This version (18 Jul 2019 15:22) was approved by Mircea Caprioru.The Previously approved version (20 Jul 2018 11:44) is available.
Table of Contents
AD5770R - No-OS Driver
Supported Devices
Overview
The AD5770R is a 6-channel, 14-bit resolution, low noise, programmable current output digital-to-analog converter (DAC) for photonics control applications. This chip incorporates a 1.25 V on-chip voltage reference, a 2.5 kΩ precision resistor for reference current generation, die temperature, output monitoring functions, fault alarm, and reset functions.
The AD5770R contains five 14-bit resolution current sourcing DAC channels and one 14-bit resolution current sourcing/ sinking DAC channel.
Channel 0 can be configured to sink up to 60 mA and source up to 300 mA. Channel 1 to Channel 5 have multiple, programmable output current sourcing ranges, set by register access. Each DAC can operate with a wide power supply rail from 0.8 V to AVDD − 0.4 V for optimizing power efficiency and thermal power dissipation.
The AD5770R operates from 2.9 V to 5.5 V AVDD supply and specified over a temperature range of −40°C to +105°C.
Applications:
- Photonics control
- LED Driver programmable current source
Driver Description
Functions Declarations
| Function | Description |
|---|---|
int32_t ad5770r_spi_reg_read(struct ad5770r_dev *dev, uint8_t reg_addr, uint8_t *reg_data); | Read from device. |
int32_t ad5770r_spi_reg_read_multiple(struct ad5770r_dev *dev, uint8_t reg_addr, uint8_t *reg_data, uint16_t count); | Multibyte read from device. |
int32_t ad5770r_spi_reg_write(struct ad5770r_dev *dev, uint8_t reg_addr, uint8_t reg_data); | Write to device. |
int32_t ad5770r_spi_reg_write_multiple(struct ad5770r_dev *dev, uint8_t reg_addr, uint8_t *reg_data, uint16_t count); | Multibyte write from device. |
int32_t ad5770r_spi_write_mask(struct ad5770r_dev *dev, uint8_t reg_addr, uint32_t mask, uint8_t data); | SPI write to device using a mask. |
int32_t ad5770r_set_device_spi(struct ad5770r_dev *dev, const struct ad5770r_device_spi_settings *spi_settings); | Set device spi settings. |
int32_t ad5770r_channel_config(struct ad5770r_dev *dev, const struct ad5770r_channel_switches *channel_config); | Set the channel configuration. |
int32_t ad5770r_set_output_mode(struct ad5770r_dev *dev, const struct ad5770r_output_range *output_mode, enum ad5770r_channels channel); | Set the channel configuration. |
int32_t ad5770r_set_reference(struct ad5770r_dev *dev, bool external_reference, enum ad5770r_reference_voltage reference_selector); | Set reference configuration. |
int32_t ad5770r_set_alarm(struct ad5770r_dev *dev, const struct ad5770r_alarm_cfg *const alarm_config); | Set reference configuration. |
int32_t ad5770r_set_output_filter(struct ad5770r_dev *dev, enum ad5770r_output_filter_resistor output_filter, enum ad5770r_channels channel); | Set the channel output filter resistor. |
int32_t ad5770r_set_hw_ladc(struct ad5770r_dev *dev, const struct ad5770r_channel_switches *mask_hw_ldac); | Set the hardware ldac configuration. |
int32_t ad5770r_set_dac_value(struct ad5770r_dev *dev, uint16_t dac_value, enum ad5770r_channels channel); | Set dac value. |
int32_t ad5770r_set_dac_input(struct ad5770r_dev *dev, uint16_t dac_input, enum ad5770r_channels channel); | Set dac value. |
int32_t ad5770r_set_page_mask(struct ad5770r_dev *dev, const struct ad5770r_dac_page_mask *page_mask); | Set page mask for dac value and input. |
int32_t ad5770r_set_mask_channel(struct ad5770r_dev *dev, const struct ad5770r_channel_switches *mask_channel_sel); | Set channel select. |
int32_t ad5770r_set_sw_ldac(struct ad5770r_dev *dev, const struct ad5770r_channel_switches *sw_ldac); | Set software LDAC. |
int32_t ad5770r_set_channel_en(struct ad5770r_dev *dev, const struct ad5770r_channel_switches *channel_enable); | Set the enabled channels. |
int32_t ad5770r_get_status(struct ad5770r_dev *dev, uint8_t *status); | Get status value. |
int32_t ad5770r_set_monitor_setup(struct ad5770r_dev *dev, const struct ad5770r_monitor_setup *mon_setup); | Set the channel monitor configuration. |
int32_t ad5770r_init(struct ad5770r_dev **device, const struct ad5770r_init_param *init_param); | Initialize the device. |
Types Declarations
enum ad5770r_output_filter_resistor { AD5770R_OUTPUT_FILTER_RESISTOR_60_OHM = 0x0, AD5770R_OUTPUT_FILTER_RESISTOR_5_6_KOHM = 0x5, AD5770R_OUTPUT_FILTER_RESISTOR_11_2_KOHM, AD5770R_OUTPUT_FILTER_RESISTOR_22_2_KOHM, AD5770R_OUTPUT_FILTER_RESISTOR_44_4_KOHM, AD5770R_OUTPUT_FILTER_RESISTOR_104_KOHM, }; enum ad5770r_monitor_function { AD5770R_DISABLE = 0, AD5770R_VOLTAGE_MONITORING, AD5770R_CURRENT_MONITORING, AD5770R_TEMPERATURE_MONITORING }; enum ad5770r_channels { AD5770R_CH0 = 0, AD5770R_CH1, AD5770R_CH2, AD5770R_CH3, AD5770R_CH4, AD5770R_CH5 }; enum ad5770r_reference_voltage { AD5770R_EXT_REF_2_5_V = 0, AD5770R_INT_REF_1_25_V_OUT_ON, AD5770R_EXT_REF_1_25_V, AD5770R_INT_REF_1_25_V_OUT_OFF }; struct ad5770r_monitor_setup { enum ad5770r_monitor_function monitor_function; bool mux_buffer; bool ib_ext_en; enum ad5770r_channels monitor_channel; }; struct ad5770r_dac_page_mask { uint16_t dac_data_page_mask; uint16_t input_page_mask; }; struct ad5770r_output_range { uint8_t output_scale; uint8_t output_range_mode; }; struct ad5770r_device_spi_settings { bool addr_ascension; bool single_instruction; // for multibyte read/write uint8_t stream_mode_length; }; struct ad5770r_channel_switches { bool en0, en1, en2, en3, en4, en5, sink0; }; struct ad5770r_alarm_cfg { bool open_drain_en; bool thermal_shutdown_en; bool background_crc_en; bool temp_warning_msk; bool over_temp_msk; bool neg_ch0_msk; bool iref_fault_msk; bool background_crc_msk; }; |
Downloads
resources/tools-software/uc-drivers/ad5770r.txt · Last modified: 18 Jul 2019 15:22 by Mircea Caprioru