Siliconix LD121A
The Siliconix LD121A (P/N 156-1305-00) is a 4½ digit integrating ADC (digital section) monolithic integrated circuit in an 18-pin DIP.
Used in
- 7A13 (S/N B0250000 and up, U636, with Siliconix LD122 analog front-end, U637)
- DM501A (A10U1603, with Siliconix LD120 analog front-end)
Some instruments using part Siliconix LD121A
| Instrument | Manufacturer | Class | Model | Description | Introduced |
|---|---|---|---|---|---|
| 7A13 | Tektronix | Plug-in | 7A13 | 100 MHz Differential Comparator | 1969 |
| DM501A | Tektronix | Plug-in | DM501A | 4½ digit True RMS multimeter | 1980 |
Data
- Siliconix LD120 and LD121A datasheets
- Tek Component News 256, January-February 1978:
The LD 120/LD121 converter set will cost approximately $15.00 [$72 in 2024 dollars] in 1000 lot quantities, and should be considered for applications involving 4% digit DVM systems. - See also Siliconix LD120