LHA8960D
The LHA8960 is a 16-bit successive approximation register (SAR) analog-to-digital converter operating from a single VDD supply rail. It integrates a low-power high-speed 16-bit sampling ADC and a multi-function serial interface port. On the rising edge of the CNV conversion signal, the LHA8960 samples the differential voltage between IN+ and IN− pins; the IN+ pin swings from 0 V to VREF, while IN− is tied to ground. The reference voltage (REF) is supplied externally and can operate independently of the main VDD supply. Device power consumption varies linearly with sampling throughput.
The SPI-compatible serial interface allows multiple ADCs to be daisy-chained onto a single 3-wire bus via the SDI input pin, with an optional conversion busy status indicator. A separate VIO I/O supply rail enables direct compatibility with 1.8 V, 2.5 V, 3 V and 5 V microcontroller logic voltages.
The LHA8960 is available in 10-lead MSOP and compact 10-lead QFN packages, specified over the industrial temperature range of −40°C to +125°C.
Product Features
- 16-bit resolution with no missing codes
- Throughput rate options: — LHA8960D: 1 MSPS — LHA8960C: 500 kSPS
- Ultra-low power consumption
— 3.6 mW at 1 MSPS (analog VDD supply only)
— Total power dissipation: 7 mW at 1 MSPS
— 70 μW power draw at 10 kSPS - Integral Non-Linearity (INL): ±0.7 LSB typical
- Dynamic range: 92 dB
- Signal-to-Noise Ratio (SNR): 91.8 dB at VREF = 5 V
- Total Harmonic Distortion (THD): −112 dB
- Single-ended analog input range: 0 V to VREF
- Zero pipeline latency / conversion delay
- Single 1.8 V core supply; SPI I/O compatible with 1.8 V / 2.5 V / 3 V / 5 V logic levels
- Daisy-chain capable for multi-ADC stacking, with conversion busy flag output
- Packages: 10-lead MSOP, 3 mm × 3 mm QFN
Application Scenario
- Battery-powered portable equipment
- General data acquisition systems
- Medical instrumentation
- Seismic data acquisition equipment
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