Datasheet ADS-937MM, ADS-937MC, ADS-937-883, ADS-B937 Datasheet (DATEL)

FEATURES

• 16-bit resolution

• 1MHz minimum sampling rate

• No missing codes over full military temperature range

• Very low power, 1.25 Watts

• Small, 32-pin, side-brazed, ceramic TDIP

• Edge-triggered

• Excellent performance

• Ideal for both time and frequency-domain applications

• Low cost

military (–55 to +125°C) operating temperature ranges. A
proprietary, auto-calibrating, error-correcting circuit enables
the device to achieve specified performance over the full
military temperature range.

ADS-937

16-Bit, 1MHz, Low-Power

Sampling A/D Converters

GENERAL DESCRIPTION

The low-cost ADS-937 is a 16-bit, 1MHz sampling A/D con­verter. This device accurately samples full-scale input signals
up to Nyquist frequencies with no missing codes. This feature,
combined with excellent signal-to-noise ratio (SNR) and total
harmonic distortion (THD), makes the ADS-937 the ideal
choice for both time-domain (CCD/medical imaging, scanners,
process control) and frequency-domain (radar, telecommunica­tions, spectrum analysis) applications.

Packaged in a 32-pin, side-brazed, metal-sealed, ceramic
TDIP, the functionally complete ADS-937 contains a fast­settling sample-hold amplifier, a subranging (two-pass) A/D
converter, an internal reference, timing/control logic, and error­correction circuitry. Digital input and output levels are TTL.
ADS-937 only requires the rising edge of the start convert
pulse to operate.

Requiring ±15V and ±5V supplies, the ADS-937 typically
dissipates 1.25 Watts. The device is offered with both bipolar
(±5V) and unipolar (0 to –10V) analog input ranges. Models
are available for use in either commercial (0 to +70°C) or

INPUT/OUTPUT CONNECTIONS

Figure 1. ADS-937 Functional Block Diagram

1 ANALOG INPUT 32 BIT 1 (MSB)
2 ANALOG GROUND 31 BIT 2
3 UNIPOLAR 30 BIT 3
4 OFFSET ADJUST 29 BIT 4
5 +5V REFERENCE OUT 28 BIT 5
6 GAIN ADJUST 27 BIT 6
7 COMPENSATION 26 BIT 7
8 –15V SUPPLY 25 BIT 8

9 +15V SUPPLY 24 BIT 9
10 +5V ANALOG SUPPLY 23 BIT 10
11 –5V ANALOG SUPPLY 22 BIT 11
12 ANALOG GROUND 21 BIT 12
13 DIGITAL GROUND 20 BIT 13
14 +5V DIGITAL SUPPLY 19 BIT 14
15 EOC 18 BIT 15
16 START CONVERT 17 BIT 16 (LSB)

PIN FUNCTION PIN FUNCTION

REF

DAC

32 BIT 1 (MSB)
31 BIT 2
30 BIT 3
29 BIT 4
28 BIT 5
27 BIT 6
26 BIT 7
25 BIT 8
24 BIT 9
23 BIT 10
22 BIT 11
21 BIT 12
20 BIT 13
19 BIT 14
18 BIT 15

17 BIT 16 (LSB)

TIMING AND

CONTROL LOGIC

ANALOG INPUT 1

START CONVERT 16

EOC 15

–

+

S/H

BUFFER

DIGITAL CORRECTION LOGIC

FLASH

ADC

1

FLASH

ADC

2

Σ

AMP

GAIN

CIRCUIT

COMPENSATION 7

+5V REFERENCE OUT 5

10

+5V ANALOG

SUPPLY

11

–5V ANALOG

SUPPLY

2, 12

ANALOG

GROUND

14

+5V DIGITAL

SUPPLY

9

+15V

SUPPLY

8

–15V

SUPPLY

13

DIGITAL

GROUND

OFFSET ADJUST 4

UNIPOLAR 3

GAIN ADJUST 6

DATEL, Inc., Mansfield, MA 02048 (USA) • Tel: [phone] Fax: [phone] • Email: [e-mail] • Internet: www.datel.com

® ®

ADS-937

2

® ®

+25°C 0 to +70°C –55 to +125°C

ANALOG INPUTS MIN. TYP. MAX. MIN. TYP. MAX. MIN. TYP. MAX. UNITS

Input Voltage Ranges ➁

Bipolar — ±5 — — ±5 — — ±5 — Volts
Unipolar — 0 to –10 — — 0 to –10 — — 0 to –10 — Volts

Input Resistance — 1 — — 1 — — 1 — kΩ
Input Capacitance — 7 15 — 7 15 — 7 15 pF

DIGITAL INPUTS

Logic Levels

Logic "1" +2.0 — — +2.0 — — +2.0 — — Volts
Logic "0" — — +0.8 — — +0.8 — — +0.8 Volts
Logic Loading "1" — — +20 — — +20 — — +20 µA
Logic Loading "0" — — –20 — — –20 — — –20 µA

Start Convert Positive Pulse Width ➂ 20 500 — 20 500 — 20 500 — ns

STATIC PERFORMANCE

Resolution — 16 — — 16 — — 16 — Bits
Integral Nonlinearity — ±0.75 — — ±1.5 — — ±2 — LSB
Differential Nonlinearity (f

in = 10kHz) –0.95 ±0.5 +1 –0.95 ±0.5 +1 –0.95 ±0.5 +1.5 LSB

Full Scale Absolute Accuracy — ±0.1 ±0.25 — ±0.2 ±0.4 — ±0.25 ±0.5 %FSR
Bipolar Zero Error (Tech Note 2) — ±0.1 ±0.15 — ±0.1 ±0.25 — ±0.15 ±0.5 %FSR
Bipolar Offset Error (Tech Note 2) — ±0.1 ±0.2 — ±0.15 ±0.3 — ±0.2 ±0.5 %FSR
Gain Error (Tech Note 2) — ±0.1 ±0.3 — ±0.25 ±0.5 — ±0.4 ±0.7 %
Unipolar Offset Error (Tech Note 2) — ±0.1 ±0.15 — ±0.1 ±0.25 — ±0.15 ±0.5 %FSR
No Missing Codes (f

in = 10kHz) 16 — — 16 — — 16 — — Bits

DYNAMIC PERFORMANCE

Peak Harmonics (–0.5dB)

dc to 100kHz — –90 –84 — –90 –84 — –88 –83 dB
100kHz to 500kHz — –88 –81 — –88 –81 — –87 –80 dB

Total Harmonic Distortion (–0.5dB)

dc to 100kHz — –87 –82 — –87 –82 — –86 –81 dB
100kHz to 500kHz — –86 –81 — –86 –81 — –85 –80 dB

Signal-to-Noise Ratio

(w/o distortion, –0.5dB)
dc to 100kHz 85 88 — 85 88 — 84 87 — dB
100kHz to 500kHz 84 87 — 84 87 — 83 87 — dB

Signal-to-Noise Ratio ➃

(& distortion, –0.5dB)
dc to 100kHz 81 85 — 81 85 — 80 84 — dB
100kHz to 500kHz 80 84 — 80 84 — 78 83 — dB

Noise — 110 — — 110 — — 110 — µVrms
Two-Tone Intermodulation
Distortion (f

in = 100kHz,

240kHz, f

s = 1MHz, –0.5dB) — –85 — — –85 — — –85 — dB

Input Bandwidth (–3dB)

Small Signal (–20dB input) — 4.5 — — 4.5 — — 4.5 — MHz
Large Signal (–0.5dB input) — 4 — — 4 — — 4 — MHz

Feedthrough Rejection (f

in = 500kHz) — 84 — — 84 — — 84 — dB

Slew Rate — ±33 — — ±33 — — ±33 — V/µs
Aperture Delay Time — +20 — — +20 — — +20 — ns
Aperture Uncertainty — 5 — — 5 — — 5 — ps rms
S/H Acquisition Time

( to ±0.003%FSR, 10V step) — 260 300 — 260 300 — 260 300 ns

Overvoltage Recovery Time ➄ — 500 1000 — 500 1000 — 500 1000 ns
A/D Conversion Rate 1 — — 1 — — 1 — — MHz

PARAMETERS LIMITS UNITS

+15V Supply (Pin 9) 0 to +16 Volts
–15V Supply (Pin 8) 0 to –16 Volts
+5V Supply (Pins 10, 14) 0 to +6 Volts
–5V Supply (Pin 11) 0 to –6 Volts
Digital Input (Pin 16) –0.3 to +V

DD +0.3 Volts

Analog Input (Pin 1) ±15 Volts
Lead Temperature (10 seconds) +300 °C

PARAMETERS MIN. TYP. MAX. UNITS

Operating Temp. Range, Case

ADS-937MC 0 — +70 °C
ADS-937MM/883 –55 — +125 °C

Thermal Impedance

θjc — 5 — °C/Watt
θca — 22 — °C/Watt

Storage Temperature Range –65 — +150 °C
Package Type 32-pin,side-brazed, metal-sealed, ceramic TDIP

Weight 0.56 ounces (16 grams)

ABSOLUTE MAXIMUM RATINGS

PHYSICAL/ENVIRONMENTAL

FUNCTIONAL SPECIFICATIONS

(TA = +25°C, ±VCC = ±15V, ±VDD = ±5V, 1MHz sampling rate, and a minimum 1 minute warm-up ➀ unless otherwise specified.)

ADS-937

3

® ®

+25°C 0 to +70°C –55 to +125°C

ANALOG OUTPUT MIN. TYP. MAX. MIN. TYP. MAX. MIN. TYP. MAX. UNITS

Internal Reference

Voltage +4.95 +5.0 +5.05 +4.95 +5.0 +5.05 +4.95 +5.0 +5.05 Volts
Drift — ±30 — — ±30 — — ±30 — ppm/°C

External Current — 1 — — 1 — — 1 — mA

DIGITAL OUTPUTS

Logic Levels

Logic "1" +2.4 — — +2.4 — — +2.4 — — Volts
Logic "0" — — +0.4 — — +0.4 — — +0.4 Volts
Logic Loading "1" — — –4 — — –4 — — –4 mA
Logic Loading "0" — — +4 — — +4 — — +4 mA

Output Coding

Complementary Binary / Complementary Offset Binary

POWER REQUIREMENTS

Power Supply Ranges

+15V Supply +14.5 +15.0 +15.5 +14.5 +15.0 +15.5 +14.5 +15.0 +15.5 Volts
–15V Supply –14.5 –15.0 –15.5 –14.5 –15.0 –15.5 –14.5 –15.0 –15.5 Volts
+5V Supply +4.75 +5.0 +5.25 +4.75 +5.0 +5.25 +4.75 +5.0 +5.25 Volts
–5V Supply –4.75 –5.0 –5.25 –4.75 –5.0 –5.25 –4.75 –5.0 –5.25 Volts

Power Supply Currents

+15V Supply — +7 +9 — +7 +9 — +7 +9 mA
–15V Supply — –8 –10 — –8 –10 — –8 –10 mA
+5V Supply — +133 +145 — +133 +145 — +133 +145 mA
–5V Supply — –72 –80 — –72 –80 — –72 –80 mA

Power Dissipation — 1.25 1.35 — 1.25 1.35 — 1.25 1.35 Watts
Power Supply Rejection — — ±0.01 — — ±0.01 — — ±0.01 %FSR/%V

THERMAL REQUIREMENTS

All DATEL sampling A/D converters are fully characterized and
specified over operating temperature (case) ranges of 0 to
+70°C and –55 to +125°C. All room-temperature (T

A = +25°C)

production testing is performed without the use of heat sinks or
forced-air cooling. Thermal impedance figures for each device
are listed in their respective specification tables.

These devices do not normally require heat sinks, however,
standard precautionary design and layout procedures should be
used to ensure devices do not overheat. The ground and power
planes beneath the package, as well as all pcb signal runs to
and from the device, should be as heavy as possible to help
conduct heat away from the package. Electrically-insulating,
thermally-conductive "pads" may be installed underneath the
package. Devices should be soldered to boards rather than
"socketed", and of course, minimal air flow over the surface can
greatly help reduce the package temperature.

TECHNICAL NOTES

1. Obtaining fully specified performance from the ADS-937
requires careful attention to pc-card layout and power
supply decoupling. The device's analog and digital ground
systems are not connected to each other internally. For
optimal performance, tie all ground pins (2, 12 and 13)
directly to a large analog ground plane beneath the
package.

Bypass all power supplies and the +5V REFERENCE
OUTPUT (pin 5) to ground with 4.7µF tantalum capacitors in
parallel with 0.1µF ceramic capacitors. Locate the bypass
capacitors as close to the unit as possible. Tie a 47µF
capacitor between COMPENSATION (pin 7) and ground
(See figure 2.).

2. The ADS-937 achieves its specified accuracies without the
need for external calibration. If required, the device's small
initial offset and gain errors can be reduced to zero using
the adjustment circuitry shown in Figure 2. When using this
circuitry, or any similar offset and gain calibration hardware,
make adjustments following warm-up. To avoid interaction,
always adjust offset before gain. Float pins 4 and 6 if not
using offset and gain adjust circuits.

Footnotes:

➄ This is the time required before the A/D output data is valid once the analog input

is back within the specified range.

6.02

(SNR + Distortion) – 1.76 + 20 log

Full Scale Amplitude

Actual Input Amplitude

➀ All power supplies must be on before applying a start convert pulse. All

supplies and the clock (START CONVERT) must be present during warm-up
periods. The device must be continuously converting during this time.

➁ Contact DATEL for other input voltage ranges.
➂ A 1MHz clock with a 500nsec positive pulse width (50% duty cycle) is used for

all production testing. Any duty cycle may be used as long as a minimum
positive pulse width of 20nsec is maintained. For applications requiring lower
sampling rates, clock frequencies less than 1MHz may be used.

➃ Effective bits is equal to:

3. Applying a start convert pulse while a conversion is in
progress (EOC = logic "1") will initiate a new and inaccurate
conversion cycle. Data for the interrupted and subsequent
conversions will be invalid.

ADS-937

4

® ®

3. For a bipolar input - Adjust the offset potentiometer until the
output code flickers equally between 1000 0000 0000 0000
and 0111 1111 1111 1111.

For a unipolar input - Adjust the offset potentiometer until
all output bits are 0's and the LSB flickers between 0 and 1.

Gain Adjust Procedure

1. Apply –4.999771V to the ANALOG INPUT (pin 1) for
bipolar gain adjust or apply –9.999771V to pin 1 for
unipolar gain adjust.

2. For a unipolar input - Adjust the gain potentiometer until all
output bits are 1's and the LSB flickers between 1 and 0.

For a bipolar input - Adjust the gain potentiometer until all
output bits are 1's and the LSB flickers between 1 and 0.

3. To confirm proper operation of the device, vary the applied
input voltage to obtain the output coding listed in Table 2.

UNIPOLAR INPUT VOLTAGE INPUT RANGE BIPOLAR

SCALE 0 to –10V MSB LSB MSB LSB ±5V SCALE

–FS +1 LSB –9.999847 1111 1111 1111 1111 0000 0000 0000 0000 +4.999847 +FS –1 LSB

–7/8 FS –8.750000 1110 0000 0000 0000 0001 1111 1111 1111 +3.750000 +3/4 FS
–3/4 FS –7.500000 1100 0000 0000 0000 0011 1111 1111 1111 +2.500000 +1/2 FS
–1/2 FS –5.000000 1000 0000 0000 0000 0111 1111 1111 1111 +0.000000 0
–1/4 FS –2.500000 0100 0000 0000 0000 1011 1111 1111 1111 –2.500000 –1/2 FS
–1/8 FS –1.250000 0010 0000 0000 0000 1101 1111 1111 1111 –3.750000 –3/4 FS

–1 LSB –0.000153 0000 0000 0000 0001 1111 1111 1111 1110 –4.999847 –FS +1 LSB

0 0.000000 0000 0000 0000 0000 1111 1111 1111 1111 –5.000000 –FS

OUTPUT CODING

COMPLEMENTARY

BINARY

COMPLEMENTARY

OFFSET BINARY

Table 2. Output Coding

CALIBRATION PROCEDURE

Connect the converter per Table 1 for the appropriate input
voltage range. Any offset/gain calibration procedures should
not be implemented until the device is fully warmed up. To
avoid interaction, adjust offset before gain. The ranges of
adjustment for the circuits in Figure 2 are guaranteed to
compensate for the ADS-937's initial accuracy errors and may
not be able to compensate for additional system errors.

A/D converters are calibrated by positioning their digital
outputs exactly on the transition point between two adjacent
digital output codes. This is accomplished by connecting
LED's to the digital outputs and performing adjustments until
certain LED's "flicker" equally between on and off. Other
approaches employ digital comparators or microcontrollers to
detect when the outputs change from one code to the next.

For the ADS-937, offset adjusting is normally accomplished
when the analog input is 0 minus ½LSB (–76.3µV). See Table
2 for the proper bipolar and unipolar output coding.

Gain adjusting is accomplished when the analog input is at
nominal full scale minus 1½LSB's (–9.999771V for unipolar
and –4.999771V for bipolar).

Zero/Offset Adjust Procedure

1. Apply a train of pulses to the START CONVERT input
(pin 16) so that the converter is continuously converting.

2. For unipolar or bipolar zero/offset adjust, apply –76.3µV to
the ANALOG INPUT (pin 1).

INPUT VOLTAGE INPUT TIE

RANGE PIN TOGETHER

±5V Pin 1 Pins 2 and 3

0 to –10V Pin 1 Pins 3 and 5

Table 1. Input Connections

ADS-937

5

® ®

Figure 3. ADS-937 Timing Diagram

Figure 2. Typical ADS-937 Connection Diagram

Scale is approximately 50ns per division.

START

CONVERT

INTERNAL S/H

N

N+1

500ns typ.

Acquisition Time

260ns typ.

740ns typ.

5ns typ.

EOC

65ns typ.

Conversion Time

730ns typ.

OUTPUT

DATA

Data N-2 Valid

980ns typ.

Hold

Data N-1 Valid

20ns typ.

20ns

Invalid Data

N

Note: Scale is approximately 50ns per division. Sampling Rate = 1MHz.

2

11

ADS-937

20k

Ω

10

32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17

BIT 1 (MSB)
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
BIT 8
BIT 9
BIT 10
BIT 11
BIT 12
BIT 13
BIT 14
BIT 15
BIT 16 (LSB)

+5V ANALOG

15

ANALOG
GROUND

ANALOG
GROUND

DIGITAL
GROUND

0.1µF

4.7µF

0.1µF

UNIPOLAR

+

4.7µF

+5V
REF. OUT

COMPENSATION

47µF

14

13

3

5

7

START CONVERT

+5V DIGITAL

–15V

+15V

OFFSET
ADJUST

GAIN

ADJUST

46

16

0.1µF

4.7µF

12

9

0.1µF

4.7µF

8

+ +

0.1µF

4.7µF

0.1µF

4.7µF
+

+

EOC

–5V ANALOG

+15V

–15V

ANALOG INPUT

1

Pin 5 (ADS-937)

10k

Ω

ADS-937

6

® ®

ADS-937

® ®

Figure 4. FFT Analysis of ADS-937

Figure 5. ADS-937 Histogram and Differential Nonlinearity

Digital Output Code0

65,536

Number of Occurrences

0

65,536

– 0.50

Codes

DNL (LSB's)

0.63

0

–10
–20
–30
–40
–50
–60
–70
–80

–90
–100
–110
–120
–130
–140
–150

0 50050 100 150 200 250 300 350 400 450

kHz kHz kHz kHz kHz kHz kHz kHz kHz kHz

Frequency

(fs = 1MHz, fin = 480kHz, Vin = – 0.5dB, 16,384-point FFT)

Amplitude Relative to Full Scale (dB)

ADS-937

7

®®

Figure 6. ADS-937 Evaluation Board

JPR3

"OFFSET ADJ."

"GAIN ADJ."

23

1

AMPLIFIER

OPTION

3

2

1

(MSB)

(LSB)

CONVERT

JPR2

+

+

+

10uF

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

AIN

AGND

UNIPOLAR

OFFSET ADJ.

REF. OUT

GAIN ADJ

COMP.

–15VA

+15VA

+5VA

-5VA

AGND

DGND

+5VD

EOC

(LSB) BIT16

(MSB) BIT1

BIT2

BIT3

BIT4

BIT5

BIT6

BIT7

BIT8

BIT9

BIT10

BIT11

BIT12

BIT13

BIT14

BIT15

ADS-937

+

+

+

14

7

3

2

1

8

10

9

11

13

12

6

5

4

14 8

71

+

+

7

6

3

2

2

1

1

3

5

7

9

11

13

15

17

19

21

23

25

27

29

31

33

2

4

6

8

10

12

14

16

18

20

22

24

26

28

32

1

12

13

14

15

16

17

18

19

20

10

11

9

8

7

6

5

4

3

2

34

1

12

13

14

15

16

17

18

19

20

10

11

9

8

7

6

5

4

3

2

30

1D2D3D4D5D6D7D8DLE

1Q

2Q3Q4Q5Q6Q7Q8Q

OC

1D2D3D4D5D6D7D8DLE

1Q

2Q3Q4Q5Q6Q7Q8Q

OC

C26

C27

C29

C24

U3

U3

U3

4

R6

P3

U3

X1

C10

C21

C9

C7

C18

C6

C5

C15

C4

C28

C25

SG3

SG4

C11

R1

C22

AR1

R2

SG1

SG2

C3

C2

C1

P2P2P2P2P2P2P2P2P2P2P2P2P2P2P2P2P2P2P2P2P2P2P2P2P2P2P2P2P2P2P2P2U1P2U2P2

OPT

START

BIT16

EOC

+5VD

+5VD

+15V

–15V

+15V

–15V

+15V

74HCT573

74HCT573

0.1uF

OPT

10uF

10uF

51

0.1uF

10uF

0.1uF

0.1uF

10uF

0.1uF

0.1uF

10uF

0.1uF

0.1uF

0.1uF

OPT

OPT

OPT

OPT

0.1uF

0.1uF

0.1uF

EXT CLK

BIT15

BIT14

BIT13

BIT12

BIT11

BIT10

BIT9

BIT8

BIT7

BIT6

BIT5

BIT4

BIT3

BIT2

BIT1

AIN

–

4

+

C12

C23

–15V

OPT

OPT

REF

JPR2

R5

20K

R4

20K

C16

22uF

C14 22uF

C17

10uF

C20

+

+5VD

R3

10

N.C.

N.C.

N.C.

P1

26

24

25

23

2119171513

11

22

2018161412

10

864

21

3

975

+5V

+15V

–15V

–5V

+5VD

START

CONVERT

+5VD

+5VD

UUT

+

C19

C8

+5VA

10uF

0.1uF

+

+

ADS-937

® ®

DATEL makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained
herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without notice. The DATEL logo is a registered DATEL, Inc. trademark.

DS-0306C 5/99

MECHANICAL DIMENSIONS INCHES (mm)

ORDERING INFORMATION

OPERATING 32-PIN

MODEL NUMBER TEMP. RANGE PACKAGE
ADS-937MC 0 to +70°C TDIP

ADS-937MM –55 to +125°C TDIP
ADS-937/883 –55 to +125°C TDIP

ACCESSORIES
ADS-B937 Evaluation Board (without ADS-937)

Receptacles for pc board mounting can be ordered through AMP, Inc., Part # 3-331272-8
(Component Lead Socket), 32 required. For availability of MIL-STD-883 product, contact DATEL.

ISO 9001

ISO 9001

REGISTERED

DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151
Tel: [phone] [phone] Fax: [phone]
Internet: www.datel.com Email: [e-mail]
Data Sheet Fax Back: [phone]

DATEL (UK) LTD. Tadley, England Tel: [phone]
DATEL S.A.R.L. Montigny Le Bretonneux, France Tel: [phone]
DATEL GmbH München, Germany Tel: [phone]
DATEL KK Tokyo, Japan Tel: [phone], Osaka Tel: [phone]

® ®

Figure 7. ADS-937 Grounded Input Histogram

This histogram represents the typical
peak-to- peak noise (including quantiza­tion noise) associated with the ADS-937.

Digital Output Code

0.00

4000

3000

2000

1000

5000

1.62 MAX.
(41.15)

0.92 MAX.
(23.37)

0.018 TYP.
(0.46)

1.50 TYP
(38.10)

0.100 TYP.
(2.54)

0.05 TYP.
(1.27)

0.175 TYP
(4.45)

0.05 TYP.
(1.27)

0.220 TYP.
(6.86)

0.90 TYP.
(22.86)

0.010 TYP.
(0.254)

Dimension Tolerances
(unless otherwise indicated):

2 place decimal (.XX) ±0.010 (±0.254)
3 place decimal (.XXX) ±0.005 (±0.127)

Lead Material: Kovar Alloy
Lead Finish: 50 microinches (minimum)

gold plating over 100 microinches
(nominal) nickel plating

PIN 1 INDEX

0.05 TYP.

(1.27)

SEATING PLANE