23757

` Autocalibrating
` On-Chip Sample-Hold Function
` Parallel Output Format
` 16 Bits No Missing Codes 61 LSB INL 97 dB THD 90 dB S/(N+D) 1 MHz Full Power Bandwidth

V_CC to V_EE . . . . . . . . . . . . . . . . . . . . . . . . . .  0.3 V to +26.4 V
V_DD to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +7 V
V_CC to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +18 V
V_EE to AGND . . . . . . . . . . . . . . . . . . . . . . . . . .  18 V to +0.3 V
AGND to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  ±0.3 V
Digital Inputs to DGND . . . . . . . . . . . . . . . . . . . . 0 V to +5.5 V
Analog Inputs, V_REF to AGND . .  (V_CC + 0.3 V) to (V_EE 0.3 V)
Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300, 10 sec
Storage Temperature . . . . . . . . . . . . . . . . .. .. 65 to +150

*Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

The AD676 is a multipurpose 16-bit parallel output analog-todigital converter which utilizes a switched-capacitor/charge  redistribution architecture to achieve a 100 kSPS conversion rate (10 ms total conversion time). Overall performance is optimized by digitally correcting internal nonlinearities through on-chip autocalibration.

The AD676 circuitry is segmented onto two monolithic chips-a digital control chip fabricated on Analog Devices DSP CMOS process and an analog ADC chip fabricated on our BiMOS II process. Both chips are contained in a single package.

The AD676 is specified for ac (or "dynamic") parameters such as S/(N+D) Ratio, THD and IMD which are important in signal processing applications. In addition, dc parameters are specified which are important in measurement applications.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 617/329-4700 Fax: 617/326-8703 The AD676 operates from +5 V and ±12 V supplies and typically consumes 360 mW during conversion. The digital supply (V_DD) is separated from the analog supplies (V_CC, V_EE) for reduced digital crosstalk. An analog ground sense is provided for the analog input. Separate analog and digital grounds are also provided.

The AD676 is available in a 28-pin plastic DIP or 28-pin sidebrazed ceramic package. A serial-output version, the AD677, is available in a 16-pin 300 mil wide ceramic or plastic package.