AWG22 – 22 Bit / 2 MS/s Arbitrary Waveform Generator

DC to 20kHz spectrum, 1KHz carrier, 1.2kHz filter-on

The AWG22 is a 22 bit Arbitrary Waveform Generator for medium-speed / high resolution waveform generation. The module combines an exceptional dynamic performance with a very high DC accuracy.
The AWG22 is upwards compatible with the AWG20 and also features differential outputs with a programmable common-mode voltage.
The module has 8 output ranges starting at 80mVpp up to 10.20Vpp, which covers a wide range of Unit Under Test input voltages.
A filter-bank with 4 Low Pass filters (1.2kHz, 12kHz, 40kHz, and 200kHz) provide excellent signal conditioning to obtain the best possible signal integrity. In addition there are 4 software selectable signal paths available for user defined filters.

The Module uses a combination of multiple DACs, sub-ranging and error correction to achieve a full 22 bit performance level. The result is an SNR and THD performance that surpasses 24-bit AWGs. The excellent linearity, step response, and DC accuracy makes it a very general purpose unit suitable for sine wave generation, ultra linear ramp generation and fast stepping signals. With 4M-word (12M-byte) of memory very complex signal shapes can be generated.
All these features ensure extremely accurate results when performing analog measurements. The unit is very suitable for testing ADCs on linearity and dynamic performance.

Block Diagram

AWG22 – 22 Bit / 2 MS/s Arbitrary Waveform Generator

Key Features

  • 2 MHz maximum sample speed
  • 22 bit resolution
  • Differential or Single ended output
  • 8 output ranges from 80mV to 10.20Vpp
  • Selectable filters to improve signal quality
  • THD: -121dB @ 1kHz (typ. with 1.2kHz filter)
  • SNR: 98dB, DC-500kHz/107dB, 20Hz-20kHz
  • Programmable common mode voltage
  • For ATX series hardware platform

Technical Specifications

General

Resolution 22 bit
Update rate DC - 2MHz
Pattern depth 4M words

Output characteristics

Output impedance 50 Ohm or low impedance (<1 Ohm)
Ranges Single Ended (Vpp) 79.68 mV, 0.159375 V, 0.31875 V, 0.6375 V, 1.275 V, 2.55 V, 5.10 V, 10.20 V
Ranges differential (Vpp) 0.159375 V, 0.31875 V, 0.6375 V, 1.275 V, 2.55 V, 5.10 V, 10.20 V, 20.40 V
Output filters (4 pole Butterw.) Bypass, 1.2 kHz, 12 kHz, 40 kHz, 200 kHz, plus 4 user signal paths
Bandwidth, -3 dB (typical) 500 kHz (5.10 Vpp range)
0.1 dB flatness (typical) DC - 100 kHz (5.10 Vpp range)
Output configuration Differential, Single Ended, 50 Ohm
Output operating range +/- 10.20 V

Accuracy (filter bypass)

Absolute accuracy ±(25 µV + 8 ppm of range)
Non Linearity 3 ppm of range (1.5 ppm typical)
Temperature drift (typical) ±(1 ppm of range + 2 ppm of value)/°C

Common mode voltage source

Resolution 20 Bit (10 µV)
Voltage range -5.10 V to +5.10 V
DC-offset accuracy ±(10 µV + 6 ppm of value)
Non Linearity ±5 ppm of range

Dynamic characteristics

(5Vpp output signal, 1.5Msps, BW DC-500kHz)

SNR (1 kHz) 97 dB
SNR (10 kHz) 95 dB
SNR (100 kHz) 91 dB
SNR (1 kHz input, A-weighted) 107 dB (BW 20 Hz - 20 kHz)
THD (1 kHz) -111 dB
THD (1 kHz with 1.2 kHz filter) -120 dB
THD (10 kHz) -109 dB
THD (100 kHz) -88 dB
THD (100 kHz 2 Vpp) -90 dB (typical)
SFDR (1 kHz) 112 dB

Clock & Trigger inputs

Input impedance > 1 MOhm
Threshold level 3.3 V CMOS/TTL (5 V tolerant)