Details, datasheet, quote on part number: AD574AJD
PartAD574AJD
Category
DescriptionIc-12-bit ADC
CompanyN.A.
DatasheetDownload AD574AJD datasheet
Cross ref.Similar parts: HI1574AJD-5, ADC574AJH, HI1-574AJD-5, ADS774, ADS8504, ADS8505
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Features, Applications

FEATURES Complete 12-Bit A/D Converter with Reference and Clock 8- and 16-Bit Microprocessor Bus Interface Guaranteed Linearity Over Temperature U No Missing Codes Over Temperature 35 s Maximum Conversion Time Buried Zener Reference for Long-Term Stability and Low Gain T.C. 10 ppm/ C max AD574AL 12.5 ppm/ C max AD574AU Ceramic DIP, Plastic DIP or PLCC Package Available in Higher Speed, Pinout-Compatible Versions 10 s (with SHA) AD1674) Available in Versions Compliant with MIL-STD-883 and JAN QPL

+5V SUPPLY VLOGIC DATA MODE SELECT 12/8 CHIP SELECT CS BYTE ADDRESS/ SHORT CYCLE AO READ/CONVERT R/C CHIP ENABLE CE +12/+15V SUPPLY VCC +10V REFERENCE REF OUT ANALOG COMMON AC REFERENCE INPUT REF IN -12/-15V SUPPLY VEE BIPOLAR OFFSET BIP OFF 10V SPAN INPUT 10VIN

STATUS STS DB11 27 MSB DB0 16 LSB 15 DIGITAL COMMON DC DIGITAL DATA OUTPUTS 28

The is a complete 12-bit successive-approximation analog-to-digital converter with 3-state output buffer circuitry for direct interface or 16-bit microprocessor bus. A high precision voltage reference and clock are included on-chip, and the circuit guarantees full-rated performance without external circuitry or clock signals. The AD574A design is implemented using Analog Devices' Bipolar/I2L process, and integrates all analog and digital functions on one chip. Offset, linearity and scaling errors are minimized by active laser-trimming of thin-film resistors at the wafer stage. The voltage reference uses an implanted buried Zener for low noise and low drift. On the digital side, I2L logic is used for the successive-approximation register, control circuitry and 3-state output buffers. The AD574A is available in six different grades. The AD574AJ, K, and L grades are specified for operation over the to +70C temperature range. The AD574AS, T, and U are specified for the to +125C range. All grades are available a 28-pin hermetically-sealed ceramic DIP. Also, the J, K, and L grades are available a 28-pin plastic DIP and PLCC, and the J and K grades are available in ceramic LCC. The S, T, and U grades in ceramic DIP or LCC are available with optional processing to MIL-STD-883C Class B; the T and U grades are available as JAN QPL. The Analog Devices' Military Products Databook should be consulted for details on /883B testing of the AD574A.

1. The AD574A interfaces to most or 16-bit microprocessors. Multiple-mode three-state output buffers connect directly to the data bus while the read and convert commands are taken from the control bus. The 12 bits of output data can be read either as one 12-bit word or as two 8-bit bytes (one with 8 data bits, the other with 4 data bits and 4 trailing zeros). 2. The precision, laser-trimmed scaling and bipolar offset resistors provide four calibrated ranges: 0 volts to +10 volts and 0 volts to +20 volts unipolar, 5 volts to +5 volts and 10 volts to +10 volts bipolar. Typical bipolar offset and full-scale calibration errors 0.1% can be trimmed to zero with one external component each. 3. The internal buried Zener reference is trimmed to 10.00 volts with 0.2% maximum error and 15 ppm/C typical T.C. The reference is available externally and can drive 1.5 mA beyond the requirements of the reference and bipolar offset resistors. AD674B (15 s) and AD774B (8 s) provide higher speed, pin compatibility; AD1674 (10 s) includes on-chip SampleHold Amplifier (SHA).

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: 617/329-4700 Fax: 617/326-8703

Model RESOLUTION LINEARITY ERROR +25 C TMIN to TMAX DIFFERENTIAL LINEARITY ERROR (Minimum Resolution for Which No Missing Codes are Guaranteed) TMIN to TMAX UNIPOLAR OFFSET (Adjustable to Zero) BIPOLAR OFFSET (Adjustable to Zero) FULL-SCALE CALIBRATION ERROR (With Fixed 50 Resistor from REF OUT to REF IN) (Adjustable to Zero) TEMPERATURE RANGE TEMPERATURE COEFFICIENTS (Using Internal Reference) TMIN to TMAX Unipolar Offset Bipolar Offset Full-Scale Calibration POWER SUPPLY REJECTION Max Change in Full-Scale Calibration VCC 0.6 V VLOGIC 0.5 V VEE 0.6 V ANALOG INPUT Input Ranges Bipolar Unipolar Input Impedance 10 Volt Span 20 Volt Span DIGITAL CHARACTERISTICS 1 (TMINTMAX) Inputs2 (CE, CS, R/C, A0) Logic "1" Voltage Logic "0" Voltage Current Capacitance Output (DB11DB0, STS) Logic "1" Voltage (I SOURCE 500 A) Logic "0" Voltage (I SINK 1.6 mA) Leakage (DB11DB0, High-Z State) Capacitance POWER SUPPLIES Operating Range VLOGIC VCC VEE Operating Current ILOGIC ICC IEE POWER DISSIPATION INTERNAL REFERENCE VOLTAGE Output Current (Available for External Loads) 3 (External Load Should not Change During Conversion) PACKAGE OPTIONS 4 Ceramic (D-28) Plastic (N-28) PLCC (P-28A) LCC (E-28A)


NOTES Detailed Timing Specifications appear in the Timing Section. 12/8 Input is not TTL-compatible and must be hard wired to V LOGIC or Digital Common. 3 The reference should be buffered for operation 12 V supplies. D = Ceramic DIP; N = Plastic DIP; P = Plastic Leaded Chip Carrier. Specifications subject to change without notice.

Model RESOLUTION LINEARITY ERROR +25 C TMIN to TMAX DIFFERENTIAL LINEARITY ERROR (Minimum Resolution for Which No Missing Codes are Guaranteed) TMIN to TMAX UNIPOLAR OFFSET (Adjustable to Zero) BIPOLAR OFFSET (Adjustable to Zero) FULL-SCALE CALIBRATION ERROR (With Fixed 50 Resistor from REF OUT to REF IN) (Adjustable to Zero) TEMPERATURE RANGE TEMPERATURE COEFFICIENTS (Using Internal Reference) (TMIN to TMAX) Unipolar Offset Bipolar Offset Full-Scale Calibration POWER SUPPLY REJECTION Max Change in Full-Scale Calibration VCC 0.6 V VLOGIC 0.5 V VEE 0.6 V ANALOG INPUT Input Ranges Bipolar Unipolar Input Impedance 10 Volt Span 20 Volt Span DIGITAL CHARACTERISTICS 1 (TMINTMAX) Inputs2 (CE, CS, R/C, A0) Logic "1" Voltage Logic "0" Voltage Current Capacitance Output (DB11DB0, STS) Logic "1" Voltage (I SOURCE 500 A) Logic "0" Voltage (I SINK 1.6 mA) Leakage (DB11DB0, High-Z State) Capacitance POWER SUPPLIES Operating Range VLOGIC VCC VEE Operating Current ILOGIC ICC IEE POWER DISSIPATION INTERNAL REFERENCE VOLTAGE Output Current (Available for External Loads) 3 (External Load Should not Change During Conversion) PACKAGE OPTION4 Ceramic 9.98 55 Min AD574AS Typ Max 12 1 Min AD574AT Typ Max Min AD574AU Typ Max Units Bits LSB


NOTES 1 Detailed Timing Specifications appear in the Timing Section. 2 12/8 Input is not TTL-compatible and must be hard wired to V LOGIC or Digital Common. 3 The reference should be buffered for operation 12 V supplies. D = Ceramic DIP. Specifications subject to change without notice.


 

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