ADS7827IDRBRG4

ADS7826 ADS7827 ADS7829 SLAS388 – JUNE 2003 10/8/12-BIT HIGH SPEED 2.7 V microPOWER™ SAMPLING ANALOG-TO-DIGITAL CONVERTER FEATURES DESCRIPTION • High Throughput at Low Supply Voltage (2.7 V VCC) – ADS7829: 12-bit 125 KSPS – ADS7826: 10-bit 200 KSPS – ADS7827: 8-bit 250 KSPS • Very Wide Operating Supply VoltageL: 2.7 V to 5.25 V (as Low as 2.0 V With Reduced Performance) Rail-to-Rail, Pseudo Differential Input Wide Reference Voltage: 50 mV to VCC Micropower Auto Power-Down: – Less Than 60 µW at 75 kHz, 2.7 V VCC The ADS7826/27/29 is a family of 10/8/12-bit sampling analog-to-digital converters (A/D) with assured specifications at 2.7-V supply voltage. It requires very little power even when operating at the full sample rate. At lower conversion rates, the high speed of the device enables it to spend most of its time in the power down mode— the power dissipation is less than 60 µW at 7.5 kHz. • • • • • Low Power Down Current: 3 µA Max Ultra Small Chip Scale Package: 8-pin 3 x 3 PDSO (SON, Same Size as QFN) • SPI™ Compatible Serial Interface The ADS7826/27/29 also features operation from 2.0 V to 5 V, a synchronous serial interface, and a differential input. The reference voltage can be set to any level within the range of 50 mV to VCC. Ultra-low power and small package size make the ADS7826/27/29 family ideal for battery operated systems. It is also a perfect fit for remote data acquisition modules, simultaneous multichannel systems, and isolated data acquisition. The ADS7826/27/29 family is available in a 3 x 3 8-pin PDSO (SON, same size as QFN) package. APPLICATIONS • • • • Battery Operated Systems Remote Data Acquisition Isolated Data Acquisition Simultaneous Sampling, Multichannel Systems Control SAR VREF D OUT +In Serial Interface CDAC –In S/H Amp Comparator DCLOCK CS/SHDN microPOWER is a trademark of Texas Instruments. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2003, Texas Instruments Incorporated ADS7826 ADS7827 ADS7829 www.ti.com SLAS388 – JUNE 2003 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. PACKAGE/ORDERING INFORMATION MAXIMUM LINERARITY ERROR (LSB) PRODUCT INTEGRAL DIFFERENTIAL PACKAGE (1) SPECIFICATION TEMPERATURE RANGE PACKAGE MARKING (2) ORDERING NUMBER TRANSPORT MEDIA ADS7829I ±2 ±2 SON-8 -40°C to 85°C F29 ADS7829IDRBR Tape and reel ADS7829IB ±1.25 -1/1.25 SON-8 -40°C to 85° F29 ADS7829IBDRBR Tape and reel ADS7826I ±1 ±1 SON-8 -40°C to 85°C F26 ADS7826IDRBR Tape and reel ADS7827I ±1 ±1 SON-8 -40°C to 85°C F27 ADS7827IDRBR Tape and reel ADS7829I ±2 ±2 SON-8 -40°C to 85°C F29 ADS7829IDRBT Tape and reel ADS7829IB ±1.25 -1/1.25 SON-8 -40°C to 85°C F29 ADS7829IBDRBT Tape and reel ADS7826I ±1 ±1 SON-8 -40°C to 85°C F26 ADS7826IDRBT Tape and reel ADS7827I ±1 ±1 SON-8 -40°C to 85°C F27 ADS7827IDRBT Tape and reel (1) (2) For detail drawing and dimension table, see end of this data sheet or package drawing file on web. Performance Grade information is marked on the reel. ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range (unless otherwise noted) (1) VCC 6V Analog input Logic input -0.3 V to (VCC + 0.3 V) -0.3 V to 6 V Case temperature 100°C Junction temperature 150°C Storage temperature 125°C External reference voltage 5.5 V (1) 2 Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. ADS7826 ADS7827 ADS7829 www.ti.com SLAS388 – JUNE 2003 SPECIFICATIONS At -40°C to 85°C, VCC = 2.7 V, Vref = 2.5 V, unless otherwise specified. TEST CONDITIONS PARAMETER ADS7829IB MIN TYP ADS7829 MAX MIN 0 Vref TYP ADS7826I MAX MIN 0 Vref TYP ADS7827I TYP MAX UNIT MAX MIN 0 Vref 0 Vref V V ANALOG INPUT Full-scale input span +In - (-In) Absolute input range +In -0.2 VCC +0.2 -0.2 VCC +0.2 -0.2 VCC +0.2 -0.2 VCC +0.2 -IN -0.2 1.0 -0.2 1.0 -0.2 1.0 -0.2 1.0 V Capacitance 25 25 25 25 pF Leakage current ±1 ±1 ±1 ±1 µA 8 Bits SYSTEM PERFORMANCE Resolution 12 No missing codes 12 12 Integral linearity error -1.25 10 11 ±0.4 1.25 -2 10 ±0.8 2 -1 8 ±0.3 1 -1 Bits ±0.2 1 LSB (1) Differential linearity error -1 ±0.4 1.25 -2 ±0.8 2 -1 ±0.3 1 -1 ±0.2 1 LSB Offset error -3 ±0.3 3 -3 ±0.6 3 -2 ±0.4 2 -1 ±0.4 1 LSB Gain error -2 ±0.3 2 -2 ±0.6 2 -1 ±0.3 1 -1 ±0.2 1 LSB Noise 33 33 33 33 µVrms Power supply rejection 82 82 94 98 dB SAMPLING DYNAMICS Conversion time 12 Acquisition time 12 1.5 fDCLOCK 1.5 16 x fsample Throughput (sample rate) fsample 10 8 1.5 16 x fsample 1.5 14 x fsample DCLOCK Cycles DCLOCK Cycles 12 x fsample kHz 2.7 V ≤ VCC ≤ 5.25 V (2) 125 125 200 250 kHz 2.0 V ≤ VCC < 2.7 V (3) (2) 75 75 85 100 kHz DYNAMIC CHARACTERISTICS Total harmonic distortion -82 -80 -78 -72 dB SINAD VIN = 2.5 Vpp at 1 kHz 72 70 62 50 dB Spurious free dynamic range (SFDR) VIN = 2.5 Vpp at 1 kHz 85 82 81 68 dB REFERENCE INPUT Voltage range Resistance Current drain 2.7 V ≤VCC≤3.6 V 0.05 CS = GND, fSAMPLE = 0 Hz VCC-0.2 0.05 5 CS = VCC 5 Full speed at Vref/2 12 fSAMPLE = 7.5 kHz 0.8 CS = VCC 0.001 VCC-0.2 0.05 5 5 60 12 0.001 0.05 20 24 0.001 GΩ 120 µA 3 µA 0.8 3 0.001 V GΩ 5 100 0.8 3 VCC-0.2 5 5 60 0.8 3 VCC-0.2 5 µA DIGITAL INPUT/OUTPUT Logic family CMOS CMOS CMOS CMOS Logic levels VIH IIH = +5 µA 2.0 5.5 2.0 5.5 2.0 5.5 2.0 5.5 V VIL IIL = +5 µA -0.3 0.8 -0.3 0.8 -0.3 0.8 -0.3 0.8 V (1) (2) (3) LSB means Least Significant Bit and is equal to Vref / 2 N where N is the resolution of ADC. For example, with Vref equal to 2.5 V, one LSB is 0.61 mV for a 12 bit ADC (ADS7829). See the Typical Performance Curves for VCC = 5 V and Vref = 5 V. The maximum clock rate of the ADS7826/27/29 are less than 1.2 MHz at 2 V ≤VCC