12-Bit 100 kSPS a A/D Converter AD1674* FUNCTIONAL BLOCK DIAGRAM FEATURES Complete Monolithic 12-Bit 10 ms Sampling ADC 12/8 On-Board Sample-and-Hold Amplifier CS STS A CONTROL 0 Industry Standard Pinout CE A 8- and 16-Bit Microprocessor Interface R/C AC and DC Specified and Tested 10V AAACLOCKAASAR A REF OUT Unipolar and Bipolar Inputs REF 12 65 V, 610 V, 0 V10 V, 0 V20 V Input Ranges Commercial, Industrial and Military Temperature AAAAAA DB11 (MSB) AGND COMP DB0 (LSB) 20k 12 Range Grades REF IN 12 5k 10k MIL-STD-883 and SMD Compliant Versions Available A BIP OFF 20V 10k DAC IN 5k A 10V IDAC IN 2.5k 5k 2.5k A SHA AD1674 PRODUCT DESCRIPTION PRODUCT HIGHLIGHTS The AD1674 is a complete, multipurpose, 12-bit analog-to- 1. Industry Standard Pinout: The AD1674 utilizes the pinout digital converter, consisting of a user-transparent onboard established by the industry standard AD574A and AD674A. sample-and-hold amplifier (SHA), 10 volt reference, clock and 2. Integrated SHA: The AD1674 has an integrated SHA which three-state output buffers for microprocessor interface. supports the full Nyquist bandwidth of the converter. The The AD1674 is pin compatible with the industry standard SHA function is transparent to the user no wait-states are AD574A and AD674A, but includes a sampling function while needed for SHA acquisition. delivering a faster conversion rate. The on-chip SHA has a wide 3. DC and AC Specified: In addition to traditional dc specifica- input bandwidth supporting 12-bit accuracy over the full tions, the AD1674 is also fully specified for frequency do- Nyquist bandwidth of the converter. main ac parameters such as total harmonic distortion, The AD1674 is fully specified for ac parameters (such as S/(N+D) signal-to-noise ratio and input bandwidth. These parameters ratio, THD, and IMD) and dc parameters (offset, full-scale can be tested and guaranteed as a result of the onboard error, etc.). With both ac and dc specifications, the AD1674 is SHA. ideal for use in signal processing and traditional dc measure- 4. Analog Operation: The precision, laser-trimmed scaling and ment applications. bipolar offset resistors provide four calibrated ranges: The AD1674 design is implemented using Analog Devices 0 V to +10 V and 0 V to +20 V unipolar, 5 V to +5 V and BiMOS II process allowing high performance bipolar analog cir- 10 V to +10 V bipolar. The AD1674 operates on +5 V and cuitry to be combined on the same die with digital CMOS logic. 12 V or 15 V power supplies. Five different temperature grades are available. The AD1674J 5. Flexible Digital Interface: On-chip multiple-mode and K grades are specified for operation over the 0C to +70C three-state output buffers and interface logic allow direct temperature range. The A and B grades are specified from connection to most microprocessors. 40C to +85C the AD1674T grade is specified from 55C to +125C. The J and K grades are available in both 28-lead plastic DIP and SOIC. The A and B grade devices are available in 28-lead hermetically sealed ceramic DIP and 28-lead SOIC. The T grade is available in 28-lead hermetically sealed ceramic DIP. *Protected by U. S. Patent Nos. 4,962,325 4,250,445 4,808,908 RE30586. REV. C 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 617/329-4700 Fax: 617/326-8703 REGISTERS / 3-STATE OUTPUT BUFFERSAD1674SPECIFICATIONS (T to T , V = +15 V 6 10% or +12 V 6 5%, V = +5 V 6 10%, V = 15 V 6 10% or MIN MAX CC LOGIC EE DC SPECIFICATIONS 12 V 6 5% unless otherwise noted) AD1674J AD1674K Parameter Min Typ Max Min Typ Max Unit RESOLUTION 12 12 Bits INTEGRAL NONLINEARITY (INL) 1 1/2 LSB DIFFERENTIAL NONLINEARITY (DNL) (No Missing Codes) 12 12 Bits 1 UNIPOLAR OFFSET +25C 3 2 LSB 1 BIPOLAR OFFSET +25C 6 4 LSB 1, 2 FULL-SCALE ERROR +25C (with Fixed 50 Resistor from REF OUT to REF IN) 0.1 0.25 0.1 0.25 % of FSR TEMPERATURE RANGE 0 +70 0 +70 C 3 TEMPERATURE DRIFT 2 Unipolar Offset 2 1 LSB 2 Bipolar Offset 2 1 LSB 2 Full-Scale Error 6 3 LSB POWER SUPPLY REJECTION V = 15 V 1.5 V or 12 V 0.6 V 2 1 LSB CC V = 5 V 0.5 V 1/2 1/2 LSB LOGIC V = 15 V 1.5 V or 12 V 0.6 V 2 1 LSB EE ANALOG INPUT Input Ranges Bipolar 5 +5 5 +5 Volts 10 +10 10 +10 Volts Unipolar 0 +10 0 +10 Volts 0 +20 0 +20 Volts Input Impedance 10 Volt Span 357357 k 20 Volt Span 6 10 14 6 10 14 k POWER SUPPLIES Operating Voltages +4.5 +5.5 +4.5 +5.5 Volts V LOGIC V +11.4 +16.5 +11.4 +16.5 Volts CC V 16.5 11.4 16.5 11.4 Volts EE Operating Current I 58 58 mA LOGIC I 10 14 10 14 mA CC I 14 18 14 18 mA EE POWER DISSIPATION 385 575 385 575 mW INTERNAL REFERENCE VOLTAGE 9.9 10.0 10.1 9.9 10.0 10.1 Volts 4 Output Current (Available for External Loads) 2.0 2.0 mA (External Load Should Not Change During Conversion NOTES 1 Adjustable to zero. 2 Includes internal voltage reference error. 3 Maximum change from 25C value to the value at T or T . MIN MAX 4 Reference should be buffered for 12 V operation. All min and max specifications are guaranteed. Specifications subject to change without notice. 2 REV. C