EVALUATION KIT AVAILABLE MAX11040K/MAX11060 24-/16-Bit, 4-Channel, Simultaneous-Sampling, Cascadable, Sigma-Delta ADCs General Description Benefits and Features The MAX11040K/MAX11060 are 24-/16-bit, 4-channel, Feature Set Ideal for Energy Measurement Systems simultaneous-sampling, sigma-delta analog-to-digital Four Fully Differential Simultaneously Sampled Channels converters (ADCs). The devices allow simultaneous sam- pling of as many as 32 channels using a built-in cascade Cascadable for Up to 32 Channels of Simultaneous Sampling feature to synchronize as many as eight devices. The serial interface of the devices allows reading data from Programmable Sampling Phase for Phase Shift Compensation all the cascaded devices using a single command. Four 0 to 333s in 1.33s Steps modulators simultaneously convert each fully differential analog input with a programmable data output rate rang- Programmable Output Data Rate with 0.065% ing from 0.25ksps to 64ksps. The devices achieve 106dB Resolution SNR at 16ksps and 117dB SNR at 1ksps (MAX11040K). Excellent Performance for High-Accuracy The devices operate from a single +3V supply. The differ- Measurement Applications ential analog input range is 2.2V when using the internal 117dB SNR at 1ksps reference an external reference is optional. Each input 106dB SNR at 16ksps is overvoltage protected up to 6V without damage. The 0.25% Error Over a 1000:1 Dynamic Range devices use an internal crystal oscillator or an external 2.2V Full-Scale Input Range source for clock. Single-Supply Operation and Protected Inputs for The devices are compatible with SPI, QSPI, Design Simplicity and Robustness MICROWIRE , and DSP-compatible 4-wire serial inter- 3.0V to 3.6V Analog Supply Voltage faces. An on-board interface logic allows one serial 2.7V to V Digital Supply Voltage AVDD interface (with a single chip select) to control up to eight 6V Overvoltage Protected Inputs cascaded devices or 32 simultaneous sampling analog -40C to +105C Operating Temperature Range input channels. The devices are ideally suited for power-management Ordering Information systems. Each channel includes an adjustable sampling PART TEMP RANGE PIN-PACKAGE phase enabling internal compensation for phase shift due MAX11040KGUU+ -40C to +105C 38 TSSOP to external dividers, transformers, or filters at the inputs. MAX11060GUU+ -40C to +105C 38 TSSOP The output data rate is adjustable with a 0.065% resolu- tion (at 16ksps or below) to track the varying frequency of +Denotes a lead(Pb)-free/RoHS-compliant package. a periodic input. A SYNC input allows periodic alignment of the conversion timing of multiple devices with a remote Functional Diagram timing source. OVRFLW FAULT The devices are available in a 38-pin TSSOP package spec- ified over the -40C to +105C industrial temperature range. AIN0+ 24-BIT DIGITAL SYNC ADC FILTER AIN0- DRDYIN REF0 Applications DRDYOUT AIN1+ 24-BIT DIGITAL ADC FILTER AIN1- Power-Protection Relay Equipment REGISTERS AND CASCIN SERIAL REF1 DIGITAL INTERFACE CASCOUT CONTROL Multiphase Power Systems AIN2+ 24-BIT DIGITAL ADC FILTER AIN2- CS Industrial Data-Acquisition Systems REF2 SCLK AIN3+ DIN Medical Instrumentation 24-BIT DIGITAL ADC FILTER DOUT AIN3- REF3 For related parts and recommended products to use with this part, refer MAX11040K to www.maximintegrated.com/MAX11040K.related. 2.5V CRYSTAL REFIO REFERENCE OSCILLATOR MICROWIRE is a registered trademark of National Semiconductor Corp. AGND XIN XOUT CLKOUT DGND QSPI is a trademark of Motorola, Inc. 19-5741 Rev 4 5/15MAX11040K/MAX11060 24-/16-Bit, 4-Channel, Simultaneous-Sampling, Cascadable, Sigma-Delta ADCs Absolute Maximum Ratings AVDD to AGND ........................................................-0.3V to +4V AIN to AGND (V < 3V or V < 2.7V or FAULTDIS = 1 AVDD DVDD DVDD to DGND......................................-0.3V to (V + 0.3V) or SHDN = 1 or f < 20MHz)..............-3.5V to +3.5V AVDD XIN CLOCK AGND to DGND.....................................................-0.3V to +0.3V REFIO, REF to AGND..........................-0.3V to (V + 0.3V) AVDD DIN, SCLK, CS, XIN, SYNC, DRDYIN, Maximum Current into Any Pin............................................50mA CASCIN to DGND............................-0.3V to (V + 0.3V) Continuous Power Dissipation (T = +70C) DVDD A DOUT, DRDYOUT, CASCOUT, CLKOUT, TSSOP (derated 13.7mW/C above +70C)..............1096mW XOUT to DGND................................-0.3V to (V + 0.3V) Operating Temperature Range .........................-40C to +105C DVDD FAULT, OVRFLW to DGND ...................................-0.3V to +4.0V Storage Temperature Range .............................-60C to +150C AIN + to AIN - ......................................................-6.0V to +6.0V Junction Temperature......................................................+150C AIN to AGND (V 3V, V 2.7V, FAULTDIS = 0, Lead Temperature (soldering, 10s) .................................+300C AVDD DVDD SHDN = 0, f 20MHz)...................-6.0V to +6.0V Soldering Temperature (reflow) .......................................+260C XIN CLOCK 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 in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics (V = +3.0V to +3.6V, V = +2.7V to V , f = 24.576MHz, f = 16ksps, V = +2.5V (external), C = AVDD DVDD AVDD XIN CLOCK OUT REFIO REFIO C = C = C = C = 1F to AGND, T = T to T , unless otherwise noted. Typical values are at T = +25C.) (Note 1) REF0 REF1 REF2 REF3 A MIN MAX A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC ACCURACY (Note 2) MAX11040K 24 Resolution Bits MAX11060 16 24-bit no missing code (MAX11040K) Differential Nonlinearity DNL 0.1 LSB 16-bit no missing code (MAX11060) T = +25C and +105C (MAX11040K) 0.001 0.004 A Integral Nonlinearity (Note 3) INL T = -40C (MAX11040K) 0.006 %FS A MAX11060 0.001 Offset Error -1 +1 mV Gain Error (Note 4) -1 +1 %FS Offset-Error Drift (Note 5) 0.5 ppm/C Gain-Error Drift (Note 5) 1 ppm/C Change in Gain Error vs. f f = 0.25ksps to 64ksps < 0.025 % FS OUT OUT Channel-to-Channel Gain Matching 0.03 % FS DYNAMIC SPECIFICATIONS (62.5Hz sine-wave input, 2.17V ) P-P (Note 6) (MAX11040K) 103 106 Signal-to-Noise Ratio SNR dB (Note 6) (MAX11060) 94.5 T = +25C and +105C (MAX11040K) -94 A Total Harmonic Distortion THD T = -40C (MAX11040K) -90 dB A MAX11060 -106 T = +25C and +105C (MAX11040K) 93 98 A Signal-to-Noise Plus Distortion SINAD T = -40C (MAX11040K) 89 dB A MAX11060 94 T = +25C and +105C (MAX11040K) 94 100 A Spurious-Free Dynamic Range SFDR T = -40C (MAX11040K) 89 dB A MAX11060 100 0.1%FS input (MAX11040K) 0.25 Relative Accuracy (Note 7) % 6.0%FS input (MAX11040K) 0.005 Maxim Integrated 2 www.maximintegrated.com