1 Features
• High-speed and low-power:
– ADS9219: 20MSPS/ch, 230mW/ch
– ADS9218: 10MSPS/ch, 146mW/ch
– ADS9217: 5MSPS/ch, 95mW/ch
• 2-channel, simultaneous sampling
• Feature integration:
– Integrated ADC driver
– Integrated precision reference
– Common-mode voltage output buffer
• High performance:
– 18-bit no-missing-codes
– INL: ±1LSB, DNL: ±0.75LSB
– SNR: 95.5dB and 104.5dB SNR with OSR = 16
• Wide input bandwidth (–3dB):
– ADS9219 and ADS9218: 90MHz
– ADS9217: 45MHz
• Serial LVDS interface:
– SDR and DDR output modes
– Synchronous clock and data output
• Extended operating range: –40°C to +125°C

2 Applications
• Power analyzers
• Source measurement units (SMU)
• Marine equipment
• Servo drive position feedback
• DC power supplies, AC sources, electronic loads

3 Description
The ADS921x is a family of 18-bit, high-speed, dualchannel,
simultaneous-sampling, analog-to-digital
converters (ADCs) with an integrated driver for the
ADC inputs. The integrated ADC driver simplifies
the signal chain, reduces power consumption for
precision applications, and supports high-frequency
signals beyond 1MHz. By not requiring an external
decoupling capacitor, the integrated ADC reference
buffer is optimized for wide bandwidth applications.
The ADS921x uses a serial LVDS (SLVDS)
data interface that enables high-speed digital
communication while minimizing digital switching
noise. Read the dual-channel ADC data using
separate SLVDS outputs per ADC channel or one
SLVDS output for both ADC channels.