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AD7690BRMZ-RL7 Analog To Digital Converters ADC IC Chip Differential ADC MSOP LFCSP
GENERAL DESCRIPTION
The AD76901 is an 18-bit, successive approximation, analog-todigital converter (ADC) that operates from a single power supply, VDD. It contains a low power, high speed, 18-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. On the CNV rising edge, it samples the voltage difference between the IN+ and IN− pins. The voltages on these pins swing in opposite phase between 0 V and REF. The reference voltage, REF, is applied externally and can be set up to the supply voltage. The power of the AD7690 scales linearly with the throughput. The SPI-compatible serial interface also features the ability, using the SDI input, to daisy-chain several ADCs on a single, 3-wire bus and provides an optional busy indicator. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate VIO supply. The AD7690 is housed in a 10-lead MSOP or a 10-lead LFCSP with operation specified from −40°C to +85°C.
| Table 1.MSOP,LFCSP/SOT-2314-/16-/18-Bit PulSAR ADC | |||||
| Type | 100 kSPS | 250 kSPS | 400 kSPS to 500 kSPS | 1000 kSPS | ADC Driver |
| 18-Bit Tre Differential 16-Bit Tre Differential 16-Bit Pseudo Differential 14-Bit Pseudo Differentia | AD7684 AD7680 AD7683 AD7940 | AD769 AD7687 AD7685 AD7694 AD7942 | AD7690 AD7982 AD7688 AD7693 AD7686 AD7946 | AD7982 AD7980 | ADA4941 ADA4841 ADA4941 ADA484 ADA484 ADA484 |
| SPECIFICATIONS | |||||
| VDD=4.75Vto 5.25 V,VIO=2.3 V to VDD,Vg=VDD,all specifications Tmnx
to Tmax,unless otherwise noted. Table 2 | |||||
| Parameter | Conditions | Min Typ Max | Unit | ||
| RESOLUTION | 18 | Bits | |||
| ANALOG INPUT Voltage Range Absolute Input Voltage Common-Mode Input Range Analog Input CMRR Leakage Current at 25℃ Input lmpedance | IN+to IN- IN+,IN- IN+,IN- fin =250 kHz Acquisition phase | —VREF -0.1 VREF/2-0.1 | VREF/2 65 1 | +VREF VREF+0.1 VREF/2+0.1 | V V V dB nA |
| THROUGHPUT Conversion Rate Transient Response | Full-scale step | 0 400 400 | kSPS ns | ||
| ACCURACY No Missing Codes ntegral Linearity Error Differential Linearity Error Transition Noise Gain Error³ Gain Error Temperature Drift Zero Error³ Zero Temperature Drift Power Supply Sensitivity | REF=VDD=5V VDD=5V±5% | 18 -1.5 -1 -40 -0.8 | ±0.75 ±0.5 0.75 ±2 ±0.3 ±0.3 ±0.25 | +1.5 +1.25 +40 +0.8 | Bits LSB² LSB LSB LSB ppm/℃ mV ppm/℃ LSB |
| AC ACCURACY Dynamic Range Oversampled Dynamic Range Signal-to-Noise Spurious-Free Dynamic Range Total Harmonic Distortion Signal-to-(Noise +Distortion) ntermodulation Distortion⁶ | VREF=5V fin=1 kSPS fiN=1kHz,VEF=5V in =1 kHz,VreF=2.5V in =1 kHz,VREF=5V iw =1 kHz,VREF=5V in =1 kHz,VRer=5V | 101 100 94.5 100 | 102 125 101.5 96 -125 -125 101.5 115 | dB⁴ dB dB dB dB dB dB dB | |
| ORDERING | GUIDE | |||||||
| Model1.2,3 | Notes | Temperature Range | Package Description | Package Option | Branding | Ordering Quantity | ||
| AD7690BCPZRL AD7690BCPZRL7 AD7690BRMZ AD7690BRMZ-RL7 EVAL-AD7690SDZ EVAL-SDP-CB1Z | -40℃ -40℃ -40℃ -40℃ | to +85℃ to +85℃ to +85℃ to +85℃ | 10-Lead LFCSP_WD 10-Lead LFCSP_WD 10-Lead MSOP 10-Lead MSOP Evaluation Board Controller Board | CP-10-9 CP-10-9 RM-10 RM-10 | C4C C4C C4C C4C | Reel,5,000 Reel,1,000 Tube,50 Reel,1,000 | ||
