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Technical content
DATEL’s SHM-49 is a high-speed, highly accurate sample/hold designed for precision, high-speed analog signal processing applications. The SHM-49 features excellent dynamic specifi cations including a maximum acquisition time of only 200 nanoseconds for a 10V step to ±0.01%. Sample-to-hold settling time, to ±0.01% accuracy, is 100 nanoseconds maximum with an aperture uncertainty of ±2 picoseconds. The SHM-49 is a complete sample/hold circuit, containing a preci- sion MOS hold capacitor and a MOSFET switching confi guration which results in faster switching and better feedthrough attenuation. Addition- ally, a FET input amplifi er design allows faster acquisition and settling times while maintaining a considerably lower droop rate. –15V SUPPLY +15V SUPPLY POWER GROUND SWITCH DRIVER
6 ANALOG OUTPU T
2kΩ ANALOG INPUT S/H CONTROL +5V SUPPLY ANALOG RETURN 51 7 2kΩ 100pF INPUT/OUTPUT CONNECTIONS Pin Function 1 +5v Digital Supply 2 S/ H Control
3 Analog Input
4 Analog Return
5 –15v Supply
6 Analog Output
8 Power Ground
Figure 1. Functional Block Diagram
FEATURES
Small 8-pin DIP or SMT package 200ns max. acquisition time to ±0.01% 100ns max. sample-to-hold settling time to ±0.01% 16MHz small signal bandwidth 74dB feedthrough attenuation ±25 picoseconds aperture uncertainty 415mW maximum power dissipation SHM-49 Miniature, High-Speed, Complete ±0.05% Sample Hold Amplifi ers 23 Jul 2015 MDC_SHM-49.C01 Page 1 of 3 DATEL, Inc. 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
±15V Supply Voltages ±18V +5V Supply Voltages –0.5V to +7V Analog Input ±18V Digital Input –0.5V to +5.5V Output Current ±65 mA Functional Specifi cations (Apply over the operating temperature range with ±15V and +5V supplies unless otherwise specifi ed.) POWER REQUIREMENTS MIN. TYP. MAX. UNITS Voltage Range +15V Supply +11.5 +15.0 +15.5 Volts –15V Supply –11.5 –15.0 –15.5 Volts +5V Supply +4.75 +5.0 +5.25 Volts Power Supply Rejection Ratio — ±0.5 ±1 mV/V Quiescent Current Drain +15V Analog Supply — +12 +13.5 mA –15V Supply — –12 –13.5 mA +5V Supply — +1 +1.5 mA Power Consumption — 365 415 mW PHYSICAL/ENVIRONMENTAL Operating Temp. Range, Case SHM-49MC/GC 0 to +70°C SHM-49MM/GM –55 to +125°C Storage Temperature Range –65 to +150°C Thermal Impedance θjc 15°C/W θca 35°C/W Package Type 8-pin ceramic DIP (MC/MM) or SMT (GC/GM) Footnotes: ➀ Full Scale (FS) = 10V. Full Scale Range (FSR) = 20V. ➁ Sample-to-hold offset error (pedestal) is constant regardless of input/output level. TECHNICAL NOTES 1. All ground pins should be tied together and connected to system analog ground as close to the package as possible. It is recommended to use a ground plane under the device and solder ground pins directly to it. Take care to ensure that no ground potentials can exist between ground pins. 2. External 0.1μF to 4.7μF tantalum bypass capacitors are required in critical applications. 3. A logic 1 on S/H puts the unit in the sample mode. A logic 0 puts the unit in hold mode. 4. The maximum capacitive load to avoid oscillation is typically 250pF. Recom- mended resistive load is 500Ω, although values as low as 250Ω may be used. Acquisition and sample-to-hold settling times are relatively unaffected by resistive loads down to 250Ω and capacitive loads up to 50pF. Greater load capacitances will affect both acquisition and settling time. 5. Gain and offset adjusting can be accomplished using the external circuitry shown in Figure 2. Adjust offset with a 0V input. Adjust gain with a ±FS input. Adjust so that the output in the hold mode matches the input. ANALOG INPUT/OUTPUT MIN. TYP. MAX. UNITS Input/Output Voltage Range ±15V Nominal Supply ±10 ±11.5 — Volts ±12V Nominal Supply ±7 ±8.5 — Volts Input Impedance — 2000 — Ω Output Current — — ±40 mA Output Impedance — 0.1 — Ω Capacitive Load 100 250 — pF DIGITAL INPUT Input Logic Levels Logic 1 +2.0 — +5.0 Volts Logic 0 0 — +0.8 Volts Loading Logic 1 — — +5 μA Logic 0 — — –5 μA TRANSFER CHARACTERISTICS Gain — –1 — V/V Gain Error, +25°C ±0.05 ±0.5 — % Linearity Error ➀ — ±0.005 ±0.01 %FS Sample Mode Offset , +25°C — ±2 ±7 mV Sample-to-Hold Offset (Pedestal), +25°C ➁ — ±2.5 ±25 mV Gain Drift — ±0.5 ±15 ppm/°C Sample Mode Offset Drift ➀ — ±3 ±15 ppm of FSR/°C Sample-to-Hold Off. (Pedestal) Drift — ±5 ±20 ppm of FSR/°C DYNAMIC CHARACTERISTICS Acquisition Time 10V to ±0.01%FS (±1 mV) +25°C — 160 200 ns –55 to +125°C — — 265 ns 10V to ±0.1%FS (±10 mV) +25°C — 100 150 ns –55 to +125°C — — 215 ns 10V to ±0.01%FS (±100 mV) — 90 — ns 1V to ±1%FS (±10 mV) — 75 — ns Sample-to-Hold Settling Time 10V to ±1%FS (±100 mV) — 60 100 ns 1V to ±0.01%FS (±10 mV) — 40 80 ns Sample-to-Hold Transient — 100 — mVp-p Aperture Delay Time — 10 15 ns Aperture Uncertainty (Jitter) — ±25 ±50 ps Output Slew Rate ±200 ±300 — V/ μs Small Signal BW (–3dB) 10 16 — MHz Output Droop +25°C — 0.5 15 μV/μs 0 to +70°C — 15 30 μV/μs –55 to +125°C — 1.2 2.4 mV/ μs Feedthrough Rejection 69 74 — dB
ORDERING INFORMATION
Model Number Operating Temp. Range Package RoHS SHM-49MC 0 to +70°C DIP No SHM-49ME -40 to +100°C DIP No SHM-49MM -55 to +125°C DIP No SHM-49GC 0 to +70°C SMT No SHM-49GE -40 to +100°C SMT No SHM-49GM -55 to +125°C SMT No SHM-49MC-C 0 to +70°C DIP Yes SHM-49ME-C -40 to +100°C DIP Yes SHM-49MM-C -55 to +125°C DIP Yes SHM-49GC-C 0 to +70°C SMT Yes SHM-49GE-C -40 to +100°C SMT Yes SHM-49GM-C -55 to +125°C SMT Yes For availability of high-reliability versions of the SHM-49, contact DATEL. SHM-49 Miniature, High-Speed, Complete ±0.05% Sample Hold Amplifi ers 23 Jul 2015 MDC_SHM-49.C01 Page 2 of 3 DATEL, Inc. 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
Figure 2. Offset and Gain Adjustments licenses to make, use, or sell equipment constructed in accordance therewith. Specifi cations are subject to change without notice. DATEL is a registered trademark of DATEL, Inc.