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Document the AD3530/AD3530R (8-channel) and AD3531/AD3531R (4-channel) low-power, 16-bit, buffered voltage output DACs with software- programmable gain controls. They provide full-scale output spans of 2.5V or 5V for reference voltages of 2.5V. These devices operate on a single 2.7V to 5.5V supply and are guaranteed to be monotonic by design. The "R" variants include a 2.5V, 5ppm/°C internal reference, which is disabled by default. Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Reviewed-by: David Lechner <dlechner@baylibre.com> Signed-off-by: Kim Seer Paller <kimseer.paller@analog.com> Link: https://patch.msgid.link/20250429-togreg-v7-2-0af9c543b545@analog.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>