The AD667 is a complete voltage output 12-bit digital-to-analog converter including a high stability buried Zener voltage reference and double-buffered input latch on a single chip. The converter uses 12 precision high speed bipolar current steering switches and a laser trimmed thin-film resistor network to provide fast settling time and high accuracy.
Microprocessor compatibility is achieved by the on-chip double-buffered latch. The design of the input latch allows direct interface to 4-, 8-, 12-, or 16-bit buses. The 12 bits of data from the first rank of latches can then be transferred to the second rank, avoiding generation of spurious analog output values. The latch responds to strobe pulses as short as 100 ns, allowing use with the fastest available microprocessors.
The functional completeness and high performance in the AD667 results from a combination of advanced switch design, high speed bipolar manufacturing process, and the proven laser wafer-trimming (LWT) technology. The AD667 is trimmed at the wafer level and is specified to ±1/4 LSB maximum linearity error (K, B grades) at +25°C and ±1/2 LSB over the full operating temperature range.
The subsurface (buried) Zener diode on the chip provides a low noise voltage reference which has long-term stability and temperature drift characteristics comparable to the best discrete reference diodes. The laser trimming process which provides the excellent linearity, is also used to trim the absolute value of the reference as well as its temperature coefficient. The AD667 is thus well suited for wide temperature range performance with ±1/2 LSB maximum linearity error and guaranteed monotonicity over the full temperature range. Typical full-scale gain TC is 5 ppm/°C.
The AD667 is available in five performance grades. The AD667J and K are specified for use over the 0°C to +70°C temperature range and are available in a 28-pin molded plastic DIP (N) or PLCC (P) package. The AD667S grade is specified for the -55°C to +125°C range and is available in the ceramic DIP (D) or LCC (E) package. The AD667A and B are specified for use over the -25°C to +85°C temperature range and are available in a 28-pin hermetically sealed ceramic DIP (D) package.
Features and Benefits
| Digital to Analog Converters |
| Document | note |
| AD667: Microprocessor-Compatible 12-Bit D/A Converter Data Sheet (Rev. A) | PDF 327 kB |
| AD667 Military Data Sheet (Rev. 0) AD667: Standard Military Drawing (Rev B, 2/2002) | PDF 140 kB |
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|---|---|---|---|---|---|
| 5962-88659013A Production | LCC:CER LEADLESS CHIP CARR | OTH 42 | -55 to 125C | 179.78 | 162.5 | N |
| 5962-8865901XA Production | S/B OR B/B CERAMIC DIP | OTH 13 | -55 to 125C | 151.95 | 137.37 | N |
| AD667AD Production | 28 ld Side-Brazed CerDIP | OTH 13 | -25 to 85C | 18.32 | 16.59 | N |
| AD667BD Production | 28 ld Side-Brazed CerDIP | OTH 13 | -25 to 85C | 24.29 | 21.77 | N |
| AD667JCHIPS Production | CHIPS OR DIE | REEL 49 | 25C | 13.41 | 13.41 | Y |
| AD667JNZ Production | 28 ld PDIP (600mil) | OTH 13 | 0 to 70C | 15.25 | 12.58 | Y |
| AD667JP Production | PLCC:PLASTIC LEAD CHIP CAR | OTH 39 | 0 to 70C | 14.55 | 12.01 | N |
| AD667JP-REEL Production | PLCC:PLASTIC LEAD CHIP CAR | REEL 750 | 0 to 70C | 0 | 12.01 | N |
| AD667JPZ Production | PLCC:PLASTIC LEAD CHIP CAR | OTH 39 | 0 to 70C | 13.86 | 11.44 | Y |
| AD667JPZ-REEL Production | PLCC:PLASTIC LEAD CHIP CAR | REEL 750 | 0 to 70C | 0 | 11.44 | Y |
| AD667KNZ Production | 28 ld PDIP (600mil) | OTH 13 | 0 to 70C | 21.34 | 17.97 | Y |
| AD667KP Production | PLCC:PLASTIC LEAD CHIP CAR | OTH 39 | 0 to 70C | 20.37 | 17.16 | N |
| AD667KPZ Production | PLCC:PLASTIC LEAD CHIP CAR | OTH 39 | 0 to 70C | 19.4 | 16.34 | Y |
| AD667KPZ-REEL Production | PLCC:PLASTIC LEAD CHIP CAR | REEL 750 | 0 to 70C | 0 | 16.34 | Y |
| AD667SD Production | 28 ld Side-Brazed CerDIP | OTH 13 | -55 to 125C | 89.86 | 89.86 | N |
| AD667SD/883B Production | 28 ld Side-Brazed CerDIP | OTH 13 | -55 to 125C | 136.35 | 116.25 | N |
| AD667SE Production | LCC:CER LEADLESS CHIP CARR | OTH 42 | -55 to 125C | 114.1 | 114.1 | Y |
| AD667SE/883B Production | LCC:CER LEADLESS CHIP CARR | OTH 42 | -55 to 125C | 171.42 | 146.3 | N |
