input Slew Rate, Tracking

VV
µA±3I
pF32C

kΩ124R

VV

VGND V

2 _______________________________________________________________________________________

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

8-Bit ADCs with 1µA Power-Down

ELECTRICAL CHARACTERISTICS (continued)

(VDD= +5V ±5%, REF+ = 5V, REF- = GND, Read Mode (MODE = GND), TA= T

CONDITIONS

LOGIC INPUTS

Input High Voltage

Input Low Voltage

Input High Current

Input Low Current
Input Capacitance (Note 2)

LOGIC OUTPUTS

Output Low Voltage
Output High Voltage

Three-State Current
Three-State Capacitance

(Note 2)

POWER REQUIREMENTS

Supply Voltage
VDDSupply Current

Note 2: Guaranteed by design.
Note 3: Power-down current increases if logic inputs are not driven to GND or V

V

V

I

V

CS, WR, RD, PWRDN, A0, A1, A2

INH

MODE
CS, WR, RD, PWRDN, A0, A1, A2

INL

MODE

CS, RD, PWRDN, A0, A1, A2
WR

INH

MODE
CS, WR, RD, PWRDN, MODE, A0, A1, A2

INL

CS, WR, RD, PWRDN, MODE, A0, A1, A2

IN

I

= 1.6mA, INT, D0–D7

SINK

OL

RDY, I
I

OH

SOURCE

D0–D7, RDY, digital outputs = 0V to V

LKG

D0–D7, RDY

OUT

DD

CS = RD = 0V,

I

DD

PWRDN = V
CS = RD = VDD, PWRDN = 0V (Note 3)

VDD= 4.75V to 5.25V, V

= 2.6mA

SINK

= 360µA, INT, D0–D7

DD

MAX11_C
MAX11_E/M

= 4.75V

REF

MIN

DD

to T

, unless otherwise noted.)

MAX

2.4

3.5

DD

.

0.8

1.5
±1
±3

50 200

0.4

0.4

815
820

MAX114/MAX118

UNITSMIN TYP MAXSYMBOLPARAMETER

V

V

µA

µA±1I
pF58C

V
V4V

µA±3I
pF58C

V4.75 5.25V

mA

µA110Power-Down VDDCurrent

LSB±1/16 ±1/4PSRPower-Supply Rejection

_______________________________________________________________________________________ 3

+5V, 1Msps, 4 & 8-Channel,
8-Bit ADCs with 1µA Power-Down

TIMING CHARACTERISTICS

(VDD= +4.75V, TA= +25°C, unless otherwise noted.) (Note 4)

TA= +25°C

SYMBOLPARAMETER

CONDITIONS

ALL GRADES

MIN TYP MAX

t

660

CRD

+

50

Conversion Time
(WR-RD Mode)

t

Conversion Time
(RD Mode)

Power-Up Time
CS to RD, WR

Setup Time
CS to RD, WR

Hold Time

MAX114/MAX118

CS to RDY Delay
Data-Access Time

(RD Mode)

t

ACC0

RD to INT Delay
(RD Mode)

Data Hold Time
Minimum Acquisition

Time
WR Pulse Width
Delay Between WR

and RD Pulses
RD Pulse Width

(WR-RD Mode)
Data-Access Time

(WR-RD Mode)

READ1

ACC1

RD to INT Delay
WR to INT Delay
RD Pulse Width

(WR-RD Mode)
Data-Access Time

(WR-RD Mode)
WR to INT Delay

READ2

ACC2

IHWR

Data-Access Time
after INT

Multiplexer Address
Hold Time

tRD< t

CWR

(Note 5)

CRD

UP

CSS

CSH

CL= 50pF,

RDY

RL= 5.1kΩ to V
CL= 100pF (Note 5)

CL= 50pF

INTH

(Note 6)

t

DH

(Note 7)

ACQ

WR

RD

tRD< t
determined by t

tRD< t
(Note 5)

RI

CL= 50pF

INTL

tRD> t
t

ACC2

tRD> t
(Note 5)

Pipelined mode, CL= 50pF
Pipelined mode, CL= 100pF

t

ID

AH

CL= 20pF

,

INTL

CL= 100pF 685 865 1125

DD

,

INTL

ACC1

, CL= 100pF

INTL

, determined by

INTL

, CL= 100pF

INTL

Note 4: Input control signals are specified with tr = tf= 5ns, 10% to 90% of 5V, and timed from a voltage level of 1.6V.
Note 5: See Figure 1 for load circuit. Parameter defined as the time required for the output to cross 0.8V or 2.4V.
Note 6: See Figure 2 for load circuit. Parameter defined as the time required for the data lines to change 0.5V.
Note 7: Also defined as the Minimum Address-Valid to Convert-Start Time.

TA= T

MIN

MAX11_C/E

MIN MAX MIN MAX

875
370

0

0

85

t

+

CRD

65
85
70

185

0.28 10

0.35

205

235
185

610

75

110
100

60

35

to T

MAX

MAX11_M

0

0

260

0.4 10

0.45

240

85

40

t

CRD

975
520

100

75
90
80

275
220

700

130
120

70

UNITS

ns

ns700t
ns320t
ns0t

ns0t

ns70t

+

ns

ns50 80t
ns60
ns160t
µs0.25 10t
µs0.25t

ns160t

ns185t
ns150t

ns380 500t
ns65t

ns90t
ns80t
ns45

ns30t

4 _______________________________________________________________________________________