SMP04ES

a FEATURES Four Independent Sample-and-Holds Internal Hold Capacitors High Accuracy: 12 Bit Very Low Droop Rate: 2 mV/s typ Output Buffers Stable for C L ≤ 500 pF TTL/CMOS Compatible Logic Inputs Single or Dual Supply Applications Monolithic Low Power CMOS Design APPLICATIONS Signal Processing Systems Multichannel Data Acquisition Systems Automatic Test Equipment Medical and Analytical Instrumentation Event Analysis DAC Deglitching CMOS Quad Sample-and-Hold Amplifier SMP04* FUNCTIONAL BLOCK DIAGRAM VDD SMP04 VIN1 S/H1 VSS VIN2 S/H2 VSS VIN3 S/H3 VSS VIN4 S/H4 VSS VOUT4 VOUT3 VOUT2 VOUT1 VSS DGND GENERAL DESCRIPTION The SMP04 is a monolithic quad sample-and-hold; it has four internal precision buffer amplifiers and internal hold capacitors. It is manufactured in ADI’s advanced oxide isolated CMOS technology to obtain the high accuracy, low droop rate and fast acquisition time required by data acquisition and signal processing systems. The device can acquire an 8-bit input signal to ± 1/2 LSB in less than four microseconds. The SMP04 can operate from single or dual power supplies with TTL/CMOS logic compatibility. Its output swing includes the negative supply. The SMP04 is ideally suited for a wide variety of sample-andhold applications, including amplifier offset or VCA gain adjustments. One or more can be used with single or multiple DACs to provide multiple setpoints within a system. The SMP04 offers significant cost and size reduction over equivalent module or discrete designs. It is available in a 16-lead hermetic or plastic DIP and surface mount SOIC packages. It is specified over the extended industrial temperature range of –40°C to +85°C. *Protected by U.S. Patent No. 4,739,281. REV. D Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 1998 SMP04–SPECIFICATIONS (@ VDD = +12.0 V, VSS = DGND = 0 V, RL = No Load, TA = Operating Temperature Range specified in Absolute Maximum Ratings, unless otherwise noted.) Parameter Linearity Error Buffer Offset Voltage Hold Step Droop Rate Output Source Current 1 Output Sink Current1 Output Voltage Range LOGIC CHARACTERISTICS Logic Input High Voltage Logic Input Low Voltage Logic Input Current DYNAMIC PERFORMANCE Acquisition Time3 Acquisition Time3 Hold Mode Settling Time Slew Rate4 Capacitive Load Stability Analog Crosstalk SUPPLY CHARACTERISTICS Power Supply Rejection Ratio Supply Current Power Dissipation 2 ELECTRICAL CHARACTERISTICS Symbol VOS VHS ∆V/∆t ISOURCE ISINK OVR Conditions VIN = 6 V VIN = 6 V, TA = +25°C to +85°C VIN = 6 V, TA = –40°C VIN = 6 V, TA = +25°C VIN = 6 V VIN = 6 V R L = 20 kΩ R L = 10 kΩ Min –10 Typ 0.01 ± 2.5 2.5 2 Max +10 4 5 25 10.0 9.5 Units % mV mV mV mV/s mA mA V V V V µA µs µs µs µs V/µs pF dB dB mA mW 1.2 0.5 0.06 0.06 2.4 0.5 VINH VINL IIN tAQ tAQ tH SR CL TA = +25°C, 0 V to 10 V Step to 0.1% –40°C ≤ TA ≤ +85°C TA = +25°C, 0 V to 10 V Step to 0.01% To 1 mV R L = 20 kΩ