MAX11043

The MAX11043 includes two 8-bit coarse DACs that set the high and low references for a second-stage 12-bit fine DAC, typically used for VCO control. It is available in a 40-pin, 6mm x 6mm TQFN package and operates over the extended -40°C to +125°C temperature range. Use software controls to write to the DAC or step the DAC up and down under hardware control in programmable steps. The device operates from a +3.0V to +3.6V supply. The MAX11043 features 4 single-ended or differential channels of simultaneous-sampling ADCs with 16-bit resolution. The device contains a versatile filter block and programmable-gain amplifier (PGA)per channel. Configure each 2nd-order filter as lowpass (LP), highpass (HP), or bandpass (BP)with optional rectification. Gain and phase mismatch of the analog signal path is better than -50dB. The filter consists of seven cascaded 2ndorder filter sections for each channel, allowing the construction of a 14th-order filter. The filter coefficients are user-programmable. The ADC can digitize signals up to 200kHz. A 40MHz serial interface provides communication to and from the device. The SPI interface provides throughput of 1600ksps; 4 channels at 400ksps per channel or 2 channels at 800ksps per channel. A software-selectable scan mode allows reading the ADC results while simultaneously updating the DAC. Other features of the MAX11043 include an internal (+2.5V)or external (+2.0V to +2.8V)reference, power-saving modes, and a PGA with gains of 1 to 64. The PGA includes an equalizer (EQ)function that automatically boosts lowamplitude, high-frequency signals for applications such as CW-chirp radar.

The features of MAX11043 can be summarized as (1)4 single-ended or differential channels of simultaneous-sampling, 16-bit ADCs; (2)±10 LSB INL, ±1 LSB DNL, no missing codes; (3)93dB SFDR at 100kHz input; (4)PGA with gain of 1, 2, 4, 8, 16, 32, or 64 for each channel; (5)EQ function automatically boosts high-frequency, low-amplitude signals; (6)seven-stage internal programmable biquad filters per channel; (7)high throughput, 400ksps per channel for 4 channels; (8)dual-stage DAC Two 8-bit coarse reference DACs / 12-bit fine DAC; (9)+2.5V internal reference or +2.0V to +2.8V external reference; (10)single +3.3V operation; (11)shutdown and power-saving modes; (12)40-pin, 6mm x 6mm TQFN package; (13)-40°C to +125°C operating temperature.

The absolute maximum ratings of MAX11043 are (1)AVDD to AGND: -0.3V to +4.0V; (2)DVDD to DGND: -0.3V to +4.0V; (3)DVREG to DGND: -0.3V to +3.0V; (4)AGND to DGND: -0.3V to +0.3V; (5)Analog I/O, REFDACH, REFDACL, REFA, REFB, REFC, REFD, AOUT, REFDAC, REFBP to AGND: -0.3V to (AVDD + 0.3V); (6)UP/DWN, CONVRUN, SHDN, DACSTEP, EOC, digital I/O, OSCIN, OSCOUT to DGND: -0.3V to (DVDD + 0.3V); (7)maximum current into any pin except AVDD, DVDD, DVREG,; (8)AGND, DGND: ±50mA; (9)continuous power dissipation (TA = +70°C)TQFN multilayer board (derate 37mW/°C above +70°C): 2963mW / TQFN single-layer board (derate 26.3mW/°C above +70°C): 2105.3mW; (10)operating temperature range: -40°C to +125°C; (11)junction temperature: +150°C; (12)storage temperature range: -65°C to +150°C; (13)lead temperature (soldering, 10s): +300°C.