ADG738/ADG739 are CMOS low-voltage, 3-wire serially controlled matrix switches. The ADG738 is an 8-channel switch, while the ADG739 is a 4-channel switch. Switch resistance is very close and very flat over the entire signal range. ADG738/ADG739 uses a 3-wire serial interface that is compatible with SPI™, QSPI™, MICROWIRE™, and some DSP interface standards. The output of the shift register DOUT enables a number of these parts to be daisy-chained. On power-up, the switches are set to a high-impedance state.
The ADG738 is an 8‑channel CMOS analog matrix switch and the ADG739 is a dual 4‑channel version. Both devices use a 3‑wire serial interface compatible with SPI, QSPI and MICROWIRE, allowing daisy‑chaining of multiple parts. They operate from a single 2.7 V to 5.5 V supply and feature low on‑resistance (2.5 Ω typical) with tight matching and flatness across the signal range.
Key specifications include on‑resistance of 2.5 Ω typ, on‑resistance match 0.4 Ω typ, leakage currents as low as 0.01 nA, and bandwidths of 65 MHz (ADG738) and 100 MHz (ADG739). The devices are supplied in a 16‑lead thin‑shrink TSSOP package and are rated for an industrial temperature range of –40 °C to +85 °C.
| Supply Voltage | 2.7 V to 5.5 V |
|---|---|
| Leakage Current (OFF) typical | 0.01 nA |
| Input High Voltage (min) | 2.4 V |
| Input Low Voltage (max) | 0.8 V |
| Bandwidth (ADG738) | 65 MHz typ |
| Bandwidth (ADG739) | 100 MHz typ |
| Package | 16‑lead TSSOP (RU‑16) |
| Operating Temperature Range | -40 °C to +85 °C |
The devices operate from a single 2.7 V to 5.5 V supply.
The ADG738 is an 8‑channel matrix switch.
They are rated for –40 °C to +85 °C (industrial B version).