SHM-14

®

®

INPUTS

MIN.

TYP.

MAX.

UNITS

Input Voltage Range

–2.5

—

+2.5

Volts

Input Impedance

0.3

1

—

M

Ω

Digitals Inputs (Balanced ECL)

Logic Levels

Logic 1

–1.5

—

+1.8

Volts

Logic 0

–2.5

—

+0.8

Volts

Logic Loading

Logic 1

—

+10

+50

µA

Logic 0

—

–30

–150

µA

Output Voltage Range

–2.5

—

+2.5

Volts

Output Current

•

± 30

—

—

mA

Output Impedance (dc)

—

0.3

1

Ω

Stable Capacitive Load

—

—

50

pF

Nonlinearity (±1V)

+25°C

—

±0.0012

—

%

–40 to +85°C

—

—

±0.002

%

–55 to +125°C

—

—

±0.003

%

Sample Mode Offset

+25°C

—

±12

—

mV

–40 to +85°C

—

—

±20

mV

–55 to +125°C

—

—

±30

mV

Pedestal

+25°C

—

±3

—

mV

–40 to +85°C

—

—

±20

mV

–55 to +125°C

—

—

±20

mV

Gain, +25°C

+0.98

+0.995

—

V/V

Gain Drift (±1V)

–40 to +85°C

—

—

±20

ppm/°C

–55 to +125°C

—

—

±30

ppm/°C

Aperture Delay

–40 to +85°C

—

2

—

ns

–55 to +125°C

—

2

—

ns

Aperture Jitter

–40 to +85°C

—

1

—

ps rms

–55 to +125°C

—

1

—

ps rms

Harmonic Distortion (±1V)

dc to 1MHz

—

–72

—

dB

dc to 10MHz

+25°C

—

–58

—

dB

–40 to +85°C

—

—

–50

dB

–55 to +125°C

—

—

–48

dB

Acquisition Time (±0.012%, ±2V)

–40 to +85°C

—

25

—

ns

–55 to +125°C

—

35

—

ns

Acquisition Time (±0.024%, ±2V)

–40 to +85°C

—

20

35

ns

–55 to +125°C

—

25

40

ns

Acquisition Time (±0.05%, ±2V)

–40 to +85°C

—

19

30

ns

–55 to +125°C

—

20

35

ns

ABSOLUTE MAXIMUM RATINGS

PARAMETERS

LIMITS

UNITS

+5V Supply

0 to +6

Volts

–5V Supply

0 to –6

Volts

Analog Input

+5V Supply –1

Volts

–5V Supply +1

Volts

Continuous Output Current

±50

mA

Digital Inputs

<Supply Voltages

Volts

Junction Temperature

+175

°C

Lead Temperature (10 seconds)

+300

°C

Output shorted to any supply will cause permanent damage.

OUTPUTS

PERFORMANCE

FUNCTIONAL SPECIFICATIONS

(Apply over the operating temperature range using a 100

Ω resistive load, 10pF

capacitive load, ECL digital input levels, and ±5V nominal supplies, unless specified.)

TECHNICAL NOTES

The SHM-14 employs an open loop architecture in order to

achieve its superior high-speed characteristics. The first stage

buffer amplifier, which charges the hold capacitor, incorporates the

sample-and-hold switch into its design. This technique allows for a

fast acquisition time which is not limited by slew current like the

traditional Schottky diode bridge switch. The output amplifier uses

a closed loop voltage feedback design which provides a low (0.3

Ω,

typical) output impedance. Gain and linearity are not affected by

heavy loads.

The design has been optimized to achieve the high accuracy associ-

ated with fast transient responses over the full military temperature

range. During the track-to-hold transient, the integral nonlinearity is

not affected and the pedestal remains constant over the full ±2.5V

input range.

An external hold capacitor can be added to the 15pF internal hold

capacitor to obtain a lower droop rate (the droop rate is propor-

tional to the inverse of the total hold capacitor value) without

increasing transient response times by more than few ns. Settling

and acquisition times are typically increased by 5ns and 10ns

respectively for 47pF and 100pF external hold capacitors. The

external hold capacitor should not exceed 100pF.

Acquisition Time (±0.1%, ±2V)

–40 to +85°C

—

10

16

ns

–55 to +125°C

—

10

19

ns

Hold Mode Settling (±0.012%)

–40 to +85°C

—

12

—

ns

–55 to +125°C

—

15

—

ns

Hold Mode Settling (±0.024%)

–40 to +85°C

—

7

18

ns

–55 to +125°C

—

7

18

ns

Hold Mode Settling (±0.05%)

–40 to +85°C

—

6

16

ns

–55 to +125°C

—

6

16

ns

Hold Mode Settling (±0.1%)

–40 to +85°C

—

5

12

ns

–55 to +125°C

—

5

12

ns

Slew Rate

±300

±430

—

V/µs

Full Power Bandwidth (±1V)

45

70

—

MHz

Small Signal Bandwidth

100

250

—

MHz

Output Noise, Hold Mode

—

65

—

µVrms

Feedthrough (2V Step)

—

–80

—

dB

Droop Rate

+25°C

—

±2

±6

mV/µs

–40 to +85°C

—

±5

±15

mV/µs

–55 to +125°C

—

±10

±30

mV/µs

Power Supply Range

+5V Supply

+4.5

+5

+5.5

Volts

–5V Supply

–5.5

–5

–4.5

Volts

Power Supply Current

+5V Supply

+17

+25

+30

mA

–5V Supply

–17

–25

–30

mA

Power Dissipation

170

250

300

mW

Power Supply Rejection Ratio

40

60

—

dB

Operating Temp. Range, Case

SHM-14S, SHM-14L

–40

—

+85

°C

SHM-14LM

–55

—

+125

°C

Storage Temperature Range

–65

—

+150

°C

Package Type

SHM-14S

16-Pin plastic SOIC

SHM-14L, SHM-14LM

20-Pin ceramic LCC

Footnotes:

• Short circuit protection at ±50mA.

ENVIRONMENTAL

POWER SUPPLY REQUIREMENTS

PERFORMANCE (Cont.)

MIN.

TYP.

MAX. UNITS

2