Datasheet 7672RPFE05, 7672RPFB10, 7672RPFB05, 7672RPDS10, 7672RPDI10 Datasheet (MAXWELL)

1

Memory

All data sheets are subject to change without notice

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12-Bit A/D Converter

7672

©2001 Maxwell Technologies

All rights reserved.

12.19.01 Rev 11

1000565

FEATURES:

• 12-bit high speed A/D converter

•R

AD-PAK® radiation-hardened against natural space radia-

tion

• Total dose hardness:

- > 100 krad (Si), depending upon space mission

• Excellent Single Event Effect

- SEL > 120 Mev/mg/cm

2

- SEUTH > 5.8 Mev/mg/cm

2

- SEU

Sat

= -1E-4 cm2/Device

• Package:

- 24 pin R

AD-PAK® flat package

- 24 pin R

AD-PAK® DIP

• Fast conversion times:

- 7672-05: 5 µs

- 7672-10: 10 µs

• Low 110 mW typical power consumption

- Corrects all single-bit errors

- Detects all double and some triple-bit errors

• High-speed BiCMOS technology

- Choice of +5V and +10V input ranges

- Operates with +5V and -12V power supplies

- Fast 125 ns bus-access time

DESCRIPTION:

Maxwell Technologies’ 7672 high-speed 12-bit analog-to-

digital converter microcircuit features a greater than 100 krad
(Si) total dose tolerance, depending upon space mission. The
7672 uses an accurate high-speed DAC and comparator to
achieve conversion time as low as 5 µs while dissipating only
110 mW of power. The 7672 is designed to be used with an
external reference voltage. This allows the user to choose a
reference whose performance suits the application or to drive
multiple 7672s from a single system reference, since the refer­ence input is buffered and draws very little current. For digital
signal processing applications where absolute accuracy and
temperature coefficients may be unimportant, a low cost refer­ence can be used. For optimal precision, a high accuracy ref­erence where an absolute 12-bit accuracy can be obtained
over a wide temperature range may be used. Analog input
range is pin-selectable for 0 to +5V, 0 to +10V, or ±5V, making
the ADC ideal for data acquisition and analog input/output
cards. A high-speed digital interface (125 ns data access time)
with three state data outputs is compatible with most micro­processors.

Maxwell Technologies' patented R

AD-PAK® packaging technol-

ogy incorporates radiation shielding in the microcircuit pack­age. It eliminates the need for box shielding while providing
the required radiation shielding for a lifetime in orbit or space
mission. In a GEO orbit, R

AD-PAK provides greater than 100

krad (Si) radiation dose tolerance. This product is available
with screening up to Class S.

12-BIT DAC

+

-

+

-

SUCCESSIVE APPROXIMATION

REGISTER

CONTROL

LOGIC

CLOCK

OSCILLATOR

12-BIT LATCH

THREE-STATE

OUTPUT DRIVERS

2 1 24

23

22

21

19

20

18

17

4 11 12 13 163

V

REF

AIN1 AIN2

V

DD

V

SS

BUSY

CS

RD

CLK OUT

CLK IN

D0D3DGNDD4D11AGND

Logic Diagram

Memory

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All data sheets are subject to change without notice

©2001 Maxwell Technologies

All rights reserved.

12-Bit A/D Converter

7672

12.19.01 Rev 11

1000565

TABLE 1. 7672 PINOUT DESCRIPTION

PIN SYMBOL DESCRIPTION

1 AIN1 Analog Input

2V

REF

Voltage-Reference Input

3 AGND Analog Ground

4-11 D11-D4 Three-State Data Outputs

12 DGND Digital Ground

13-16 D3-D0 Three-State Data Outputs

17 CLKIN Clock Input

18 CLKOUT Clock Output

19 RD

READ Input

20 CS

CHIP SELECT

21 BUSY

BUSY

22 V

SS

Negative Supply, -12V

23 V

DD

Positive Supply, +5V

24 AIN2 Analog Input

TABLE 2. 7672 ABSOLUTE MAXIMUM RATINGS

PARAMETER SYMBOL MIN MAX UNITS

Positive Supply Voltage to DGND V

DD

-0.3 7.0 V

Negative Supply Voltage to DGND V

SS

-17 +0.3c V

AGND to DGND -- -0.3 V

DD

+0.3 V

AIN1, AIN2 to AGND -- -15 +15 V

Digital Input Voltage to DGND V

IN

-0.3 VDD +0.3 V

Digital Output Voltage to DGND V

OUT

-0.3 VDD +0.3 V

V

REF

to AGND -- VSS -0.3 VDD +0.3 V

Power Dissipation to +75°C P

D

-- 1000 mW

Power Dissipation above 75°C (Derate) -- -- 10 mW/°C

Thermal Impedance

Θ

JC

-- 3.24 °C/W

Storage Temperature Range T

STG

-65 +150 °C

Operating Temperature Range T

A

-55 +125 °C

Memory

3

All data sheets are subject to change without notice

©2001 Maxwell Technologies

All rights reserved.

12-Bit A/D Converter

7672

12.19.01 Rev 11

1000565

TABLE 3. 7672 RECOMMENDED OPERATING CONDITIONS

PARAMETER SYMBOL MIN MAX UNITS

Positive Supply Voltage V

DD

4.75 5.25 V

Negative Supply Voltage V

SS

-13.2 -10.8 V

V

REF

Input Range V

REF

-5.05 -4.95 V

Power Dissipation V

DD

= 5V, VSS = -12V P

D

-- 179 mW

TABLE 4. 7672 DC ELECTRICAL CHARACTERISTICS

(VDD = 5V ±5%, VSS = -12V ±10%, V

REF

= -5V, TA = -55 TO 125 °C UNLESS OTHERWISE SPECIFIED)

P

ARAMETER SYMBOL TEST CONDITION MIN MAX UNITS

Input Low Voltage V

IL

-- 0.8 V

Input High Voltage V

IH

2.4 -- V

Output Low Voltage V

OL

I

SINK

= 1.6 mA -- 0.4 V

Output High Voltage V

OH

I

SOURCE

= -200 µA 4.0 -- V

Input Leakage Current I

IN

(CS,RD) VIN = VDD or GND
(CLKIN) V

IN

= VDD or GND

--

--

±10
±20

µA

Output Leakage Current I

LKG

(D0-D11) V

OUT

= VDD or GND -- ±10 µA

Input Capacitance

1

C

IN

-- 10 pF

Floating State Output Capacitance

2

C

OUT

-- 15 pF

Power Supply Current I

DD

I

SS

--

--

7

-12

mA

Power Supply Rejection, V

DD

PSRR (VDD)VDD = 4.75 to 5.25 volts

V

SS

= -12V

-- ±1 LSB

Power Supply Rejection, V

SS

PSRR (VSS)VSS = -10.8 to -13.2 volts

V

DD

= 5V

-- ±1 LSB

Analog Input Current (AIN1 or AIN2) I

AIN

Unipolar Range: 0 to 5 V, 10V
Bipolar Range: ±5V

--

--

±3.5

±1.75

mA

V

REF

Input Range

1

V

REF

-5.05 -4.95 V

V

REF

Input Current I

REF

-- ±3 µA

Resolution RES T

A

= -55 to +125°C 12 -- bits

Integral Nonlinearity INL T

A

= +25 °C

T

A

= -55 to +125°C

--

--

±1
±1

LSB

Differential Nonlinearity DNL 12 bits, no missing codes

T

A

= -55 to +125°C

-- ±0.9 LSB

Unipolar Offset Error UOE T

A

= +25°C

T

A

= -55 to +125°C

--

--

±5
±6

LSB

Unipolar Gain Error UGE T

A

= +25 °C

T

A

= -55 to +125°C

--

--

±5
±7

LSB

Memory

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All data sheets are subject to change without notice

©2001 Maxwell Technologies

All rights reserved.

12-Bit A/D Converter

7672

12.19.01 Rev 11

1000565

Bipolar Zero Error BZE TA = +25°C

T

A

= -55 to +125°C

--

--

±5
±6

LSB

Bipolar Gain Error BGE T

A

= +25°C

T

A

= -55 to +125°C

--

--

±5
±7

LSB

1. Guaranteed by design.

TABLE 5. 7672 TIMING CHARACTERISTICS

1,2

(VDD = 5V ±5%, VSS = -12V ±10%, V

REF

= -5V, TA = -55 TO 125 °C UNLESS OTHERWISE SPECIFIED)

1. 1LSB = FS/4096; T

A

= 25 °C; Performance over power supply tolerance is guaranteed by power supply rejection test.

2. All inputs are 0V to +5V swing with t

r

= tr = 5ns (10 to 90% of +5V) and timed from a voltage level of +1.6V.

P

ARAMETER TEST CONDITION SYMBOL MIN MAX UNITS

Conversion Time, Synchronous Clk,

3

3. Functionally tested.

12.5 clks, T

A

= -55 to +125 °C t

CONV

-- 5.0 us

-- 10

Conversion Time, Asynchronous Clk, 12-13 clks, T

A

= -55 to +125 °C t

CONV

4.8 5.2 us

9.6 10.4

CS

to RD Setup Time TA = -55 to +125 °C t

1

0--ns

RD

to BUSY Delay CL = 50 pF, TA = +25 °C

C

L

= 50 pF, TA = -55 to +125 °C

t

2

--

--

190
270

ns

Data Access Time

4

4. t3 and t6 are measured with the load circuits of Figure 1 and are defined as the time required for an output to cross +0.8 or
+2.4.

C

L

= 100 pF, TA = +25 °C

C

L

= 100 pF, TA = -55 to +125 °C

t

3

--

--

125
170

ns

RD

Pulse Width TA = -55 to +125 °C t

4

t

3

-- ns

CS

to RD Hold Time TA = -55 to +125 °C t

5

0--ns

Data Setup Time After BUSY

4

CL = 100 pF, TA = +25 °C
C

L

= 100 pF, TA = -55 to +125 °C

t

6

--

--

--

70

100

ns

Bus Relinguish Time

5

5. t7 is defined as the time required for the data lines to change 0.5V when loaded with the circuit of Figure 2.

(T

A

= +25 °C)

(-55 < T

A

< +125 °C)

t

7

--

--

75
90

ns

Delay Between Read Operations (-55 < T

A

< +125 °C) t

8

200 -- ns

TABLE 4. 7672 DC ELECTRICAL CHARACTERISTICS

(VDD = 5V ±5%, VSS = -12V ±10%, V

REF

= -5V, TA = -55 TO 125 °C UNLESS OTHERWISE SPECIFIED)

P

ARAMETER SYMBOL TEST CONDITION MIN MAX UNITS

Memory

5

All data sheets are subject to change without notice

©2001 Maxwell Technologies

All rights reserved.

12-Bit A/D Converter

7672

12.19.01 Rev 11

1000565

FIGURE 1. LOAD CIRCUITS FOR ACCESS TIME

FIGURE 2. LOAD CIRCUIT FOR BUS RELINQUISH TIME

Memory

6

All data sheets are subject to change without notice

©2001 Maxwell Technologies

All rights reserved.

12-Bit A/D Converter

7672

12.19.01 Rev 11

1000565

FIGURE 3.

F

IGURE 4. ANALOG INPUT RANGE CONFIGURATIONS

Memory

7

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©2001 Maxwell Technologies

All rights reserved.

12-Bit A/D Converter

7672

12.19.01 Rev 11

1000565

FIGURE 5. UNIPOLAR OPERATING USING A REFERENCE

Memory

8

All data sheets are subject to change without notice

©2001 Maxwell Technologies

All rights reserved.

12-Bit A/D Converter

7672

12.19.01 Rev 11

1000565

D24-02

Note: All dimensions in inches

24 PIN RAD-PAK® DUAL IN LINE PACKAGE

SYMBOL

DIMENSION

MIN NOM MAX

A -- 0.167 0.200

b 0.014 0.018 0.026

b2 0.045 0.050 0.065

c 0.008 0.010 0.018

D -- 1.200 1.280

E 0.510 0.594 0.620

eA 0.600 BSC

eA/2 0.300 BSC

e 0.100 BSC

L 0.135 0.145 0.155

Q 0.015 0.030 0.045

S1 0.005 0.025 --

S2 0.005 -- --

N24

Memory

9

All data sheets are subject to change without notice

©2001 Maxwell Technologies

All rights reserved.

12-Bit A/D Converter

7672

12.19.01 Rev 11

1000565

F24-01

Note: All dimensions in inches

24 PIN RAD-PAK® FLAT PACKAGE

SYMBOL

DIMENSION

MIN NOM MAX

A 0.153 0.168 0.183

b 0.015 0.017 0.022

c 0.004 0.005 0.009

D -- 0.596 0.604

E 0.350 0.400 0.420

E1 -- -- 0.450

E2 0.230 0.236 --

E3 0.030 0.082 --

e 0.050 BSC

L 0.315 0.325 0.335

Q 0.026 0.050 0.056

S1 0.005 0.020 --

N24

Memory

10

All data sheets are subject to change without notice

©2001 Maxwell Technologies

All rights reserved.

12-Bit A/D Converter

7672

12.19.01 Rev 11

1000565

Important Notice:

These data sheets are created using the chip manufacturer’s published specifications. Maxwell Technologies verifies
functionality by testing key parameters either by 100% testing, sample testing or characterization.

The specifications presented within these data sheets represent the latest and most accurate information available to
date. However, these specifications are subject to change without notice and Maxwell Technologies assumes no
responsibility for the use of this information.

Maxwell Technologies’ products are not authorized for use as critical components in life support devices or systems
without express written approval from Maxwell Technologies.

Any claim against Maxwell Technologies must be made within 90 days from the date of shipment from Maxwell Tech­nologies. Maxwell Technologies’ liability shall be limited to replacement of defective parts.

Memory

11

All data sheets are subject to change without notice

©2001 Maxwell Technologies

All rights reserved.

12-Bit A/D Converter

7672

12.19.01 Rev 11

1000565

Product Ordering Options

Model Number

Feature

Option Details

7672

RP

F X

Screening Flow

Package

Radiation Feature

Base Product
Nomenclature

Monolithic
S = Maxwell Class S
B = Maxwell Class B
E = Engineering (testing @ +25°C

)

I = Industrial (testing @ -55°C,
+25°C, +125°C)

D = Dual In-line Package (DIP)
F = Flat Pack

RP = R

AD-PAK® package

12-Bit A/D Converter

-XX

Access Time

05 = 5 ns
10 = 10 ns