AD7277 Datasheet | Analog Devices

FEATURES Throughput rate: 3 MSPS Specified for VDD of 2.35 V to 3.6 V Power consumption 12.6 m W at 3 MSPS with 3 V supplies Wide input bandwidth 70 d B SNR at 1 MHz input frequency Flexible power/serial clock speed management No pipeline delays High speed serial interface SPI-/QSPI™-/MICROWIRE™-/DSP patible Temperature range: - 40°C to +125°C Power-down mode: 0.1 μA typical 6-lead TSOT package 8-lead MSOP package AD7476 and AD7476A pin patible GENERAL DESCRIPTION The AD7276/AD7277/AD7278 are 12-/10-/8-bit, high speed, low power, successive approximation analog-to-digital converters (ADCs), respectively. The parts operate from a single 2.35 V to 3.6 V power supply and feature throughput rates of up to 3 MSPS. The parts contain a low noise, wide bandwidth trackand-hold amplifier that can handle input frequencies in excess of 55 MHz. The conversion process and data acquisition are controlled using CS and the serial clock, allowing the devices to interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CS, and the conversion is initiated at this point. There are no pipeline delays associated with the part. The AD7276/AD7277/AD7278 use advanced design techniques to achieve very low power dissipation at high throughput rates. The reference for the part is taken internally from VDD. This allows the widest dynamic input range to the ADC; therefore, the analog input range for the part is 0 to VDD. The conversion rate is determined by the SCLK. FUNCTIONAL BLOCK DIAGRAM 12-/10-/8-BIT SUCCESSIVE T/H APPROXIMATION AD7276/ AD7277/ AD7278 CONTROL LOGIC SCLK SDATA CS 04903-001 Table 1. Part Number AD7276 AD7277 AD7278 AD72741 AD72731 Figure 1. Resolution 12 10 8 12 10 Package 8-Lead MSOP 6-Lead TSOT 8-Lead MSOP 6-Lead TSOT 8-Lead MSOP 6-Lead TSOT 8-Lead MSOP 8-Lead TSOT 8-Lead MSOP 8-Lead TSOT 1 Part contains external reference pin. PRODUCT HIGHLIGHTS 1. 3 MSPS ADCs in a 6-lead TSOT package. 2. AD7476/AD7477/AD7478...