Rainbow Electronics MAX152 User Manual

19-0119; Rev. 1; 12/93

Evaluation Kit Manual

Follows Data Sheet

+3V, 8-Bit ADC with 1µA Power-Down

_______________General Description

The MAX152 high-speed, microprocessor (µP)-com­patible, 8-bit analog-to-digital converter (ADC) uses a
half-flash technique to achieve a 1.8µs conversion
time, and digitizes at a rate of 400k samples per sec­ond (ksps). It operates with single +3V or dual ±3V
supplies and accepts either unipolar or bipolar inputs.
A–P—O—W—E—R—D—O—W—N–pin reduces current consumption to
a typical value of 1µA. The part returns from power­down and acquires an input signal in less than 900ns,
providing large reductions in supply current in applica­tions with burst-mode input signals.

The MAX152 is DC and dynamically tested. Its µP inter­face appears as a memory location or input/output port that
requires no external interface logic. The data outputs use
latched, three-state buffered circuitry for direct connection
to a µP data bus or system input port. The ADC's input/ref­erence arrangement enables ratiometric operation. A fully-

___________________________Features

♦ Single +3.0V to +3.6V Supply
♦ 1.8µs Conversion Time
♦ Power-Up in 900ns
♦ Internal Track/Hold
♦ 400ksps Throughput
♦ Low Power: 1.5mA (Operating Mode)

1µA (Power-Down Mode)

♦ 300kHz Full-Power Bandwidth
♦ 20-Pin DIP, SO and SSOP Packages
♦ No External Clock Required
♦ Unipolar/Bipolar Inputs
♦ Ratiometric Reference Inputs
♦ 2.7V Version Available – Contact Factory

assembled evaluation kit provides a proven PC board lay­out to speed prototyping and design.

_______________________Applications

Cellular Telephones
Portable Radios
Battery-Powered Systems
Burst-Mode Data Acquisition
Digital Signal Processing
Telecommunications
High-Speed Servo Loops

________________Functional Diagram

V

DD

20

THREE-

STATE

DRIVERS

MAX152

19

V

SS

18

PWRDN

D0-D7
DATA
OUT
PINS
2-5,
14-17

VREF+
VREF-

V

12
11

1

IN

GND

4-BIT

FLASH

ADC

4-BIT

DAC



VREF+

4-BIT

16

FLASH

ADC

(4LSB)

TIMING AND CONTROL CIRCUITRY

6

7

10

MODE

WR

/RDY

13

CS

89

RD INT

________________________________________________________________

______________Ordering Information

PART TEMP. RANGE

MAX152CPP 0°C to +70°C
MAX152CWP 0°C to +70°C
MAX152CAP 0°C to +70°C
MAX152C/D 0°C to +70°C
MAX152EPP -40°C to +85°C
MAX152EWP -40°C to +85°C
MAX152EAP -40°C to +85°C
MAX152MJP -55°C to +125°C

* Contact factory for dice specifications.
** Contact factory for availability and processing to MIL-STD-883.

__________________Pin Configuration

TOP VIEW

D0 (LSB)

WR

/RDY

MODE

GND

V

D1
D2

D3

RD

INT

IN

10

1
2
3
4
5

MAX152

6
7
8
9

DIP/SO/SSOP

Call toll free 1-800-998-8800 for free samples or literature.

PIN-PACKAGE

20 Plastic DIP
20 Wide SO
20 SSOP
Dice*
20 Plastic DIP
20 Wide SO
20 SSOP
20 CERDIP**

V

20

DD

V

19

SS

PWRDN

18
17

D7 (MSB)

16

D6

15

D5

14

D4

13

CS

VREF+

12

VREF-

11

Maxim Integrated Products

MAX152

1

+3V, 8-Bit ADC with 1µA Power-Down

ABSOLUTE MAXIMUM RATINGS

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

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

Digital Input Voltage to GND........................-0.3V, (VDD+ 0.3V)

Digital Output Voltage to GND .....................-0.3V, (VDD+ 0.3V)

VREF+ to GND................................(VSS- 0.3V) to (VDD+ 0.3V)

VREF- to GND.................................(VSS- 0.3V) to (VDD+ 0.3V)

VINto GND.....................................(VSS- 0.3V) to (VDD+ 0.3V)

MAX152

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.

ELECTRICAL CHARACTERISTICS

(Unipolar input range, VDD= 3.0V to 3.6V, GND = 0V, VSS= GND, VREF+ = 3.0V, VREF- = GND, specifications are given for RD
mode (pin 7 = GND), T

PARAMETER SYMBOL CONDITIONS UNITS

ACCURACY (Note 1)

Resolution N Bits
Total Unadjusted Error TUE Unipolar range LSB
Differential Nonlinearity DNL No-missing-codes guaranteed LSB
Zero-Code Error (Note 2) Unipolar and bipolar modes LSB
Full-Scale Error (Note 2) Unipolar and bipolar modes LSB
DYNAMIC PERFORMANCE (Note 3)

Signal-to-Noise Plus
Distortion Ratio

Total Harmonic Distortion

Spurious-Free Dynamic Range dB

Input Full-Power Bandwidth VIN= 3.0V
Maximum Input Slew Rate, Tracking V/µs

ANALOG INPUT

Input Voltage Range V
Input Leakage Current I
Input Capacitance C

REFERENCE INPUT

Reference Resistance RREF kΩ
VREF+ Input Voltage Range V
VREF- Input Voltage Range V

2 _______________________________________________________________________________________

= T

to T

A

MIN

, unless otherwise noted.)

MAX

MAX152C/E, f

IN

IN

400kHz, f
MAX152M, f

f

= 30.725kHz

IN

MAX152C/E, f
400kHz, f

MAX152M, f
f

= 30.725kHz

IN

MAX152C/E, f
400kHz, f

MAX152M, f
f

= 30.725kHz

IN

VSS< VIN< V

S/(N+D)

THD dB

IN

Continuous Power Dissipation (TA= +70°C)

Plastic DIP (derate 11.11mW/°C above +70°C) ..........889mW

Wide SO (derate 10.00mW/°C above +70°C)..............800mW

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

CERDIP (derate 11.11mW/°C above +70°C)...............889mW

Operating Temperature Ranges:

MAX152C__ ........................................................0°C to +70°C

MAX152E__ .....................................................-40°C to +85°C

MAX152MJP ..................................................-55°C to +125°C

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

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

MIN TYP MAX

8

±1
±1
±1
±1

=

SAMPLE

= 30.273kHz

IN

SAMPLE

SAMPLE

= 30.273kHz

IN

SAMPLE

SAMPLE

= 30.273kHz

IN

SAMPLE

p-p

= 340kHz,

=

= 340kHz,

=

= 340kHz,

45

45

-50

-50

50

50

0.3

0.28 0.5

VREF- VREF+

DD

±3

22

12 4

VREF- V

V

SS

DD

VREF+

dB

MHz

V
µA
pF

+3V, 8-Bit ADC with 1µA Power-Down

ELECTRICAL CHARACTERISTICS (continued)

(Unipolar input range, VDD= 3.0V to 3.6V, GND = 0V, VSS= GND, VREF+ = 3.0V, VREF- = GND, specifications are given for RD
mode (pin 7 = GND), T

PARAMETER CONDITIONS UNITS

LOGIC INPUTS

Input High Voltage

Input Low Voltage

Input High Current

Input Low Current
Input Capacitance (Note 4)

LOGIC OUTPUTS

Output Low Voltage

Output High Voltage
Floating-State Current

Floating Capacitance (Note 4)

POWER REQUIREMENTS

Positive Supply Voltage
Negative Supply Voltage

Positive Supply Current

Power-Down VDDCurrent
(Note 5)

Negative Supply Current
Power-Down VSSCurrent

Power-Supply Rejection PSR

Note 1: Accuracy measurements performed at VDD= 3.0V, unipolar mode. Operation over supply range is guaranteed by power-

supply rejection test.

Note 2: Bipolar tests are performed with VREF+ = +1.5V, VREF- = -1.5V, VSS= -3.0V.
Note 3: Unipolar input range, VIN= 3.0V
Note 4: Guaranteed by design.
Note 5: Power-down current increases if control inputs are not driven to ground or VDD.

= T

to T

A

MIN

, unless otherwise noted.)

MAX

SYMBOL MIN TYP MAX

V

V

CS, WR, RD, PWRDN

INH

MODE 2.4
CS, WR, RD, PWRDN

INL

MODE 0.8
CS, RD, PWRDN

I

INH

WR

2.0

0.66

±1
±3

µA

MODE 15 100

I

INL

C

CS, WR, RD, PWRDN, MODE
CS, WR, RD, PWRDN, MODE

IN

INT, D0-D7, I

V

V
I

LKG

C

OUT

V

V

INT, D0-D7, I

OL

RDY, I

SINK

INT, D0-D7, I

OH

INT, D0-D7, I
D0-D7, RDY ±3 µA
D0-D7, RDY 58pF

DD

Unipolar operation GND

SS

Bipolar operation (Note 2) -3.6 -3.0

VDD= 3.6V

I

DD

VDD= 3.0V

CS = RD = VDD,

PWRDN = 0

I

CS = RD = 0, PWRDN = V

SS

CS = RD = VDD, PWRDN = 0
VDD= 3.3V ±10%

, WR-RD mode, VDD= 3.0V

P-P

= 20µA

SINK

= 400µA

SINK

= 1mA

= 20µA

SOURCE

= 400µA

SOURCE

MAX152C, CS = RD = 0,
PWRDN = V

MAX152E/M, CS = RD = 0,
PWRDN = V

MAX152C, CS = RD = 0,
PWRDN = V

MAX152E/M, CS = RD = 0,
PWRDN = V

MAX152C/E/M

VDD-0.1
VDD-0.4

3.0 3.6 V

DD

DD

DD

DD

DD

±1/16 ±1/4 LSB

±1 µA

58pF

0.1

0.4

0.4

2.5 5

2.5 6

1.5 3

1.5 3.5

150

150µA
125µA

mA

µA

MAX152

V

V

V

V

V

_______________________________________________________________________________________ 3

+3V, 8-Bit ADC with 1µA Power-Down

TIMING CHARACTERISTICS

(Unipolar input range, VDD= 3V, VSS= 0V, TA= +25°C, unless otherwise noted.) (Note 6)

PARAMETER SYMBOL CONDITIONS

Conversion Time
(WR-RD Mode)

MAX152

Conversion Time
(RD Mode)

Power-Up Time
CS to RD,WR

Setup Time
CS to RD,WR

Hold Time
CS to RDY

Delay
Data Access Time

(RD Mode) (Note 7)
RD to INT Delay

(RD Mode)
Data Hold Time

(Note 8)
Delay Time Between

Conversions
WR Pulse Width

Delay Time Between

WR and RD Pulses

RD Pulse Width

Data Access Time
(Note 7)

RD to INT Delay
WR to INT Delay

RD Pulse Width

Data Access Time
(Note 7)

WR to INT Delay
Data Access Time

After INT (Note 7)

t

CWR

t

CRD

t

UP

t

CSS

t

CSH

t

RDY

t

ACC0CL

t

INTH

t

DH

t

P

t

WR

t

RD

t

READ1

t

ACC1

t

RI

t

INTL

t

READ2

t

ACC2

t

IHWR

t

ID

tRD< t
C

CL= 50pF,
R

INTL

= 100pF

L

= 5.1kΩ to V

L

,

DD

= 100pF

CL= 50pF

WR-RD mode,
determined by t
(Figure 6)

WR-RD mode,
t

< t

RD

INTL

(Figure 6)

ACC1

, CL= 100pF

CL= 50pF
WR-RD mode,

t

> t

,

RD

INTL

determined by t
(Figure 5)

WR-RD mode,
t

< t

RD

INTL

(Figure 5)
Stand-alone mode,

C

= 50pF

L

Stand-alone mode,
C

= 100pF

L

ACC2

, CL= 100pF

ALL GRADES

= +25°C

T

A

MIN TYP MAX

1.8 2.06 2.4 µs

2.0 2.3 2.6 µs

0.9 1.2 1.4 µs

0 0 0 ns

0 0 0 ns

100 120 140 ns

t

CRD

+100

100 160 170 180 ns

100 130 150 ns

450 600 700 ns

0.6 10 0.66 10 0.8 10 µs

0.8 0.9 1.0 µs

400 500 600 ns

400 500 600 ns

300 340 400 ns

0.7 1.45 1.6 1.8

180 220 250 ns

180 220 250 ns

180 200 240 ns

100 130 150 ns

MAX152C/E

= T

T

A

MIN

MIN MAX

to T

t

CRD

+130

MAX

Note 6: Input control signals are specified with tr= tf= 5ns, 10% to 90% of +3.0V, and timed from a voltage level of 1.3V. Timing

delays get shorter at higher supply voltages. See the Converson Time vs. Supply Voltage graph in the

Characteristics

to extrapolate timing delays at other power-supply voltages.

Note 7: See Figure 1 for load circuit. Parameter defined as the time required for the output to cross 0.66V or 2.0V.
Note 8: See Figure 2 for load circuit. Parameter defined as the time required for the data lines to change 0.5V.

MAX152M

= T

T

A

MIN

MIN MAX

Typical Operating

to T

t

CRD

+150

MAX

UNITS

ns

µs

_________________________________________________________________________________________

4 _______________________________________________________________________________________