TALER ADC150M, ADC150CA, ADC150C Datasheet

ADC150
Programmable
Integrating A/D Converter

THALER CORPORATION • 2015 N. FORBES BOULEVARD • TUCSON, AZ. 85745 • [phone]

FEATURES

• 24 BIT RESOLUTION

• SOFTWARE SELECTABLE FEATURES

• 0.5ppm/°C MAX. SCALE FACTOR ERROR

• 2 ppm MAX. LINEARITY ERROR

• AUTO ZERO

• BUS COMPATIBLE

• INTERNAL CLOCK and REFERENCE

• LOW POWER CONSUMPTION (0.450 WATTS)

APPLICATIONS

• TEST EQUIPMENT

• DATA ACQUISITION

• SCIENTIFIC INSTRUMENTS

• MEDICAL INSTRUMENTS

• SEISMOLOGICAL EQUIPMENT

• ROBOTIC SYSTEMS

• WEIGHING SYSTEMS

DESCRIPTION

ADC150 is a high performance programmable 24­bit integrating A/D converter based on a patented
architecture. The integration time and resolution
along with the power line cycle selection can be
easily programmed through the Mode Control
Byte.

ADC150 offers 2 ppm max. linearity error and
1 ppm/°C max. scale factor error over the military temperature range. It also has excellent offset stability at
2 ppm max. which the user can auto zero if desired.

ADC150's compatibility with popular microcomputer buses increases its ease of application in smart
systems. An on-board microprocessor controls all internal functions of the ADC150. Thaler designers
have minimized external connections to greatly reduce the problem often encountered when applying
ADC's.

Operating from ±15VDC and a +5VDC power supply, ADC150 is packaged in a hermetically sealed 40-pin
ceramic DIP package. Precision test equipment, scientific and medical instruments, and data acquisition
systems are primary application areas for the unusually high resolution and accuracy of this ADC.

Type Operating Range Factor Deviation

ADC150C -25°C to +85°C 60ppm
ADC150CA -25°C to +85°C 30ppm
ADC150M -55°C to +125°C 100ppm

Temperature Max. Scale

ADC150DS REV. F MAR 00

MAXIMUM RATING SPECIFICATIONS ADC150

MODEL

PARAMETER

TEMPERATURE

Operating
Storage

POWER SUPPLY

V

CC

V

EE

V

DD

INPUTS

Analog Inputs
Digital Inputs

EXTERNAL CONNECTIONS

N.C.
N.C.

N.C.

Vee (-15V)

Vee (+15V)

Vdd (+5V)

GND

N.C.

N.C.
N.C.

1

2

3

4

5

6

7

8

9

10

(TOP VIEW)

ADC150

40

ANALOG LOW

39

ANALOG HIGH

38

ALTERNATE INPUT

37

N.C.

36

N.C.
35

34

33

N.C.
N.C.

32

31

N.C.

MIN

-55
0

+14

-14

+4

V

EE

0

INTEGRATION
CAPACITOR

ADC150

MAX

125
160

+16

-16
+6

V

CC

V

DD

NOTES:

1. Power Supply Decoupling

The ADC150 has internal 0.1µF decoupling
capacitors for all power supply inputs. The
internal decoupling capacitors are adequate
for applications with relatively short power
supply leads (approx. 5") or if additional
capacitors are located on a circuit board.
For applications with long power supply
leads an external capacitor of 10 µF on the
+/- 15V inputs and 33 µF on the +5V input is
recommended.

2. Ground

The ground connection (pin 7) should be
made as solid as possible since ground
noise can result in a loss of accuracy. Use
of a ground plane is a good approach to
maintain the full accuracy of the ADC150.

UNITS

°C
°C

VDC
VDC
VDC

N.C.

N.C.

D0

D1

D2
D3

D4

D5
D6

D7

11

12

13

14

15

16

17

18

19

20

30

N.C.
AUTO ZERO

29

RESET
N.C.

28

N.C.

27

N.C.

26

25

MODE CONTROL

24

STATUS 1

23

STATUS 0
CONVERT

22

21

OUTPUT ENABLE

3. External Components

A .68 µF polystyrene integration capacitor
must be connected to pins 34 and 35 with a
lead length not exceeding 2".

4. Analog Inputs

In order to avoid differential noise pickup it is
recommended to use parallel adjacent lines
for the analog inputs (pins 39, 40) on PC
boards and shielded lines outside of the PC
connections.

ADC150DS REV. F MAR 00

ELECTRICAL SPECIFICATIONS

(Vps = +/- 15V, + 5V, T = 25 Deg. C.)

ADC150

MODEL
PARAMETER

ACCURACY

Resolution
Input Equivalent Noise
Offset without Auto Zero
Offset with Auto Zero
Full Scale
Noise (.1-10Hz) @ 10V
Nonlinearity
Normal Mode Rejection

TEMPERATURE STABILITY

Offset
Full Scale

TIME STABILITY

Offset
Full Scale

ERROR ALL SOURCES

24 hrs, +/- 1 Deg. C Amb.

90 days, +/- 5 Deg. C Amb.

1 year, +/- 5 Deg. C Amb.

CONVERSION TIME
WARM-UP TIME

POWER SUPPLY REJECTION

+/- 15 VDC
5 VDC

ANALOG INPUT CHARACTERISTICS

Input Range -10.485760
Bias Current 1.2
Input Impedance 200

POWER SUPPLY VOLTAGES

+15 V

-15 V

POWER SUPPLY CURRENTS

+15 V

-15 V

DIGITAL INPUTS

Low

High

DIGITAL OUTPUTS

Low

High

AUTO ZERO INPUT

Low

High

CONVERT INPUT

Low

High

TEMPERATURE RANGE

* Same as ADC150C
Note: 1) 60 Cycle

2

5 v

5 v

2) ( Max-Min Value) - Noise(.1-10Hz)

MIN MAXTYP MIN MAXTYP MIN MAXTYP

1

60

80
80

14.5 15 15.5 * * * * * * V

14.5

4.0

4.0

ADC150C

18

4.5

4.0 * *

4.0 *

-25

24

1

4
1

100
6
1

2

0.2 0.1

1.0 0.5

.1

2

.0005, 2 .0003, 2 %, +/- Counts
.0010, 2 .0008, 2
.0015, 2

1067 ms

5

10.485755
3

15 15.5

5

5.5

23
24

42

0.8

0.8

0.8

0.8

85 *

ADC150CA ADC150M

*

*

2

0.5
50

*
*

*

* * dB
* * dB

* * * *

* * * * * *
* * * * * *

* * mA
* *

* *

* *

* *

*

*

*
*

.0013, 2

*
* *

* *
* *

*

* *

* *

*

*

-55

*

*

*
*

*

*
*
*

*

*
*

*
*

*
*
*

*

*

*

125

ADC150DS REV. F MAR 00

Bits
µV
ppm
ppm
ppm
µVpp
ppm
dB

ppm/oC
ppm/oC

ppm/month

ppm/24 hrs.

%, +/- Counts
%, +/- Counts

minutes

V
nA
GΩ

V

V

mA
mA

V

V

V
V

V
V

V
V

o

C