LTC1196/LTC1198 are 600ns, 8-bit A/D converters with sampling rates up to 1MHz. They are offered in 8-pin SO packages and operate on 3V to 6V supplies. Power dissipation is only 10mW with a 3V supply or 50mW with a 5V supply. The LTC1198 automatically powers down to a typical supply current of 1nA whenever it is not performing conversions. These 8-bit switched-capacitor successive approximation ADCs include sample-and-holds. The LTC1196 has a differential analog input; the LTC1198 offers a software selectable 2-channel MUX. The 3-wire serial I/O, SO-8 packages, 3V operation and extremely high sample rate-to-power ratio make these ADCs an ideal choice for compact, high speed systems. These ADCs can be used in ratiometric applications or with external references. The high impedance analog inputs and the ability to operate with reduced spans below 1V full scale (LTC1196) allow direct connection to signal sources in many applications, eliminating the need for gain stages. These ADCs have low power consumption (10 mW), low noise (40 μV RMS) and high accuracy (±1/2LSB), making them suitable for a wide variety of applications, including data acquisition, motor control, instrumentation and power measurement.
The LTC1196 and LTC1198 are 8‑bit switched‑capacitor successive‑approximation ADCs offering high sampling rates of up to 1 MHz (LTC1196) and 750 kHz (LTC1198). They operate from a single 3 V to 6 V supply, consume low power (10 mW at 3 V for LTC1196, 50 mW at 5 V for LTC1198), and include features such as a 3‑wire serial interface, differential inputs (LTC1196) and a software‑selectable 2‑channel MUX (LTC1198).
Typical applications include high‑speed data acquisition, portable instrumentation, and battery‑operated systems. The handbook contains detailed electrical characteristics, recommended operating conditions, and performance graphs to aid designers in integrating these converters into compact, high‑speed systems.
| Maximum Sampling Rate | 1 MHz (LTC1196), 750 kHz (LTC1198) |
|---|---|
| Power Dissipation | 10 mW at 3 V (LTC1196), 50 mW at 5 V (LTC1198) |
| Supply Voltage Range | 3 V to 6 V |
| Input Voltage Span (LTC1196) | 1 V to 5 V |
| Total Unadjusted Error | +½ LSB (typical) |
| Package Type | 8‑lead Plastic SOIC (SO‑8) |
The LTC1196 can sample at up to 1 MHz.
The LTC1198 shuts down to a typical supply current of 1 nA when not performing conversions.
The LTC1196 accepts an input span from 1 V to 5 V.
The LTC1196 dissipates about 10 mW when powered from 3 V.