ADC-HZ12BMC

ADC-HX, ADC-HZ Series 12-Bit, 8 and 20μsec Analog-to-Digital Converters PRODUCT OVERVIEW The ADC-HX and ADC-HZ Series are selfcontained, high-performance, 12-bit A/D converters manufactured with thick and thin-film hybrid technology. They use the successive approximation conversion technique to achieve a 12-bit conversion in 20 and 8 microseconds, respectively. Five input voltage ranges are programmable by external pin connection. An internal buffer amplifier is also provided for applications in which 50 megohm input impedance is required. These converters utilize a fast 12-bit monolithic DAC which includes a precision zener reference source. The circuit also contains a fast monolithic comparator, a monolithic 12-bit successive approximation register, a clock and a monolithic buffer amplifier. Nonlinearity is specified at ±1/2LSB maximum. Both models have identical operation except for conversion speed. They can be short-cycled to give faster conversions in lower-resolution applications. Use of the internal buffer amplifier increases conversion time by 3 microseconds, the settling time of the amplifier. Output coding is complementary binary, complementary offset binary, or complementary two’s complement. Serial data is also brought out. The package is a 32-pin ceramic TDIP. Models are available for use in either commercial (0 to +70°C) or military (–55 to +125°C) operating temperature ranges. MIL-STD-883 and DESC Standard Military Drawing models are also available. INPUT/OUTPUT CONNECTIONS Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 +15V POWER 28 –15V POWER 31 BUFFER AMPLIFIER 6.3k PRECISION REF (+6.3V) GAIN 27 ADJUST REF. OUT 18 +5V POWER 16 FEATURES FEATURES S 12-bit resolution 8 or 20 microsecond conversion times 5 input voltage ranges Internal high Z input buffer Short-cycle operation MIL-STD-883 models available Function BIT 12 (LSB) BIT 11 BIT 10 BIT 9 BIT 8 BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 (MSB) BIT 1 (MSB) SHORT CYCLE DIGITAL COMMON +5V POWER Pin 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 Function SERIAL DATA OUTPUT –15V POWER BUFFER INPUT BUFFER OUTPUT +15V POWER GAIN ADJUST ANALOG COMMON 20V INPUT RANGE 10V INPUT RANGE BIPOLAR OFFSET COMPARATOR INPUT START CONVERT E.O.C. (STATUS) CLOCK OUT REFERENCE OUT CLOCK RATE BUFFER 30 INPUT + BUFFER 29 OUTPUT BIPOLAR 23 OFFSET COMPARATOR 22 INPUT 5k 10V 24 INPUT 5k 20V 25 INPUT ANALOG 26 COMMON 　 12-BIT DAC COMPARATOR 15 DIGITAL COMMON 14 SHORT CYCLE SUCCESSIVE APPROXIMATION REGISTER CLOCK 20 E.O.C. STATUS 17 CLOCK RATE 19 CLOCK OUT 21 START CONV. 1 2 3 10 4 9 5 8 6 7 7 6 8 5 9 10 11 12 4 3 2 13 1 12 11 LSB. 1 For full details go to www.murata-ps.com/rohs BIT NO. MSB MSB 32 SERIAL DATA OUT PARALLEL DATA OUT Figure 1. Functional Block Diagram www.murata-ps.com Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 MDA_ADCHXHZ.B01 Page 1 of 6 ADC-HX, ADC-HZ Series 12-Bit, 8 and 20μsec Analog-to-Digital Converters ABSOLUTE MAXIMUM RATINGS PARAMETERS +15V Supply, Pin 28 –15V Supply, Pin 31 +5V Supply, Pin 16 Digital Inputs, Pins 14, 21 Analog Inputs, Pins 24, 25 Buffer Input, Pin 30 Lead Temperature (10 seconds) POWER REQUIREMENTS UNITS Volts Volts Volts Volts Volts Volts °C Power Supply Voltages –15V ±0.5V at –25mA +5V ±0.25V at +85mA +15V ±0.5V at +20mA LIMITS +18 –18 +7 ±5.5 ±25 ±15 300 PHYSICAL/ENVIRONMENTAL Operating Temp. Range, Case Storage Temperature Range Package Type Weight Thermal Impedance JC JA 0 to +70°C or –55 to +125°C –65 to +150°C 32-pin ceramic TDIP 0.5 ounces (14 grams) 6°C/W 30°C/W Functional Specifications (Typical at +25°C and ±15V and +5V supplies unless otherwise noted) INPUTS Analog Input Ranges Unipolar Bipolar Input Impedance 5k (0 to +10V, ±5V) 10k (±10V) Input Impedance with Buffer Input Bias Current of Buffer Start Conversion ADC-HX12B 0 to +5V, 0 to +10V ±2.5V, ±5V, ±10V 2.5k (0 to +5V, ±2.5V) ADC-HZ12B Footnotes: Adjustable to zero. FSR is full scale range and is 10V for 0 to +10V or ±5V inputs and 20V for ±10V input, etc. Without buffer amplifier used. ADC-HZ may require external adjustment of clock rate. Short cycled operation. All digital outputs can drive 2 TTL loads. 50 megohms 125nA typical, 250nA max. +2V min. to +5.5V max. positive pulse with duration of 100ns min. Rise and fall times